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How Sing Core Enhances Your Renovation

Sing Core and your Renovation 

Planning to remodel your home or office can be a stressful, time consuming, and confusing process. Deciding what needs to be replaced, and what to replace it with, can send you down a rabbit hole that ultimately leads you right back to where you started. When it comes to doors, Sing Core has you covered.

There’s no need to bother with the decision fatigue that comes with so many choices, because Sing Core is the best option when it comes to doors, bar none. With our lightweight and sturdy design, you can be confident that out product will stand the test of time. Not only that, it’s also durable and guaranteed not to warp, which is not something our competitors can claim.

Using our patented honeycomb panel, architects and craftsmen around the country have been creating gorgeous additions to homes. Whether it be a pivot door, sliding door, or any other form of entry, Sing Core is the industry best when it comes to quality and durability. Just look at our long track record of success stories from satisfied customers, and you’ll see we hold up to our promise.

Not only that, but every Sing Core product comes with a 50 Year Guarantee, meaning in the unlikely event that your door does present any issues, we’ll make it right up to 50 years later. With this promise, you never have to worry about replacing your doors again.

 

What are the benefits of a Sing Core door?

What other benefits come with Sing Core products? Well, for one, they’re lightweight. This means that the hardware and framing used to install the door don’t take the regular wear and tear that comes with other products that are significantly heavier. In addition, our doors are impact resistant and warp-free, meaning they won’t be ruined by bumping into them, and they’ll never warp on you. The fully insulated core offers increased control over your internal climate and gives you the assurance that you won’t be surging your heating bill up by installing one of our doors. They’re also sound deadening, allowing for use in many other applications where sound may be of concern. Lastly, our doors are crafted with high precision techniques by master craftsmen, guaranteeing a consistent and reliable product every time.

 

What doors can I use Sing Core for?

Nearly all door types can be crafted using Sing Core technology. Pivot doors, sliding doors, garage doors, hinged doors, and many others. These doors can be used internally, externally, and for nearly any purpose. Check out these pictures of our product in use:

 

Summary

Deciding to renovate your home or office is a big step. Sing Core is here to make that process smooth and easy, allowing you to spend less time worrying about doors and more time designing your dream space. With Sing Core doors, you are guaranteed to have an incredible, durable, and long-lasting feature that will never fail, and you will never regret.

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How to Build the Biggest Warp-free Door

Sing Core has long been in the business of building the biggest warp-free doors in the world. And now you can learn how to build the biggest warp-free door as well. The first thing to note is that Sing Core does not build doors, even though Sing Core is credited and called out in architectural specifications as Sing Core door(s).

Inventor Peter Sing’s patent and patent-pending inventions are deployed in Sing’s Sing Core factory to provide the warp-free basis for high-end millworks and the biggest door companies for building big doors, over 8 ft. tall and up to 50 ft. or more, that can be guaranteed not to warp, bend, twist, cup, or otherwise fail for 50 years.

New Door or Replacement Door

Sing Core assists in the building of either New Doors, doors that have not existed before, or Replacement Doors, doors that are being replaced and may have to be replicated to maintain the appearance of the original door, such as in the case of participating in a historical restoration.

How to Build the Biggest Warp-free Door

Since Sing Core does not build doors, it is up to the architect to imagine what size the new door should be and of what materials the door should be made of. In the case of replacement doors, Sing Core is provided all the specs based on the original door to be either replaced or replicated.

The following steps are followed in making a door with Sing Core inside:

Step 1: Answer questions, and estimate

  • What is the size (length, width, thickness) of the door?
  • How will you be finishing the door
  • What type of door hardware will be used (hinge, pivot, sliding, overhead, etc.)?
  • What style of door (flush, architectural, plank, French, Dutch, etc.)?
  • How and where will the door be used?
  • Will this be an interior or exterior door?
  • Are there other specifications (weight, insulation, sealing, etc.)?

Step 2: Re-evaluate and refer to Sing’s True Flat Team, if necessary

Evaluate your estimate and let Sing Core know if we can help meet your budget

The True Flat team is available to help you provide your customer with a door that fits within their budget.

Sing Core and the True Flat team can suggest ways of changing some of the details of the panel, such as, reducing the height/width or choosing a more cost-effective skin.

Steps might need to be made to modify Sing’s composite hybrid solid substrate to accommodate the challenges that may not have been noted in the original details gathered in Step 1.

Step 3: Manufacture specified Sing Core

The specific Sing Core substrate core is then manufactured in Sing’s factory by skilled workers who have been manufacturing Sing’s cores for years using Sing’s patented and patent-pending technologies. Occasionally, a new challenge is recognized that the true Flat Team has never seen before, that is when Sing get to inventing again, and when a solution is achieved, this will likely lead to another patented solution.

The core which is based on Sing’s insulated reinforced vertical grain torsion box core, may or may not be framed, and is sandwiched between two matching skins, ready to be used as door core.

If no other services are required, skip Step 4, and go directly to Step 5.

