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The Best Sliding Doors

Sliding doors are the perfect way to complement to your home’s individuality. Sliding doors are ideal for smaller spaces, due to their space saving nature. Some sliding doors even slide completely out of sight and into the interior of the adjoining wall. These doors create a pristine and merely seamless entrance to any room. We are glad to provide you with the best sliding doors in the industry.

Sliding doors consist of one or more door panels that open by either gliding on a track or hanging from rollers mounted above. This style of door is very sensitive to weight, as the entirety is often hanging from the top of the door jamb. If the doors are too heavy, this can cause some serious and potentially dangerous issues. Sing Core have the solution to these issues.

Traditionally built sliding doors have a tendency to warp over time. That may not seem like a big deal, but it can make the door fall from its track. It is very dangerous when this happens especially when someone is nearby… Ouch! Whether your sliding door is a patio style door or a sliding closet door, its best to have it lightweight and truly flat for the entirety of its lifespan.


Sing Core provides the best substrate to make very lightweight doors that will remain truly flat for many years to come. With our patented technologies we can manufacture high strength, yet lightweight, sliding doors that last a lifetime.

Our sliding doors are among the best sliding doors in the industry. With our technologies, our doors tend to weigh roughly one third of traditionally built doors. How can we do this?

We use our patented torsion box honeycomb reinforcement along with our patented composite stiffeners to ensure a perfectly flat door for many years to come. Our technologies are always evolving to bring you the best doors in the industry. When you want the best, you have to work with the best. That’s why you come to-




Our company is devoted to providing only the best substrate for your door needs. Whether it is a luxury entrance door or a simple closet door, Sing Core has you covered. We manufacture the best sliding doors for existing homes in need of an upgrade and also for new constructions. Our doors will always enhance the aesthetic of any home.

Our technologies are so advanced that we guarantee every door for 50 years! No other door company has guarantee for even half of that amount of time. Usually, other door manufacturers will guarantee their doors for about a year; but shortly after that time, the doors will warp and potentially fail.

Why worry about your sliding doors?

There is no need to worry when you have Sing Core inside! Sing Core provides high strength and long-lasting dimensional stability so your door will be truly flat and last a lifetime.

We offer many different skin choices. Our choices range from concrete, metal, fiberglass, exotic woods, MDF, to even plywood. Click here to see our skin choice page. We specialize in custom doors, so if you do not see what you need just ask!


To order, go to our pricing page and fill out one of our pricing forms. This is the fastest way to get in contact our salespeople. Click here to go to fill out a pricing form.

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Pivot Doors in Luxury Homes

Pivot doors are among the most popular door we get requests for. Pivot doors in luxury homes are very common and are often over sized. Over sized is anything over the standard 3’ x 7’ door size. We supply the most high end and high precision doors to luxurious homes all around the world.

No one can do what we do.

For those who are not familiar with pivot doors-

Instead of the doors motion being controlled by traditional hinges, a pivot-hung door swings on a set of pins mounted in the top and bottom. The pivot door rotates on a pivot box in the floor and the top jamb rather than traditional door side hinges. This creates an elegant masterpiece that rotates effortlessly and usually no hardware is visible, except for the handle of course.


Pivot doors have many uses and can come in many different sizes. It is most popular to have over sized pivot doors that provide generous openings, but it is not necessary. Pivot doors are most commonly used as exterior doors, giving a beautiful and grand entrance to a home. They can also be used for interior doors. Whether it is to the bedroom, bathroom, or even laundry room pivot doors can add an elegant entrance to any room of your home. You could even have pivot doors for your closet!


We can make any size pivot door you may need and our doors are always built with the highest precision. We have perfected our craft so much that our tolerances are always within ±0.006”.
Our pivot doors are exceptionally lightweight, high strength, and always dimensionally stable.


Here at Sing Core, we always get requests for pivot doors. The majority of them are over sized. People from all over the world come to us with doors like this because we are the only door company who can make door of this magnitude last for many years. That is why we offer our-


A guarantee like this is unheard of in the door manufacturing industry. Usually, you will be offered 1 year at the most, but never 50 years. So if you need an over sized door, or any door, to last over 50 years, Sing Core has you covered. For more guarantee information, click here.


