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See Our Barn Door Rennovation At A Million Dollar Home

The Best Doors Are Made Here…

When looking for doors or panels, you should be looking for the best that your money can buy.  SingCore! Handmade right here in America, our panels can save you time and money.  For the most younique portal experience. you can expect the best of all worlds by using our panels.

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The best contract with SingCore for all of their large panels.

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Sing Overhead Aluminum Roll-up Door

Introducing Sing Overhead Aluminum Roll-up Door

 

Sing Overhead Aluminum Roll-up Doors are your ideal solution for freight doors for your entire fleet.

Industry Challenges

The challenge with roll-up freight doors used in commercial applications is that they are big and heavy, which means they are difficult to operate and add significant weight to the load.  Since trucks loads are limited by weight capacity, a heavy door means you can carry fewer packages per load.  These types of doors also tend to be very costly.  Companies that manufacture roll-up doors produce products that are unnecessarily complex, resulting in products that are far too costly.  This can result in huge cost overages, which can severely hamper your bottom line.  Another problem with most cargo roll-up doors is that they are very difficult to install.  Because their products use so many different complicated parts, they can be extremely difficult to install.  This will result in increased labor requirements and cost overruns.  Lastly, truck doors have been highly susceptible to environmental damage from water and UV rays.  UV rays are an excessive problems for standard freight truck overhead roll-up doors.  UV rays will significantly decrease the life of your doors.  Another challenge is doors that are weak and won’t hold up under rigorous, industrial use.  Ever notice how most metal freight doors are dented, bent, and crushed?  Those types of doors do not have a pleasant appearance.  They will also not function well in the long run.

 

One-stop Solution

SingCore has solved all of the problems of large overhead roll-up freight doors with our Sing Overhead Aluminum Roll-up Door designed for heavy duty rigorous use in trucking and freight applications.  Your simple solution to easy freight loading and transport.

Super Light Weight
Ultra High Strength
Easy to Install
More Functional
Cost Effective
Better Safety
Universal Track System
Visually Appealing

Super Light Weight

Sing Overhead Aluminum Roll-up Doors are the lightest weight truck freight doors on the market, our doors mount on universal truck roll-up door tracks, so you won’t need any special mechanisms that add weight to your installation.  Our door panels are lighter.  You will save around 100 pounds from your load, which means you have more capacity for your freight.  In turn, you will earn more money.  Lighter weight means our doors are less taxing on your hardware and your track systems.  They also require less expensive hardware to install and are easier to operate.

Ultra High Strength

Often, you will see truck cargo doors on the road and they are dented and bent.  This is because they are not built to tolerances meant to withstand the rigorous use freight doors must undergo to meet the needs of shipping and transport companies.  The secret to making the highest strength panels on the market has to do with SingCore patented and patent pending SingCore material.  With SingCore inside, we can make you the strongest Overhead Aluminum Roll-up Cargo Doors on the market.  Our doors are designed to hold up under the most rigorous conditions.

 

Easy to Install

Because our doors are the lightest weight on the market, they are easier to transport, lift, and install.  This means you need less manpower and less expenses to complete your installation.  Moreover, you need no special tools.  All you need is a wrench and a screw driver.  The panels are so light weight, they can be easily lifted with just one finger.  They require less hardware.  Thus, there are fewer parts to assemble.  All of this results in the fastest, easiest to install overhead roll-up freight door system on the market.

Weather Resistant

Our doors hold up far better than wood overhead roll-up doors because they’re skinned with aluminum.  Plywood doors tend to allow water to seep in and destroy the integrity of the door.  We also use a special design to prevent water from seeping in around the edges.  Sing Aluminum Overhead Roll-up Freight Doors are designed to withstand all sorts of environmental conditions.  If used carefully, these may be the only doors you will need in the lifetime of your truck!

More Functional

Because of the light weight, sturdy nature of our panels, no door on the market functions as easily as ours.  Our doors can commonly be opened with just one finger.  You will not find another one finger opener on the market.  They are so light weight, children and elderly folks can open them with ease.  Because of this, you will expend less energy opening our doors.  You will be able to save more energy to actually unload your cargo.