Step 4: Additional services

To further assist the millworks and door companies in the manufacturing process, Sing Core may provide other services. For instance, the millwork or door builder may elect to have Sing’s factory apply additional outer door skins to the completed Sing Core substrate, in a sense, creating a custom door blank.

Some of the additional services that Sing’s factory may provide, include:

  • Trimming
  • Adding exterior skins
    • Wood stave
    • Veneer
    • Cement board or concrete
    • High Pressure Laminate (HPL)
    • Fiberglass
    • Formica
    • Metal
      • Aluminum
      • Cold rolled steel
      • Copper
      • Galvanized steel
      • Hot rolled steel
      • Lead
      • Stainless steel
    • Impact/Bulletproof/Blast resistant materials
  • Light cutouts, openings, for glass inserts
  • Routing for architectural grooves

Step 5: Package and ship to millwork or door company

Sing’s factory packages and ships the door core or prepared blank to the millwork or door company who will finish the door.

Step 6: Finishing

Finishing takes place at the millwork or door company who installs hardware, finishes, and hangs the door, which is ready for installation.

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Alternative to Aluminum Honeycomb Panel

Sing Core’s alternative to aluminum honeycomb panel. aluminum honeycomb panel is used as core material in a variety of applications such as facades, walls, floors, ceilings, roofs, inside doors and partitions. Aluminum honeycomb core also found inside workbenches, craft tables, laser cutting tables, and a wide range of other types of work surfaces, especially when there is a desire to reduce the weight of the end product.

Increasingly, Sing Core is replacing aluminum honeycomb core with its Sing HPL Sandwich Core.

Sing HPL Sandwich Core

Sing HPL Sandwich Core is far superior to any aluminum honeycomb core in the following areas:

1.  Strength-to-weight ratio

2.  Fully insulated

3 High precision

4. Longevity

5.  Eco-friendly

6.  Warp-free

7.  Low cost

Sing HPL Sandwich Core serves as base core in many industries including government, scientific, universities, military, space exploration, aeronautics, nautical, in submarines, public transportation, railways, corporate, and industrial warehousing, just to name a few.

1. Strength to Weight Ratio

Sing HPL Sandwich Core exceeds all expectations when it comes to strength vs. weight thanks to SingCore’s patented and patent-pending technologies which are the foundation for the success of Sing’s core. Long ago, Sing coined the phrase,

“Heavy does not mean strong, and lightweight doesn’t have to be weak.”

Sing’s invention changed the way architects and engineers brought their creative endeavors and problem-solving solutions to life.

2. Fully Insulated

Sing HPL Sandwich Core is a key ingredient in breach proof impact doors, and other applications where sound proofing, refrigeration, defense, and separation is imperative. Due to the nature and construction of Sing’s HPL Sandwich Core, no effort needs to be made to achieve an acceptable degree of sound deadening or climate control.

3. High precision

When the attention to detail demands high precision, no core material is more precise or stable than Sing HPL Sandwich Core sporting an impressive .006-inch tolerance. This is why Sing HPL Sandwich Core is hands down the go-to solution for dead flat tables supplied by the best high-end millworks in America today.

4. Longevity

When it comes to composite cores, risk is assumed in the area of the lamination process which holds the various products together over time. Sing’s patented and patent pending technologies eliminate the risk of delamination over the life of the product in use. And even comes with a 50-year structure warranty which includes delamination, so you don’t have to worry about it.

5. Eco-friendly

Aluminum Honeycomb Panels are made offshore and imported for use in the USA. Why? Because the production process is so toxic to the environment that it would be nearly illegal to manufacture in the United States. Even so, we still share the same air and oceans with our neighbors outside our borders. This matters to Peter Sing who only uses USA-sourced and natural materials holding the highest standards for Eco-friendly manufacturing methods for a better world.

6. Warp-free

Sing HPL Sandwich Core is long-renowned as, “the only way” to create large, panelized structure materials that will not warp under strenuous conditions. Though note that Sing’s True Flat Team must be involved in the engineering and manufacturing of the project because many factors must be taken into consideration to create a warp-free product, such as size, skin type, location, and application. Still, the only 50-year warp-free guarantee in the industry, regardless of size.

 

Other Types of Core Materials

Sing HPL Sandwich Core is vastly in the process of becoming the replacement core of choice over other types of lightweight core materials such as paper honeycomb, and different kinds of urethane core, EPS core, wood-based core, such as particleboard, LVL, solid wood core, as well as aluminum honeycomb core to keep the working subject straight, flat, or lightweight over time without fail.

Sing MDF Composite

Going a step beyond the Sing HPL Sandwich Core, one of the most popular hybrid composite products in huge demand is Sing’s MDF Composite available in core or panelized with solid wood edges and implants. This has the embedded HPL for all the high performance results, plus it is topped with a super smooth 1/8” MDF for easy painting or lamination of nearly any material.