Sing Core’s patented technologies are always on the cutting edge of the door manufacturing industry. We are constantly working on improving our already state of the art technology. We can proudly produce large doors with great confidence that it will remain truly flat for the entirety of its lifespan.

We offer many different skin choices. Our choices range from concrete, metal, fiberglass, exotic woods, MDF, to even plywood. Click here to see our skin choice page. We specialize in custom doors, so if you do not see what you need just ask!


To order, go to our pricing page and fill out one of our pricing forms. This is the fastest way to get in contact our salespeople. Click here to go to fill out a pricing form.

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Standard Doors

Standardized Doors

Are you searching for the best interior door to put in your home? Well search no more! Sing Core offers only the best doors to fit your budget. Sing Core’s patented door design reduces weight, increases insulation, increases sound deadening, and will not warp.

Traditionally manufactured interior doors weigh almost three times more than a Sing Core door. Sing Core produces hollow core doors that provide much greater insulation qualities. Usually hollow core doors have an insulation value, or R value, of 2. Sing Core interior doors boast an R value of 6. With this being said, you can save on your heating bill and save on the cost of replacing your old doors.

Sing Core offers the highest quality of over-sized doors, but also provides the absolute best standard interior doors. Standard doors sizes are available in 30”W x 80”H or 32”W x 80”H. Standard interior doors usually have a thickness of 1 ⅜”. If the door you are looking for is not one of the listed sizes then do not worry, you can contact our salesperson and we can create a custom door just for you.

Currently we are offering our standard interior doors with a fiberglass skin. Traditional standard sized interior doors usually have a medium density fiberboard (MDF) skin or are solid wood. Both of these materials are very heavy, increasing the cost of hardware needed to hold the door. Our standard doors can be used with hinging, pivoting, or sliding hardware.

The standard interior doors are being sold as unfinished door blanks so that you may finish the door as you please. If you are searching for a new interior door, then you have come to the right place. Sing Core doors are among the lightest on the market. Don’t think for a second that we compromised strength to achieve such a lightweight door. Sing Core doors are significantly stronger than doors comprised of traditional materials, not to mention modern hollow core doors.

Sing Core is the only company that guarantees every door to stay straight and not warp for 50 years! No other door company can make such a claim. Our standard sized doors can be used with a wide variety of hardware. You can hang the door with standard hinges, a pivot box, or even make it a sliding door. Sing Core’s lightweight design allows you to save on hardware costs. There is no need for any specialty hardware to support a heavy door.

You could even apply a proper exterior finish to the door for use as an exterior door. The possibilities are endless! Sing Core can customize any door you need, in anyway you may need. Our doors can have a wide variety of skins; including, but not limited to A/B Plywood, veneer, wood staves, steel, aluminum, fiberglass, HPL, MDF, and much much more. For the fastest way to receive an estimate, please check out our pricing page! Just submit for a price quote and we will get back to you ASAP!

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Sacred Horizontal Grain Wooden Doors

Designate Sacred Space

12 ft tall horizontal grain walnut door

A wooden door can be used to designate sacred space. By orienting the wood grain horizontally instead of vertically, a clear separation between two differing domains is indicated. For instance, the “world” may exist on the outside of the door, while the inside space on the other side of the door is deemed as separate, protected, or sacred.

Feng Shui enthusiasts are attracted to wooden doors with Sing Core inside as entry doors, for the strongest doors are those which also separate two domains, that of the world from the structure’s interior, in a sense, keeping unwanted energies from intruding upon inhabitants.

This idea of preserving or honoring personal or sacred space is a concept which is fully embraced by inventor Peter Sing and his patented Sing Core technologies. This combination of horizontal oriented wood grain, superior strength, and sound deadening capabilities in a front door adds to the creation of a respectful barrier.

This method of creating separation is powerful and one can find clues to support the preferential dictates of such a door. Buddhist and Japanese barriers known as “kekkai” are low profile horizontal markers which indicate a barrier which should not be trespassed upon, and to do so dishonors those who have set aside the space on the other side of the maker as consecrated.

