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See: AWI Millworks

C T Finishing, Inc. Pomona, CA (909) 629 7402
Crestmark Architectural Millworks Arcata, CA (707) 822-4034
Mission Bell Architectural Millwork Morgan Hill, CA (408) 778-2036
A. Secondino & Son, Inc. Branford, CT (941) 639 7188
Amerifix West Haven, CT (203) 931 7290
Adams Group North Port, FL (203) 481 3496
Akira Wood, Inc. Gainesville, FL (352) 375 0691
Andy’s Cabinets and Millwork Inc. Tallahassee, FL (850) 562 3536
Blumer & Stanton, Inc. West Palm Beach, FL (561) 585 2525
Bruce Matson Company, Inc. Honolulu, HI (808) 380 9414
Advanced Woodworking Industries (AWI) Hayden, ID (208) 772 2377
Anderson Cabinet & Millwork Rigby, ID (208) 538 7415
Ameriscan Designs, Inc. Chicago, IL (773) 542-1291
Benchmark Cabinets & Millwork, Inc. Peoria, IL (309) 697 5855
Bernhard Woodwork, Ltd. Northbrook, IL (847) 291 1040
ONSITE Woodwork Loves park, IL (815) 633-6400
Advanced Cabinet Systems Marion, IN (765) 677 8000
Antreasian Design, Inc. Indianapolis, IN (317) 546 3234
A.F. Johnson Millwork Company West Des Moines, IA (515) 277 7222
Allen Millwork Company Wichita, KS (316) 943 5151
America’s Finest Woodworking Team Inc Lexington, KY (859) 254 8999
C & C Millworks, Inc. Baton Rouge, LA (225) 273 1258
Woodward Millwork Group Goodbee, LA (985) 871-7723
Duratherm Corporation Vassalboro, ME (207) 872-5558
Baker & Kerr, Inc. Upper Marlboro, MD (301) 390-1090
Sterling Architectural Millwork Springfield, MA (413) 732 2131
South Shore Millwork, Inc. Norton, MA (774) 225-6300
Woodmeister Master Builders Holden, MA (774) 345-1000
Advantage Millwork Wyoming, MI (616) 248 7908
Allen Bradley Interiors Inc. Rhodes, MI (989) 689 4133
BJC Services Inc Chesterfield, MI (586) 783 4559
Burke Architectural Millwork Livonia, MI (734) 744 9492
Aaron Carlson Corporation Minneapolis, MN (612) 789-8885
A to Z Laminating Specialists Inc Wentzville, MO (636) 332 9961
New Mexico
Antix, Inc. Las Cruces, NM (575) 526 2398
New Jersey
B & M Custom Cabinetry Blackwood, NJ (856) 227 9248
New York
Bauerschmidt & Sons, Inc. Jamaica, NY (718) 528 3500
Beaver Creek Industries, Inc. Canaseraga, NY (607) 545 6382
Deerfield Millwork Water Mill, NY (631) 726-9663
Jim Illingworth Millwork Adams, NY (315) 232-3433
Reilly Windows & Doors Calverton, NY (631) 208-0710
North Carolina
Carolina Top Shelf Charlotte, NC (704) 376-5844
Caseworx Hudson, NC (828) 212 0000
Amtekco Industries, Inc. Columbus, OH (614) 228 6590
Advance Cabinet Designs, Inc. Eugene, OR (541) 465 3394
McFarland Door & Millwork Lakeview, OR (541) 947-5136
Allegheny Millwork & Lumber Pittsburgh, PA (401) 721-5500
Beam’s Custom Woodworking Inc. Morgantown, PA (610) 286-9040
Bristol Millwork Inc. Philadelphia, PA (215) 533-1921
Rhode Island
All State Fabricators Cranston, RI (401) 785 3900
Artisan Millwork Pawtucket, RI (412) 431-4224
ANA Woodworks, LLC Chattanooga, TN (423) 867 3171
21st Century Manufacturing Houston, TX (832) 593 0123
3V Company Houston, TX (281) 717 1200
Abilene Millwork Abilene, TX (325) 677 8856
Acacia Originals Porter, TX (832) 256-9631
AEP Millwork Arlington, TX (817) 522-4542
Bespoke Millwork Houston, TX (281) 598 4880
Brochsteins Houston, TX (713) 666 2881
HEWN – Joinery + Mastercraft + Fabrication Austin, TX (512) 386 6404
Maverick Door and Millwork, Inc. Schertz, TX (210) 659-5553
Robert Shaw Manufacturing Fort Worth, TX (817) 927-2557
Boswell Wasatch Mill Springville, UT (801) 489 7527
Annandale Millwork and Allied Systems Winchester, VA (540) 665 9600
AAA Cabinets & Millwork Inc. Airway Heights, WA (509) 484 7152
Interior Environments Seattle, WA (206) 432-8800
O.B. Williams Company Seattle, WA (206)623.2494
West Virginia
Allegheny Restoration & Builders Inc. Morgantown, WV (304) 381-4820
Eggers Industries Two Rivers, WI (920) 793 1351
Kolbe and Kolbe Milllwork Co., Inc. Wausau, WI (715) 842-5666


