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Sing Solution Considerations

What should you consider when seeking out the Sing solution?

1. Dimensions Affect Price

 

Sing Core can build anything that can be panelized, from large pivot doors to hangar doors and panelized structures such as warehouses or even Sing Log Homes. Very large panels or walls can reach enormous proportions and can be made modular for near seamless assembly on site. Other factors which affect the overall price of your project will be,

2. Importance of Surface Material

 

The skin material used on your panel’s exterior greatly affects how the substructure is built. Basically, the greater the tendency for the exterior surface material to move, the more of Sing’s True Flat engineering is required to create a hybrid substrate which will counteract the panel’s tendency to warp, bend, twist, or otherwise create a challenge in the field over time.

Cutaway shows detail of patented reinforced vertical grain torsion box core

3. Sing Core Inside

The core of the panel in question can come in many different variations besides the patented and fully insulated, reinforced vertical grain torsion box core to match the high precision performance expectations of your project. Many considerations are made to determine the size of the patented structure grids as well as integration of patent-pending counter-warp materials to achieve desired results.

4. Thickness

Thickness of your panel and each of its features affects everything. For instance, it is much easier to keep a panel straight and true the higher the percentage of patented Sing Core is inside your panel proportionally. Even if your surface material is natural wood, your client might desire 3/8” thick material, when using 1/8” material is far more effective, and the difference is not noticeable on the end product.

All of these things play a part in the design and engineering of your panel in terms of

Giant Factory Door Extremely Light Weight

A. WEIGHT

The overall weight of your custom panel(s) is determined by the sum of all the components which are necessary to create a one-of-a-kind solution which meets your required specifications. The greater the amount of Sing Core inside your panel, the less it will weigh and the stronger it will be.

B. STRENGTH

No other substrate in the world is more lightweight or high-strength than inventor Peter Sing’s Sing Core, which provides for a solid composite core based on Sing’s patented insulated and reinforced torsion box structure, which is stronger than steel pound for pound (660+ PSI). By doubling the among of patented Sing Core, you multiply the strength of the panel four times.

C. WARP-FREE

Besides being Eco-friendly and made in the USA, patented Sing Core is the only substrate which can guarantee your panel will not warp, bend, twist, or otherwise fail. In fact, this revolutionary building material enables the best door companies in the world to build large doors of any size which can be guaranteed warp-free for 50 years (a first in the industry).

Affordable Sing Core Made in USA exported to Thailand

Affordable Sing Core Made in USA exported to Thailand

BUDGET CONSIDERATIONS

Sing solutions for problems and challenging projects can be costly, but they may also be extremely affordable depending on your performance expectations.

If you are on a budget and flexible about some of the elements of your design, there is a good chance that Sing’s True Flat Team may be able to reengineer a solution for you that will both meet your budget and your performance expectations.

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Standard Exterior Door

General Specifications

Standard Sing Core exterior doors are manufactured with patented Sing Core material as the base interior substrate of the door. The Sing Core substrate material is created using a vertical grain natural wood torsion box design while the traditionally empty voids are filled wall to wall with recycled foam. The standard foam material is recycled rigid EPS foam. A 10 inch natural wood lock block is positioned centered at 37 inches for door knob and locking mechanism placement. The core material is wood framed by 1.5 inch natural wood for finishing strength and attaching hardware. The torsion box is completed by adhering an exterior surface material (skin) in your choice of marine grade plywood, fiberglass (FRP) or aluminum. Bonding agent used in adhesion of the entire composite material is formaldehyde-free.

Standard Sing Core Exterior Doors do not include frame.

Every Sing Core manufactured door is unfinished and guaranteed for 10 years for structural integrity.

Detailed Specifications:

Scope: Subject to local building codes, the standard Sing Core door is 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: 1.75” or 2.25″ side-hinged door panel manufactured by Sing Core with frame.

  • Door component includes paint-grade door panel

Door Panel Materials: Sing Core doors are manufactured using Eco-friendly cold-press process. Composite materials include:

  • Sing Core vertical wood-grain torsion substrate filled with recycled EPS foam (other materials available to match architectural specifications)
  • Core material is framed with wood stiles and rails
  • Facings are your choice of marine grade plywood (1/4 inch), 0.09 fiberglass (FRP) or aluminum (.62).
  • Formaldehyde-free bonding agent is used for adhesion of all components

Interior Blocking: Solid wood implant is inserted for door knob and/lock block hard points.