 

 

 

Sing Core MDF Composite

This is one very basic, less expensive option, but if you want to be straight, with concern of warping, or telegraphing, would require an upgrade with special skin underlayment beneath the MDF skin on top of Sing Core.

This creates a either a core material or full panel with stable material on both sides with MDF skin for paint grade or cold press purposes. More stable translates to less chance of telegraphing, and designed for high-end precision and smoothness. The price is a little bit over than that of standard MDF-only skin.

But, if you want to do hot press, then you must take advantage of our special hot press process. That means you can accommodate the increased high temperature and high pressure without worrying about any telegraphing. This is the most expensive method for the most demanding clients.

 

 

 

 
 

 

 

 

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Pivot Door | Pivot Door

Sing Core’s Pivot Door

Sing Core's Pivot Door

Sing Core’s Pivot Door

A Pivot Door is one of the most significant features in contemporary architecture. When contemplating your design, contemplate Sing Core’s Pivot Door. Sing Core builds the premier lightweight fully insulated and sound-deadening Pivot Door. This is the perfect Pivot Door for your new construction or remodel. 

A pivot door for your main entryway makes a statement to your visitors. It’s the first thing people see before they enter your home. It also creates curb appeal like no other. 

Get the most impact from your pivot door, choose Sing Core! Sing Core’s custom design means your pivot door is built impressively tall, wide, or lightweight. With Sing Core, your home is sure to impress. A quality pivot door makes a statement from a distance. 

How large to build your pivot door? The answer is resounding. “As large as possible!” A bigger pivot door leaves a bigger impression! It’s not uncommon for Sing Core pivot doors to stretch from the floor to the ceiling. With our lightweight core, this size is feasible. Choose a front door that’s sure to grab attention!

Pivot Door

Pivot Door

How to Design a Pivot Door

Your pivot door is only limited by your imagination! Sing Core is compatible with any flat building material. With complete customization, you can let your creativity fly! 

Consider your material choice. Consider the weight. Heavier materials make create strain on larger doors. This is especially true when the door is over 8 feet tall or 3.5 feet wide. That’s why Sing Core’s patented lightweight core technology is so important. We have flexibility with our fully insulated lightweight core.

Extra weight can create problems installing your pivot door. Weight is a burden on your door hardware, leading to replacement costs. With Sing Core, your door will remain dimensionally stable and won’t warp, regardless of size.

Will your Pivot Door delaminate, warp, bend, or twist?

Is your large door guaranteed?

In most cases, your large pivot door is excluded from warranty. They’re afraid that your large door might fail. Your door won’t fail with Sing Core! We’re backed by our 50-year Pivot Door Guarantee. 

50-year Door Guarantee

Sing Core’s True Flat Team and your favorite millwork can create a custom pivot door! This Pivot Door is guaranteed to last half a century. Not warping, bending, or twisting. 

 

How to Spec a Pivot Door

Best way to spec your large pivot door is to note that it has to have, “Sing Core inside.”

Sing Core works hand in hand with millworks and custom pivot door manufacturers to create the ultimate pivot door. It starts with Sing Core inside. 

Sing Core is a revolutionary pivot door core. Patented and patent-pending technology created by inventor Peter Sing. The core is a reinforced torsion box, creating a solid composite structure. Lightweight Sing Pivot Doors are insulated, sound-deadening, and custom built. 

Get an Estimate

Visit https://singcore.com/pricing-3/get-an-estimate and get an estimate for your next Door! 

See also: Affordable Pivot Door Evolution

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How to Measure a Warped Door

How can you tell if you have a warped door or not?

There is an industry standard method of determining whether your door is warped or not.

To determine whether you have a warped door or not you will need a length of string (longer than the length or height of your door) and a measuring stick or tape measure.

a) Tape one end of the string to the edge of the door and the other end to the opposite edge of the door.

The string should be straight. If there is a gap between the string and the door’s surface, you may have a warped door.

b) Measure the gap between the string and the door’s surface area.

If the gap is greater than ¼” your door is warped (according to AWI standards for 1-3/8 to 1-3/4 inch doors 3’-0” to 3′-6″ x 7’-0”).

c) If the length exceeds 7 ft. AWI standard applies to any 7 ft. section. Apply string to any 7 ft. span.

Contact your door maintenance company and send them two photos.

d) [1] Photo of the length of the string which shows as much of the door in its entirety, or at least from one end of the string to the other. Then [2] a closeup photo of your measurement of the gap.

Armed with these two photographs, which can easily be emailed to the millwork or door maintenance company of your choice, the recipients will be able to determine how best to approach the repair or replacement of your warped door.

You might consider replacing your warped door with a professional door which has Sing Core inside which can be guaranteed not to warp, bend twist or otherwise fail so as to avoid this pitfall in the future.

For more information, see: Door Warping vs. True Flat

Storing SingCore Doors

After you’ve received your patented Sing products, if you will have to store them prior to finishing and/or installation, try to store them standing upright, on edge, with plenty of space in between, to allow air flow. Do not lean them against a wall. If you must store them stacked, wrap in plastic and place one or two sheets of plywood underneath and on top of the stack of Sing products. This will help keep the entire stack similarly acclimatized while not in use, otherwise, you may have to re acclimatize the top and/or bottom Sing products later, when you are ready to use them.

