Oceanographers commonly partition the ocean into five zones, which can roughly be divided into three basic realms. TL;DR (Too Long; Didn't Read) The three ocean zones, in order of depth, are the surface, middle realm and deep realm. read more
Lift the underlayment out of the way, and then lay a 3-ft.-wide roll of waterproof shingle underlayment in the valley. Shingle the addition roof, letting the new shingles fold through the valley center and onto the old roof deck by at least 1 ft. Re-lay the shingles you removed from the existing roof. read more