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Sing Door Core

Applications -> Building Components -> Doors -> Sing Door Core

singcore sheet 2What is Sing Door Core?

  • It is the patented foundation of all Sing Doors
  • May be the core of true green revolution, if you believe in
    • the renewable structure of Sing Door Core
    • saving energy
    • lightweight
    • high-strength
    • affordable

Sing Core is based on torsion box technology that has been used in the wood working trade for thousands of years, and is often compared to lightweight core, honeycomb core and other composite building materials in the industry. It is also compared to SIP (structural insulated panels) with the exception that structural insulated panels actually do not have the structural grids that are necessary for strength, making SIP less than 10% the strength of Sing Core.

  • dimension: 12 inch x 48 inch to 4 ft x 8 ft
  • thickness from 1/2 inch to 6 inch.

See More information on: Sing Core

Compare to Other Types of Door Core

Paper Door Core

The most popular core material used in retail doors is paper core also known as cardboard core and honeycomb core. The most attractive feature of paper core is that it is light weight, nearly as lightweight as hollow core, with very little added strength. These lightweight doors are often used in apartment buildings and housing units because they are lightweight and less likely to injure children in door-related accidents. The downside is that there is no structural integrity and it is not long before the door fails due to warp, bend or twist. Paper core doors also have no insulative or sound-deadening qualities and are fairly easy to damage as it does not take much to puncture, crack or break a paper core door.

Foam Door Core

The next most popular core used in retail doors is foam core. While still yielding a lightweight door, much like the paper core, it also does not have any strength. Foam has a very low compression strength (+/- 10 PSI) resulting in high failure rates, and will not remain straight as the only strength in the foam core door is provided by the exterior skin material. To achieve strength, more heavy material must be added to the surface of the door, cancelling out the lightweightedness of the door. While a stronger foam core door may be extremely heavy due to reinforcement, the foam will offer some insulative value and limited sound deadening.

Particle Board Door Core

Particle board is the third-most popular core used in retail doors. Customer seeking a higher quality door than paper or foam core are often persuaded to purchase the particle board core door because it appears to be a real door, especially when compared to the lighter weight doors on the sales floor. The heaviness of the door implies that the door has strength in comparison to the less expensive paper or foam core doors; only much heavier, particle board doors do not offer much additional strength, and commonly fail over time (though it is harder to punch-through a particle board door than a paper or foam core door).

LVL Door Core

LVL door core is a reasonable solution for door core, as it consists of multiple layers of veneer bonded together to make a solid core material. The problems that result from LVL come from resulting in an extremely heavy door that will not survive changing temperatures very well over time. Though it does have some warp and twist resistance, failure is experience in the long term effects that lead to delamination. Once the lamination in the door’s interior begins to fail, the door will not function properly and may become unsightly.

Solid Wood Door Core

Solid wood core is expensive because it uses a large amount of precious natural resources and for traditional enthusiasts it is sought out for the sake of originality and/or trueness to nature, though it is not a responsible use of natural resources. Solid wood doors have no insulation or sound deadening qualities are heavy and have little or no structural integrity due to the nature of the characteristics of the natural grain. The solid wood doors often fail due to bend, warp, twist and will not be able to secure properly.

Balsa Wood Core

There are several advantages to using balsa wood as door core. Balsa wood is an excellent alternative to other types of core, because it is a natural organic product, but the problem is that it is in short supply making it a more expensive resource and does not fare well when exposed to water (acting like a sponge soaking up water and moisture). Also, since it is a natural wood grain source material, it is prone to warp, bend and twist, just like any other natural wood fiber door core.

Plastic Core

Plastic door core is a good upgrade from paper core in that it is still lightweight, is resistant to moisture but doesn’t offer any other benefits over paper core except for a minor increase of strength. Plastic core is still weak/unstable, non-insulated and can be damaged or will fail easily within a short lifespan.

