Kate Miller No Comments

19′ Pivot Entry Door



Interior view of extremely large pivot door with hardware


Case study:

A 55” wide x 19’ tall x 3.25” pivot door. With differing Cedar and oak wood stave skins.


Being approached by a client who is in need of a uniquely large pivot door to withstand the difficult climates of Lake Tahoe can seem like a near impossible feat. This pivot door needed to be lightweight for ease of installation and daily use by the client, impact resistant to hold up to everyday use, sound deadening to drown out the hustle and bustle of everything outside

A pivot door built with patented and patent-pending SingCore inside can make anything possible.

Exterior view of oversize pivot door with hardware

Opposing wood species

Dissimilar wood species on the interior and exterior of the door means differing rates of expansion and contraction. SingCore has the strength and stability to remain rigid against the push and pull of the dissimilar skins.


Lightweight oversize door


Now let’s take a look at why this door needs to be lightweight.

First off, big pivots doors tend to be very heavy which makes them more difficult to manage, they require custom made specialized hardware and require a lot of maintenance due to the stress that the pivot door adds to the structure.
Secondly a pivot door is only held with two points of contact on the top and bottom of the pivot door; meaning that if the door warps or twists, the door operation will be degraded or completely fail.

A pivot door this size with a solid core will weigh around 800lbs before any skins are added.
Now with SingCore, this door’s weight is a fraction of what other solid pivot doors would have weighed. This weight savings translates into a reduced overall budget by having lower shipping costs, lower hardware cost and lower cost for the labor of the installation.

Adverse climate for keeping oversize pivot doors straight

Ready for any climate
Lake Tahoe is known for its incredible skiing and breathtaking beauty. Not for its temperate climate.

This pivot door will see outside temperatures as low as 4°F while the inside temperature may be a toasty 76°F, which is a 72° difference.
SingCore pivot, sliding, hinge, and pocket door slabs are fully insulated with your choice of recycled EPS foam core (3.5 R value per inch) or urethane foam core (5.7 R value per inch).

Perfectly straight oversize pocket door

At 19’ tall this pivot door is as big of a challenge as it gets to keep straight.

All door slabs fabricated by SingCore are completely custom. The SingCore team takes into account the finishing, hardware, and climate when building each core. No two doors are alike. And we take great pains to ensure every pivot, sliding, pocket, and hinge door stays within AWI standards.

We love creating one of a kind oversize doors that no one else can.


Need help finding hardware for your oversize pivot door?

We recommend https://www.bridgeportworldwide.com/ for all of your large pivot door hardware needs.



Ivan Grantham No Comments

The Best Large Doors in the World



Built to last centuries, guaranteed for 50 years





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

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

14' Tall Oak Doors in One World Trade Center

Reaching for the stars from the tallest doorway heights of the tallest building in the USA

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

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


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

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








The best doors in the world have Sing Core inside







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


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

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

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







What Makes Sing Core Doors Different?






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







How Do You Build a Sing Door?







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

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


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Before finishing

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


One of a Kind Sing Doors






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

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






Attention to Detail






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


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

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







Sing Core is not a one size fits all solution







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


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







Sing Core Solved the Problem







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

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







How Can You Get a Sing Door?







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








“Sing Core inside your door.”








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


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With Sing Core
You Can Have Your
Dream Door






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

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AWI Members Large Door Solution

When you’re dealing with high end large doors, long conference tables and oversized casework, you need to deal with a reputable millwork company who is highly qualified and well versed in many Architectural Woodwork Standards which help to create high precision products. Being a member of the Architectural Woodwork Institute (AWI) is an excellent way to assure the woodworking professionals you are working with are knowledgeable and proficient in their woodworking capabilities.

The highest quality standard endorsed by the AWI is Premium, yet some clients have much higher performance and expectations which raise the architectural standards across the board. The architect is faced with specifying the standards the client desires, which may far exceed AWI Premium standards.

One such common request includes high performance expectations for components which AWI maintains low expectations.

For instance, if the client’s desire is to have a 12 foot tall wood pivot door with little or no deflection or door warp, there is no matching AWI standard. The standard for allowable deflection in a 7 foot tall door including warp, bow, cup, or twist is 1/4 inch. There exists no official standard for doors over 7 feet tall, and millworks and door companies are likely to require a signed waiver from the client signing-off on any expectations of warranty on any greater than 7 foot tall doors.

Even though 1/4 inch warp is recognized as a reasonable amount of deflection and allowable by AWI standards, in some cases the expectations of the client still remains. The architect specifies the desires of the client and it is up to the millwork company or door manufacturer to determine how it might be possible to create an enormous warp-free door of any size.

Fortunately, AWI members can reach out to AWI suppliers, like SingCore, who specialize in helping to design and create warp-free doors of any size, type or style.

The true-flat experts at SingCore are extremely proficient in creating warp-free panels of any size which can be structurally guaranteed not to fail or warp for 50 years. So, if the rest of the job is guaranteed for 10 years by the millwork conducting the work, then offering to warranty the entire job – including the large oversized doors – then becomes reasonable.

Prior to coming to SingCore one door company simply stated, “All large doors warp and cannot be guaranteed under any circumstances.” Now, thanks to utilizing the services of certified warp-free SingCore doors, the company can deliver the results according to the architectural specifications and expectations of the customer.

Not simply restricted to doors, the ability of SingCore to provide extremely flat large surfaces of any material that can be guaranteed to remain flat over time spills over into many other products and services.

Common surface materials include any available natural wood species, aluminum, brass, concrete, cold rolled steel, fiberglass, FRP, glass, hot rolled steel, HPL, Kevlar, LVL, MDF, stainless steel, veneer or any other commercially available flat material.

SingCore is increasingly being architecturally specified as the standalone solution for many large exterior projects where particular components are exposed to the elements as well as interior woodwork, panel work, partition work, casework and fixtures as supplied or manufactured for all types of buildings across many industries including retail, commercial, hospitality, industrial and high end residential industries.

You might be surprised to discover how more and more architects are specifying SingCore in their woodworking, metal, laminates, plastics, fabrics, design work, finishing and installation.

AWI members know if they are faced with a problematic large oversize project with challenges associated with insulation, weight, strength, high precision or high performance, reaching out and suggesting,

“SingCore Inside”

Is the only solution which can be guaranteed for 50 years.

“This is why we like working with AWI members,” says CEO and inventor of SingCore, Peter Sing, “They know how to work with our solution to their challenges.”

For more information, contact SingCore or AWI.


Hot Rolled Steel Large Sliding Doors