- Large non warp bi fold door
- Over-sized honeycomb sandwich bi fold door
- Bi-fold door drawing
- Strong non warping insulated bi fold door
- Insulated honeycomb bi fold door
- Thin Bi Fold Panels
Proud to be the newest Eco-friendly architectural building product that is more lightweight and stronger than other traditional building products, Sing Core is a part of this forward thinking movement that is creating an advanced attitude that embraces high tech while maintaining a green perspective.
“The Center is shared home and place of collaboration for AIA Seattle, Design in Public, Seattle Architecture Foundation, and AIA Washington Council, as well as a place for our partner organizations to convene events and conversations relevant to design and our city.”- CFAD Seattle
To help support the efforts of all progressive architects and designers in the Northwest, Sing Core has donated $36,000 in its patented Eco-friendly architectural building materials thus far.
We are honored to be joining forces with Suyama Peterson Deguchi, Krekow Jennings and OAC Services. Seattle Architecture Foundation, Design in Public and AIA Washington Council will also be joining the project later this year.
Sing T Slot Panel Modular Buildings are the perfect high precision (+/- .006 inch tolerance) high performance truly modular structure systems designed to be an Eco-friendly choice of an insulated lightweight structure that is stronger than steel (with 660 PSI Sing Core) pound for pound.
Patented Sing T Slot Panels are not hollow; they feature a uniquely composite of torsion box structure, where unlike other torsion box configurations (where the voids are left hollow), with rigid foam insulation adhered wall-to-wall to create a solid insulated structural substrate that is resistant to warp, bend, twist, cup, rot or otherwise failing.
This Sing Core is the main ingredient in the modular T Slot Panel used in our T Slot Panel Modular Buildings.
Using our standard components, anyone can design and build any conceivable modular building in very little time with the highest precision and performance standards available.
Designed for our clients who depend on us to provide solutions from beneath the sea (U.S. Navy) to outer space (NASA) and everywhere in between, we make this technology available to others who demand nothing less than the very best insulated modular buildings available.
Modular Buildings
With all the many options available you can design a t slot panel building to fit your needs, like the…
Amazon Box Theater
The 10 ft. tall Amazon box theater in the Jet Blue terminal at the JFK airport is a frameless structure made with patented 1.5 inch T Slot Panels.
The giant insulated portable structure is modular, lightweight and high strength. Perfect for any travelling movie theater.
Standard thicknesses in our stock Modular T Slot Panels are 1.7917 inches and 3.6234 inches, including a .040 aluminum surface on both sides. In most cases the thicker panels are used for the floor and roof.
•
4 x 8 Panel
• 2 x 8 Panel
• 2 x 4 Panel
• 4 x 8 Window Panel
• 4 x 8 Door Panel
Using these standard modular T slot components you can design nearly any structure configuration for free standing insulated structures, including many T slot connection and accessory options readily available to your designers and engineers.
Examples of T Slot Panel Structures include
Portable buildings, Shelters, Mobile office, Gate house, Ticket booth, Modular buildings, Cleanroom, Environmental control, Observation deck, Conference rooms, Mezzanines, Modular offices, Work platforms, Distribution centers, Portable office buildings, Parts storage, Smoking shelters, Bus shelters, Inplant offices, Guard booth, Training rooms, Watch towers, Parking booth, ISO clean room, Modular cleanroom and any other configuration for any application calling for insulated modular buildings.
Custom Modular ComponentsThough we focus most of our attention on our standard modular components, our custom factory produces modular components to architectural specifications.
This is to say that components can be built in any size (up to 50 ft.), in any configuration and with any surface material available.
Aluminum, brick, ceramic tile, fiberglass, FRP, galvanized steel, glass, HPL, Kevlar, LVL, marine grade plywood, metal, plastic, stainless steel, wood or any other available flat building material specified.