You might see these honorable markers on the ground, so as not to obstruct the view, such as a horizontally placed length of bamboo, rope, chain, or other material placed in this manner. In Japan, these barriers are more effective than fencing-off an area, without disturbing the symbiotic resonance of the surrounding environment.

The onus is on you to respect such a discreet boundary and to honor it yourself, just as evil spirits may. This horizontal kekkai may also mark an area as “private property.” Alternatively, a stone may be placed in the center of a walkway (this is referred to as a sekimori ishi) or garden path indicating that you are unwelcomed to pass into this particular area.

In some traditions, chopsticks are placed horizontally between the meal and the recipient of the meal as a boundary separating the host (he or she who would partake of the meal) from the sacred gift (the food).

In this way, a horizontal wood grain door with Sing Core inside fully supports these philosophies and are increasingly being found in spiritual applications in temples and other sacred spaces.

An added benefit of using horizontal wood grain on your large entry door, is that it is a responsible use of natural resources, as a very tall door (over 10 ft tall) would require special considerations as very long lengths of natural wood are often difficult to find and might require the sacrifice of an otherwise healthy, growing tree. Plus, as custom door builders know, solid wood will move, warp, and crack, unless the door has Sing Core inside.

16 ft. warp-free horizontal grain teak front entry door

For exterior doors, it is generally advised to use a little more material because wood veneer is too thin to offer much protection, is easily damaged, and may be difficult to repair. While a layer of wood (referred to as wood stave) which is between 1/8th of an inch and 1/4-inch is about perfect for any door with Sing Core inside. You might be surprised to discover that 1/8th-inch wood stave is far more dimensionally stable and looks like solid wood.

Exterior doors made with Sing Core inside are guaranteed not to warp, bend, twist, or otherwise fail for fifty years. No other door can offer such a guarantee, further sustainably honoring you and your sacred space.

3x warp-free horizontal grain hemlock doors 14 ft tall

Horizontal oriented wood grain honors the sacredness of Mother Nature’s gift of wood, maximizing its benefits to the world, while offering a sacred protection adding to safety, security, and peace of mind to you and yours. Elements difficult to find in any ordinary large entry door.

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Unique Exterior Doors

Unique exterior door can be the detail which makes any project come to life. Certainly, the most impressive detail which leaves the most lasting impression are the unique front doors which are appearing in the most significant contemporary architecture and designs.

High end custom architectural doors are sprinkled throughout all the latest emerging structure designs as not only attention grabbing unique front doors but are included as a unique home designs security door which add to the appeal of the vast array of unique exterior doors appearing across the most modern architectural designs.

Leading the pack, are the designers who push the envelope of size and materials. While extremely large doors command the lion’s share of the most attention commanding performances, there are many kinds of unique front doors and another emerging technology includes the unique home designs security door, where Sing Core is playing an important part.

These doors may look unique at the surface level but far more unique goings on have taken place deep inside these doors, so what’s happening inside these doors is far more unique than was observable with the naked eye.

Inside the unique front door décor you will find inventor Peter Sing’s patented “Sing Core” along with other patent and patent-pending anti-warp technologies hard at work to keep these doors perfectly straight and true, regardless of what challenges they might face.

Whether you’re looking at individualized high security impact doors or unique storm doors, Sing’s core delivers not only warp-free door tech but also imbues these doors with other satisfying characteristics, such as being fully insulated to provide sound deadening and climate control. These are exciting features which can be found from installing a door with Sing Core inside.


Your unique front doors can possess all these exciting attributes found inside the highest quality architectural doors across the nation and the world, just by having your architect specify Sing Core doors.


Sing’s patented core technology enables his factory to pump out solid hybrid door blanks which weigh in at a fraction of the weight of other wood-based solid core doors. Rivaling the weight of a hollow core door which has virtually no strength, tends to warp and is damaged easily, Sing’s substrate, while extremely lightweight is not weak. In fact, the strongest and straightest lightweight doors in the world, have Sing’s core inside.