 

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About Doors

DOOR DIRECTORY

CONTENT PRODUCT APPLICATION TRADES EDUCATION LINKS OPPORTUNITY
Products Sing Core Sliding Door Home Owner FAQ Media Door Reps
Application Sing Sandwich Flush Door Architect How to Video Manufacturers
Sing Panel Panel Door Contractor Technical Industry
 * Skin Options French Millwork Core Types Hardware
Barn Door Door Mfg Veneer
Pivot Door Design/Build Laminate
Carriage Veneer Core Mfg
Sound Proof Laminators
More Doors…

The door is a moving structure used to block access, visibility and noise between two otherwise connected areas. The door as we know it is moving to the next level of high-performance, safety and security thanks to patented Sing Core.

This new door revolution is introducing a new evolution in door technology that delivers an insulated door that is true flat, lightweight, stronger than steel and Eco-friendly. Sing Core doors are the high-end solution used by the best millworks when it’s important to deliver the best door.

Enjoy the safety and security of a door that cannot be easily breached and is much safer for finger and limb injuries due to the lighter weight than conventional doors. Sing Core doors are available in any door configuration and/or size and available to all door manufacturers.

We supply those 3 products to door mfgs to build all type of door..see application of type of doors
We have a list of link which provide info all about door industry.

Sing Door Core
Sing Sandwich panel for doorNo solid wood edge.
Most common use with
solid stile and rail
as panel to build
large size door at
low cost.Core Size
2 x 2 inch
3 x 3 inch
Sing Door PanelThe only wood based
door could guarantee
true flat under
weather condition.Design unlimited
door appearance.
Click here to see
design of Sing door.
SIZE:
less than 4 ft x 8 ftOversize Door Panel
Over 9 ft wide
(to avoid shipping problems
we will build multi panels
w/non-movement biscuit join.Length up to 50 ft.Thickness range
from 3/4 in. to 6 in.
Skin OptionsWood Base Skin
plywood
veneerWood Stave
1/8 in, 1/4 in, 3/8 in.Wood Species
metal
FRP
Cement base
Solid Wood Edge
standard 1.5 inch
on 4 sides
or any custom
solid woodLock Block
12 in. x 3 in.
30 inch from
center on both sidesWindow
or Lite Opening
any size, shapes,
at any location
LINKSDoor hardware suppliers
Sliding door hardware
Carriage door hardwareVeneer and hardwood supplierPrehung doorMill work list

 

Contents

Door Products

Sing Door Core

Sing Door Sandwich

Sing Door Panel

Door Applications

Interior Doors

Exterior Doors

Single Leaf Door

Flush Door

Moulded Door

Composite Door

French Door

Panel Door

Stile and Rail

Plank and Batten Door

Ledged and Braced Door

Frame and Filled Door

Wicket Door

Sliding Door

Glass Sliding Door

Bypass Door

Pocket Doors

Barn Door

Interior Barn Door

Ledge and Brace Door

 

Door Alternatives

Fiberglass Doors

Aluminum Doors

Steel Doors

 

 

Rotating Door

Pivot Door

Revolving Door

 

High Speed Door

Clean Room Door

Refrigeration / Cold Room Door

 

Blind Door

Gibb (Jib) Door

False Door

Invisible Door

 

Half Door

Dutch Door

Stable Door

 

Double Leaf Door

French Door

Garden Door

Rebated Door

Australian Door (double plywood swing doors)

Barn Door

 

Saloon Doors

Café Doors

Batwing Door

 

Bi-fold Doors

 

Garage Doors

Carriage Doors

Overhead Door

Sectional Overhead Door

Roller (Tambour) Door

Roller Shutter

 

Specialized Doors

Sound Proof Door

Fire Door

Impact Resistant Door

Extreme Weather Door

Weather-proof Watertight Wood Doors

Bulletproof Door

Blast Door

Trap Door

Pet Door

 

Architectural Doors

 

Sing Door Data

Types of Wood Doors

Door Blanks

Skin Options

Technical Information

Clients List

Industrial Links

Assembly & Connection

Door Frequently Asked Questions

Door Specifications

Photo Galleries

Carriage Doors Gallery

Sliding/Pocket Doors Gallery

Interior Doors Gallery

Exterior Doors Gallery

Overhead Doors Gallery

How to Build

How to build a true flat door

How We Build Our Doors (The Best Method)