Unlike other portable buildings, Sing T Slot Modular Buildings are
Sing T Slot Modular Building panels come standard with R 6.25 insulation, but could be upgraded to meet your architectural specifications. This insulation provides temperature separation preserving the interior of the structure environmentally protected from the exterior conditions (a huge advantage in extreme conditions, like on scientific expeditions on the polar caps).
Increasing the quality of the intended use of your modular buildings, it is a huge added benefit to enjoy the sound deadening qualities of Sing T Slot Panels further providing separation from the modular building’s exterior for added convenience, privacy and peace of mind no matter where your modular building is located, whether it is amidst heavy air traffic or an in plant office in a noisy factory.
Sing T Slot Panel Modular Buildings weigh a fraction of the weight of other solid core structures because of the patented torsion-box/foam-insulation composite structure of Sing Core.
High precision Sing Core is the strongest interior structure base material that enables panels to span large distances with very little (if any) additional supporting structure with little or no deflection. Only the patented torsion box composite substrate could accomplish the feats attributed with this newly invented building material.
How Strong is Sing Core? It was independently tested by the University of Washington at 660 PSI (that’s stronger than steel pound for pound); well over 6 times the strength of other composite materials used in the aerospace industry.
When you’re making a substantial investment in insulated modular buildings, they need to be durable, especially if they are to be assembled, disassembled, transported, stored and reconfigured repeatedly. Your Sing T Slot Modular Building can be guaranteed to last for 50 years without fail, and you will always be able to get additional components to add to your structural components as your need for portable buildings and/or shelters increases.
Isn’t it time that you made a major improvement upgrade in your modular buildings?
About Man Doors
Man doors are doors within doors. For instance, you can have a large sliding door, say 14 ft tall and 20 ft wide. You might not want to slide that big door back and forth every time you access the space. No problem. Just install a separate egress point (a man door) inside that large oversized door and you have simple method or entering and exiting the space without having to articulate the mother door.
Man doors can be tricky because the host door (which can be very large, potentially up to 40 ft or more) must be built with very high structural integrity so as to accommodate the regular and potentially heavy use of the man door.

That’s why the world’s best large doors with man doors are made with Sing Core, because using Sing Core is the only way to build such a door which can be guaranteed not to warp, bend, twist, or otherwise fail, and you need this high precision dimensional stability to accomplish such a feat, over time.
That’s why inventor Peter Sing guarantees his warp-free large door solution to remain warp-free for 50 years. No other lightweight, fully insulated, sound deadening and climate control large door in the world can make such a claim. Not only is Sing Core the best way to do it, it is the only way to do it.
A Man Door is a man-sized access door that is pre-built ~ or after market modified ~ in a larger door to provide access of an individual without having to open the entire large door, exposing the entire area. Man Doors are also referred to as pedestrian doors, pass doors and/or access doors. Man doors are one of the absolute best ways possible to add additional functionality and character to your high end residential and commercial locations. What’s more, you can order your man door in any skin, even metal skins, like hot rolled and cold rolled steel, aluminum, bronze, brass, and copper.
Sing Core makes the best man doors. Why? Because our Eco-friendly high-precision lightweight and high strength core material allows door manufacturers to create doors of enormous size while keeping them straight and true. So perfectly straight and true, in fact, that Sing Core offers a free large door consultation that can result in a professional large door that can be guaranteed true flat and to remain true flat for 50 years.
When you have a super large door (could be as big as a hangar door) in many cases you don’t want to open the entire door area just to access the space. That’s where the Sing Man Door comes in. There’s no doubt that Sing Core is the go to source for insulated large doors of any size that can be guaranteed not to warp, bend, twist or otherwise fail for 50 years.
It is quite common for someone who seeks out the services of Sing Core to request that a large oversize door come with an access door that allows egress without having to unsecure the entire big door area. In most cases Sing Man Doors are simply Sing Metal Doors incorporated into the design of the original oversized door.

