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PWF (Wood Foundation)

A permanent wood foundation (PWF) can provide a durable and energy-efficient alternative to a traditional concrete foundation. Quick to install, PWFs are a sustainable way to increase your home’s living space while also creating a warm and comfortable basement interior. The knowledgeable team at STAR Building Materials is ready to answer any questions you may have about PWF foundation construction or materials. 


  • Durable
  • Increases living space
  • Quicker to install than a traditional concrete foundation
  • Energy efficient
  • Sustainable
  • Variety of plywood and lumber options available


What is a PWF foundation?

A permanent wood foundation (PWF) is a type of foundation most frequently used in residential construction that has below-grade wooden foundation walls made from pressure-treated lumber. 

What is required for wood foundation?

In Canada, lumber and plywood used in a PWF must be certified as treated with chromated copper arsenate (CCA). Fastening nails, staples, and framing anchors must be hot-dipped galvanized or stainless steel. Moisture and vapour barriers must be a minimum of 0.15 mm thick. 

How long does PWF foundation last?

Under ideal conditions, a PWF can last a century or more. 

Will concrete hurt pressure treated wood?

Under ideal conditions, concrete will not hurt pressure-treated wood. However, if concrete becomes damp or water becomes trapped between it and pressure-treated wood, the wood can eventually be susceptible to rotting, thus compromising its structural integrity.

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