Kate Miller No Comments

Sliding doors at Laserfiche’s New Headquarters

Sing Core is honored to be part of making an innovative workspace for Laserfiche in Long Beach, CA.

RDC of Long Beach California designed these doors to work seamlessly with this interior workspace. Following the design of RMC, Seeley Brothers Millwork of Brea California used four custom made Sing Core panels to complete this project for Laserfiche.

These Sing Core sliding doors are used to allow these workspaces to feel like one larger room and a second later be a quiet and private meeting space. Sing Core doors naturally dampen noise of an active workspace to easily allow other employees to concentrate and be more productive. These were some of the core ideas that Laserfiche had when building their new Headquarters.

These elegant lightweight doors are extremely strong and durable. They are made of the highest quality material suitable for any museum, mansion or workspace.

As you can see these doors have to be completely straight to allow a perfectly matched seam when they are closed.

“They are the most exciting sliding doors I have ever seen” -Peter Sing, Sing Core inventor.

Simple to design, simple to order. See the shop drawings here.

See other sliding doors here.

Want these doors in your next projects? Get an estimate here.

We’d like to thank everyone that came together to make these magnificent doors come to fruition: Studio One Eleven, RDC Architects, Millie and Severson Contractor, Seeley Brothers Millwork and of course Laserfiche for wanting to improve their employee’s wellbeing with this innovated design.

Laserfiche is a leading global prover of business process and information management software. They have been part of the Long Beach community since 2001. They were founded over 45 years ago and also have offices in Washington DC, Guadalajara, Hong Kong, London, Shanghai and Toronto. 320 of the 425 employees are in the Long Beach area and they are steadily growing.

Their new headquarters was completed in May of 2022. It is over 100,000 square feet, with four floors and a parking garage. It can accommodate 550 full-time employees working in-office and up to 750 hybrid workers. Studio One Eleven’s design mirrors a landmark garden-office building across the street designed by the late Mid-Century architect Edward Killingsworth. They incorporated such Mid-Century Modern elements as large windows and terrace decks that provide amble natural lighting. The height is the same as the adjacent building allowing to blend in seamlessly. Chris Wacker, chief executive of Laserfiche, Wacker called the space “extremely functional and useful in a hybrid environment.”

The design layout shifted the service core to the western edge of the building, typically in the center. This allows a larger continuous communal and workspace environment. This also blocks the western solar heat. Now the elevator is tucked away and the stairs are front and center, promoting the healthier option of taking the stairs.

Laserfiche was committed to staying in the Long Beach area and are in the Bixby Knolls neighborhood. Here on Long Beach Boulevard near the San Diego Freeway, their Mid-Century landmark makes a bold statement to the half a million daily drivers who pass by. Before Laserfiche purchased this land, it was considered an unusable wasteland left over from oil extraction years. They capped off the old oil wells and removed the old hazardous tanks.

According to Chris Wacker, Laserfiche CEO, “We have abandoned the traditional vertical office building paradigm, emblematic of individual aspiration, for a horizontal environment where connections are fostered and relationships built and we’ve implemented ideas from our products into the design of the building we know that process automation makes life easier. It removes the bottlenecks and impediments to fluid operations, promotes efficiency and allows organization to thrive. This building’s open design does the same thing. It enhances the free-flowing information making our lives simpler and more creative.”

“This building is the future of work. People sharing spaces in the ways most productive for them. As we learned over the past two years, that makes the most productive for the company and the people that use our products. Just as Laserfiche is dedicated to helping people turn their data into digital assets, this building helps Laserfiche maximize the potential of its people. Laserfiche digital transformation increases your people power by eliminating the unproductive and focusing on the creative, and that’s what this building does. It’s a hybrid workspace for a hybrid workforce.”

Watch this video for a deeper look into this project from RDC.

Sing Core is proud to be a part of the continued evolution of door technology to make our customers’ lives more enjoyable. Whether that be in pivot doors, sliding doors, hinge doors, pocket doors, or any oversize door. We enjoy the challenge. We invite you to GET AN ESTIMATE and see for yourself how Sing Core’s true flat door cores can help you make the doors that your customers are asking for.

Thank you RDC and Studio One Eleven for the use of your photos and video.

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

Lightweight

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

Straight
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.