Very few companies can compete with Sing Core when it comes to man doors, because of the extremely high precision, strength, and lightweight characteristics required in making a man door suitable for use for decades to come. Our Professional Man Doors come with our 50 Year Warp Free Guarantee and are 100% made in USA using materials sourced from USA. We pride ourselves on making the best man doors in the business.
Large doors with articulating access panels are common, and are increasing in popularity amongst garage door companies who use Sing Core as their substrate material for their large garage doors.
Man Doors can be includes in all types of doors, including (but not limited to) large sliding doors, overhead doors, large pivot doors, large swing doors, large carriage doors, and more…
Maybe it’s time you thought about having pedestrian access via a specially designed pedestrian door to be used as a pass door allowing access to your space in a smart, more economical and secure fashion.





It is common for self/home contractors of spec home projects to contact Sing Core for Eco-friendly insulated building materials that are lightweight and stronger than steel pound for pound.
You might be surprised that many spec homes have been built completely out of Sing Core materials, everything from the foundation to the roof and everything in-between including the doors and interior furnishings. All built to last for centuries.
You might think of Sing building materials as panels (which is understandable because our true flat panels are most popular around the USA and the world) that are used mostly as doors, floors, walls and roof panels.
Avid true green spec home builders and Sing supporters use a combination of Sing Panels and Post and Beam for every conceivable portion of the home build and even the furniture inside the home.
If you are a qualified Spec Home Builder, Sing Core has the expertise to assist you utilizing this patented Eco-friendly building material that will last for centuries in many – if not all – components of your spec home.
Qualified Spec Home Builders deal manufacturer direct, eliminating the middlemen, so that you can have complete control of your design build spec home and do it yourself.
Our primary affiliation is with the millworks that are highly skilled and qualified to deliver an end product which exemplifies the highest and best use of our patented SingCore building materials. In fact, when we receive inquiries about our products, our first question is, “Who is your millwork company?” If they do not have one they are working with, we suggest they get one and have them contact us directly.
SingCore is an extraordinary building material that left to itself is not much more glamorous than any other engineered plywood, even though nothing can compare to SingCore’s unparalleled light weight and strength. Yet, in the hands of a skilled millwork, their specialized craftsmanship is what makes Eco-friendly SingCore shine with the beauty and elegance SingCore products are known for.
Millworks face many challenges when bringing the architect’s vision to life. In some cases, the limitation of available building material can render a potential job impractical or even impossible.
For instance, a particular project might include a large wooden door. If the large wood door is an exterior door over seven feet tall or over four feet wide (as is the case for most modern pivot entry doors) millworks and custom door manufacturers will simply pass on the large door portion of the job, forfeit the entire job altogether based on the oversized exterior door, or if they do take the job may agree to build the large door according to the architectural specifications but will not offer a warranty on the performance of the big door.
Large exterior doors, especially large wood doors, are a problem because millworks and door manufacturers know the doors will fail due to warping. It’s nothing personal; it’s just the nature of the beast being the wood grain itself which tends to move according to changes in temperature, moisture or other environmental conditions.
Patented SingCore when engineered by the warp-free team can prevent any large door from failing over time. Millworks are confident they can provide a solution for any project including large doors of any size if they have SingCore inside, guaranteed.
Clients may ask for a warranty on the large doors (that without SingCore inside could not be warranted) and the millwork can now offer the professional SingCore guarantee – in writing – that the doors with professional SingCore inside are guaranteed not to warp, bend, twist or otherwise fail for 50 years.
Millworks use either open edge or closed edge Sing Panel, whichever works best for the project at hand, as well as many options for skin types, solid blocking, custom lite cut outs, solid and exterior edging options.
SingCore is easy to machine and work with using traditional woodworking tools, CNC and edge –banding machinery and equipment.
Used as substrate material, SingCore can be delivered to the millwork ready for cold press or hot press lamination. Alternatively, millworks may desire exterior surfaces to be applied in our factory, which makes their job easier.
