The Great GREEN Story of Bildrite® Sheathing

Over 100 years ago, in the tiny town of International Falls, Minnesota, the Minnesota and Ontario Paper Company had assembled a special team to find a use for excess fiber screenings - a byproduct of paper pulp manufacture at the time. It was discovered that these waste fibers were ideally suited for a thermal insulating material, and on May 1, 1914, the first continuous sheet of insulation board was produced.

Today, the board is manufactured from high quality northern hard‐wood fiber, residual sawmill wood chips, recycled card‐board, and it even includes a natural binder. These materials create a high strength, high density grade of fiberboard sheathing and with wax impregnation, it has superior moisture resistance.

Why Upgrade to Structural Fiberboard Sheathing?

By meeting or exceeding the requirements of Type IV (wall sheathing), Grade 2 (structural) within the specification for Cellulosic Fiber Insulating Board (ASTM C208), Structural Fiberboard (SFB) is compliant with the relevant sections of the 2012, 2015 ICC‐International Building Code (IBC) and the 2012, 2015 ICC‐International Residential Code (IRC) as a wall bracing panel. It can be used as a continuous sheathing as per IRC R602.10.4. Method 4 (CS‐SFB). End conditions are comparable to Wood Structural Panels (WSP) but require 32” minimums. Design guidance can also be found in the American Wood Council SDPWS (2015). See bulletin for details.

As an added benefit, the interlacing of the wood fibers creates millions of miniature air spaces. This characteristic allows the board to resist the passage of heat. At the same time, these air pockets play a vital role in the board’s ability to reduce sound transmission when added to a wall assembly with gypsum. The vapor permeance of the board allows the wall to breathe for quicker drying resisting mold, fungi, or rotting of the wall system.

What does this mean?

Easy installation that is rapid and efficient with less material lists and less hassles for the constructor. In the end, strong walls mean safe houses with no warranty call backs. A product that has stood the test of time ‐ it is the ultimate sheathing!

Figure 1: Illustration shows general fastening pattern for structural application for sheathing