 

 

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Why We Trust Sing Core

You might ask why the biggest and best door manufacturers, millworks, and architects trust Sing Core to help them deliver the best large doors in the world to their most discriminating clientele? I know we do. So, here’s the answer:

We Trust Sing Core to help us deliver:

1. The Best Solid Wood Stave Large Doors
2. The Best Large Veneer Doors
3. The Best Big Fiberglass and Laminate Doors
4. The Best Large Paint Grade Doors
5. The Best Large Aluminum Doors
6. The Best Large MDF Doors

They also enjoy these incredible features:

1. Lightweight
One-third or less the weight of other doors

2. High strength
Stronger than steel pound-for-pound

3. Fully Insulated
For sound-deadening and climate control

Did someone say "High Precision?" This is a 16th inch groove in an 8th inch skin.

Did someone say “High Precision?” This is a 16th inch groove in an 8th inch skin.

4. High Precision
+/- .006 in. tolerance for precise projects, like this 16th inch groove in 8th inch skin (photo above)

5. True Flat Team
For specialized anti-warp and advisement

6. 50-Year Warp-free Guarantee
Covers warp and full structural (including lamination)

This is no accident. Our best customers know that the only way they can provide the best big doors to their customers in to have Sing Core Inside.

Now, not everyone in the world wants to have the ultimate best big door in the world, but if you do, you might want it to have Inventor Peter Sing’s patented Sing Core inside, so you can enjoy years of worry-free enjoyment from the only door that is covered by Sing’s personal

50-year Warp-free Guarantee

You have never heard of such a guarantee on big doors (especially big wood doors) before because before the invention of Sing Core such a thing was impossible.

And our best clients? They say,

“There is no other way to do it.”

They trust Sing Core because to date, they have not had one claim or return, and you won’t either, if your door has Sing Core inside.

For years, Sing Core has been the trusted resource for the biggest and best large door projects, offering patented and patent-pending solutions that are solid as a rock, yet very light, and stronger than steel pound for pound. Inventor Peter Sing backs his high-end solutions with his 50-year fail-free guarantee, which can be found in

The best and biggest bold, beautiful doors with Sing’s core inside do not fail. Architects and designers trust Sing Core to deliver the best doors for their projects, especially those extremely prestigious structures and applications.

What do they trust Sing Core for?

High strength garage door, finished by Artistic Doors and Windows. When building a specialty door like this, you want it to last.

The Best Solid Wood Stave Large Doors

Solid wood stave presents the biggest problem for large doors due to the natural tendency for a thick piece of wood to respond to its environment by moving. This is not too bad for normal-sized doors, but once you get over 8 ft. tall, you start finding trouble everywhere you look, unless your solid wood stave surfaced door has patented Sing Core inside. Then, it will not move.

Some wood species are more prone to warp than others, so Sing’s True Flat Team goes to work integrating the interior design of the wood stave door with additional anti-warp tech inside the door to compensate for stronger wood grains.

Other large wood door manufacturers offer a one year non-warp warranty, while patented Sing Core comes backed with a full 50 year non-warp and structure warranty.

The Best Large Veneer Doors

When it comes to thin veneers (which can be paper-thin) we have trusted artisans do this work, because we believe that this level of expertise requires that extra finesse to achieve the desired results. Our doing the veneer-piece is actually quite rare because the bulk of our veneer door responsibilities is supplying the many millworks and door companies with the warp-free high precision core for them to apply their own veneers.

This type of work is so sensitive that we only trust the people who are highly specialized in veneering (and that is all they do), so they are quite expensive. We do not want to compete with our own clients. We only use the best veneer craftsmen to work on our clients’ doors. They source the best veneers available in the USA via their suppliers.

If you have a millwork near you that specializes in hot press veneer, we can work with them, if you trust them. Most of our veneer substrates are delivered to millworks who are qualified to to this type of work. Let the experts do the high end jobs.

 

The Best Big Fiberglass and Laminate Doors

Whether you are looking for an oversized fiberglass door, FRP door, Formica door, Masonite door, Wilsonart door, or HPL door, Sing Core has what it takes to keep your door straight and true when it’s most important to you. The sky’s the limit for your creativity when using these incredible source materials that come in a huge array of colors and designs. And with Sing Core inside, you never have to worry how big your project is.

Patented and patent pending Sing Core has the strongest most lightweight structure for any challenging skins to build all types of doors. Sing Core owns the largest press to take on any otherwise too complicated to consider large door task.

The Best Large Paint Grade Doors

What do you do when you are remodeling your hotel and you need 700 full length floor to ceiling doors that will not warp in a snap? Of course, you call on Sing Core who can turn around an order, like this, in 72 hours. Sing Core ships them to your finishing site, where you have them prepped and painted, and you’re good to go. 700 big worry-free paint grade doors in 72 hours. Not bad. When do you want yours?