Cost Effective

Most overhead roll-up freight doors are hugely expensive ranging from $1,200.00 to several thousand.  Sing Aluminum Overhead Roll-up Freight Doors are more affordable and more functional than any other system on the market.  Our system is simple and uses less hardware, so it saves you considerable money on the expensive hardware used with competing systems.  Because our doors are so much more reliable, sturdy, and long-lasting than competing product, we save you from the high cost of replacing your doors on a frequent basis.  Moreover, our doors are less costly out of the gate because of our low price.  Lastly, with our special pricing, you will be able to outfit your whole fleet at a fraction of the cost from our competitors.

Better Safety

Lighter doors mean better safety.  Heavier doors are more difficult to operate, especially when used in overhead situations.  They can come crashing down and smash or cut off fingers.  They can cut off and crush limbs.  You can pull muscles, break arms or legs.  You can even break your back on large doors.  Light doors means easy operation.  It means you will minimize your chance of injuring your joints, arms, and back.

Universal Track System

Sing Overhead Aluminum Roll-up Freight Door system works with standard freight door track systems, so you don’t have to install new tracks or seek any addition hardware for adapting to our doors.  Simply remove your old doors and install our doors on your existing tracks.  You can even use your existing hardware with our doors.  You can accommodate almost any hardware.

Visually Appealing

It has been said that our doors have a stunning appearance.  You be the judge.  For a low price, you can purchase our doors and see how beautiful they are.  They can be painted in any cover or treated.  You can even apply your own customer graphics to our panels.  We can even make you a door with an amazing aluminum finish or anodized aluminum for one of the most visually appealing overhead roll-up freight truck doors on the market.

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Sing Core Patented Modular Large Door System

Sing Core Patented Modular Large Door System

Massive Sliding Door, 25′ x 9′ x 2″, can be easily transported and joined on site.

Transporting, moving, managing, and installing large doors on site has always been a tremendous task.  Often your clients call for large doors installed in the most inconvenient locations, on the top floor of a house, or in the penthouse suite of a building with no elevator.  Your crew may need to carry large doors up multiple flights of stairs.

Revolutionary modular door joining system!

Our system is so great , you will not find any other system that allows you to move your panels on site with ease.  Even carrying your panels up the stairs is easy with our system.  You will our system allows you to run crew the fraction the size of a conventional crew, because transporting and assembling our panels is so easy.

Large Modular Patented and Patent Pending Biscuit System

Sing Core Has the Solution

Our Patented system provides you with the easiest, most secure modular door system that allows you to achieve any size door, because you can transport your doors onto the job site in sections.  That way, you save money by hiring a smaller crew and purchasing less equipment heavy equipment for moving and loading panels and doors.  Sing Core provides you with the only door system which allows you to achieve large, even huge, modular sliding, pivot, or pocket doors that are just as stable as doors made in one piece.

Modular Door System Simple Easy Stable
Hands down, the quickest, easiest, most stable door joining system

Sing Core Features List Check Strong LightStrong – Pound for pound, stronger than steel

Sing Core Features List Check Strong Light

Light Weight – Up to 80% lighter than comparable sized doors

Sing Core Features List Check Strong Light

Warp Free – Better than AWI Standards

Sing Core Features List Check Strong Light

Guaranteed – Our Professional Panels are guaranteed warp-free for 50 years

Sing Core Features List Check Strong Light

Visual Appeal – Our products can accommodate any skin

Sing Core Features List Check Strong Light

Custom Made – We build precisely to your specifications

Sing Core Features List Check Strong Light

Perfectly Straight, from Start to Finish

 

Many manufacturers shy away from larger sized doors, because of their propensity to warp.  The larger the door, the more innovative the design must be to prevent doors from warping and skewing.  If your doors warp or skew, they may cease to function as doors.  Sliding doors, pivot doors, and pocket doors have an obligation to be extremely straight, because the hardware requires this to function properly.