Delivery: Reasonable care is taken to ensure safe transportation of your Sing Core door from factory to door shop for finishing and pick-up or deliver to your location.

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.

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

Finishing: The Sing Core standard exterior door is unfinished and includes Marine grade plywood is paint grade, fiberglass in pre-primed, and aluminum is untreated. Those charged with the finishing of the standard exterior door must possess proficiency in assuring the exterior seal to prevent potential water damage. Following purchase, the owner of the door is charged to assure the door’s finish is maintained.

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 rating per inch.

Acoustical Performance: Sing Core standard doors have a natural sound-deadening quality for noise control. Standard sound transmission class (STC) is 30*.

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 manufactured doors are structurally guaranteed for 10 years under normal conditions.

Basic Sing Door Spec Drawings: Click here

Door Specifications

Door Size
Actual Unit Size
Rough Opening Size
32″ x 80″ 33-3/4″ x 81-1/2″ 34-1/4″ x 82″
34″ x 80″ 35-3/4″ x 81-1/2″ 36-1/4″ x 82″
36″ x 80″ 37-3/4″ x 81-1/2″ 38-1/4″ x 82″

 

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.

 

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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.

 

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Standard 3-0 x 7-0 Door Specs

General Specifications

Standard Sing Core 3 0 7 0 doors are manufactured with patented Sing Core material as the base interior substrate of the door. The Sing Core substrate material is created using a vertical grain natural wood torsion box design while the traditionally empty voids are filled wall to wall with recycled foam. The standard foam material is recycled rigid EPS foam. A 10-inch natural wood lock block is positioned centered at 37 inches for door knob and locking mechanism placement on both sides of the door. The core material is wood framed by 2-inch natural wood for finishing strength and attaching hardware. The torsion box is completed by adhering an exterior surface material (skin) in your choice of paint grade (Birch ply), wood veneer(s), or natural wood stave. Bonding agent used in adhesion of the entire composite material is formaldehyde-free.

Standard Sing Core 3 0 7 0 Doors include frame perfectly suited for the door of your choice and ready to hang. Specify either 2×4 or 2×6 wall thickness to determine frame size for door installation (not supplied by Sing Core).

Every Sing Core manufactured door is finished to specifications and guaranteed for 5 years for structural integrity.

Detailed Specifications:

Scope: Subject to local building codes, the standard Sing Core door is 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: Standard 3 0 7 0 door panel manufactured by Sing Core available in 1 3/8” or 1 3/4″ thickness is designed for side-hinges (not supplied).

  • Door component includes paint-grade door panel, wood veneer, or wood stave for 2×4 or 2×6 wall installation

Door Panel Materials: Sing Core standard 3 0 7 0 doors are manufactured using Eco-friendly cold-press process. Composite materials include:

  • Sing Core vertical wood-grain torsion substrate filled with recycled EPS foam
  • Core material is framed with 2-inch wood stiles and rails
  • Facings are your choice of paint grade (Birch ply), wood veneer, or natural wood stave
  • Formaldehyde-free bonding agent is used for adhesion of all components

Interior Door: Features R 3.5 per in. insulation, available in 1 3/8″ or 1 3/4″ door thickness.

Exterior Door: Features R 6.5 per in. insulation, available in 1 3/4″ door thickness only

Interior Blocking: Solid wood implant is inserted for door knob and/lock block hard points on both sides of door.

Delivery: Reasonable care is taken to ensure safe transportation of your Sing Core 3 0 7 0 door from factory to door shop for finishing and pick-up or deliver to your location.

Storage and Protection: Store your Sing Core standard 3 0 7 0 door 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

Finishing: The standard finishing and sealing of the Sing Core standard 3 0 7 0 door includes paint grade (Birch ply), wood veneer, or unfinished natural wood stave. Additional finishing options include your specifications at additional charge.

Machining: Sing Core standard 3 0 7 0 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 are necessary. Treat Sing Core doors just like you would any other standard wooden 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 3 0 7 0 doors feature built-in insulation value with an R3 rating per inch.

Acoustical Performance: Sing Core standard 3 0 7 0 doors have a natural sound-deadening quality for noise control. Standard sound transmission class (STC) is 30.

