
ThermalGuard decking begins as Biewer Lumber’s signature appearance grade product, Select Cut®. Using state-of-the-art thermal modification technology, each board is dried to 0% moisture content. This process has been proven to preserve the material for up to thirty years without the need for chemical additives. Our unique engineered profile accommodates a hidden fastener system while offering an exceptionally smooth finish. ThermalGuard is an impressive alternative to cedar, as well as being more cost effective than composite decking products. An ideal choice for your decking project.

ThermalGuard Benefits:
Environmentally Friendly Features:
FAQs
Q: How does Thermal Modification work?
A: The process of making ThermalGuard takes a normal board and subjects it to high heat. This dries all of the moisture out of the board. Then the heat is raised even further to remove the sugars, starches and nutrients from the lumber. The absence of these food sources makes the wood indigestible to insects. The process also collapses the cell walls of the material, making it very stable and resistant to shrinking, swelling, warping etc.
Q: How long has TMW been around?
A: Thermally Modified Wood (TMW) has been in production since the early 90’s in Scandinavia and Europe.
Q: Do I have to use the hidden fastener system?
A: No, ThermalGuard can be fastened just like normal decking. We do, however, suggest pre-drilling at the end of each board.
Q: Will ThermalGuard warp?
A: ThermalGuard’s production process makes it very resistant to warping or twisting.
Q: Will the board change color if I don’t stain it?
A: ThermalGuard is a natural wood product, unless it is protected from the sun it will aquire a weathered silver-grey tone.
Q: What type of stain can I use with ThermalGuard?
A: An oil based stain with UV inhibitors should be used to retain the natural color.
Q: How often do I have to stain ThermalGuard?
A: Frequency is based on the stain manufacturers recommendation.
Q: How is it cleaned?
A: Sweeping and power-washing are acceptable cleaning practices for ThermalGuard. If power-washing be sure to use the lowest possible PSI setting.
Q: The grooved board is great, but I need a solid board for stairs and trim?
A: ThermalGuard is available in a flat board for top-rail, stairs, and trim boards.
Q: Will ThermalGuard wood burn faster/easier than regular lumber?
A: ThermalGuard burns slower than regular lumber.
Click to download the ThermalGuard Sales Brochure.
Click to downlaod Installation Instructions.
For more information about ThermalGuard, contact us at 1.800.482.5717.