Strong, light weight, perfect straight doors, guaranteed for 50 years!

That is why we build our panels to the absolute highest precision possible, within tolerances of +/- .006 inches.  With our doors, you can rest assured that your openings will be functional for decades and decades to come.

 

 

 

Any Size Door

Because you  can join our panels, you can build much wider or taller doors than ever before.  Your imagination is your limit.  If you want a wider door, simply order more sections.  Transportation is much easier, and they can be joined on site with no expertise.

Sing Core make it possible for you to build doors you absolutely never thought possible before with our revolutionary patented and patent pending Large Modular Door System.

 

Large Sliding Door Mural Strong Light Warp Free
Beautiful Large Sliding Doors with murals are more popular than ever before.

Built to Your Exact Specifications

Sing Core has made the process of ordering so simple.  All you have to do is click the orange “Pricing” button on any page of the Sing Core website.  You will receive a price estimate with48 hours of submitting.  Just plug in your specifications.  We make the doors and panels exactly how you want them.  The moment you make the down payment, we do everything for you, including the shop drawings. 

No other large door system

No other door system on the market allows such easy on site assembly.

Made with Any Skin

We can ship your door panels with any  skin.  One popular feature among our customers is that you can order our panels with so many more skins than most other businesses can provide.  Our customers rely on us to bring them the ultimate visual appeal.  We have had all kinds of requests for different types of skins.  Among them are Mahogany, White Oak, Hemlock, Fir, Cedar, Alder, Maple, Walnut, Ash, bamboo, Eucalyptus, Teak, Acacia, Cocobolo, Bocote, and more.  We can also supply you with Luan Meranti Marine Ply. AB Ply, MDO, or MDF substrate ready for you to prep, prime, and paint.  We can also apply FRP fiberglass.

any door skin hard wood metal aluminum
Order your doors with any wood or metal skin

More popular options are our HPL Laminate, Formica, or Masonite.  Click here for more information about our wide variety of skins.

 

Hand Made and Guaranteed

Certrified Professional Sing PanelIn this day of outsourcing and importing, very few products in America are truly hand made anymore.  American products are well known for their exceptional quality and precision.  Sing Core products are the pinnacle of that philosophy, bringing you top of the line panels that are 100% handmade in the USA, using materials that are nearly 100% sourced from America.         

 

Sing Core is Proudly Made in America
Sing Core is 100% handmade in America
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We Apologize

We are sorry you were contacted in a manner which was not relevant or with information which was not a good fit for you.

It is our desire to only provide you with the best experience when hearing from us, here at Sing Core.

If you would like not to ever hear from us again, simply provide your contact details below and we will remove you from our system.

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As always, we protect your information and will not disclose your contact details to anyone.

Thank you for trusting Sing Core,

~ Peter Sing

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The Best Large Doors in the World

Built to last centuries, guaranteed for 50 years

 

 

Sing Core helps the best door companies, architects, and millworks build the best doors.  Doors with Sing Core inside are built to last centuries, and they are guaranteed for 50 years.

 

We are proud to provide one of the longest lists of happy customers in the world.  All of those customers now possess the most prestigious large size doors, which are guaranteed not to warp, bend, twist, or otherwise fail for 50 years.

 

The most successful, biggest, best, and most well-known door companies and millworks in America rely on Sing Core to provide them with the lightweight warp-free door cores that can support extreme over-sized doors, accommodate added materials (for sound proofing or fire rating), and offer strength ratings which are, pound for pound, stronger than steel.

Sing Core could not make such claims, unless we backed up our words with the highest performance results in the industry.

 

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You can rest assured that your door with Sing Core inside will forever be the best investment you will make, with many years of sustained performance and sustainability.

Eco-friendly Sing Core is fully insulated for sound deadening and climate control.

 

 

 

 

 

The best doors in the world have Sing Core inside

 

 

 

 

When you’re looking at an extravagant large pivot door, sliding door, pocket door, or an elegant French door that towers over your head, remember that we don’t build doors.