Harvest Creek Millwork London, ON (519) 680-7482
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Looking for a millwork to finish your SingCore project?
Find an AWI Millwork Near You

patented Sing sliding non warp large doorOur primary affiliation is with the millworks that are highly skilled and qualified to deliver an end product which exemplifies the highest and best use of our patented SingCore building materials. In fact, when we receive inquiries about our products, our first question is, “Who is your millwork company?” If they do not have one they are working with, we suggest they get one and have them contact us directly.

SingCore is an extraordinary building material that left to itself is not much more glamorous than any other engineered plywood, even though nothing can compare to SingCore’s unparalleled light weight and strength. Yet, in the hands of a skilled millwork, their specialized craftsmanship is what makes Eco-friendly SingCore shine with the beauty and elegance SingCore products are known for.

Millworks face many challenges when bringing the architect’s vision to life. In some cases, the limitation of available building material can render a potential job impractical or even impossible.

Click Here to Get an Estimate


Large non warp exterior sliding doors guaranteed for 50 years lightweight high strengthFor instance, a particular project might include a large wooden door. If the large wood door is an exterior door over seven feet tall or over four feet wide (as is the case for most modern pivot entry doors) millworks and custom door manufacturers will simply pass on the large door portion of the job, forfeit the entire job altogether based on the oversized exterior door, or if they do take the job may agree to build the large door according to the architectural specifications but will not offer a warranty on the performance of the big door.

Large exterior doors, especially large wood doors, are a problem because millworks and door manufacturers know the doors will fail due to warping. It’s nothing personal; it’s just the nature of the beast being the wood grain itself which tends to move according to changes in temperature, moisture or other environmental conditions.


Building warp-free wood doors of any size with SingCorePatented SingCore when engineered by the warp-free team can prevent any large door from failing over time. Millworks are confident they can provide a solution for any project including large doors of any size if they have SingCore inside, guaranteed.

Clients may ask for a warranty on the large doors (that without SingCore inside could not be warranted) and the millwork can now offer the professional SingCore guarantee – in writing – that the doors with professional SingCore inside are guaranteed not to warp, bend, twist or otherwise fail for 50 years.

Working with SingCore


Easy to CNC router

Millworks use either open edge or closed edge Sing Panel, whichever works best for the project at hand, as well as many options for skin types, solid blocking, custom lite cut outs, solid and exterior edging options.

SingCore is easy to machine and work with using traditional woodworking tools, CNC and edge –banding machinery and equipment.

Used as substrate material, SingCore can be delivered to the millwork ready for cold press or hot press lamination. Alternatively, millworks may desire exterior surfaces to be applied in our factory, which makes their job easier.

Standard door width door blanks with SingCore inside for added strength and lightweightSingCore Durability

Products made of Sing panels are easy to repair damage to its original condition simply and easily by cutting a hole (you can even use a chain saw without compromising the structure due to its unique Sing Core torsion box/foam and stress skin composition). Any repairs will have the strength, integrity and durability of the original structure.

