TruExterior products are made with fly-ash, a by-product recovered from coal combustion. When fly-ash is combined with polymers, it becomes a durable material that’s ideally suited for exterior siding and trim. Rigorously tested in various extreme climates, TruExterior products are resistant to moisture and bugs once installed.

Bring On The Rain

Ideal for high humidity and rainy environments

Resists damage from freezing rain, snow and freeze thaw conditions

Ideal for ground contact or contact with masonry

Resists Rot, Bugs and Decay

Poly-ash is an inorganic material that offers no food source to carpenter ants, termites, wood-boring bees and more.

Phenomenal Performance.Remarkable Workability.

TruExterior Siding & Trim offers both and a lasting look while eliminating the need for gluing, gapping and other cumbersome and costly installation techniques.


Designed for use in non-structural applications

Suitable for ground and mansonry contact

Can be used in moisture-prone areas

Installation is the same regardless of the season


Installed using proven woodworking tools and methods

Carbide-tipped blades and bits are recommended for a longer tool life


Accepts common high-quality, exterior-grade fasteners that are suitable for the local environment

Can be fastened close to the edge

No need for pre-drilling

No mushrooming

Pre-Primed – So You Can Choose Your Perfect Color

TruExterior Siding & Trim come pre-primed so you can create the look you want. You can even choose dark colors with the confidence of knowing your paint job will last. 

  • TruExterior products come pre-primed and do require paint
  • No need to prime end cuts
  • Can be painted with any high-grade exterior paint when following the paint manufacturer’s instructions
  • Dimensionally stable, promoting long-lasting paint adhesions, even with dark colors* ƒ
  • Paint lasts longer than on wood because TruExterior products cycle virtually no moisture* ƒ
  • Traditional exterior-grade caulks or exterior-grade wood fillers are all acceptable for filling nail holes

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