 

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We get calls everyday from homeowners wanting to add Sing Doors to their own homes, magnificent over-sized, large doors like the ones they see on our Website or in the most luxurious, over the top, locations all over the world, where Sing Core doors have been finished and installed. We do not do this, because we do not finish or install the doors. Only the best door companies in the world do this. You need to contact your favorite door company.

What we do is to supply the best millworks and door manufacturers, and the most prestigious architects in the United States with our handcrafted warp-free custom door blanks, ready to finish and install.  Their expert finishing touches are a major part of why doors with Sing Core Inside look so beautiful.  Without their expertise, Sing Core looks just like plain wood panel.

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Homeowners who would like Sing Core doors in their own homes can contact an architect or millwork to order, finish, and install the doors for them.

 

 

 

 

What Makes Sing Core Doors Different?

 

 

 

We have the best patented and patent-pending methods to create the largest, most lightweight, most insulated Eco-friendly most doors that can be guaranteed not to warp, bend, twist, or otherwise fail for 50 years.  Sing Core uses the only door manufacturing methods which can deliver these extreme results in the largest, most high precision modern doors featuring any contemporary material, because conventional large wood grain doors are prone to warping and a host of other problems, including excess weight.

 

 

 

 

How Do You Build a Sing Door?

 

 

 

 

If you’re a custom door manufacturer, you start with a Sing Core door blank and build your large pivot door, large sliding door, large pocket door, or huge French door just like you would any other door that you build. Having Sing Core warp-free door substrate inside your door makes all the difference in the world.

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Our modular door system is by far the best in the world!

 

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Before finishing

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We aren’t able to show the final door because of copyright information.

 

One of a Kind Sing Doors

 

 

 

Keep in mind that no two doors with Sing Core inside are exactly the same (except in the case of large bulk door orders).

Every door with Sing Core inside features a uniquely engineered base door material which is manufactured to exacting standards taking into account all the details of the application associated with each door.

 

 

 

Attention to Detail

 

 

 

Attention to detail is the method of ensuring that each Sing Door can be guaranteed for flawless performance and longevity by taking into account where the door will reside when it is installed. What will the climate conditions be? Will it be installed inside, outdoors, or will it be a front door with one side exposed to the elements and the other to the structure’s interior?

 

Will your large exterior door be facing North, South, East, or West? What materials will be used on the exterior of the door? Will the surface material need to match other doors featured in the project?

Large over-sized wooden doors present their own set of challenges because every different species of wood grain has its own propensity to shift with changes environmental changes, like temperature and humidity.  Sing Core inside as well as the stiffening and anti-warp configuration in the door substrate will have to be uniquely matched to any difference in door size.

 

 

 

 

Sing Core is not a one size fits all solution

 

 

 

 

That’s why you find Sing Doors featured inside the most expensive homes, commercial, and industrial locations in the United States and around the world.

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It’s no easy job to make a warp-free large door, especially if it is door of enormous proportion which needs to remain dimensionally stable and warp-free over time, but as the most prestigious millworks and custom door manufacturers already know, Sing Core is the only way these results can be achieved.

 

 

 

 

Sing Core Solved the Problem

 

 

 

 

Sing Core has solved all of the problems associated with manufacturing large over-sized doors of all kinds.  Door designers and engineers no longer have to deal with the problems of weight to strength ratios, or having to worry about how to transport, handle, or install large heavy doors.

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Doors with Sing Core inside are not only lighter in weight than other solid core doors but they are high precision (hosting .006 inch tolerances) and stronger than steel (660 PSI or more) pound for pound.

 

 

 

 

How Can You Get a Sing Door?

 

 

 

 

All you have to do is to go to your favorite custom door manufacturer or local millwork and tell them what kind of door you want being sure to tell them you want,

 

 

 

 

 

“Sing Core inside your door.”

 

 

 

 

 

We will work with them hand-in-hand to design the perfect door to your specifications.

