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Roofs
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Roofs
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Types:
Pros and cons of popular roofing materials | RoofGenius.com How to Choose a Roof for Your Home | Today's Homeowner Color: Some of the worst roofing color mistakes I've seen are when a homeowner chooses a hue that almost perfectly matches the siding or brick. It winds up being a monotone, boring, almost lifeless color scheme. Always try to complement your colors instead of matching them exactly. A mix of dark and light colors can accentuate interesting architectural elements, while a mix of similar colors can tone down awkward areas. When using roofing material samples to match or complement your home's exterior colors, look at the shingle sample both in the sun and in the shade.
One federally funded study concluded that the plywood sheathing under black shingles was 10 degrees warmer than an identical white shingled roof on a sunny day. However, the study found less difference between other shades of roofs (grays and browns).
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Valleys:
Woven:
Open: NRCA (Lile) recommends that roof valley flashing metal for open roof valleys should be 26-gauge (0.45mm) galvanized steel or equivalent noncorrosive, nonstaining metal. Open valleys are constructed by installing a metal lining over the valley underlayment using corrosion-resistant metal. The underlayment should be a minimum 36-inchwide polymer-modified bitumen sheet, base sheet or selfadhering underlayment such as: WeatherWatch®, WinterGuard™ or StormGard®
NRCA recommends valley metal be formed with a center line rib or V-crimp 1 to 1 1/2 inch high and 24 inches wide.
Closed-cut:
California valleys (closed-cut or open) For a closed-cut California valley, a vertical run of strip shingles is installed along the chalk line end-to-end with the butt edge toward the valley. California-style valleys are not recommended for valley slopes less than 4:12 (18 degrees). Snow accumulation, frequent intense rainfall incidents and excessive debris accumulation should be considered when deciding to use California-style valleys;
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For shake or clay tile roofs, valleys should have a v crimp.
For roofs with slopes of 12:12 or greater, valley flashing should extend not less than 8" on each side of the valley centerline. For roof slopes less than 12:12, flashing should extend not less than 11" each side.
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3 kinds.
