A bendable substrate with a hardboard face that can be formed first and laminated last.

Flexboard is a bendable product designed for use in all types of radius projects. It consists of a core of kerfed particleboard with an .080" thick hardboard face. Flexboard will produce a 10-inch radius that allows for quick and easily fabrication without the need for sanding, patching or multiple layers and requires no special installation methods. It helps reduce labor cost, provides a uniform surface with many face options and improves quality.

Flexboard is a superior alternative to bending plywood for radius fabrication. It is calibrated for uniform thickness throughout the manufacturing process. Consistent thickness helps achieve excellent quality results without the need for putty, bondo and sanding that increases labor requirements usually needed when using bending plywood. Flexboard's seaming abilities allow for easy splicing in both the vertical and horizontal direction. Its substrate allows for repeatable symmetrical bending.

Flexboard is an eco friendly product with a NAF face material and a particleboard core material made from 100% recovered and recycled fiber content. Flexboard can help qualify for LEED credits MR 4.1 and MR 4.2. It is also available in a FSC version that can provide credit on MR 7. Flexboard is optionally available in a No Added Formaldehyde version called FlexGreen (see additional information under that product).

Photo Courtesy of: Ultrawood

Flexboard is a great product for architectural panels. Its stable hardboard face allows the flat attachment of face veneer materials, by use of hot or cold press application. Either single-ply or paper-backed veneer faces can be laminated using normal pressure, heat and time settings to the Flexboard. It can then be machined, sanded and then bent into the desired shape. It can be held in shape by gluing to a ribbed frame or applying a back to lock into shape.

Flexboard's hardboard surface is ideal for conventional fabrication and then applying veneer, HPL, metal and other similar materials. When laminating after fabrication, the use of contact adhesive with normal pressure is adequate. Firm hand pressure or moderate pressure with a J-roller works well. It is also very suitable for painting or application of graphic materials. When using a PVA glue, make sure the glue is transferred to both materials and that adequate uniform pressure can be applied for the required amount of time.

Flexboard is available in nominal 4' X 8', 8' X 4', 4' x 10', 10' x 4', 4' x 12' and 12' x 4' panel sizes with a particleboard core and an .080" thick hardboard face. Additional core materials are available based on sizes and availability.


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“Prior to using pre-kerfed substrates provided by Interior Products Inc., we painstakingly saw-kerfed plywood panels manually for use in radius millwork applications. Interior Products flexible substrates have cut our skilled labor costs dramatically. The variety of materials supplied by Interior Products (Kerfkore, Timberflex, Flexboard and Ultralite) lends itself to numerous applications and options: panels, doors, curtain walls, mouldings and traditional curved millwork. We can use Interior Products in applications where the weight of plywood panels would be impractical.

Using Kerfkore we can create inlays in flat panels, then bend the panel. Applying inlays to already curved surfaces is tedious, if not impossible. Designers and architects have been delighted with the creative flexibility we can offer them.

During the construction of millwork at Nationwide Arena, Columbus (Ohio) new NHL hockey arena, the designers came to us with a fabrication problem. The original design for a concession area included a steel channel in an elliptical shape suspended from the arena's ceiling. When the structural engineers reviewed the plans, they objected to the fixtures the weight was too great to be properly supported. The design team asked us to find a solution. We used Timberflex to create a curved ceiling fixture painted to mimic the steel channel. Even the steel fabricators were fooled, and the fixture was incredibly light. Interior Products gives us options that we never had before.”
Dean Hafey, Dean's Custom Fixtures (Columbus, OH)