SingCore DurabilityProducts made of Sing panels are easy to repair damage to its original condition simply and easily by cutting a hole (you can even use a chain saw without compromising the structure due to its unique Sing Core torsion box/foam and stress skin composition). Any repairs will have the strength, integrity and durability of the original structure.
All Professional Sing products are guaranteed warp-free and structure guaranteed for 50 years. We can accommodate your specifications, just let us know your required tolerances for flatness, and Sing Core can provide the solution guaranteeing your customer’s satisfaction and your peace of mind.
We specialize in providing solutions for high-end applications and millworks, based on the requirements of our customers, meeting or exceeding their expectations and those of their clients by using the right materials and years of warp-free solution experience. Add to that, our commitment to you, to do everything in our power to support you in your efforts to remain competitive and win the bid.
If you are a millwork operation serving high-end clients, our 50 year guarantee for Sing products build both you and your customers’ high levels of confidence.
SingCore excels at creating warp-free oversize doors blanks or substrates in almost any exterior surface material; most popular is wood and/or aluminum up to 50 feet long in almost any thickness.
We can custom manufacture to your specifications large quantities of door planks or panels in odd sizes for millworks used for doors, tabletops, room dividers, temporary walls, cabinetry, countertops, etc…
We can provide the customizations that you desire, like lock blocks, solid wood implants, anchor points for fastening, custom lite cut outs, a full range of skin and edging options.
How is it possible?
| SingCore uses the latest and most sophisticated, yet Eco-friendly technology to build the best doors in the world. Our specialty is the most challenging oversized doors for the most high-end clients in the world, with pride. | SingCore door with our modern facility and new door building technology is 5 times more efficient than conventional door manufacturing. Fill out the simple price quote then you will see how together we can win the bid. | SingCore doors are the only doors among the door industry that can be guaranteed warp-free for 50 years, lightweight, stronger than steel pound for pound, insulated, sound deadening, Eco-friendly, long-lasting and resistant to rot over time. | Thanks to SingCore, you can bid on jobs that may have been considered previously to be too large for you. No reason to be intimidated by door jobs of more than 50 doors, as we can easily make 300-door-blanks-a-day for you. |
See: Door Specifications
Example Sing Solution
One of our most prestigious clients in the Mid-West needed 700 specific door blanks to fulfill an order. Rather than dedicate their resources to this order, they reached out to SingCore. We made the door blanks in three days, so the client was able to go on about their business as usual without having to bear the cost of adding staff, equipment and re-tooling.
Advantages:
Fast turnaround time – It took less than 3 days for SingCore to complete the order
High quality – Each door was manufactured with patented SignCore technology in Washington state, ensuring the end user guaranteed strongest true flat and lightweight doors. Note that the light weight of these doors saved more than half on shipping costs.
Easy to fabricate – Due to the patented SingCore process and our factory’s design and dedication to high quantity production, we are able to make more Eco-friendly doors in less time at less cost.
“…we were unable to compete for large quantity orders.”
Many of our partners report, “Before teaming up with SingCore, we were unable to compete for large quantity orders,” admitting that they simply stopped bidding on large quantity jobs (anything over 50 doors), because they knew they were no match for the major players; until SingCore.
SingCore routinely provides 200-to-300 doors blanks a day to distinguished door manufacturers, enabling them to compete even against companies that provide cheap import doors. With the majority of the work done in advance (Sing door blanks are easy to work with to build all types of sing doors) you can concentrate on finishing, adding hardware, delivering and installing the doors, knowing that they are receiving a superior product that guarantees satisfaction and longevity.