 

How to Store SingCore Doors

What if my door with Sing Core inside is warped?

The same standard method of determining and measuring any door with Sing Core inside is used just like any other door (as noted above).

Contact Sing Core about your concerns about your door being certain to include the two photos as noted above.

If you have purchased a professional door with Sing Core inside, you may be the recipient of a replacement Sing door.

Note that upon arrival and un-crating of a door with Sing Core inside, a door may appear warped (and indeed it will be measurable). This is normal for a door which has been packed and in transit. Stand your door on its edge at least twelve inches away from any adjoining surface area, allowing it to acclimatize for up to 72 hours. Measure your door again and you will find it to be straight and true. If not, document for warp (as above) and contact Sing Core.

In the event that a professional door with Sing Core inside is warped (which is highly unlikely) your help in determining the cause of the door’s warping is appreciated. Please assist documenting the chain of custody of your professional door with Sing Core inside, including the millwork or door company which finished the door, and the installers who installed the door, to help us insure your replacement door remains warp-free.

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About Sing Core

SingCore panels are engineered with a lightweight, insulated, vertical grain tension box core. Then two skins are adhered to create a panel that’s lighter, stronger, and warp-resistant. Because the strength off our core doesn’t rely on wood, which is a naturally warping material, SingCore panels have a 50 year warp-free guarantee; the only one offered in the industry.

Additionally, SingCore panels are completely customizable, making them perfect for any project.

 

Dimensions

  • Length and Height are based upon your specifications to fit your project’s needs. We can also custom manufacture your panel’s grade, core grid size, skin type, edging, trimming, internal blocking, and thickness. However, the minimum thickness is 3/4″. There is no maximum thickness!

Edging

  • You can order Sing panels with open or closed edges. Ordering your Sing panels with open edges is useful if you intend to work with the panel post-manufacturing. If you prefer closed edges, the skin material will be pressed and glued over a solid wood frame. Unless specified otherwise, edging is 1.25″ solid birch.

Skin Options

  • We provide many different skin options to fit any of your construction needs. This includes Birch, MDF, Mahogany, Fir, Cedar, and even metals like Galvanized Steel. See images of example door skins on our Galleries page.

Trimming

  • Unless otherwise specified, all of our panels are shipped untrimmed. If you need a clean, finished panel on arrival, simply specify in your order. Open edged panels will always include trimmed edges.

Other Specifications: Internal Blocking and Embedded Chases

Many custom projects require specific hardware to be installed in our panels post-production. Therefore, we offer additional wood blocking anywhere within the panel. However, increased amounts of internal wood blocking will increase the weight and the likelihood of warping since wood tends to warp over time.

Custom Sing Panels can be manufactured to your architectural specifications, which may include special chases for plumbers to route hot and cold water feeds or electricians to run electrical wiring through. Since every Sing panel is custom manufactured, we can have your wire chase or plumbing pre-installed within your panels at any specified location.

For any special customization you need for your project, please provide us with detailed specifications and drawings so we can be sure to give you the product that you need!

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Pivot Door Systems

Overcome Pivot Door Challenges with Sing Core’s Pivot Door Systems!  Lightweight, Warp-Free Technology

Sing Core Pivot Door Systems works with top millworks and pivot door companies to create the best pivot doors. Whether your pivot door serves as a grand entry or a showpiece, it makes a bold impression. But doors taller than 7 feet come with unique challenges. These include handling, hardware, and maintenance.

Solution to any of these problems: Sing Core’s Warp-Free Doors with a 50-Year Guarantee
With Sing Core, your doors stay flat no matter the size or environment. In fact, our technology comes with a 50-year warp-free guarantee. As a result, your door stays reliable for decades.

Let’s explore common pivot door issues and see how Sing Core solves them.

Pivot Door Systems

Pivot Door Systems

Problem: Handling Large Pivot Doors

Large pivot doors look stunning. Yet, their size makes every step more difficult. For example, moving them takes special equipment and several people.

Solution: Sing Core Makes Large Doors Easy
With Sing Core, millworks and manufacturers build warp-free pivot doors of any size—even up to 40 feet tall. As a result, our lightweight core simplifies transport and installation. Thanks to Sing Core, massive pivot doors become practical. In addition, every door is proudly made in the USA.

Pivot Door Systems by Sing Core

Pivot Door Systems by Sing Core

Problem: Heavy Pivot Door Systems Raise Costs

Heavy pivot doors are expensive to move and install. As a result, they need more labor and equipment at every stage.

Solution: Lightweight Doors with Sing Core’s Pivot Door Systems
Because Sing Core’s patented core cuts weight, large doors become easy to handle. Lighter doors need fewer workers and lower long-term costs. This includes savings in transportation, installation, and maintenance.