How We Build Our Doors (The Second Best Method)

How to make a Sing Door with glass

Carriage Doors

Sliding/Pocket Doors

Sliding Glass Doors & French Doors

Stile and Rail Doors

Interior Doors

Exterior Doors

Overhead Garage Doors

 

Door Cores

Hollow Core

Lattice Core

Honeycomb Core

Corrugated Cardboard Core

Sing Core

Stave Core

Solid Core

Particle Board

Foam

Door Skins

Wood

Veneer

Plywood

HDF

MDF

Metal

Fiberglass

Vinyl

 

Door Sizes

Standard: 36” x 80”

Exterior and Passage: 2’ 6” to 3’ wide x 6’ 8” height

Closets: (vary)

Oversize / Large Door: 8′ + tall and/or 4′ + wide

Garage: 7’ to 8’ wide

Double-car: 16’ wide

 

Door Hardware

Hinges

Standard

Bi-fold

Multi-fold

Door Handles

Doorknobs

Crash / Panic Bars

Pull Handle

Door Fasteners

Door Locks

Keyed

Bolt

Latchbolt

Deadbolt

Strike plate

Sliding Hardware

Sliding Door

Sliding Barn Door

Pocket Door

Wall Mount

Bypass

Multi-pass

Accessories

Door Closer

Door Opener

Door Damper

Door Knockers

Finger Plate

Letter Box / Mail Slot

Peephole

Door Safety

Door Stops

Door Guards

 
 

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Off-site News, Tips and Techniques

How To Paint steel, Aluminum, Plastic, and Acrylic

This guide will cover prepping and painting of steel, aluminum, plastic, and acrylic plus more. I’m sure some people will think some of the steps are not necessary and quite extensive compared to some guides. Yes, this may be true but I am writing this guide to help get a quality finish from your case, not something that looks like the neighbor painted in his homemade cardboard paint booth with a 99 cent can of paint from the dollar store… Click to View

 

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Custom Door Window Glass Openings

Applications -> Building Components -> Doors -> Custom Door Lites

CUSTOM WINDOW CUT-OUTS – ANY SIZE – ANY SHAPE

for door professionals  and  manufacturers

Introducing the new, “American,” French door.

Say, “Au revoir,” to the traditional French door that limits your design options, and say, “Hello,” to the new Americanized Sing door that is nearly limitless in your creative design possibilities.

The Sing American door is basically a Sing Panel (that can be any size) custom cut for your window lights (without compromising the strength) to achieve your desired results, and can even be used to duplicate the exact appearance of any other door (and have been used in antique restorations).

The beauty of the traditional French door feature is in the greater light presence due to greater glass insertion and represents the status of traditional values. But, as you know, if you have shopped for French doors, you are limited to few options as to the placement and size of your light openings for glass.

1-piece-true-flat-10-light-door-vs-13-piece-stile-and-rail-french-door-sing-american

Compare Sing American Door solid one-piece design (left) to traditional 13-piece frame (right).

Up ‘til now, the only option for you, if you wanted an extraordinary French door, was to hire a high-end custom door craftsman or millwork to make your custom door to your specifications, even extremely big doors.

1 STRENGTH

Each Sing American Door features a one-piece Sing Panel construction with window light openings cut to your specifications, then install the glass. Traditional French doors are based on stile and rail design, which makes the door weak at the four connection points and all the joints in between the glass are the weakest points of your door.

2 SIMPLIFIED DOOR MANUFACTURE

The unique one-piece Sing American Door uses patented Sing Core as the foundation of the process in contrast to conventional French glass door construction which is solid wood, stile and rail or features a sandwich panel design with foam, wood based, paper or hollow core which does not have the strength of Sing Core (one kick will delaminate other cores and they will warp, while kicking a Sing door will break your leg and can be warp-free). See core comparison used in door and many other industries.