| Sing Core | Wood-based | Foam | Aluminum | Balsawood | Nomex | Plastic | Cardboard | |
| Insulation | ✓ | ✓ | x | x | x | x | x | |
| Sound Deadening | ✓ | ✓ | x | x | x | x | x | |
| Lightweight | ✓ | ✓ | ✓ | ✓ | ✓ | x | x | |
| Strength | ✓ | x | ✓ | ✓ | ✓ | x | x | |
| Solid | ✓ | ✓ | x | ✓ | x | x | x | |
| Eco-friendly | ✓ | x | x | ✓ | x | x | ✓ | |
| Renewable | ✓ | x | x | ✓ | x | x | ✓ | |
| Oversize | ✓ | x | x | x | x | x | x | |
| Dimensionally Stable | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Affordable | ✓ | x | x | x | x | x | ✓ | |
| Waterproof Upgrade? | ✓ | ✓ | ✓ | x | ✓ | ✓ | x | |
| Fire Retardant Upgrade? | ✓ | ✓ | ✓ | ✓ | ✓ | x | ✓ | |
| Bullet-proof Upgrade | ✓ | ✓ | x | x | x | x | x | |
| Thickness Available | ✓ | x | x | x | x | x | x | |
| Skin Options | ✓ | x | x | x | x | x | x | |
| Easy to Machine | ✓ | x | x | x | x | x | x | |
| Fast Turnaround | ✓ | x | x | x | x | x | x |
The Sing T Slot Panel is an extraordinary composite of leading edge technologies resulting in a nearly unlimited variety of configurations.
The good news: You can create to your heart’s content ~ and ~ much of the work has already been done, because most (if not all) of the imaginable components have already been designed for integration with the Sing T Slot Panel.
Insulated Lightweight and High StrengthStandard Sing T Slot Panels come packed with insulated rated at R3.5 per square inch. Foam can be upgraded from our standard EPS foam (R3.5) for even more insulation per your specifications by using Polyurethane foam (R6.5), Polyisocyanurate (R7.5), Phenolic (over R8) or other more advanced foams that may be available to meet your specifications.
Insulated Sing T Slot Panels are the only panels that offer not only lightweight and strength but also offer excellent temperature control. The unique attributes of the Sing Core material offer insulated isolation between the separate sides of the T Slot Panels providing a protective thermal barrier between interior and exterior surfaces. Keep cold on one side and heat on the other effectively with insulated Sing T Slot Panels for advanced climate control.
The sound deadening characteristics are added benefits – especially for temporary equipment enclosures, structures and portable clean rooms or emergency shelters – providing added safety, security and an additional barrier from external sources.
Modular Buildings
With many options in building a T slot modular building you can create what fits your needs. For more information on T Slot Panel modular buildings click here. Patented T Slot Panels were used in this:
Amazon Box Theater
The 10 ft. tall Amazon box theater in the Jet Blue terminal at the JFK airport is a frameless structure made with patented 1.5 inch T Slot Panels.
The giant insulated portable structure is modular, lightweight and high strength. Perfect for any travelling movie theater.
With Sing T Slot Panels you can quickly assemble and disassemble the most basic – or highly sophisticated – structures for any purpose from casual to critical high precision. Our most popular high performance modular T Slot Panels are surfaced in aluminum, but can host any flat building material as the working surface as well as complex composites to achieve your desired levels of performance.
No need to re-invent the wheel; all the hardware, necessary connectors, gasket seals and hundreds of accessories are already available for making your T Slot Panel project come to life.
It is easy to integrate the full family of Sing Products into your T Slot Panel design to complete your project with the fully insulated high precision Sing family of products to make the most diverse field of applications come to life; including (but not limited to) structure components, like doors, walls, ceilings, floors and roofs as well as Sing Beams for stronger than steel structural support.
The combination of the many Sing products can make your entire structure, artwork, furniture or industrial project completely modular, portable and reuseable.
Let your design creativity flow with all the options that are readily available. You can make nearly anything lightweight, high strength and perfectly flat that can last for centuries with Sing T Slot Panels.