Problem: Heavy-Duty Hardware Costs More

When doors are heavy, they need stronger hardware. For example, specialized hardware can cost more than the door itself.

Solution: Lower Hardware Costs with Lighter Doors
Since Sing Core reduces door weight, lighter and cheaper hardware becomes an option. As a result, you save on upfront costs. In addition, installation and maintenance are much easier.

Problem: Heavy Doors Lead to More Maintenance for Pivot Door Systems

Heavy doors stress hardware and frames over time. They also warp, which causes air leaks and damages seals.

Solution: Minimal Maintenance with Sing Core
Thanks to our warp-free design, Sing Core doors need very little maintenance. While the finish may still need care, hardware repairs are no longer an issue.

Problem: Exterior Pivot Door Systems Warp Easily

Outside doors often warp due to temperature differences. This puts pressure on hardware and frames while breaking seals.

Problem: Pivot Doors Wear Out Quickly

Many pivot doors fail over time. As a result, building owners must replace them. However, finding better replacement doors can be tough.

Solution: Long-Lasting Doors with Sing Core
The key to lasting doors lies in the core. Sing Core doors resist bending and warping. As a result, they stay strong for many years. Whether you need a new door or a replacement, Sing Core offers the best solution. Every door is backed by a 50-year guarantee.

Conclusion: The Best Pivot Doors Start with Sing Core

Pivot doors with Sing Core perform better in every way. They are lighter, need less hardware, require little maintenance, and stay warp-free for 50 years.

Architects, designers, and contractors trust Sing Core for large pivot doors. With Sing Core inside, your door will stay beautiful and functional for many years.

Choose Sing Core for your next pivot door project and experience the difference today. Visit https://singcore.com/pricing-3/get-an-estimate and get an estimate for your next Pivot Door! 

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Sing Door Ship Receive Warp-free Care

Shipping, Receiving, and Care of

Your Warp-free Sing Door

Sing Core only works with the best and most highly proficient millworks and door manufacturers. This segment of the industry is well-versed in how to deal with high-end building materials such as Sing Core. For many years, Sing Core has provided unfailing warp-free solutions to the biggest and best architects and millworks in the world, without one complaint.

As more millworks and smaller door companies are reaching out to offer their clients access to Sing Core, we do occasionally run across industry professionals who are not aware about what to expect or how to handle Sing Core raw materials. Some of these less-experienced, newer and/or smaller millworks and door companies may not know what to expect when dealing with a product like patented Sing Core. We desire to welcome newcomers to have access to patented Sing products. For those, we are providing the following information:

Unfinished

All Sing products are shipped as unfinished to the millworks and door companies who are highly proficient in working with high-end materials such as Sing Core. A Sing door blank is not a ready-to-install door and are not available from the factory with hardware or as pre-hung doors. Sing Core works in tandem with the industry professionals and the factory may, or may not, handle some of the detail works, such as applying exterior skins to the door blank. The door finishing, hardware, framing, and installation are all coordinated before your Sing door blank is built.

Packaging and Shipping

Sing products tend to be very large in size and require custom crating to assure they are not damaged in shipment to the industry professionals. Even with the best efforts of Sing Core’s custom crating team, sometimes a Sing product may arrive blemished and/or damaged by the shippers entrusted with the handling of crated Sing materials. In most, if not all, cases the level of structural integrity of Sing products in combination with the high level of proficiency of the finishers receiving Sing products, even damaged Sing Core can easily be returned to new condition, even if mishandled or damaged in shipment.

Arrival of Sing Products

Upon arrival of Sing products, be prepared to receive an unfinished product via truck. Offloading may require a forklift and dock for receipt. That said, there will be work that needs to be done to the product received by the millwork or door company before it is retail-ready.

Acclimatization

In most cases, when receiving a multiple Sing Core order, where Sing door blanks have been shipped in a stack, or side by side, it is perfectly normal for even a warp-free door blank to appear to be warped upon receipt. Usually, the Sing door blank(s) which face the outside of the crate, or the top of a stack of warp-free door blanks will appear to be warped. By acclimatizing these doors, they will straighten out to their straight and true flat appearance.

To acclimatize your Sing door core, stand your door on its edge at least twelve inches away from any adjoining surface area, allowing it to acclimate for up to 72 hours. Measure your door again and you will find it to be straight and true. If not, document for warp and contact Sing Core.

Panels must be sealed or painted before being hung to prevent warp.

Panels must be protected from weather exposure with overhang, sealing, or cladding to prevent warp.

Storage

After you’ve received your patented Sing products, in the event that you will have to store them prior to finishing and/or installation, try to store them standing upright, on end, with plenty of space in between. Do not lean Sing products against a wall. If you have to store them stacked, wrap in plastic and place one or two sheets of plywood underneath and on top of the stack of Sing products. This will help keep the entire stack similarly acclimatized while not in use, otherwise, you may have to re acclimatize the top and/or bottom Sing products later, when you are ready to use them.

