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This is our Garage Organizer. Using sing honeycomb panels you can order exactly the pieces that you desire to get your garage ready to work in, or just get it cleaned up! With a Lifetime structural guarantee. Northwest Cedar with a natural Eucalyptus inlay and Birch sides. |
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Style Large Drawer Size Small Drawer Size Side Panel Sizes Big Horizontal Panels Small Horizontal Panels Color |
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Call to order (360) 495-3577 Or Fill out the contact form |
Custom Door Skins
Custom Door Skins by Sing Core
Custom Door Skins Build your Way. Strong. Light. Straight.
Custom Door Skins let you design any door you want. And with Sing Core inside, your door stays flat, strong, and light. Because of this, architects, millworks, and contractors trust our panels for projects of every size. And yes, you can choose almost any skin you want.
To get pricing, visit our Estimate Page. It is fast. And it is easy.
Why Choose Custom Door Skins?
Custom Door Skins change the way doors perform. First, the skin sets the look. Then, the Sing Core inside gives you strength. And finally, the door stays lightweight, even at huge sizes. With Sing Core, your doors resist warping, denting, and twisting better than anything else.
So, your door lasts longer. And your project stays on budget.
Get your Custom Door Quote FAST!!!
Get your custom door quote fast with our easy estimate page. First, choose your size. Then, choose your skin. After that, send your details. As a result, you get the best price for your project. So, visit our estimate page now and start your door today.
Custom Door Skin Options
Below are the most popular Custom Door Skins. Every option works with Sing Core panels. And every panel can be made in almost any size.
1. Paint Grade Door Skins
Paint Grade skins are the most affordable. They are simple. But they are strong. And they are light. Because of this, they are perfect for builders who want a clean, smooth look. You can prime and paint them in any color.
2. Wood Veneer Door Skins
Wood Veneer skins create a rich, natural look. They are ideal for staining. And they offer a high-end finish. Even better, they stay flat because Sing Core supports them from within. Choose from many veneer species.
3. Solid Wood Plank Door Skins
Solid Wood Plank skins give a warm, real-wood feel. Yet they cost far less than thick solid-wood doors. These planks create a premium appearance while staying light. And therefore, they are great for extra-wide or tall doors.
4. Metal Door Skins (Steel or Aluminum)
Metal skins make ultra-strong doors. They are available in many thicknesses. And they can meet high fire ratings. You can even design bullet-resistant doors. Because Sing Core reduces weight, these metal panels stay easy to handle.
5. Fiberglass Door Skins (FRP)
Fiberglass skins are very durable. They resist weather. They resist dents. And they work indoors or outdoors. They are also low-maintenance, which makes them ideal for high-traffic areas.
6. Ceramic Door Skins
Ceramic skins are perfect for fire-rated and high-heat doors. And, thanks to the impact-absorbing Sing Core, they resist cracking better than standard ceramic panels. These skins offer both protection and style.
Why Custom Door Skins Work So Well with Sing Core
Every Custom Door Skin performs better with the Sing Core structure. The core is light. It is strong. It is stable. And as a result, your door stays straight for decades.
If the outer skin is ever damaged, you can repair it easily. The structure supports patching without sagging or distortion.
Door thickness ranges from 3/4 inch to no maximum thickness. Door sizes range from tiny cabinet doors to doors over 16 ft tall and 24 ft wide.
Door Types We Build
We use Custom Door Skins on four main structures:
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Solid Doors
Best for doors up to 4 ft by 8 ft. Very strong. -
Barn-Style Multi-Panel Doors
Large doors joined with strips or trim. Simple and affordable. -
Oversize Paint-Grade Doors
Seamless construction using biscuit joints. Smooth. Stable. Ready for paint. -
Wood-Grain Veneer or Plank Doors
The look of fine wood. The stability of Sing Core.
How to Order Custom Door Skins
Ordering is simple. First, choose your Custom Door Skin. Then choose your size. After that, send your dimensions. And finally, get your quote.
Because custom work varies, we price every panel by size and quantity. So, for fast pricing, visit our Estimate Page now.
Ready to Design Your Door?
Sing Core makes Custom Door Skins for every project. And with our lightweight, high-precision core, your door stays strong and straight for years.
Click below to get your estimate today.
Door Overhead
Applications -> Building Components -> Doors -> Overhead Garage Doors
It’s so easy to use Sing Panels to make beautiful doors of any size. For external use, we offer marine grade plywood. If you need strength, lightweight, insulation, and true flatness, Sing has the answer!
Patented Sing Core: We put a torsion box in the SIP panel to make it better. The other names for our panels include sandwich panel, honeycomb panel and lightweight panel.
How to Buy
Sing Door Panels are easy to order. You may choose from our stock panels or order custom sized panels. Our price is based on the length, width, thickness, and quantity. Submit a Work Order by fax or email, and we will give you a quote within one business day.
Please call for distributor prices.
How to Build
Carriage Doors
Sliding Glass Doors & French Doors
Now offering panels for overhead doors. Lightweight and inexpensive, our panels work great for overhead doors.
Compared to other wood door companies our prices are less than half!
This is a Sing Overhead Garage Door Panel compared next to a typical steel overhead garage door panel. Same size and thickness but as you can see the steel panel buckles with only a few pounds put on it while the Sing Panel holds almost all of Inventor Peter Sings weight without any problem.






