Tying In Roof To Old Edge

Once new trusses are secured sheath the roof with oriented strand board osb lay down roofing paper then nail on shingles.

Tying in roof to old edge. Make a cutting on one of the sides of the horizontal roof beam on an angle. Butt the first new truss against the old one. For example if a roofer is doing a repair job on a relatively new roof and the flashing appears to be in good condition it may be salvaged. On a tin roof the uppermost purlin lies just beneath the top edge of the metal.

Ask this old house general contractor tom silva demonstrates the importance of a properly installed drip edge subscribe to this old house. Save those old shingles and number them for replacing later. