GAF Materials Corp.

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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 Star-qualified colors More

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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 Star-qualified colors More

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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 occupants use. It is a concept that was almost unthinkable just a few years ago. More

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