Door Exterior
Applications -> Building Components -> Doors -> Exterior Doors
It’s so easy to use Sing Panels to make beautiful doors of any size. All Sing Door Panels are the same price, $8 per board foot. Sing Door Panels have a ten year warranty for internal use. For external use, we offer marine grade plywood. If you need strength, lightweight, insulation, and true flatness, Sing has the answer!
Patented Sing Core: We put a torsion box in the SIP panel to make it better. The other names for our panels include sandwich panel, honeycomb panel and lightweight panel.
How to Buy
Sing Door Panels are easy to order. You may choose from our stock panels or order custom sized panels. Our price is based on the length, width, thickness, and quantity. Submit a Work Order by fax or email, and we will give you a quote within one business day.
How to Build
Sliding Glass Doors & French Doors
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Available in tough weather resistant skins like aluminum, stainless steel, fiberglass and marine grade plywood, Sing exterior doors last in even the toughest of environments.
Keep your house warm with sing doors available with an EPS or Urethane core.
EPS is our standard core that offers an R-value of 3.5 per inch of thickness and for those harsh environments the
R-value doubles using our Urethane core offering a
6.5 R-value per inch of thickness.
Sing Beauty
Wood skins that are like no other. Sing also offers and wide variety of natural wood skins to give that timeless look of beauty and precision craftsmanship.
Sing exterior door panels are built to last. Using our honeycomb technology, they hold up to the great test of time.
Based out of the Northwest and using the area as a testing ground, our doors can stand up to the harshest of elements.
- Carriage Doors
- Patented sandwich door
- 50 year guaranteed solution
- lightweight sing honeycomb insulated door panel
- Insulated Sing sandwich carriage door
- Large bi-fold sliding doors
- Insulated Sing sandwich door
- Lightweight insulated Sing honeycomb door panel
- Insulated Sing honeycomb sandwich door
- Insulated honeycomb sandwich door
Door Stile Rail
Applications -> Building Components -> Doors -> Sing Stile and Rail Doors
Sing Stile and Rail Doors
SINGCORE-The new generation of door making is an alternative to the old stile and rail door which has dominated the market for the last 100 years.
Patented Sing Core: We put a torsion box in the SIP panel to make it better. The other names for our panels include sandwich panel, honeycomb panel and lightweight panel.
The new technology developed and patented by inventor Peter Sing makes doors stronger ,more lightweight, saves more energy and is more dimensional stable than any stile and rail door. Best of all it is more affordable due to the reduction in labor used to produce Sing Panels and that savings is passed down to you and your customers.
The new Sing torsion box door frame is labor saving, earth friendly, the best of all it makes for a long lasting door.
Our Sing Stile and Rail Doors fill a need in the sliding glass door niche because our cores are not only lighter than standard solid wood, fiberglass and composite door cores but our cores are stronger providing a longer lasting door core with a structural guarantee.
- Add molding to create stile and rail door appearance
- True Raised Panel Doors
How to Install the Glass
SINGCORE sliding glass doors can do anything a traditional stile and rail door can and more.
How to build.

On the left are patented Sing honeycomb stile and rail. On the right is veneer (walnut) ready for gluing onto the patented Sing honeycomb stile and rail.

