Manufacture
According to the National Academy of Sciences CORRIM
report, high amounts of energy are required to manufacture
and transport of wood substitutes.
For example:
- steel studs take 9 times as much energy as wood studs
- aluminum siding uses over 5 times the energy as wood siding
- a 4-inch concrete slab floor requires nearly 21 times the energy of
a wood floor
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In addition, the energy required to grow our timber
supply is free. It comes from the sun.
Use
The cellular structure of Western Red Cedar retards
the passage of heat and cold. Each cell acts as an insulating
agent. According to the USDA Forest Service, wood
roofing and siding have the highest insulation value of
any of the wood substitutes.
Wood has 413 times the thermal resistance (R-value)
of steel, 2,000 times that of aluminum, and 8 times that
of concrete. Consequently, wood roofing and siding help
reduce the amount of energy needed to heat and cool our
homes and offices.
The world's energy supply is dwindling. We must all,
therefore, use products that consume less energy in their
manufacture and help to conserve energy when used.
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Energy Conservation 