Professional Sing Panel Product

All Professional Sing products are guaranteed warp-free and structure guaranteed for 50 years. We can accommodate your specifications, just let us know your required tolerances for flatness, and Sing Core can provide the solution guaranteeing your customer’s satisfaction and your peace of mind.

SingCore Expertise

DSC_0721We specialize in providing solutions for high-end applications and millworks, based on the requirements of our customers, meeting or exceeding their expectations and those of their clients by using the right materials and years of warp-free solution experience. Add to that, our commitment to you, to do everything in our power to support you in your efforts to remain competitive and win the bid.

If you are a millwork operation serving high-end clients, our 50 year guarantee for Sing products build both you and your customers’ high levels of confidence.

Services for Millworks

1. Oversize

stacks of lightweight high strength trade show display panels ready to shipSingCore excels at creating warp-free oversize doors blanks or substrates in almost any exterior surface material; most popular is wood and/or aluminum up to 50 feet long in almost any thickness.

2. Production Work

We can custom manufacture to your specifications large quantities of door planks or panels in odd sizes for millworks used for doors, tabletops, room dividers, temporary walls, cabinetry, countertops, etc…

3. Custom Accommodations

We can provide the customizations that you desire, like lock blocks, solid wood implants, anchor points for fastening, custom lite cut outs, a full range of skin and edging options.

Sing Core Team Guarantees:

1. On-Time Delivery
New technology enables higher production at lower costs, perfect for large quantity orders in least amount of time and shipping is much quicker and easier than other methods.
2. On Budget
Our simple pricing method makes it easy to track your bottom-line, plus our commitment to help you, “Win the Bid,” for large quantity orders and lower cost of shipping due to being so lightweight.
3. Highest Quality
We only build the best door for the best clients in the world. High-end clients rely on us because we deliver only the best. Rest assured, your clients will be getting only the best doors backed by our 50 year guarantee.

How is it possible?

High Technology
Best Price
Best Doors
Increased Capacity
SingCore uses the latest and most sophisticated, yet Eco-friendly technology to build the best doors in the world. Our specialty is the most challenging oversized doors for the most high-end clients in the world, with pride. SingCore door with our modern facility and new door building technology is 5 times more efficient than conventional door manufacturing. Fill out the simple price quote then you will see how together we can win the bid. SingCore doors are the only doors among the door industry that can be guaranteed warp-free for 50 years, lightweight, stronger than steel pound for pound, insulated, sound deadening, Eco-friendly, long-lasting and resistant to rot over time. Thanks to SingCore, you can bid on jobs that may have been considered previously to be too large for you. No reason to be intimidated by door jobs of more than 50 doors, as we can easily make 300-door-blanks-a-day for you.

See: Door Specifications

Example Sing Solution

One of our most prestigious clients in the Mid-West needed 700 specific door blanks to fulfill an order. Rather than dedicate their resources to this order, they reached out to SingCore. We made the door blanks in three days, so the client was able to go on about their business as usual without having to bear the cost of adding staff, equipment and re-tooling.


Fast turnaround time – It took less than 3 days for SingCore to complete the order

High quality – Each door was manufactured with patented SignCore technology in Washington state, ensuring the end user guaranteed strongest true flat and lightweight doors. Note that the light weight of these doors saved more than half on shipping costs.

Easy to fabricate – Due to the patented SingCore process and our factory’s design and dedication to high quantity production, we are able to make more Eco-friendly doors in less time at less cost.

“…we were unable to compete for large quantity orders.”

true-flat-doors-in-quantity-fast-delivery-coast-to-coast-compareMany of our partners report, “Before teaming up with SingCore, we were unable to compete for large quantity orders,” admitting that they simply stopped bidding on large quantity jobs (anything over 50 doors), because they knew they were no match for the major players; until SingCore.

SingCore routinely provides 200-to-300 doors blanks a day to distinguished door manufacturers, enabling them to compete even against companies that provide cheap import doors. With the majority of the work done in advance (Sing door blanks are easy to work with to build all types of sing doors) you can concentrate on finishing, adding hardware, delivering and installing the doors, knowing that they are receiving a superior product that guarantees satisfaction and longevity.