13 foot lightweight panel strength peter sing core


Talk about strength, Sing’s invention has allowed the biggest and best door companies, millworks, and custom door manufacturers to design and build enormous oversized large doors, that are lightweight (see above) and extremely strong. In fact, independently rated at 660+ PSI, Sing’s core is stronger than steel pound for pound, yet very lightweight. See inventor, Peter Sing, standing amidst a 13 ft. span of a one-inch panel with little or not deflection. Any other material would have crashed to the ground.


Among high-end, scientific, and military circles, Sing’s core is the only known method to build a lightweight warp-free door of any material known to man, especially if the door sis very large, or features a natural woodgrain material (which is the most notorious for moving in response to changes in the environment). That’s why you’ll find Sing’s core in use anywhere from beneath the sea (US Navy) to outer space (NASA) and anywhere in between. Sing is so successful at building warp-free doors and other products that he offers a 50-year warp-free guarantee.


While standard project allows for give and take of available building materials, such as AWI Standards’ allowance for ¼” variance at any time or location amidst a standard-sized door (7 ft. tall or less), Sing’s core hosts the highest tolerances (+/- .006 in.) enabling you to build high precision unique doors of any kind, whether made of wood, synthetics, or metals, even stainless steel.



While most end-users who seek out Sing’s core are looking for something lightweight that doesn’t warp to solve existing issues which have arisen in a current project, having a product to build such a door that is fully insulated offers a huge advantages, even if it wasn’t your primary focus when you first sought out the Sing Core solution to solve your door problems.


Whether for security reasons, studio separation, or just privacy and peace of mind, Sing’s sound deadening door core is the way to go when attempting to address issues related to sound transmission. Sing Core is routinely used in the manufacture of soundproof doors because it can bear the weight of dense and heavy sound proofing materials without fail.


Unique front doors can also offer smart climate correction which can be offered by a door which is fully insulated but still not be compromised by exposure to the elements. Sing’s patented climate control door core is used in refrigeration, heat and moisture exposed applications (like saunas) and can still outperform other available Eco-friendly lightweight building materials in side-by-side comparisons.


You don’t have to be in a high-security environment, a government or military facility to appreciate the added safety and security of having a unique front door with Sing’s core inside because a door should be more than just visual separation, you should be able to feel safe on your side of the door. Inventor, Sing, says, “If you kick a standard 6 panel door, it will crash. If you kick my door, you will break your leg.” That is to say, you will break your leg before you can break Sing’s door.


Sing’s door substrates are manufacturing using the strictest Eco-friendly methods of manufacture. They are made with little energy, feature recycled materials, extremely responsible use of natural materials such as wood fiber and Sing uses formaldehyde-free adhesives, while producing no toxic material waste. Sing’s substrates have an extremely small carbon footprint even though they are shipped around the world because their transport costs less and consumes less fuel due to being so light weight.

That’s just a few of the reasons why more architects are specifying Sing Core inside their doors.

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Wide Front Door

You think your customer is asking for a wide front door when it’s 42 inches wide, but what about when your architect specs a door that is 25 ft. wide and 10 ft. tall? If 42 inches is a wide front door, then a 25 ft. wide slider would be considered an extra wide front door at the very least.

According to the millwork that installed a pair of these 25 ft. wide warp-free wire-brush-finished white oak extra wide doors, they weighed-in at “a couple hundred pounds apiece,” and like so many other millworks and door companies proclaim,

“We couldn’t do it without Sing Core.”

Sing Core is the place where contemporary architecture and design of the wide front door comes to life, and you will find wide front doors all over the most amazing locations throughout the USA and the world, even atop the highest building in the United States, the World Trade Center. And they just don’t come here for ideas and inspiration for their next wide front door, they’re looking for a way to make it happen. And by “make it happen” we mean,

How to build a wide front door that will not fail

We bring the visions of those modern architects and their architectural door creations to life in a way that will not embarrass them down the road (like at the next climate change), when doors will warp, twist, bend, cup, otherwise compromised or become completely inoperable.