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 manufactured doors are structurally guaranteed for 10 years under normal conditions.

 

Basic Sing Door Spec Drawings: Click here

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.

 

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Door Finishes

There are many ways to build large doors with Sing Core inside, the only doors that can be,

Guaranteed Warp-free for 50 Years


When it comes to oversize doors, one door stands out above the rest for high-end applications; see comparison. Look for these features in your door for the most discriminating taste(s):

  • Available in any size (up to 16 ft.)
  • Lightweight
  • Strong (stronger than steel pound for pound)
  • Insulated
  • Sound-deadening
  • Guaranteed True Flat
  • Resistant to warp, twist, crack & rot
  • Standard 10-year warranty
  • Professional 50-year warp-free guarantee

For more detailed information on our doors, see our Architectural Specifications.

Though Sing Core Doors are available in nearly any wood species, our standard varieties include:

sing-maple sing-cherry sing-oak sing-vg-fir sing-walnut
MAPLE CHERRY OAK VG FIR WALNUT

Note: Door designs can be modified to meet your specifications and requirements an may include the application and bonding of any flat building material. Please feel free to inquire for more information.

1. Paint Grade Door

2. Wood Grain and Wood Stave Door

3. Hardwood Plywood Door

1 Paint Grade Door

Our most popular door blanks are paint grade, and can be made to your specs including surface materials of,

  • Birch ply (most common)
  • Wood plywood
  • MDO
  • HPL
  • Other material, as specified

 

2 Wood Grain and Wood Stave Door

Besides paint grade for the surface, we also provide solid wood stave laminate on both sides of the sliding door. Wood stave is easy to work with and will last. Your Sing wood stave door will be more high precision than solid wood door (less warping, and twist and crack) due to Sing Core’s extremely high tolerance (+/- .006 inch) and, rigidity and high strength (660+ PSI) and professional grade wood grain and wood stave doors are certified and guaranteed not to warp, bend, twist, or otherwise fail for 50 years.

Sing Core provides hot-press ready door blanks to door manufacturers who add wood veneer on both sides of Sing door blanks which are made of Luan skin or marine grade plywood sandwich with patented Sing Core in the middle, solid wood around 4 edges and wood block implants where needed for hardware.

oversize-panel-edge-glued-together-planks-5ftx10ft Sing-Hardwood-Panels-Variety

Note: Veneer has to be handled very carefully every step of the way during production (we prefer to let the millworks handle this delicate procedure) and it is easy to damage by users over the years (but wood stave can be easily sanded and repaired).

We offer a very good price for wood stave doors, the cost is not much more than wood veneer doors.

3 Hardwood Plywood Door

We could make door with hardwood plywood as an effective way to make super large doors that you can stain any color. Up to 4×8 doors have no seam, but by orienting the grain horizontally, you can achieve a nearly seamless presentation on really big doors or extraordinary size.

Available in any available wood species, most common are Sapele, Oak, and Maple ply.

Sing Hardwood ply door has excellent strength, yet is lightweight, features good insulation and better sound deadening qualities than solid wood plank doors.

 

variety-of-design-options-for-architectural-doors-illustration-sing-core

 

Applications -> Building Components -> Doors -> Door Finishes

 

 

 

Paint Grade Door

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Basic Sing Door Spec Drawings

The following are standard drawings of doors which you can print and/or modify for marking up your specifications as an alternative to paying for professional shop drawings.

Hinged Door

Pivot Door

Sliding Door

Splined Door

Doors with Professional Sing Core inside are the only Eco-friendly doors that can be guaranteed to remain warp-free for 50 years, including full structure warranty.

Thank you for trusting Sing Core with all your lightweight high-strength door needs for any type or style of door in any size made of any flat building material.

 

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Sing Panels with Plumbing and Wire Chase

sing-panel-horizontal-embedded-cable-chase-wire-chase-plumbing-chaseCustom Sing Panels can be manufactured to your architectural specifications which may include special chases for plumbers to route hot and cold water feeds via plumbing or electricians to run electrical wiring, communications and security through a patented Sing panel.

Surface mount conduit and exterior chases can be added to Sing panels as they are, though many users of our patented insulation reinforced torsion box core prefer to use embedded wiring chase of for water supply pre-installed plumbing chase.