Door Warp Definition

Door warp is a variation from a plane surface within the door itself. It does not refer to the door in relation to the frame or jamb in which it was hung. Bow, cup, and twist are terms which describe warp in a door and are defined as follows: Bow is a curvature along the door height, or a deviation from a flat plane from end to end. Cup is a curvature across the door width or a deviation from a flat plane from side to side. Twist is a distortion in which one corner is out of the plane of the other three corners. Warp is usually a result of unequal stresses within the door from one face to the other caused by changes in humidity and temperature conditions or uneven conditions from one face to the other. Buildings shall be humidity and temperature controlled before doors are delivered and installed. Required conditions are 25% to 55% relative humidity and 50° to 90° F (10° to 32° C) temperature range. Improper handling, stacking, and storage can also contribute to warp. Doors shall be stored flat on a level surface off the floor with cross supports.

HOW TO MEASURE WARP

Use a taut string or straight-edge and measure on the concave face of door – diagonally, horizontally, or vertically. Measure at the point of maximum distance between the taut string or straight-edge and the face of the door.

Measurement must be made on the concave face of the door. Door shall be open when measuring for warp (lock not latched into strike). One person can measure warp using a string and taping one or both ends onto the face of the door, holding it taut. Don’t measure warp in relationship to the door frame. Often a door may not fit into the frame properly but is not warped. In these cases, check the frame – it must be set plumb and square and jambs must not be twisted or out of alignment. Action on any claim for warp may be deferred for up to one year after project completion to permit doors to acclimate to temperature and humidity conditions.
 

ALLOWABLE WARP TOLERANCE
FOR WOOD DOORS

1-3/4 inch (44 mm) or thicker doors:

  • 3’-6” x 7’-0” (1050 mm x 2100 mm) or smaller, 1/4 inch (6.4 mm) maximum.
  • Larger than 3’-6” x 7’-0” (1050 mm x 2100 mm), 1/4 inch (6.4 mm) maximum in any 3’-6” x 7’-0” (1050 mm x 2100 mm) section.

1-3/8 inch (35 mm) doors:

  • 3’-0” x 7’-0” (900 mm x 2100 mm) or smaller, 1/4 inch (6.4 mm) maximum.
  • Larger sizes not addressed in this standard

Warp-free definition: Doors with patented professional SingCore inside outperform any other Eco-friendly door in the world in terms of being lightweight (SingCore weight is approximately 10 % of solid wood, timber or plywood core) and high strength (660 PSI+, stronger than steel pound-for-pound). No other door Eco-friendly door made in the USA can reach our high precision (SingCore approximately +/- .006 inch) or flatness meets or exceeds door industry allowance for door warp, as seen above). We guarantee no other Eco-friendly, lightweight, high-strength insulated door can compare with any door that has patented professional Sing Core inside. SingCore is raising the standard of what is possible in terms of building large doors that can be true flat and warp-free.

How can you tell if you have a warped door or not?

There is an industry standard method of determining whether your door is warped or not.

To determine whether you have a warped door or not you will need a length of string (longer than the length or height of your door) and a measuring stick or tape measure.

a) Tape one end of the string to the edge of the door and the other end to the opposite edge of the door.

The string should be straight. If there is a gap between the string and the door’s surface, you may have a warped door.

b) Measure the gap between the string and the door’s surface area.

If the gap is greater than ¼” your door is warped (according to AWI standards for 1-3/8 to 1-3/4 inch doors 3’-0” to 3′-6″ x 7’-0”).

c) If the length exceeds 7 ft. AWI standard applies to any 7 ft. section. Apply string to any 7 ft. span.

Contact your door maintenance company and send them two photos.

d) [1] Photo of the length of the string which shows as much of the door in its entirety, or at least from one end of the string to the other. Then [2] a closeup photo of your measurement of the gap.

Armed with these two photographs, which can easily be emailed to the millwork or door maintenance company of your choice, the recipients will be able to determine how best to approach the repair or replacement of your warped door.

You might consider replacing your warped door with a professional door which has Sing Core inside which can be guaranteed not to warp, bend twist or otherwise fail so as to avoid this pitfall in the future.

For more information, see: Door Warping vs. True Flat

What if my door with Sing Core inside is warped?

The same standard method of determining and measuring any door with Sing Core inside is used just like any other door (as noted above).

Contact Sing Core about your concerns about your door being certain to include the two photos as noted above.

If you have purchased a professional door with Sing Core inside, you may be the recipient of a replacement Sing door.

Note that upon arrival and un-crating of a door with Sing Core inside, a door may appear warped (and indeed it will be measurable). This is normal for a door which has been packed and in transit. Stand your door on its edge at least twelve inches away from any adjoining surface area, allowing it to acclimatize for up to 72 hours. Measure your door again and you will find it to be straight and true. If not, document for warp (as above) and contact Sing Core.