There are optical illusions which make a front door look wider, such as adding sidelites on either side of the door which makes it look much wider, but the part of the door that opens, is a normal width door. What if that entire area articulated like one wide front door. That’s a solution provided by Sing Core that can be an option for you or your clients, such as the Sing Core Side Light Door. It’s quite impressive when the whole area, including the sidelights open with the door, moves when the door is opened or closed. This is a most impressive effect when used as a wide pivot door.

Another idea which is gaining traction in contemporary architecture is to use a wide pivot door but include an embedded man door which articulates via side hinge. Man door access doors get used for normal egress use and when you really want to impress your audience or guests, operate the pivot door and the whole front area pivots.

If wide doors were not wide enough, consider that modern architecture designs are adopting a double wide front door approach to standing out and making an artistic and attention-grabbing presentation with elegance for your extra wide exterior doors.

In this respect, when your wide doors have Sing Core inside, you can express full creative expression as virtually any custom contemporary wide front door could take on the look and feel of any artistic representation.

Your project, for instance, could feature an extremely wide front door made of nearly any available flat building materials, such as acrylic, aluminum, brass, copper, cold rolled steel, fiberglass, Formica, FRP, galvanized steel, HPL, hot rolled steel, Masonite, Stainless Steel, or any available natural wood species.

Of all these types of doors, normally, natural wood grains present the greatest number of challenges associated with warping, especially with wide front doors. Yet, if made with Sing Core inside, these doors can be guaranteed to remain

Warp-free for 50 Years

Only doors with Sing Core inside can be guaranteed not to warp, bend, twist, cup, or otherwise fail (including delamination) for 50 years.
It’s no surprise that you will find Sing Core beneath the sea (US Navy) in outer space (NASA) and everywhere in between, from coast to coast, though admittedly, more than 70 percent of all the wide front doors we ship, from our serene wilderness factory in the Pacific Northwest, ship to the greater New York area, mostly New York City. We lovingly refer to NYC as our sister-city.

Get a Price Quote today.

Lots of Photos of Wide Front Door

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Oversized Exterior Doors

Oversized exterior doors are a challenge for any door manufacturer. Oversized exterior doors can be very large and can run very heavy. These big doors require heavy duty extra strength exterior door hardware to accommodate such a weighty door. Other problems include difficulty to transport and install due to the size, stress and strain on the hardware and the structure, and the likelihood of warping at the next season change, if not before.

Now you can fully enjoy these large spanning exterior doors which are fascinating and compelling as they garner the attention of anyone who encounters the beautiful oversized front doors without any of the headaches, thanks to inventor Peter Sing’s Sing Core.

Utilizing Sing ‘s patented and patent-pending oversized exterior door blanks, the biggest and best door manufacturers, millworks, and custom large door builders are able to design and build oversize exterior door products which will not fail.

Sing’s high-quality custom front doors includes a highly diversified selection of exterior doors designed for larger and more specialized applications in educational, scientific, industrial, and military channels, where high performance, attention to detail, safety, security, longevity, and sustainability are highly valued features.

The perfect exterior doors are Eco-friendly, lightweight, high strength, fully insulated, high precision, and guaranteed fail free for 50 years. Sing offers a full 50-year warp-free and structure guarantee. That’s fifty years of maintenance-free enjoyment of all your oversize exterior doors, which have Sing Core inside.

Spanning the vast variety of exterior door styles, your exterior single door, double door and doors of enormous size can feature any available flat building material, such as aluminum, brass, cement, cold rolled steel, concrete, diamond plate steel, fiberglass, Formica, FRP, galvanized steel, hot rolled steel, HPL, Kevlar, Masonite, stainless steel, and any available wood species.

Large modern front doors are fiberglass and steel exterior doors which seem to be standard fare among the large exterior door manufacturers, but thanks to Sing’s core, front doors and exterior doors and now be made of nearly any building material, even solid wood stave.

While fiberglass exterior doors are the standard response to exterior door applications, followed by hybrid steel and wood doors, thanks to Sing’s door core which is specifically designed for oversized exterior doors, any front and exterior door can be made of natural wood grain.

