How Do You Shingle Two Roof Lines That Come Together?
The point where two roof lines come together is called a roof valley. There are several different methods of shingling roof valleys, but one of the most common ways is to lay an open valley, which uses a layer of metal flashing along the valley. Caution must be taken when shingling roof valleys, because a poorly shingled roof valley can develop leaks and cause considerable damage to the roof foundation and the interior of the home. Make any repairs before you begin. Inspect the roof for rot or other problems and address those issues before beginning to reshingle. Measure the length and width of each roof section. Multiply length by width for each area and add the total together to get the roof’s total square footage. Remember to measure dormers and any other extensions. Divide the total square footage by 100 to figure out how many squares of roof tile you will need to purchase. Buy a little extra—10 percent or so—for edges and future repairs. Cover the valley with mineral-surfaced