Sing Core Wood-based Foam Aluminum Balsawood Nomex Plastic Cardboard
Insulation x x x x x
Sound Deadening x x x x x
Lightweight x x
Strength x x x
Solid x x x x
Eco-friendly x x x x
Renewable x x x x
Oversize x x x x x x
Dimensionally Stable
Affordable x x x x x
Waterproof Upgrade? x x
Fire Retardant Upgrade? x
Bullet-proof Upgrade x x x x x
Thickness Available x x x x x x
Skin Options x x x x x x
Easy to Machine x x x x x x
Fast Turnaround x x x x x x

Building Components



More Applications


Best Sellers


Important News


Meet some of our Mill works

Client List

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Solid Wood Stave Door Blanks

Applications -> Building Components -> Doors -> Solid Wood Blank Doors
solid wood stave sliding door wood planks composite honeycomb panels

Click on picture to see our wood skin gallery!

Our panels make doors!

Patented Sing Core solid wood stave door blanks feature the newest technology in the door industry for composite doors yielding the only eco-friendly, lightweight, fully insulated, high-strength doors with wood blanks of any size (up to 40 ft.) that can be guaranteed true flat and to stay flat for 50 years.

Large door versus regular-size door challenge (i.e., over 4 feet wide and over 8 feet in length):

Large doors are heavy, dimensionally unstable, require more strength due to the heavy weight, and are a challenge to manufacture, ship and install.  High-end jobs require precision and true flatness to please the customer.  A homeowner’s architect, general contractor and mill worker must solve the problem of warping doors.  The solution to the challenge is to use patented professional true flat Sing panels to make your doors.

Sing Core wood stave door planks are the only solid wood doors that will not warp, bend, twist or cup following installation.  This means no more continuous service calls for maintenance of big doors that cannot possibly stay straight due to the limitations of solid wood – or any other door core – that is subject to failure.  Sing panels have a patented honeycomb/torsion box interior which gives lightweight yet unsurpassed strength (pound-per-pound stronger than steel) and stability to any door, and allows Sing Core to provide a 50-year guarantee

Interior Doors:

Sing panels make amazing designer doors in any style.  With Sing panels, fragile doors such as French doors are made lightweight yet strong, not warping or breaking hinges, which will last for many decades.

Exterior Doors:

Sing panels make sturdy exterior doors in any style.  With Sing panels, exterior doors are lightweight and strong, even when oversized.  Our professional doors are guaranteed to stay true flat and not warp or twist for 50 years

When is a door not a door? When it fails to function as a door.

The problem is that all door core materials are either not high precision, too heavy or will move when exposed to moisture, humidity or change in temperature resulting in door failure.

Heavy solid metal or steel will not warp, bend or twist, but is not high precision due to welding (sing core tolerance is + or –  .006 inch!) and is often impractical due to the overweight issues causing excess strain on both the hardware and structure, causing continued maintenance issues.  The solution is our patented lightweight yet strong Sing core technology.

Finishing a door blank:

There are two types of finish for door blanks:  paint grade and wood grain.  Paint grade includes such finishes as metal, Masonite, marine plywood, etc.  Wood grain finish includes such finish as solid wood stave and thin veneer.

Why Use Solid Wood Instead of Veneer?

solid wood composite door planks any size thickness true flatNever settle for substandard veneer doors again. Door engineers prefer to use inexpensive veneer as opposed to real solid wood facings because veneer is thought to be less likely to warp, bend or twist.  But thanks to the super-strength of patented Sing Core technology, you can use solid wood stave and wood blanks with confidence knowing that your door can be guaranteed true flat and will stay flat.