Embedded Chases

Embedded chases can be placed at specified locations prior to manufacturing your Sing panel to meet the specific requirement of the job at hand, accommodating communications center needs or the special needs of inplant offices, clean rooms, temporary warehousing, watch towers, guard shacks, portable classrooms, spa expansions, home theaters or any application where running utilities, like electricity, wiring and/or cables or plumbing inside and through your Sing panel may be advantageous.

Common horizontal chases are specified at 16 inches and 45 inches from the base, while the most common location for a vertical chase is in the center of the Sing panel. Regardless, every Sing panel is custom manufactured in our factory, and we can have your wire chase or plumbing pre-installed within your panels at any location specified.

How to Specify Wire Chase Locations

sing-panel-embedded-cable-chase-wire-chase-plumbing-chaseIt is easy to have your embedded chases pre-installed at the proper locations. All you have to do is to be certain to disclose the precise locations and sizes of your wire chase (plumbing chase or cable chase). We will provide you with an architectural drawing of your panel before your custom Sing panel is built for you to confirm the chase’s location.

No Loss of R Value

To preserve the R-value of your Sing panel it is advisable to have the cable chase filled with spray foam insulation after pulling the wires or routing the plumbing through the embedded channels. Likewise, if a channel is not used, it should also be filled with foam insulation prior to final assembly, unless insulation properties are not necessary for your application.

Panel Chase Options

Although many options abound for electricians and plumbers to install access to services, another popular method includes running cable, wire and plumbing through panel connectors that run the length of your standard Sing panels, or alternatively running services through the floor.

Many creative options are available for adding access to water, electricity and communications without having the necessity of pre-installed chases being embedded in your Sing panels.

Economy Chase Options

An emerging value-minded approach to inexpensive reinforced structural insulated panels is to obtain two economy 1.5 inch Sing Panels from your local Lowe’s Pro Desk. Prior to gluing them together to make a single 3 inch panel, simply router out where you want your chase channel to be, then adhere the two panels together. This is an inexpensive option discovered by price conscious tiny house builders.

 

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Standard Door Sizing Tiers

The main challenges of a large door often include warping, very heavy, and poor structural strength.

 

How do you find the best large or oversized door?

 

Make sure the door will have at least a one year warranty; a large door can warp in just a few days after installation or it may warp two or three years later.

 

Guarantee the weight. How many pound per square foot? (lbs./ft.²)

 

Find a structural guarantee. It is easy to lightweight doors, but it is much more challenging to build a lightweight door with high strength.

 

Last, most importantly, is how flat the door is. Doors that are very tall, wide, and thin are the most difficult to build perfectly flat. Every door is different and has to be treated individually. Sing Core has patented and patent-pending technology to keep the door, no matter the size, flat and compliant with AWI standards.

 

High precision is not only visually appealing, but is most important for structural integrity. High precision is crucial for properly bonding adhesion which is a major factor for the door’s structural strength. Sing Core has the highest precision in the industry, maintaining a tolerance of ± 0.007”. Check the precision of other door cores before you buy honeycomb core.

 

This is why our core is guaranteed much longer than other cores.

 

What is a large or oversized door?

 

A door that measures more than 48” wide or 96” tall.

Although Sing Core makes doors of any size and many are extremely large, oversized doors, there are several size plateaus that affect pricing tiers of the Sing Doors you may desire.

Another challenge faced with high end large door is to make the faces seamless.
This can be quite costly.

 

But if large doors are built in sections and joined together on-site by the installer, you can save on shipping and handling costs, especially if the large door needs to fit in an elevator or tight doorway. Sing Core has built many large doors that are joined on-site without any warping. Average dowels and even larger biscuit will not prevent door warping. If you join several 5’ x 10’ x 2” doors together, it will not be an easy task. But Sing Core has had many years of experience with over sized doors, devoted to solving the common issues with larger doors while providing the most current patented and patent-pending technology.

If you have a good budget, high precision demand, and no issue accessing the job site then one piece large door panel is the only way to meet your custom demand.

Otherwise, modular door sections joined on-site will be the best option. There are two major factors to achieve high quality when building large doors. One is to make sure there is no warping once the modular sections have been joined. The second issue is maintaining a high precision joint line so that it is not noticeable. This requires a very high precision core to achieve. Sing Core is the most precision door core available, with a tolerance of ± 0.007”. It is important to be sure that the thickness of the core is within these tolerances. We suggest that you check the door core precision, especially when it is a honeycomb core.

