A hipped roof often extends over a home's exterior sides, forming deep eaves to create shade, while a steeply pitched gable roof easily sheds snow and rain. Roofing materials vary by region. In the Northeast, locally quarried slate lasts for generations and soaks up the sun's rays, radiating warmth inside. In contrast, standing-seam steel in the South deflects the sun's heat, keeping interiors cool. In colder climes nationwide, rot and insect-resistant wood shingles provide insulation and protection from the elements for many decades.