![]() T Slot Wood Panel |
![]() T Slots without Wood |
See also T Slot Booths & Structures
And T Slot comes in many different configurations, all can be embedded within Sing T Slot Panels per architectural specifications.
Sing T Slot Panels have a variety of options available for accessing otherwise unused T Slots hidden from view due to being positioned under the surface skin of the panel.
T Slot Panels can be configured to fit any existing T Slot configurations. See also: T Slot Manufacturers
Here are some ideas for consideration in your next project:
See if these animations don’t get your creative juices flowing:
Sing Insulated Aluminum Panels are an Eco-friendly unique combination of traditional high-end carpentry skills and modern space-age technology alternative to other insulated aluminum panels that are lightweight and high strength and proudly made in the USA.
What makes Sing Insulated Aluminum Panels different from other insulated aluminum panels?
The beginning of the Sing Insulated Aluminum Panel’s uniqueness, you must start at the heart of the insulated aluminum panel, which is the SingCore. The patented core features a structure grid built of vertical grain torsion box. For many years, torsion box has been known to add strength and stability to large structures covering long spans while reducing the overall weight.
Left to itself, the torsion box structure is traditionally left empty. Instead of being left empty the empty spaces inside the torsion box structure grids are filled with rigid foam insulation, which gives the Sing Insulated Aluminum panels their insulation R value and unparalleled shear strength. The substructure is then sandwiched between two aluminum stress skins and laminated with formaldehyde-free glue, to form an insulated aluminum panel which is stronger than steel (660 PSI) pound for pound.
No other insulated aluminum panel is so high precision while other core materials vary in thickness across the span of the panel SingCore exemplifies new standards of precision with extremely accurate tolerance of +/- .006 inch.
This extreme high precision is why Sing Insulated Aluminum Panels are used in high-end industrial applications throughout the United States government and science industries including the military, aerospace and NASA.
You can use Sing aluminum panels as shelves or raised flooring throughout your private or commercial vehicles for better handling cargo. The lightweight and high strength offers organization and clarity, without compromising vehicle weight or handling, so you can add any configuration or levels which would best suit your needs.
Photos (above) show Sing aluminum panels installed in a van being used as a raised floor, shelf, or truck bed.
Insulation R value starts at R3.5 per inch and can be increased to meet your architectural specification by filling the torsion box voids with other varieties of rigid insulation materials possessing higher insulation values and/or fully encapsulated insulation and substrate.
In fact, all Sing Insulated Aluminum Panels are custom manufactured in our factory located in the scenic Pacific Northwest to architectural specifications. It’s as if each insulated aluminum panel is an individual work of art. Specifications may include any variety of materials to meet specific high performance standards.
Not restricted for only use as industrial insulation panels, Sing Insulated Aluminum Panels are found in commercial applications, such as retail, office, refrigeration and hospitality industries and in high end real estate and homes as insulated aluminum doors.
Sing Insulated Aluminum Panels are probably the best material to use for creating insulated aluminum doors, especially if the door in question is a large, oversized door. The lightweight, impressive shear strength and insulation reinforcement makes large doors foolproof with accuracy higher than solid steel at a fraction of the weight, reducing the cost of any large high-end metal door project immensely.
The weight of the metal door dictates hardware and supporting structure requirements, which are expensive considerations for heavy doors. Heavy doors are also more expensive to transport and install requiring heavy equipment and labor, while insulated aluminum doors made with Sing Insulated Aluminum Panels are lightweight, less expensive to ship, handle and install. Plus the structural insulated panels cost savings of having an insulated end product as well as doors that require less maintenance over time.
Only Sing Insulated Aluminum Panels can be guaranteed not to warp, bend, twist or otherwise fail (including full structure guarantee) for 50 years. That’s an impressive 50 year guarantee that is not something seen in industrial, commercial or residential industries. This 50 year guarantee would not be possible if not for the unprecedented structure strength of SingCore inside each Sing Insulated Aluminum Panel.