How can a solid wood-faced door stay true flat? As every woodworker knows, when using a solid wood surface, the grain will move according to moisture or temperature change causing the door to fail. When using our patented Sing Core as a substrate you can safely use solid wood because the solid torsion box/honeycomb patented material is continually keeping the wood grain straight and true.  Whereas wood stave has more wood fiber giving it more of a chance to warp than thin veneer due to the unbalance of the both side of the door moisture contents, patented Sing technology solves this problem by combining stiffing skin on both side of our patented Sing core.  This Sing panel technology eliminates the troublesome movement of the door blank — warping is no longer a concern when wood stave is combined with patented Sing core.

In addition, solid wood is easy to work with, install (no need to hot press), repair and remodel.  That’s why professionals trust Sing Core’s years of expertise in helping to design the only wood stave doors (that look just like solid wood doors) that can stay straight and true for many decades while respectfully honoring the beauty and elegance of solid wood, which far outlasts easily-damaged veneers, yet can be sanded and repaired if necessary.

Celebrate your real wood!

solid wood stave door planks lightweight honeycomb guaranteed 50 yearsOur Eco-friendly lightweight, high strength alternative is the best   solution for combating the issues associated with weight and size,   especially large doors.  Only our patented Sing torsion box/foam   composite core combined with our years of experience provides   guaranteed solutions for oversize doors.

That’s why this technology is found everywhere, from beneath the sea   (US Navy) to outer space (NASA) and everywhere in-between.

Sing panels may be finished in almost any wood species, like   mahogany, redwood, teak wood, cherry wood, walnut wood, cedar   wood, Ipe wood, sapele wood, poplar wood, ebony wood, ash wood,   oak or any other hardwood or exotic wood types available.

This same wood blank composite technology is also a common solution for high-end projects like engineered hardwood flooring, shiplap, wood furniture, wood shelves, decking, shed doors or any other application demanding high precision and exemplary performance over time.

How is wood stave/veneer added to Sing panels?

Wood stave is added directly to the metal or wood skin our patented Sing cores.  Wood veneer is added to an 1/8-inch mdf attached to the metal skin.  Call us for a free consultation on the best option for your project.

How to BuyMetal Composite Sing Core panels are true straight, light and strong.

To order Sing Large Door panels see our pricing page  and submit an order form either by email,, or print and fax it to: 360.495.4585. We’ll provide a quote within one business day. If you have questions, please contact us.

Easy Ordering

All we need to know is the length, width, thickness and what you desire on the exterior, and your custom specialty panels are made to order. Getting a quote for your specialty product, is easy, thanks to our simple online order system.

Bulk Discounts

If you’re looking for a bargain price, remember, the more you order, the less expensive your total order will be per piece. Quantity and wholesale inquiries are encouraged. Feel free to contact us for more information. Click here for Closeout specials.

Fast turnaround: In you’re in a rush, only Sing Core can be custom made within 24 hours and is proudly manufactured for you in the USA.

Fast delivery: Any thickness and almost any length, less than 5 ft wide, can be made with in 48 hours if it is rush order.

SINGCORE Large Doors 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. If you have a tight budget, give us a call, we might have an alternative solution tailored to your needs.

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Sing Core Metal-Skinned Panels

lightweight panel honeycomb high strength sing aluminum

Click on picture to see our aluminum page.

Click on picture to see our cold-rolled steel page.

Click here to see our galvanized steel page.

Click on picture to see our galvanized steel page.

Click here to see our stainless steel page.

Click on picture to see our stainless steel page.

Our patented Sing Core honeycomb/torsion box panels can be covered in a metal skin of either aluminum , cold-rolled steel, galvanized steel, stainless steel, etc., depending on the desired effect and/or use.  (See applications.)  When covered in metal skin, our lightweight 2 x 2 inch grid panels include the following features to order:1)          Inch per inch stronger than steel (tested at 660 PSI);2)          True flat to 1/16” per 8’ (for 50 years with our professional guarantee);3)          Lightweight;

4)          Flutter/rattle resistant;

5)          Rust resistant:

6)          Non-combustible;

7)          Highly resistance to moisture corrosion/waterproof/water resistant/storm proof;

8)          Resistant to fungi;

9)          Available in a variety of finishes, thicknesses and densities with numerous panel edge options;

10)        Sound deadening;

11)        Insulated from R3 to R6.6;

12)        Standard panels come embedded with solid wood edges for easy assembly;

13)        Available in almost unlimited custom shapes and designs; and

14)        Many more custom features.