Sing core door panels are made of the strongest, lightweight Sing Core with skin made of 1/8 inch MDF and 1/4 inch plywood as skins to provide the most smooth and structurally sound double-layer skins which provide the most lightweight, stable, structure strength, and smooth surface for painting high end doors.

Bulk Orders get priority handling and save more per door than any other method.

 

The Best Large Aluminum Doors

Architects and designers trust Sing Core’s ability to match their warp-free core with the best metal fabrication techniques for the perfect metal doors. While huge Aluminum doors with Sing Core inside are our most in-demand of all big metal doors, Cold Rolled Steel, Hot Rolled Steel, Galvanized Steel, and Stainless-Steel doors are not far behind.

The Best Large MDF Doors

For so long, MDF has been a difficult material to work with because it is so heavy and not very stable, but engineers and high-tech artisans love it because it is so supremely smooth. This attracts and commands the attention of the most creative artisans in search of the perfect large door canvas. Can be used for 6 panel door, or any other kind of door including French doors with glass cutouts. Sing’s core makes these doors much more manageable by greatly reducing the weight, while increasing dimensional stability, even on enormous doors, and these take advantage of Sing Core’s +/- .006 tolerances.

More than 60% of our big MDF door substrates ship directly to millworks and hot pressers who do their own veneer. Our MDF is so smooth, you can do high precision veneer without having to crossband. Other MDF doors are double to three times heavier or more so with much less structural integrity.

Sing Core MDF doors are the strongest, lightweight and high strength doors in the door industry. We are able to manufacture any type of style, or custom designed door with or without light openings. Even 6 panel doors at a low cost if in large quantities. This service is designed to work with door companies or or mill works that are able to take our door panel and add molding if necessary, expertly finish, and install hardware.

Working with our team, you will be able to build the best door in the USA.

If you are considering sourcing the highest precision, strong, lightweight, non-warp and nearly unlimited variety of design possibilities.

Other Popular Large Door Types

When it comes to architectural doors, you never know what is going to slide across the design table next, but Sing’s True Flat Team is there, ready and waiting, for the next challenge. Some of our most interesting doors that have come up lately include huge Stone Veneer doors, Butcher Block doors, Cement Board doors, Specialty Hardwood doors, even Concrete, and Ceramic doors.

If you can dream of it, Sing Core can help bring your huge door vision to life, guaranteed.

If you buy a door of any size and it is made of Sing Core and any other exterior skin, the Sing Core True Flat Team and the artisans who work in concert with the team to present the recipients with a warp-free large door that will meet or exceed AWI specifications, fully backed by Sing’s 50-year guarantee that means you have a door that will not warp, bend, twist, delaminate, or otherwise fail for fifty years.

This guarantee was unheard of in the industry, especially for large doors which traditionally were featured as exclusions from standard warranties because inherently they would fail and require service not long after installation (eliminated even from the most rudimentary 30- to 90-day standard warranty).

In fact, until recently, the largest door companies have turned away large door business in recent years, because, according to them,

“It’s just not worth the hassle.”

And they encourage the developers and contractors to find a high-end millwork or custom door maker to build the large doors in the project. These highly skilled craftspeople did the best they could, until they discovered Sing’s patented lightweight high-strength patented core.

Then, all of a sudden, they were building the most beautiful largest doors with incredible ease and without the heavy burden of having to service the fail-free large doors. In fact, they proclaim,

“There’s just no other way to do it.”

Now everyone, even the large door companies, are getting back into the oversized door game again, because they trust Sing Core to have their back when they most need it, from the inside out.

Make sure your next high-end door has Sing Core inside.

 

 

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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From the Best Log Homes to the Best Doors

You might like to know how Sing Core, well-known for the most efficient, Eco-friendly and sustainable log homes in the world became such a big deal in the door industry, especially for large, oversized doors. Starting in the log home market, Sing Core has been used in many applications besides doors, such as floors. raised floors or stage floors, ceilings, walls, room dividers, tiny house, museum, trade show displays,  furniture, fine cabinetry, tables, and desks, etc.

The Only 50 Year Warp-free Guarantee and full structure warranty

Sing Core’s Sing Log Homes are highly regarded as the best log homes in the world due to the patented technology of Sing Core as applied to traditional wood logs resulting in the only insulated logs which would not warp, twist or crack; nothing short of revolutionary in a market that was constantly challenged by Mother Nature throughout the entire build and life of the log home structure.