 

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With Sing Core
You Can Have Your
Dream Door

 

 

 

Make your door dreams come true with Sing Core inside your door.

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The Most Extreme Doors in the World by Sing Core

Sing Core has been making doors for nearly 15 years.  During that time, we have made big and small doors, high and low, made of the best materials available on the market, built to last a lifetime, guaranteed to be warp free, according to AWI standards.  Without a doubt, every door that comes through our factory is a work of art, but there are a number of doors which have exceeded all expectations to become some of the most extreme doors ever made.

 The Most Extreme Doors in the World by Sing Core

Many doors have made it into the Sing Core Hall of Fame, but today let’s focus on a few of the most impressive doors.

 

 Sliding Doors

Tech Giant Huge Sliding Door

25-Foot-Door-Unfinished-large-huge-sliding-door-scale

We were approached by one of the leading door and windows companies in the world, Cascade Door and Hardware to make this door that nobody deemed was even possible.  With a span of 25 feet wide and a towering height of 9 feet tall, this door is, hands down, one of the largest doors in the world.

humongous giant sliding door finished

We were approached by a tech industry leader to accomplish a task known most often in the industry as “mission impossible.”  We rose to the challenge, because we knew we could do it. This door is stronger, straighter, lighter in weight than any other door of its size in the world. Only Sing Core can do this!

We have solved all the problems with large doors, because our patented and patent pending special construction methods allow us to manufacture doors that are stronger, straighter, lighter in weight, and warp free according to AWI standards.

Joining Panels to make huge doors

With our large Modular Door System you can transport multiple panels into difficult to reach areas of a work site, then join them together to make humongous doors that appear virtually seamless and function as single, complete functioning doors.  You’ve never seen anything like this before, because no other door manufacturer can do this!

This huge, 25 foot sliding door can be easily transported and moved with just two people

 When you need the biggest and the best, only Sing Core will do!

 

Pivot Doors

 Amazing Beverly Hills Pivoter

Magnificent Beverly Hills Pivot Door

OB Williams needed the best door he could get his hands on, when he was working on the most beautiful homes in Beverly Hills.  If you live in Beverly Hills, you need the best possible doors to represent your image, because unimpressive doors will damage your status.  Not only are Sing Core doors the strongest in their weight class, they are also up to 80% lighter than solid wood doors.  Moreover, they are warp free and eco-friendly, and far more visually appealing than competing doors.  They can also be made in any size with any skin.

Magnificent Beverly Hills Pivot Doors, Images Courtesy of Troy Adams

 

Doors are one of the most important elements of design when building the most high end residential homes.  They must be strong, light weight, and warp free, according to AWI standard.  Because of our  unique patented and patent pending designs, our doors can be made with extreme precision, within tolerances of +/- .006 of an inch.  No one else can do this!  In the door manufacturing industry.  This kind of door is often called “mission impossible” and is selected by the most prestigious architects and designers in the world.

 

 


AIA Seattle Design Center Giant Pivot Doors

AIA Seattle Design Center Giant Pivot Room Dividers

FAIA Mr. Peterson, a senior architect for Suyama Peterson Deguchi, called on Sing Core to make these huge pivot man doors for the AIA Seattle Design Center remodel.  They needed doors that were extremely strong, yet light weight enough to work with their specialized door hardware.  Their idea was to create a gallery that could be instantly converted into a conference area.  Sing Core patented and patent pending technology made this possible by using our ultra light weight, high strength design.

Without Suyama Peterson Deguchi and Sing Core, AIA would not have been able to accomplish their tasks of converting their office space into a unique, convenient, practical, world-class conference room, gallery rife with style and elegance.

Suyama Peterson Deguchi Large AIA Pivot Doors

aia seattle doors

Terminal C-18 Film Screening Room, Minneapolis, Minnesota

The C-18 in Minneapolis, Minnesota Airport needed a double purpose wall, one side for their art exhibit, the other side for their quiet theater screen viewing room.  The problem was that these walls needed to open and close to allow access the the foyer area. 