Another criteria needing to be met is the weight of the core per square foot. The weight is a major issue with oversized doors. Heavy doors are significantly more expensive due to additional structure costs, higher labor costs, and extra shipping and handling costs. Heavy door core does not mean that it will have high strength.

Strength plays a key factor when building larger doors. Larger doors require extra strength to maintain a long life span. It is important to learn what the core structure is made of. Doors are not the same as walls. Doors need to move repeatedly everyday while walls are permanently placed. Walls commonly use 2” x 4” framing methods which do not work well for building doors. If the structure of the door is not strong, it will feel like a solid door. When you close the door, there will be a rattling sounds or it can deform over time. It is very easy to tell, all you have to do is close the door and hear how strong or solid the door is made.

 

What type of skin is best to build a large modular door?

 

Paint Grade
It is easy to hide the seams. Seams can be almost unnoticeable if modular sections are joined with a Sing Spline. If the spline is made of solid wood, it can move or warp after the moisture levels change and it will be reflected on the surface of the door. This can cause the surface of the door to crack after the seasons change.

HPL (High Pressure Laminate)

HPL is available in a wide variety of patterns. The best choice for HPL is a vertical pattern to help the joint blend into the surface. The photo on the right demonstrates the precision of our modular oversized door joining method. The sections are being held together by a Sing Spline only. Click here to see our Sing Spline

Metal

Metal doors are traditionally very heavy, but with Sing Core inside your metal door can weight roughly 1/3 of a traditional metal door. You can choose from any type of metal you would like, but our most commonly made metal doors are Aluminum or Cold-Rolled Steel. If it is paint grade metal, the seam can be filled with joint compound and then painted making a seamless joint. Click here to see a paint grade Sing metal door.

Fiberglass
Fiberglass can be a smooth surface or have textured pebble skin. After priming and painting, the seam will be invisible. Our most popular skins are fiberglass and HPL due to their light weight and are very easy to join on-site.

Wood Staves
Wood staves are much thicker than veneer, meaning that they have additional strength. It is easier to hide the seam with the staves laid horizontally instead of vertically. See the Kyoto code.Wood staves have the advantage of being easily repaired. It is more stable and looks better than rare solid wood. The thinner the wood, the more vulnerable it is to cracking. We highly recommend 1/8” or thicker wood staves.

Wood Veneer
Wood veneer is often much more challenging because it is usually very thin, normally only 0.020” thick. We always suggest using thicker wood staves which are usually 0.125” thick rather than veneer. Sing Core has built hot pressed wood veneer door panels as large as 12’ x 10’. It is very costly to use veneer, oftentimes we use wood staves to build larger doors. However, you may need wood veneer to match the surrounding wall, certain design pattern, or for book-matching properly.

The only 50 year warp-free guarantee and full structure warranty
 

standard-size-button-singcore single-oversize-button-singcore
double-oversize-button-singcore triple-oversize-button-singcore

Standard Sized Doors

Standard sized doors include any standard sized door that you might purchase over-the-counter, such as the most popular sizes:

Door Height Door Width
6′ 6″ 2′ 0″
2′ 4″
6′ 8″ 2′ 8″
2′ 10″
7′ 0″ 3′ 0″
3′ 6″
8′ 0″ 4′ 0″

 

32x 80x3

32″ x 80″ x 3″

38-5-16x91-27-32x1-3-4

38 5/16″ x 91 27/32″ x 1 3/4″

33x96x1-5

33″ x 96″ x 1.5″

35x84x1-25

35″ x 84″ x1.25″

43-375x96x1-5

43.375″ x 96″ x 1.5″

40x94x1-25

40″ x 94″ x 1.25″

When a door measurement, exceeds either 8 ft. tall or 4 ft. wide, oversize pricing applies such as

Single Oversize

Oversized pricing is based on 4×8 increments. So a “Single Oversized” door could exceed either 8 feet tall or 4 feet wide, but not both.

88-1-4x96x1-3-4

88 1/4″ x 96″ x 1 3/4″

41-69x105-1-8x1-3-4

41.69″ x 105 1/8″ x 1 3/4″

71x95-3-16x2

71″ x 95 3/16″ x 2″

56x84x1

56″ x 84″ x 1″

60x96x1-3-4

60″ x 96″ x 1 3/4″

54x73-5x2

54″ x 73.5″ x 2″

Double Oversize

Double oversized refers to doors that are both over 8 ft. tall and 4 ft. wide.