While Sing Core does not actually build doors, they do empower door manufacturers and millworks who design and builds wood doors and panels to your exact specifications the ability to make any door of any material and guarantee such door to remain warp-free for 50 years, guaranteed. The structure strength is also covered including not having to worry about delamination as well.


The result is you’re being able to enjoy all the elegance of solid wood entry doors, without any of the stress or stain associated with exterior doors which plague those who must deal with them endlessly over time, saving both time and money associated with regular maintenance.

Your wood entry door could have Sing Core inside, as well as each entry and patio doors, which is the perfect fit for any exterior or custom door, from exceptionally large foyers to commercial steel doors all with Sing’s comprehensive 50-year guarantee, as is the case with all of Sing’s entry and patio door products.

Even large entry doors, like these large red church doors, which are 100% exposed to the weather, replacing the regularly failing oversized 6-panel entry door system, are now able to operate as storm doors which are virtually weatherproof security doors while still retaining the appearance (or “feeling”) of the original 6 panels entry doors. This effect was achieved by adding molding to the oversized exterior flush doors prior to applying primer and paint.

Regardless of your large opening door systems, you can rest assured that you can have a 50-year guaranteed no fail exterior door system featuring the highest quality custom entry doors by contacting your favorite door manufacturer, millwork, or large custom exterior door builder, and specifying that you want, “Sing Core inside.”

Sing’s True Flat Team works in tandem with your supplier to provide you with the high-quality wood and fiberglass front doors that make the best oversized exterior doors, and many other endless applications as well.

Exterior Doors Gallery

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Exterior Steel Double Doors

Exterior steel double doors are an impressive way to adorn any major egress point, especially as the double front entry doors for a durable steel front or garage-to-home entryway. Exterior steel double doors are most commonly used as entry and patio doors in the most contemporary architecture and design of exclusive high-end homes.

Exterior steel double doors may feature large lite openings for glass inserts to create the French door look in the double door system, which can add an elegant element to a more industrial design style. In fact, you can specify any glass exterior steel doors, just send us your drawing.

As you might guess, solid core exterior steel doors extremely heavy and the weight could cause problems with transportation, installation, hardware, stress and strain on the structure translating to huge maintenance costs over time.

You could build a lighter weight version, using a foam or honeycomb core, but if your looking at anything over 7ft tall or 3 and half ft wide, you will have a lightweight but unstable door. That’s where inventor Peter Sing’s patented and patent-pending exterior steel door substrate comes in.

Sing’s invention enables metal door manufacturers to build lightweight exterior steel doors that are fully insulated (R3.5 to R6.5) for climate control and sound-dampening, stronger than solid steel pound for pound, incredibly resilient (660+ PSI), high precision (.006 in. tolerances), and can be guaranteed not to warp, bend, twist, or otherwise fail for 50 years. There is no other way to accomplish all this.

Steel exterior doors could present even greater problems because one side faces the elements while the other side faces the structure’s interior, a certain recipe for failure, unless your steel exterior door has Sing Core inside. To make matters potentially worse, multiply the potential for problems times two in the case of exterior steel double doors. Admittedly a single door will present half the problems of exterior steel double doors.

Sing Core is the source of energy efficient Eco-friendly commercial steel double doors the world ‘round. Even so, the majority of Sing’s double door steel doors are found in the greater New York region. You may be surprised to find that your Sing steel double door originates from the serene Pacific Northwest in the heart of Washington state, are proudly made in the USA by local artisans of locally sourced materials, ensuring you the best exterior double door system.

Whether you’re looking for a single door entry door with insulating core or a sustainable steel patio pre hung double door, having your doors made with Sing’s patented exterior steel door blanks as the basis of your door can put you miles ahead of the other steel doors available today.

The largest door manufacturers in the world come to Sing’s True Flat Team when they are faced with a project featuring one or more large oversized exterior steel doors knowing it is the only way to guarantee customer satisfaction over time. While there are many ways to build average-sized steel doors with little threat of failure, those big exterior steel doors are problematic and are routinely excluded from the warranty which covers the remaining of the steel door schedule.