In addition, our Sing panel cores are made with our patented, formaldehyde-free, non-toxic eco-friendly glue and recycled foam.  Overall, metal Sing panels are the superior choice for strong yet lightweight building materials and are proudly made in the USA.

For projects requiring long panels, Sing Core’s special invisible seam technology creates extremely long/tall panels with unsurpassed strength and rigidity that still remains true flat up to 50 feet. Thus, metal-skinned Sing Core panels exceed AWI standards.  Our large Sing panels stay dimensionally stable regardless of temperature and moisture changes.

For projects requiring special features, our metal Sing panels can be specially upgraded. For example, Sing core panels can be made fire retardant, bullet-proof, radiation-proof, etc, according to need.  Sing panels can also be manufactured up to 6 inches in standard thickness (custom thickness available).

Metal-skinned Sing panels can be used to make projects ranging from kitchen tables to walls to doors to metal roofing to metal floors to truck panels to electrical towers to outdoor benches to magnetic panels to modern art.  The possibilities are virtually unlimited!

Rush jobs can be custom made within 24 hours with material availability and delivered within 48 hours if less than 5 feet wide.

To determine pricing and to order see our pricing page.

Compare the available gauge:

(click to enlarge)

Metal guage weight table
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With Our Free Consultation, Professional True Flat Doors are Guaranteed Not to Warp for 50 Years!


True Flat ChallengeSing-panels-lightweight-high-strength-honeycomb-core

We do not sell finished doors, but provide door planks to door industries and mill workers with patented Sing Core panels to build the most true flat, insulated professional doors in the world guaranteed.

Warping is a challenge for high-end door makers.  However, professional Sing Doors are highly insulated doors that will NOT warp, bend or twist. 

Professional Sing Doors made of patented Sing Core materials and special skin are the only Eco-friendly, lightweight, high-strength, insulated doors that are true flat and will stay true flat for 50 years guaranteed (with our free consultation and an additional cost) regardless of application or size.  Professional Sing doors will remain true flat even if they are garage doorspanel doorssliding doors, carriage doors, or oversized large doors!

True Flat Guarantee premium certified true flatProfessionalSing furniture, such as conference tables, will also remain true flat.  Our guarantee means you do not have to be afraid of warping, bending, twisting or expensive maintenance.

The secret is our patented Sing Panels combined with appropriate skin (even wood), length, thickness and knowledge of years of experience in handling thousands of over-sized, challenging doors (for example see our Warehouse door).  See our coast-to-coast clients list. 

Patented Sing Core panels are about 15% the weight of particleboard, pound per pound stronger than steel and cost less, but more dimensionally stable than any wood core, a great advantage in your factor-in shipping costs.

 This technology has endless applications.  Click here to see how:  Door News Archive

Only certified-professional (with free consultation) true flat Sing Doors qualify for our 50-year guarantee.  For other true flat doors, we may be able to make them more flat than the industry standard by adding more thickness and strong skin with a proper Sing core in order to build a true straight but less costly door plank. 

Sing Panels are changing the way doors are made.  Any type, style or appearance of any door with any shape, size or number of window-light openings, CNC cut-outs to offset the high labor cost of traditional style and rail doors.  One more reason that Sing doors are making record sales.

You can Google search our lightweight, high strength, true flat door to see our expertise:  Google Images

New and Improved Large Sing Doors

Our most recent developments include our highest performance large door solutions yet. Take for instance our most precision lightest weight and highest strength large wood pivot door that is not only true flat but guaranteed to stay flat without warping, bending or twisting for 50 years!

12 ft x 10 ft wood pivot door lightweight high strength non warping 50 year guarantee

This large wood pivot door is 10 ft. x 12 ft. and perfectly flat. Now, wood is normally a problem for any door, especially a large door, but used in conjunction with Sing Core door technology, we have taken large pivot door technology to a whole new level.