Minneapolis C-18 Airport from outside of the quiet screening room

Terminal C-18 knew there was only one company they could count on to get the job right.  Sing Core rose to the occasion.   

The panels we manufactured and provided by far exceeded their expectations.

Photo Courtesy of Minneapolis Airport
Inside view of the C-18 quiet screening room

Sing Core has helped to create a better environment for everyone at Minneapolis Airport, because we can make our panels stronger, straighter, lighter, and more warp free than the competition.  

Curved Architectural Doors


12 ft. Tall Walnut Pivot Door

12′ Tall Walnut Wood Stave Pivot Door

12′ Tall Walnut Pivot Door Only 177 lbs

Pivot Door Gallery

Miller Blaker 16 Foot Tall Pivot

Miller Blaker came to us with one of the most challenging jobs in the entire world.  They needed doors high quality enough to install on the top floor of the most prestigious building in the world.  They came to Sing Core, because they knew our proven track records of building doors that are not only best in their class in terms of structural stability and strength, but also light weight enough to hang on Miller Blaker’s hardware of choice.  

No one else can achieve the dimensional stability Sing Core can.

These doors had to be perfectly straight, dimensionally stable, and incredibly strong for use in such a challenging scenario.  Miller Blaker required doors that were 16 feet tall, 3 feet wide, yet only 2.25 inches thick.  Often these kinds of dimensions are what industry professionals call “mission impossible.”  Here’s at Sing Core, we make the impossible possible.

Moreover, we built these doors with a solid oak edge that makes the entire door appear like solid wood with no seam.  Only Sing Core can do this!

The best doors made with the best materials.

When Miller Blaker came to Sing Core, what we ended up with was a winning combination all around, one of the best architects in the world, paired with the best materials in the world, for doors that would end up in one of the best locations in the entire world.

 

21 Foot Tall Steel Pivot Door

One of the leading design firms in the country needed a very special door for one of their best customers.  They needed a door that was not only strong, but also straight because of the sheer height of the door. This door measures a whopping 21 foot tall, making it one of the world’s tallest pivot doors ever made.   Not only did this door need exceptional strength and warp free, but also, because of the magnificent size, it had to be extremely light in weight. What everyone else calls “mission impossible,” Sing Core calls a job well done.


One of the most magnificent doors in the world, made by Sing Core, Inc.

Here at Sing core we can manufacture panels that are stronger, more durable, lighter in weight, more warp free than AWI standards, in more available skins.  Moreover, they come in any size, larger than any other panels on the market, they are more visually appealing, and come with many more features, with more bells and whistles.  Not to mention, they are the only panels on the market that come with a full 50 Year Warp Free Guarantee.  They are 100% handmade in America, using materials sourced from the united states.

Magnificent Pivot Doors Made Exclusively by Sing Core

This huge 21 foot door, one of the largest doors in the world, is made with Sing Core technology.  You can see how small this man is compared to the door in this photo.  This is a true life image that shows the actual scale.  No one else can do this!

 

Brandner Design Incredible Accordion Pivot Sliding Door Room Dividers

With the help of Sing Core, Brandner Design’s amazing innovation and design skills made this door one of the most exceptional doors in the world.  Many people thought it wasn’t possible to make accordion sliding door room divider walls.  No one can shed doubt on these doors, because this video is irrefutable proof.

When their client needed a special door that could divide this room and fit into a recessed receptacle inside the wall, Brandner Design called upon Sing Core to help them with the task.  No other company was better suited to the task, because our panels are stronger, straighter, more dimensionally stable, and lighter, so they’re able to accommodate more hardware and stand the test of time, even after hundreds and thousands of uses.  In the door business, there is one rule that stands true, no matter what kind of door you are installing.  Exceptional panels result in exceptional doors.

 Pocket Doors

On the left is our world renowned Sing Core substrate which you can use to apply any skin.  On the right, is the door finished by the architects.  This beautiful mural door is an example of how an amazing designer or architect can use our panels to create the most beautiful doors imaginable. Mural doors are one of the more interesting ways to use our products. They can also add a great deal of character to an otherwise stale environment.