Apply glue to our patented Sing honeycomb stile and rail.


Press veneer to patented Sing honeycomb stile and rail. Most honeycomb panels cannot handle the high pressure and temperatures of the hot press, Sing honeycomb can.

Stile and Rail after the veneer has been pressed on.

See how straight the patented Sing honeycomb stile and rail are, yet they are still incredibly strong and lightweight.

Drill holes to accept dowels.

Doweled and glued.


Router out the end if hardware is to be installed

Stained and ready for glass and installation.
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Gallery | Technical Info | FAQ | Order Form | Standard Pricing

Door Interior
Applications -> Building Components -> Doors -> Door Links -> Interior Doors
Interior Door Panels
It’s so easy to use Sing Panels to make beautiful doors of any size. All Sing Door Panels are the same price, $8 per board foot. Sing Door Panels have a ten year warranty for internal use. For external use, we offer marine grade plywood. If you need strength, lightweight, insulation, and true flatness, Sing has the answer!
Patented Sing Core: We put a torsion box in the SIP panel to make it better. The other names for our panels include sandwich panel, honeycomb panel and lightweight panel.
How to Buy
Sing Door Panels are easy to order. You may choose from our stock panels or order custom sized panels. Our price is based on the length, width, thickness, and quantity. Submit a Work Order by fax or email, and we will give you a quote within one business day.
How to Build
Sliding Glass Doors & French Doors
We offer many different styles of door blanks, when you receive your blank, it is ready for the final millwork touches. Perfect for the DIY projects and our panels are lightweight and easy to attach trim and hardware to give your home the final touch. Available in any size and thickness for your project.



- On Site
- non warping strong honeycomb sandwich
- sing honeycomb lightweight glass sandwich
- sing honeycomb lightweight non warp
- high strength honeycomb wood entry honeycomb
- Insulated Sing sandwich door
- Patented Sing honeycomb sandwich door
- lightweight non warping contemporary honeycomb
Door Sliding Glass
Applications -> Building Components -> Doors -> Door Sliding Glass
Sliding Patio Doors & French Doors, Glass with Wood Frame
SINGCORE-The new generation of sliding door making is an alternative to the old stile and rail door which has dominated the market for the last 100 years.
Patented Sing Core: We put a torsion box in the SIP panel to make it better. The other names for our panels include sandwich panel, honeycomb panel and lightweight panel.
The new technology developed and patented by inventor Peter Sing makes doors stronger, more lightweight, saves more energy and is more dimensional stable than any stile and rail door. Best of all it is more affordable due to the reduction in labor used to produce Sing Doors and that savings is passed down to you and your customers.
The entire glass cutout of the door is cut out of our solid Sing panel to create a seamless torsion box frame to replace the conventional stile and rail door, which is typically held together by dowels.
The new Sing torsion box door frame is labor saving, earth friendly, the best of all it makes for a long lasting sliding door lock.
Our door cores fill a need in the sliding glass door niche because our cores are not only lighter than standard solid wood, fiberglass and composite door cores but our cores are stronger providing a longer lasting door core with a structural guarantee of 10 years which is about 9 years longer than the standard guarantee out there.
Glass options include frosted glass or tempered glass for glass replacement.
It’s so easy to use Sing Panels to make beautiful doors of any size. Sing Door Panels have a ten year warranty for interior use. For external use, we offer marine grade plywood. If you need strength, lightweight, insulation, and true flatness, Sing has the answer!
How to Buy
Sing Door Panels are easy to order. You may choose from our stock panels or order custom sized panels. Our price is based on the length, width, thickness, and quantity. Submit a Work Order by fax or email, and we will give you a quote within two business days.
Sing Door Products
Carriage Doors
Get custom doors without the custom pricing!
Sing Honeycomb Panels are available at a fraction of the price of conventional sliding door panels, and require half the work. Sing Door Panels are insulated, lightweight, strong and more dimensionally stable than solid wood panels!
Choose Sing for all your Door Panels! When using Sing Panels, you design your own door by adding the trim, paint, and hardware. Sing Door Panels are great for millwork shops and door builders. Special pricing is available to distributors and retailers.
The typical 1.5″ solid wood edging is adaquate for door hinges but add solid wood blocking to your door core for added hardware or door knob needs.
Order the typical flat panel door or add trim to the panel to achieve the raised panel look.
Skin Options
To see typical skin options click here.
How to Order
Stock Doors Available:
Sing Door Panels (4’ x 8’ or smaller) just fill out the order form.
Order Custom Sizes:
To order custom doors sizes, submit an order form. We’ll respond with a quote within two business days.
How to Install the Glass
SINGCORE sliding glass doors can do anything a traditional stile and rail door can and more. Making window glass replacement easy and convenient.
Gallery | Technical Info | FAQ | Order Form | Standard Pricing