51-5x114x2

51.5″ x 114″ x 2″

57-1-8x99-3-8x1-3-4

57 1/8″ x 99 3/8″ x 1 3/4″

56-9-16x108-5-8x2-1-4

56 9/16″ x 108 5/8″ x 2 1/4″

86x108x2

86″ x 108″ x 2″

59-625x117-5x2-5

59.625″ x 117.5″ x 2.5″

91-1-2x108-1-16x1-3-4

91 1/2″ x 108 1/16″ x 1 3/4″

Triple Oversize

Triple Oversize refers to large doors that exceed 8 ft. in both directions length (height) and width.

108x114x2

108″ x 114″ x 2″

102x110-1-2x2

102″ x 110 1/2″ x 2″

98x118x2-25

98″ x 118″ x 2.25″

 

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Standard Pre-hung French Door Specs

General Specifications

Standard insulated French door pre hung door marine grade plywood fiberglass aluminumStandard Sing Core pre-hung doors are manufactured with patented Sing Core material as the base interior substrate of the door. The Sing Core substrate material is created using a vertical grain natural wood torsion box design while the traditionally empty voids are filled wall to wall with recycled foam. The standard foam material is recycled rigid EPS foam. A 10 inch natural wood lock block is positioned centered at 37 inches for door knob and locking mechanism placement. The core material is wood framed by 1.5 inch natural wood for finishing strength and attaching hardware. The torsion box is completed by adhering an exterior surface material (skin) in your choice of marine grade plywood, fiberglass (FRP) or aluminum. Bonding agent used in adhesion of the entire composite material is formaldehyde-free.

Standard Sing Core Pre-hung Doors include frame perfectly suited for the door of your choice and ready to hang. Specify either 2×4 or 2×6 wall thickness to determine frame size for door installation.

Every Sing Core manufactured door is finished to specifications and guaranteed for 10 years for structural integrity.

Detailed Specifications:

Scope: Subject to local building codes, the standard Sing Core door is 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: 1.5” or 2.25″ side-hinged door panel manufactured by Sing Core with frame, pre-hung.

  • Door component includes paint-grade door panel and frame for 2×4 or 2×6 wall installation

Door Panel Materials: Sing Core doors are manufactured using Eco-friendly cold-press process. Composite materials include:

  • Sing Core vertical wood-grain torsion substrate filled with recycled EPS foam
  • Core material is framed with wood stiles and rails
  • Facings are your choice of marine grade plywood (1/4 inch), 0.09 fiberglass (FRP) or aluminum (.62)
  • Formaldehyde-free bonding agent is used for adhesion of all components

Interior Blocking: Solid wood implant is inserted for door knob and/lock block hard points.

Glass Insert:

  • Single lite opening
  • Dual pane clear tempered glass insert
  • Glass dimensions: 32″ French door =  64-3/4″ x 18″,  34″ French door =  64-3/4″ x 20″,  36″ French door = 64-3/4″ x 22″

Pre-hung Includes:

  • Preassembling of jamb and threshold
  • Mortised and attached hinges
  • 3º bevel on lock side
  • Door is fit and installed into the jamb

Delivery: Reasonable care is taken to ensure safe transportation of your Sing Core door from factory to door shop for finishing and pick-up or deliver to your location.

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.

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

Finishing: The standard finishing and sealing of the Sing Core pre-hung standard door includes Marine grade plywood is paint grade, fiberglass in pre-primed, and aluminum is untreated. Additional finishing options include your specifications at additional charge.

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 rating per inch.

Acoustical Performance: Sing Core standard doors have a natural sound-deadening quality for noise control. Standard sound transmission class (STC) is 30*.

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 manufactured doors are structurally guaranteed for 10 years under normal conditions.

Basic Sing Door Spec Drawings: Click here

Door Specifications

Door Size
Actual Unit Size
Rough Opening Size
32″ x 80″ 33-3/4″ x 81-1/2″ 34-1/4″ x 82″
34″ x 80″ 35-3/4″ x 81-1/2″ 36-1/4″ x 82″
36″ x 80″ 37-3/4″ x 81-1/2″ 38-1/4″ x 82″

 

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.