Note: Shingle Installation Shown When flashing a valley on a cedar roof utilizing Cedar Breather, the flashing should be applied so that it is in direct contact with the underside of the shingle or shake/interleaved felt and on top of the Cedar Breather and felt. 1.   At valley, install a 24" wide strip of 30 lb. felt on top of Cedar Breather.   2. Install center-crimped metal valley flashing made of aluminum or galvanized steel, 22" wide (8" min. each side for shingles, 11" min. each side for shakes).   3. Install shingles or shakes leaving open valley width of 4" to 8" depending on anticipated water volume. Shingles/shakes should not be applied with grain parallel to valley centerline and those extending into the valley should be cut at the correct angle. Joints between shingles/shakes must not break into the valley.

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