Door Sliding
Applications -> Building Components -> Doors -> Door Links -> Sliding Pocket Doors
Sliding and Pocket Doors
Products > Door > Sliding Door
Sliding/Pocket Doors
It’s so easy to use Sing Panels to make beautiful sliding doors of any size. Sing Door Panels have a ten year warranty for internal use. For external use, we offer marine grade plywood. If you need strength, lightweight, insulation, and true flatness, Sing has the answer!
Patented Sing Core: We put a torsion box in the SIP panel to make it better. The other names for our panels include sandwich panel, honeycomb panel and lightweight panel. See our new C Series line of Affordable Barn Door and Sliding Closet Doors.
How to Buy
Sing Core door panels are easy to order. You may choose from our stock panels or order custom-sized panels. Our price is based on the length, width, thickness, and quantity. Submit a Work Order by fax or email, and we will give you a quote within one business day.
Custom doors without the custom pricing!
Sing Core door panels are available at a fraction of the price of conventional sliding door/pocket door panels. Sing Door Panels are insulated, lightweight, stronger and more dimensionally stable than solid wood panels – at less than half the price!
When using Sing Panels, you design your own door by adding the trim, paint, and hardware. Sing Core door panels are great for millwork shops and door manufacturers. Exclusive pricing is available to distributors and retailers.
Door Assembly Instructions:
You can combine these to make almost any size door you desire. Once your door panels have arrived, place them in the room where they will be installed and do the following:
1. Arrange your door panels on a level plane so that they can be joined precisely.
2. Join the panels in the horizontal position and applying glue in the grooved “biscuit” pocket.
3. Insert biscuit joint into one side of panel, apply glue to groove in second panel that will be attached to the first panel
4. Slide panel so that the other half of the biscuit is inserted into the biscuit groove and apply adequate pressure to the glued area. (We recommend formaldehyde-free, urethane glue)
5. Once all of the panels have been assembled together and the glue has completely dried, your Sing Core door is ready to install.
Check out the tutorial videos at the bottom of this page. Contact us if you have further questions/concerns on how to install our Sing Core door panels.
Order Custom Sizes:
To order custom door sizes, please submit a work order form. We’ll respond to you with a quote within two business days.
Installing a Sliding Factory Door

Step 1: Install the sliding door track.

Step 2: Prepare door for hardware installation.

Step 3: Install hardware and hang the door to make sure of fit and function.

Step 4: Finish and paint the doors.

Step 5: Admire your newly install Sing Sandwich Panel Sliding Doors.
Gallery | Technical Info | FAQ | Order Form | Standard Pricing
Case Studies
Title: Steam Room Door
Client: Pizza Company
Product: Sing Panels
Challenge:The client needed doors that resist moisture and close securely. He also needed the doors to withstand frequent use at a business.
Sing Solution:Sing Core doors are flat and straight enough to keep humidity from leaving the steam room. Water resistant coating was applied to protect the door, preventing it from warping and rotting.
Customer Quote:
“We had purchased two of your panels to use as sliding doors for one of our steam rooms. To date they are working great.” Kenny B.
Title: Children’s Room
Client: Tremain Construction
Location: Washington State
Product: Sing Panels
Challenge: The family needed a large divider for their living room. It needed to be lightweight so that the kids could open and close it easily.
Sing Solution:Sing Core panels are light enough for a small child to move and easy to assemble. The family finished the doors with chalkboard paint to make it kid-friendly.
Customer Quote:
“As you can see, the photo below was taken right after install and finishing completed, still construction stuff in the area. The other picture is after the owners moved in and their kids started using the door, which is covered with blackboard paint; it becomes a moving mural in the space.” -P
- aluminum sing honeycomb lightweight non warping sliding door
- sing honeycomb lightweight aluminum sandwich
- glass sing honeycomb non warping sliding door
- honeycomb lightweight sandwich honeycomb door
- true flat sing honeycomb lightweight
- Sliding Barn Door Room Separation
- Bay of Large Storage Cabinets
- Contemporary sing honeycomb sandwich lightweight wood
- Sing honeycomb lightweight sandwich wood
- patented Sing honeycomb sandwich closet door
- Oversize Pocket Doors
- non warping strong honeycomb sandwich
- sing honeycomb lightweight glass sandwich
- oversize lightweight high strength honeycomb door
- large oversize lightweight high strength sing sandwich door
- lightweight high strength large honeycomb door
Tiny Index