We can build you a substrate, ready for you to paint your own murals, or you can order doors from us in any skin.

Sing Core can make you doors in any skin

 

Metal Doors

Hot Rolled Steel Pivot Door

Sing Core specializes in a wide variety of exceptional quality metal skin doors.  We have hot rolled steel, cold rolled steel, and aluminum skins.  We also offer edge banding as a premiums option.

Unique Hot Rolled Steel Sliding Man Doors

This beautiful hot rolled steel man door can be opened and closed very.  Check out these beautiful Sing Core doors we manufactured for Jet City Winery.  The hot rolled steel appearance gave them the amazing darkened look.  We used 20 gauge steel with edge banding, which gave the doors a very heavy look, like solid steel, but with the patented and patent pending Sing Core design, we were able to make them very light. 

Hot rolled steel sliding man doors

The best metal doors in the industry have Sing Core inside them.  We start with a super strong, super light, ultra straight panel, then encase it completely in metal, resulting in a metal door that is  up to 900% lighter than solid metal doors, while maintaining increased structural strength, better resistance to warping, and a much higher degree of visual appeal.  No one else can do this!

Because pivot doors require exceptional strength and the need to be exceptionally straight and lightweight in order to function properly, Sing Core was the only choice.  Only Sing Core can create 14 foot French doors that are lightweight, strong enough to stand on, and warp free according to AWI standards, and visually appealing enough to meet even your most rigorous needs.  Quality is at the core of the Sing Core philosophy.

 

French Doors

14 Foot Tall French Door

Industry leading millworks, architects, and high end designers call on us to make all kinds of doors that present far too much of a challenge for other door manufacturers to construct.  This was the very door many of our customers called “mission impossible.”

14-Foot-tall-French-door
Huge 14 foot tall French door
one-man-holding-14-foot-french-door

This 14 foot tall French door can be easily carried and transported by just a single worker, yet, pound for pound, it’s stronger than steel and warp free guaranteed for 50 years.  Here at singcore, we make the impossible possible! Doing the impossible while providing you with exceptional quality products is part of our philosophy here at Sing Core.

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Sing Structure Grid Specs

Applications -> Building Components -> Doors -> Sing Structure Core Specs

General Specifications

Standard Sing Core composite structure consists of inventor Peter Sing’s reinforced vertical grain torsion box grids at small sizes for increased strength and performance, often compared to honeycomb core, but so much stronger than any other lightweight structure core. This enables door manufacturers to design and build massive doors which have increased dimensional stability.

Click here for tips on How to Create the Right Sing Panel for your specific project.

Every Sing Core manufactured door is unfinished (unless specified otherwise) and is guaranteed for structural integrity for 10 years or more. See details on written guarantee that came with your door that has Sing Core inside.

Detailed Specifications:

Scope: Subject to local building codes, the standard Sing reinforced torsion box composite core is featured inside doors intended for use in:

  • Single family dwelling interior applications
  • Multifamily dwelling, low-rise professional office, library and low-rise motel interior applications
  • Lighter use industrial building and factory, hotel and retail sales building interior applications

Product Description: Patented Sing composite structure core

  • Structure core is available in 2 x 2″, 2 x 3″, or 3 x 3″ grids

Structure Core Materials: Sing Core composite structure is manufactured using Eco-friendly cold-press process. Composite materials include:

  • Natural vertical wood fiber, with gain orientation vertical (not horizontal)
  • Grid voids are filled with recycled EPS foam (default) or other architecturally specified material 
  • Facings to complete the torsion box are wood, or other specified flat building material
  • Formaldehyde-free bonding agent is used for adhesion of all components

Architectural Specifications Substitutes

For information on some of our architectural substitutes click here.

Interior Blocking: Solid wood implants are inserted as lock blocks or anchor points. Also additional stiles (vertical wood implants) or rails (horizontal wood implants) can be positioned at any desired location inside the door prior to the door’s manufacture. (Note: Depending on your expectations, solid wood implants should be supported by at least 12 inches of Sing Core material to maintain true flatness.)