In the event that a professional door with Sing Core inside is warped (which is highly unlikely) your help in determining the cause of the door’s warping is appreciated. Please assist documenting the chain of custody of your professional door with Sing Core inside, including the millwork or door company which finished the door, and the installers who installed the door, to help us insure your replacement door remains warp-free.

See Also: Sing Core Definition of Terms

 

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Sing Core Definition of Terms

Acclimatization

Sing Core panels acclimatizing: According to the type of the skin. Aluminum, metal, plastic skin, concrete, and ceramic skin will be delivered in perfectly straight condition without any acclimatizing. Plywood, hardboard, and HPL will take much less time to acclimatize than MDF. The best way to acclimatize is stand panels on edge with 4” or more of equal spacing between each panel.

Eco-friendly

Contrarian Sing Core purports to introduce a new degree of Eco-friendliness in sustainable building materials, not expendable and disposable import products which dominate the present day architectural landscape. Sing Core is ecologically conscious throughout its Made in the USA manufacturing process. The factory expends very little energy, local manpower, to manufacture Sing Core which is built from the smart use of a combination of natural wood resources, insulation and formaldehyde-free adhesives in the non toxic manufacturing process of the sustainable lightweight and high strength building material designed to last for centuries.

Edges

Edges of Sing Panels can have a variety of options. They can be open-faced (no edges) which means the patented Sing core material would be exposed and visible from the edge, between the two surface materials (skins). Edges can be embedded and pre-sealed between the surface skins per specification. Standard edging is 1.25 inches solid wood. Edge-banding is commonly applied by millwork or other finishing agent.

Embedded Chases

Chases or channels for cable, electrical or other services (such as water) can be pre-installed to specifications during the manufacture of your Sing Panels. Contact your Architect or Sing Representative to make certain your embedded chases are manufactured to meet your needs or specifications in advance.

 

High Strength

Even though extremely light in weight compared to other lightweight honeycomb and/or substrates, patented Sing Core was independently tested for structure strength and rated at 660 PSI (which can achieve higher ratings, if necessary for your specs) making it stronger than steel pound for pound. Other lightweight materials have structure strength of 10 to 110 PSI. This is what gives patented Sing Core its stellar reputation for high strength with little or no deflection over long spans with little substructure.

Insulation

The otherwise left empty voids in traditional torsion box is filled with rigid insulation material which serves as rigid material which shores up the vertical grain torsion box walls imbuing patented Sing Core with its unparalleled structure strength, while adding insulation qualities of climate control (R-value) and sound deadening (STC-rating*) attributes. The insulation used inside the Sing Core torsion box structure grids can be altered to meet architectural specifications and/or performance expectations.

Internal Blocking

Internal blocking or solid implants can be strategically placed inside your Sing Panel or door blanks per your specifications. Please double-check your specs prior to having your Sing Panels or door blanks manufactured.

Large Door

Where Sing Core shines in the door industry is in the ability to provide a lightweight high-strength door blank to door manufacturers and millworks for doors over 7 ft. tall and 3.5 ft. wide that will not warp. Solving not only issues associated with door warp, but also minimizing the weight of large doors without compromising strength. How large can a door be with Sing Core inside? Sing Core can build large door blanks in nearly any size up to 50 ft. tall and/or 50 ft. wide, or more.

Lightweight

The average weight of a Sing panel is 1/2 pound to 2 pounds per square foot. Weight is determined by many factors including torsion box grid size, rigid insulation material and glue used as well as other components of the panel’s composition including patent pending professional warp-free stiffeners, surface materials (sins) and adhesives used in the manufacturing process. Your architect or Sing representative can present you with a projected weight estimate prior to manufacture.

Paint Grade

We deliver your panels as unfinished “paint grade” as opposed to paint ready. Under normal circumstances, Sing panels and door blanks are provided as paint grade to millworks and door manufacturers who prepare the surface area for paint if necessary or required. If you require paint ready Sing panels or door blanks be certain to specify expectations prior to manufacture.

Post and Beam

Post and beam is only represents the depiction of a specific dimensional characteristic of an otherwise normal Sing panel, where its dimensions dictate the proportions and function of it as a post or beam. When used as posts and/or beams, Sing Core offers unique advantages over traditional wood and/or metal posts and beams.

Professional Grade

Professional grade panels can be guaranteed warp-free for 50 years. Composite stiffener technology is integrated with the structural core, which prevents warping and provides a truly flat panel. Professional grade panels provide a 50-year non warp guarantee when used in appropriate applications.

RSIP

A Sing panel is classified as a Reinforced Structural Insulated Panel (RSIP) due to its underlying reinforced torsion box grids which is the heart and soul of patented Sing Core.
Sing Core

Patented Sing Core is the key to the success of Eco-friendly, lightweight, high-strength Sing products. The specifics of the design features small (2 inch to three inch) vertical wood grain torsion box grids where the voids (which would otherwise be left open) are filled wall to wall with rigid insulation material. This core material is sandwiched between two surface skins and may (or may not) be framed with wood or an alternate framing material inside the exterior stress skins.