Only Sing’s premium steel doors with high definition panels inside can deliver such lightweight, high precision, and long-lasting life and satisfaction, all backed by his 50-year warp-free and full structure guarantee.

That said, many pre hung exterior steel 6 panel double doors have Sing Core inside and the end user way never even know. All they know is that their modern steel door company has provided them with oversized insulated exterior steel doors which are not excluded from the other steel doors covered by the steel door company’s warranty.

Sing Core is a key provider to government, scientific, law enforcement, and military for superior steel exterior security doors used in a variety of applications where safety and security performance is of the highest importance. When safety and security matters, you want a steel security door or steel double door which outperforms other exterior steel door entry doors in terms of sound deadening, impact resistant, bulletproof, and blast proof. Note, inventor Peter Sing says, “You kick my door, you break your leg.”

Sing’s commercial steel double doors are by far the best of class in insulated exterior steel doors and are available in prehung exterior steel 6-panel double doors as well.

Isn’t it time all your doors had Sing Core inside?


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Exterior French Doors

Exterior French doors are increasing in popularity because they encourage a natural connection between a structure’s interior and the great outdoors, especially if maintaining such a connection increases quality of life by being able to enjoy the visual impact of scenic surroundings or for other reasons, such as safety and security.

They are fashionable, can be unique, and framed with attention-grabbing materials such as natural wood grains for that classic look, or metals for a more industrial appearance. Exterior French storm doors may be made of weatherproof materials, such as fiberglass-related products.

What makes a door French, is the inclusion of a large glass cut out equivalent to one-third or more of the door’s surface area. The glass opening is what makes this design so attractive to those who love them.

When a little privacy is desired, a curtain or blinds may be hung and released to cover the otherwise transparent opening of the French door’s glass, though French door glass may also not be transparent and could range from anything opaque to frosted, or stained glass, and may even include a one-way mirror, depending on the application.

Double French Doors Exterior

The greatest impact from an exterior front door access point is by installing double French doors exterior facing entryways. These particular double French entry doors are not standard off-the-shelf French front doors. That means, you specify the characteristics you want to see which adds so much value and curb appeal to your double French Doors exterior.

You can choose from any available surface material, such as any natural wood grain, aluminum, brass, concrete or cement, cold rolled steel, diamond plate steel, fiberglass, galvanized steel, hot rolled steel, Kevlar w/Lexan, Masonite, or stainless steel, just to name a few of the nearly endless possibilities.

French front doors are definitely leading the pack in contemporary architecture and design by adding more material to otherwise just plain glass openings for added artistic character.

Warp-free French Doors

While an exterior French door is exposed on both sides to varying climates (one side facing the exterior and the other the interior) this is a certain recipe for door failure due to door warping. That is, unless your French entry doors have Sing Core inside.

All wood French doors exterior are guaranteed to remain warp-free for 50-years, personally guaranteed by inventor/president Peter Sing. Sing’s patented and patent-pending warp-free core material for external French doors is especially designed to prevent any wood French doors exterior from warping.

How to Get French Doors with Sing Core Inside

You can get them from any location that features exterior French doors for sale near you. Though the retailer must have a service for supplying “custom French doors.”

That is, to say, they already have the partners, such as millworks and custom door manufacturers, whom they work with to have their custom French door built for their clients.


Because Sing Core does not build doors. Sing Core does supply the world’s biggest door companies to build doors of enormous size while providing their customers with a 50-year warp-free guarantee (or at least their standard door warranty on doors which are usually excluded from the warranty due to their size).

So, Sing Core works hand-in-hand with your favorite door company’s custom door manufacturer or millwork to provide you with the best prehung exterior French doors in the world.

If you were to order any Exterior French Doors directly from Sing Core, you might be sorely disappointed, as Sing Core provides the millworks and custom door manufacturers with the raw, unfinished materials to make the best and most beautiful large French doors ever, with the most extraordinary 50-year guarantee in the industry.

It takes a specialized team to build the best exterior French doors in the world, and Sing Core is the only way to do it with the highest precision, and highest performance over time, guaranteed by president and inventor Peter Sing