GAF Materials Corp.

GAF Materials Corp.'s Timberline Cool Series shingles minimize heat transfer
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GAF Materials Corp.'s Timberline Cool Series shingles minimize heat transfer

The shingles are designed for steep-slop roofs and come in four Energy... More

Building a Net-Zero Energy House in Boulder, Colo.
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Building a Net-Zero Energy House in Boulder, Colo.

A net-zero energy house produces as much renewable energy as the house and its... More

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