3 COST EFFECTIVE

Custom high end doors or even regular import panel doors and French doors are created laboriously via craftsman-like intense processes. Alternatively Sing American Door require a fraction of the labor cost. You could pass these savings on to your customer or have a better profit margin by promoting high quality, long lasting true flat doors made in the USA.

4 SAFETY

Sing American Doors are lightweight. It is safer for families that have children (with precious fingers and toes). Another safety concern is due to the possible risk of injury or breakage due to kicking glass at the bottom of the door. Many designers are looking for options of reducing the glass exposure at the bottom of the door without compromising the overall appearance.

5 BE CREATIVE

Enter the Sing American Door, the door inspired by the traditional French door but allows you to have complete control of the design process. The Sing American Door is our most popular of all the Sing Doors that we manufacture.

There are many other reasons (below) that explain the advantages of Sing American Doors vs. other conventionally manufactured doors.

 

Sing American Door French Door
New Technology x
True Flat x
Lightweight x
High Strength x
Insulated x
Sound Deadening x
Any Size x
1-piece Construction x
Custom Glass Light x
Any Shape x
Any Thickness x
Any Surface Material x
Easy Glass Install x
Fast Turnaround x
Eco-friendly x

A new technology for manufacturing doors – especially doors with glass – is used by all major high end millwork professionals and some leading edge door manufacturers. It starts with a patented Sing Core flush door, then cut window openings in any shape or size without compromising the strength of the door.

french-door-americanized-custom-design-glass-anywhere-7-inchesSing Outside the Box

Embrace your creativity and let your imagination run wild!

Now you can sing with us and have your own Sing American Door customized to have glass openings custom cut to your specifications.

We see so many different and unique custom requests and styles that are unrestricted. We love enabling our clients to make their custom door dreams come true and so enjoy this creative process.

Plus, Sing American Doors have the super-strong benefits of being a solid structure without any weak connecting points to compromise your door and are resistant to warp, twist and rot over time, designed and constructed for lifetimes of maintenance-free enjoyment.

Eco-friendly Sing Doors are manufactured with our true green patented process using 92% less precious raw materials, with much less labor, energy expended and waste than any other door.

Sing American Doors come to you ready to install the glass and finishing by your door installer, or we can have the door finished for you.

For optimal strength and resilience we suggest that you keep your window light opening locations within a 7 inch door perimeter, and you enjoy extra safety and security due to having an elegant solid door without weak spots that is fully customized by you.

The Sing American Door Secret

The secret is in the strength of patented Sing Core (click here to see Sing Core vs. other cores) that is 4-to-5 times the strength of aluminum honeycomb core used in the aviation industry. The superior compression strength (can be 700 PSI or more) and built-in insulation makes the Sing Panel the most high-performance door. Sing Core is 20-to-60 times stronger than the foam core found inside foam-core doors. A regular foam-core door is not strong enough to cut and support glass installation without reinforcement.

Doors made of Sing Core provide the possibilities of adding more trim and molding or the highest rating(s) for fire proof, bullet proof or sound deadening to build specialty doors with a designer look.

handcrafted-true-flat-high-end-eco-friendly-french-door-lightweight-high-strength-singHigh-end Sing Doors

We make the most exclusive, precision high-performance door for our most exclusive clients. To achieve these spectacular results each door is custom crafted by hand. The Sing American Door is the economical alternative allowing you to duplicate the results of the custom handcrafted Sing door, saving you $1,000 or more on each door.

Sing American Doors are proudly made in the USA for you.

Any Surface Material

While French doors or doors with windows are normally considered to be wood or wood grain finished, with your Sing American Door, you can specify what material your door is made of, like aluminum, ceramic, concrete, glass, fiberglass, metals, plastics, steel, even fire-resistant mag-board and bulletproof Kevlar. So whether you are looking for an interior door with glass or an exterior door with glass, even a steel entry door with glass or any other type 1 metal door with glass, you can be certain that your door with glass insert will outperform any other door with glass insert and method. When you care to have the best interior door with glass insert, your Sing American Door with glass panels is guaranteed to be the best affordable solution.

What is a French Door?