Sing Panel

A Sing Panel consists of a substrate of patented Sing Core sandwiched between two stress skins of any available flat building material which may or may not feature exposed edges or closed (framed edges).

Size

The dimensions determining the size of any patented Sing product are determined by architectural specifications and include: length or height x width x thickness (in inches). These dimension are necessary for a preliminary price quote.

Skin

Skin refers to the flat building material that acts as the stress skin for completing the reinforced torsion box design. While the core supplies the vertical torsion box walls, the exterior stress skins seal the top and bottom of all interior boxes. Skins can be made of any flat building material including any available species of natural wood, aluminum, concrete, fiberglass/FRP, Kevlar, LVL, MDF, Metal, Steel, etc… These skins are adhered in an Eco-friendly manner using formaldehyde-free glue, cold pressed with very little energy expended and little no toxic fumes or unnecessary waste.

 

Storage and Protection

Store your Sing Core door in an upright position and allow to acclimate to room temperature following shipment receipt or prior to finishing or installation.

Strength of Sing Core

The strength depends on the thickness of the panel. For instance, if you double the thickness it will be 4 times the strength. The thickness of the skin could make up the extra strength but increasing the thickness to gain strength will result in added weight, which may compromise the end result. The answer is usually a combination of matching the right Sing Core width with the appropriate surface material to achieve the desired results without loss of structural integrity or unnecessary additional weight.

Structure Warranty

The structure warranty that accompanies professional grade or hot press ready grade Sing panels or door blanks warrants your Sing product against structure failure. Also ensures that your Sing products are not disposable, are reusable and can easily be repaired if damaged, often on site without disassembling using regular woodworking skills and tools.

Thickness

When Sing Core representatives reference the thickness of a Sing panel or door blank, it generally includes the thickness of the Sing Core insulated reinforced torsion box core, as well as the thickness of the exterior surface materials (skins) included.

 

Trade Professional

Sing Core only supplies their patented material to trade professionals, like architects, cabinet makers, millworks and door manufacturers. Sing Core does not offer materials for retail. If you are a home owner who desires to have Sing Core products incorporated in your home, contact your local trade professional (architect, contractor, builder, cabinet maker, manufacturer or door company) for more information. As you know, we do not ship finished materials and only ship to authorized finishing facilities (millworks) who are responsible for finishing your Sing products. These are the people that make us look so good.

Trimmed / Untrimmed

The default condition of Sing products is normally untrimmed. This means your sing products will arrive at your millwork or finisher with unfinished, untrimmed edges and exposed glue may be visible from the edges of the Sing panel or door blank. Alternatively, your Sing panels or door blanks can be trimmed by request, leaving a clean, smooth finish on the edges. Allow ¼ inch for trimming, if requested to be completed prior to shipping from Sing Core. Be certain to specify “trimmed” when ordering your Sing products, as they will have to be build oversized to allow for the ¼ trimming.

True Flat

True flat is what Sing clients have referred to Sing products as. It is not an industry term, but it did become common vernacular in reference to Sing products which outperform any known lightweight, structurally strong product in terms of flatness or lack of deflection under load and among long spans. True flat is considered proprietary nomenclature and does not have a scientific definition or industry-wide classification because nothing compares to Sing Core in terms of Eco-friendly, lightweight and high strength.

Turnaround Time

The standard turnaround time for Sing products is approximately four to eight weeks, so take this into consideration when you are ordering your Sing products. In a hurry? Check with your Sing representative, rush service may be available for an additional fee.

Unfinished

The standard condition for delivery of Sing products is, “Unfinished.” That is to say Sing products are not manufactured to be an end-sale product. Sing Core’s standard method of operation includes wholesaling and shipping Sing products to millworks, cabinet shops, finishers or door manufacturers who complete the process and ready the items for installation or resale. Sing products are not retail-ready and not available directly to consumers.

Warp-Free

Warp-free is the Sing Core promise for the condition of professional Sing panels which are built for specific purposes and high precision expectations. Professional grade Sing products are a concerted effort of the designers , architects and the True Flat team at Sign Core to create a Sing panel or door blank that will endure the environment and circumstances facing the regular use of said panel or door over a 50-year lifespan. A professional Sing panel built to these specifications and used for its prescribed conditions can be delivered wit an accompanied hard copy signed certificate insuring the product to be guaranteed to remain warp-free for 50 years.

Wood Stave

Wood staves (a narrow length of natural wood “stave” with a slightly beveled edge) can be utilized to form the exterior of Sing Core panels or door blanks. These can be used to replace other types of solid wood building materials. Natural wood stave species are subject to availability. Standard wood stave exterior measures 1/8 inch and is available in other thicknesses according to architectural design and specifications.

 

* Note: STC rating varies according to size, thickness, skin, and other factors. Sing Core does not rate doors, although we are fortunate enough to have one of the best sound testing labs in the world, here in the Pacific Northwest. If you require a specific STC rating, Sing Core can build a door to your architectural specifications and have the resulting door tested at our rating facility for an official rating.