Delivery: Reasonable care is taken to ensure safe transportation of your Sing composite torsion box door core from factory to your location including proper crating to protect the natural beauty of your door during transport.

Storage and Protection: Store any door with Sing Core inside in an upright position and allow to acclimate to room temperature following shipment receipt or prior to finishing or installation.

Preparation: Per manufacturer’s specifications, ensure that door frame openings are constructed plumb, true and level prior to installation. Select fasteners of adequate type, number and quality to assure proper function.

Installation: Installer shall be specialized in the installation of the type of work that is associated with the project and will comply with manufacturer’s installation policies and procedures to ensure proper end use.

  • Verify that hinging and latching assemblies operate freely and correctly

Add-stiles-and-rails-to-your-sing-door-as-anchor-points-drawingFinishing: The finishing of the Sing Core standard door is the responsibility of the client due to the product being delivered in paint-grade quality unless specified otherwise in writing. Any sealing must be in accordance with manufacturer’s specifications to protect against a variety of environmental conditions as necessary.

  • Edge-band edges to encapsulate Sing Core (see T-molding)
  • Seal all 6 surfaces with two coat minimum on operable panel(s)
  • Finishing or re-finishing must be completed following acclimatization and installed within 7 days
  • Avoid finishing after rain (or damp) or during periods of higher than average humidity
  • At least once a year, conduct periodic inspections of coating to ensure no door components are exposed
  • Reseal the surface as necessary

Machining: Sing Core doors are easy to work with in the millwork shop for CNC machining or on-site for finishing, sawing, sanding, cutting and fastening. No specialized skills or equipment is necessary, other than standard woodworking tools. Treat Sing Core doors just like you would any other standard door blank.

Strength Performance: Patented Sing Core has an unsurpassed strength as compared to other lightweight substrate materials tested at 660 PSI (based on 2″ x 2″ grids and 3/4″ thick) for superior structural integrity and is resistant to warp, twist and crack when compared to other materials.

Light Weight Performance: Sing Core weighs much less than other traditional building materials, as much as 50% less; or more, as little as 4 lbs. per sq. ft. yet sustainable and true green technology.

Insulation Performance: Standard Sing Core doors feature built-in insulation value with an R3 (can be upgraded to to R6.5 or more) rating per inch, depending on architect’s specifications.

Acoustical Performance: Sing Core standard doors have a natural sound-deadening quality for noise control. Standard sound transmission class (STC) is 30*. Additional noise control specifications can be met at the behest of the customer or designer and must be noted in advance.

Eco-friendly: Sing Core is manufactured using natural wood fibers, no formaldehyde, or toxic chemicals, is created using less energy than any other core material with little or no waste. The structure of Sing Core is 100% renewable (nature-grown) clean fiber and/or recycled material.

Warranty: Sing Core professional manufactured doors can be structurally guaranteed and warp-free for 50 years under normal conditions.

Basic Sing Door Spec Drawings: Click here

variety-of-design-options-for-architectural-doors-illistration-sing-core
Custom-cut Window/Lite Openings: Lite openings for glass inserts can be custom cut per your specifications (drawings above show examples of standard openings) for glass insertion.

Door Specifications

Door Width
Rough Opening Width
Rough Opening Height 6/8
2/0 (Single) 26″ 82-1/2″
2/4 (Single) 30″ 82-1/2″
2/6 (Single) 32″ 82-1/2″
2/8 (Single) 34″ 82-1/2″
3/0 (Single) 38″ 82-1/2″
4/0 (Double) *50″ 82-1/2″
4/8 (Double) *58″ 82-1/2″
5/0 (Double) *62″ 82-1/2″
5/4 (Double) *66″ 82-1/2″
6/0 (Double) *74″ 82-1/2″

See also: Door Technical Information

Appearing regularly in Contemporary Architecture Design

* 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.