The permanent wood foundation is a load-bearing wood-frame designed as a foundation for light frame construction.
It is well suited for single family homes, room additions, multi-level residential buildings, industrial, agricultural,
commercial buildings and can also provide crawl spaces for low rise, residential, industrial, commercial and other
types of buildings. The first homes built on PWF's treated with water-borne preservatives were constructed in
Alberta in 1967 and are still performing well to this day. In 1975 the Ontario Building Code permitted the use of
permanent wood foundations, which was published and referenced in the national and provincial building codes .All
lumber and plywood in the PWF are pressure treated with water borne preservatives. Nails and straps must be
corrosion resistant. Caulking is placed among all wall panels, and between the walls and footings. A moisture barrier
is applied to the outside of the walls to provide additional protection against moisture. The result is a dry basement
that can be easily insulated and finished for maximum comfort and energy conservation.ADVANTAGES OF
PERMANENT WOOD FOUNDATIONS*Basements built out of treated wood are dry, energy efficient and cost
effective*Increased living space since drywall can be attached directly to foundation wall studs*Resistance to
damage, such as cracks to cold weather*Dry, comfortable living space provided by a superior drainage system
(which does not require weeping tiles)*long life based on field and engineering experience*build able during winter
using minimal measures around the footings to protect them from freezing*rapid construction*Cost saving in
construction, particularly when comparing costs of fully insulated and finished basements*Buildings constructed
with wood are a better choice for the environment
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