A French door is a door style consisting of a frame around one or more transparent and/or translucent panels (called lights or lites) that may be installed singly, in matching pairs, or even as series. A matching pair of these doors is called a French window as it resembles a door-height casement window. When a pair of French doors is used as a French window, the application does not generally include a central mullion (as do some casement window pairs), thus allowing a wider unobstructed opening. The slender window joinery maximizes light into the room and minimizes the visual impact of the doorway joinery when considered externally. Often, the doors of a French window open outward onto a balcony, porch, or terrace and they may provide an entrance to a garden. (Wikipedia.)

You, our client, your dreams and desires are our priority. Let us help you achieve your American dream with your Sing American Door.

General Specifications

architectural-door-specs-illustration-torsion-box-coreStandard Sing Core 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 foam material is available in various forms depending on your specification. The default is EPS foam. Natural wood lock blocks are positioned at locations as necessary for locking mechanism placement or as anchor points. The core material is wood framed by 1 ¾ “ natural wood for finishing strength and attaching hardware. The torsion box is completed by adhering an exterior material (skin) according to your specifications. The default is a wood-grain (Luan) material. Bonding agent used in adhesion of the entire composite material is formaldehyde-free.

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 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 ¾” side-hinged door panel manufactured by Sing Core

  • Door component includes paint-grade door panel only

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

  • 5x10-lockblock-2-sideSing Core vertical wood-grain torsion substrate filled with recycled EPS foam
  • Core material is framed with wood stiles and rails
  • Facings are wood veneer (Luan)
  • Formaldehyde-free bonding agent is used for adhesion of all components

Interior Blocking: Solid wood implants are inserted as lock blocks or anchor points.

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

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 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.

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

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

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 (Doulble) *74″ 82-1/2″

See also: Door Technical Information

How to Order

Simply determine the dimensions of the door you have in mind, the height, the width and the thickness. Then determine

  • The external skin material
  • Any internal implants required and their locations
  • Any performance specifications desired

Now, you’re ready for our easy ordering process, using our online price quote.

 

* 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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Industry Associations

Millwork, Woodworking, Veneer & Hardwood

AHIC
American Hardwood Information Center
412/829-0770
www.hardwoodinfo.com

APA
American Plywood Association
543/565-6600
Recently changed name to Engineered Wood Products Association
www.apawood.org

AHM
Appalachian Hardwood Manufacturers, Inc
336/885-8315
www.appalachianwood.org

AWI
Architectural Woodwork Institute
571/323-3636
www.awinet.org

CPA
Composite Panel Association
301/670-0604
www.pbmdf.com

CRA
California Redwood Association
415/381-1304
www.calredwood.org

HPVA
Hardwood Plywood & Veneer Association
703/435-2900
www.hpva.org

IWPA
International Wood Products Association
703/820-6696
www.iwpawood.org

NADRA
North American Deck & Railing Association
800/623-7248
www.nadra.org

NAWLA
North American Wholesale Lumber Association
800/527-8258
www.nawla.org

NHLA
National Hardwood Lumber Association
901/377-1818
www.nhla.com

NELMA
Northeastern Lumber Manufacturing Association
207/829-6901
www.nelma.org

NOFMA
National Oak Flooring Manufacturing Association
901/526-5016
www.nofma.org

SCMA
Southern Cypress Manufacturing Association
412/323-9320
www.cypressinfo.org

SPIB
Southern Pine Inspection Bureau
850/434-2611
www.spib.org

THC
The Hardwood Council
www.hardwoodcouncil.com

WCLIB
West Coast Lumber Inspection Bureau
503/639-0651
www.wclib.org

WRCLA
Western Red Cedar Lumber Association
631/643-9725
www.wrcla.org

WWPA
Western Wood Products Association
503/224-3930
www.wwpa.org

For wood properties and spec sheets see U.S. Forest Products Lab:
www2.fpl.fs.fed.us/TechSheets/tropicalwood.html
www2.fpl.fs.fed.us/TechSheets/hardwood.html
www2.fpl.fs.fed.us/TechSheets/softwood.html

For a more complete list see:
www.fpl.fs.fed.us/forest-product-orgs.html