Products > Tiny House
Tiny House Panels
Photo Gallery & See our Folding Modular House Competition
Getting Started
Stronger than Steel, Lighter than Wood
The easiest method to build an insulated small house is by using patented Sing honeycomb panels!
Earth friendly living is the spirit of Tiny House dwelling. What better way to build Tiny Houses than with Sing Honeycomb Panels?
Sing Tiny House Sandwich Core Panels are great for wood sheds, living spaces, living off code, guest houses, ticket booths, pump houses, studios, disaster relief structures, utility sheds, playhouses, espresso stands and any other small building needs. They travel safely, construct quickly, and look beautiful.
Green
- Recycled foam core
- Renewable veneer
- Formaldehyde free glue
- Minimal carbon footprint
- Insulation saves energy
- Manufactured efficiently with minimal emissions
All in One
Our prefabricated panels and logs include insulation, framing and interior and exterior siding. Our thin sandwich panel walls give you more space inside your home. We replace the need for sheet rock, which weighs a ton. Sing helps you build your house simply and quickly, so you can start living.
- Insulation
- Siding
- 2” thick panels
Simple and Quick
Sing Logs and Sandwich Panels are user friendly. They weigh less than a third as much as an equivalent slab of sheet rock, so you can easily and safely construction your home.
- Fewer materials
- Fewer steps
- Lightweight
Strong and Stable
Sing Tiny Houses are structurally superior to traditional 2” x 6” framed structures because the glue we use for the sandwich panels covers the entire surface area and creates a stronger bond than nails ever could. This will save thousands of nails and over time will ensure the structural integrity of your Tiny House. Sing Honeycomb Panels have precision to within .007 of an inch. This means your Tiny House will be structurally sound and perfectly smooth. After years of expansion and contraction, nails settle, cracking your timber. The structural glue used with Sing Panels will not settle and cause warping over years. Help us to preserve the environment by using high quality, long lasting Sing Panels.
- Compression strength up to 660psi
- Resists dents and dings
- Rigid and straight
Beauty
Sing Square Log Homes makes large sandwich panels (4’x8′ and 4’x10′), so your house will have fewer seams. The core is covered by any of a wide variety of skins from natural wood to metal, customized to suit your display style. From rustic to modern, Sing panels are made for your Tiny House!
We offer many skin choices*:
- Aluminum
- Marine Grade Plywood
- Plywood
- Douglas Fir
- Birch/Luan
- Cedar
*Specialty orders are available at a cost.
- Mobile Storage Units

| Technical InfoFAQTestimonialsPrice & Order |
Testimonial
“Learning about Sing Panels completely changed the way I look at building.”
— Celina Dill, Tiny House Blogger
See pictures at her blog and in our gallery.
| Yes, Sing Core does make the best reinforced structural insulated panels (RSIP) for use in Tiny House applications as walls, floors, ceilings and roofs. We have a huge desire to support the tiny house industry but be aware that we only offer Sing Panels for tiny house construction to professional distribution channels. Since we offer no support for our products (besides what is readily available via our web site). Our operation is not setup to sell our products to people in need of retail customer service. We suggest that you seek answers to any questions about how to use Sing panels by consulting with your engineer, architect, builder or contractor.
Note: We do occasionally offer products direct to the do it yourselfer, like Tiny House panel Kits or Tiny House Surplus Panels. Though we may provide you with the materials, we offer no how-to support to the DIY enthusiast except that which is available via our Tiny House FAQ (frequently asked questions) and other online resources. |





































































































