 

Google search for Sing Log Homes and see for yourself.

It all started with the decline of the log home industry, in combination with the request of several patented Sing Log Home builders insisting that their large doors also be made with insulated Sing Core. At about the same time, people started inquiring about the possibility of using patented Sing Core without the log configuration, and the Sing Panel was born.

The main attention-grabbing draw of the Sing Panel was the best of two worlds; patented vertical grain torsion box/rigid recycled foam composite sandwiched between two stress skins with formaldehyde-free adhesive. Institutions, like NASA and branches of the United States military and research labs across America quickly took notice and started researching Sing Panels for a wide variety of applications.

The resulting Sing Panels were lightweight, extremely strong and had tremendous shear strength and resistance to deflection, something that almost challenged the law of physics in building materials. Sing Panels were independently tested in university laboratories and rated at 660 PSI and up (compare that to the 10-to-110 PSI of other honeycomb materials used in aerospace industry), depending on the configuration.

Now, large doors, extremely large doors (up to 50 ft. or more) could be made using this new patented building material… and no one knew how valuable a resource this would be to the entire door industry.

Before long, more and more people were realizing that doors made with Sing Core inside were out-performing AWI standards for door warp over and over again, setting a new standard for warp resistance.

5o-year Warp-free Guarantee

Based on a combination of independent research, scientific method, field studies, the introduction of a new stiffener technology (patent pending), and experience, Sing Core was able to deliver doors with the highest degree of precision and performance backed by an unheard of 50 year guarantee, which states:

Sing Core guarantees certified professional doors of any size not to warp, bend, twist, cup, or otherwise fail – including full structure warranty – for 50 years.

Of course, in order to be professionally certified, the True Flat Team at Sing Core must be involved with the design of the door and the door will only be guaranteed for the use for which is was built for because different applications require different approaches to assure their 50-year performance.

Widely renowned as the best way to build the best large doors in the world, it is not uncommon for people to think that Sing Core builds doors. This is not true.

Sing Core does not make doors

Sing Core does not make doors, yet the best large doors in the world are made with Sing Core inside.

While Sing Core does not make doors, we do supply the best ready-to-build architectural door materials which are shipped directly from our factory to the millworks, door companies, and custom door manufacturers who add the finishing touches to the Sing door blanks.

The resulting Sing Doors are the culmination of a team effort from the architect, designer, engineer, millwork, fine craftsmen, and Sing Core’s True Flat Team. It is only due to their combined efforts that Sing Core looks and performs so well when it is enjoyed by the end user.

The part patented Sing Core plays in the door industry is similar to jet engine manufacturers in the aerospace industry. Jet engine manufacturers do not build their own aircraft, likewise, Sing Core does not build pivot doors, we only supply the warp-free substrate used by pivot door manufacturers to build lightweight, high-precision doors that do not warp.

Latest in Pivot Door Technology

The latest area of expertise where Sing Core shines through among the door industry is in the area of pivot doors. Pivot doors are unlike regular hinged doors in that they are traditionally larger, thicker and heavier than other types of door. Plus, they only have two points of contact for anchoring, unlike a hinge door. (Hinge doors can help to minimize warp to some degree by adding additional hinges or hardware to help keep the door straight.) Not so, with pivot doors.

We do provide lightweight, high strength and warp-free components to build the best pivot doors. Click to See How this Works

We want to help you expand your high end pivot door business, like this 38.5 million dollar estate.

Our stock items are warp free with structure guaranteed 4×8’, 3” thick pivot door blanks for $499 each ($2500.00 value).

Our latest foray into the world of pivot doors has been wildly successful, which also allows us to have access to the latest in pivot door technology, such as the new FritsJurgens hidden pivot door hardware.

See: Breaking News: Concealed Pivot Door Hardware

Large Sliding Doors

Our growth in pivot doors is growing to meet the volume of large sliding doors that we provide to an industry where keeping the door straight and true is also of great importance. For what good is a sliding door, if it is warped and unable to slide?

This can be particularly problematic when dealing with bypass sliding doors or pocket doors.

In any case, if keeping your doors straight and true is of primary importance in your project, there is only one way to build a door which can be guaranteed not to warp, bend, twist or cup for 50 years… and that’s to have,

“Sing Core Inside.”

Sing Core panels have been used as sliding door core, hinge door core, and French door core with guaranteed non-warp and full structure warranty for 50 years. You, too, can have the best guarantee serving the door manufacturing industry.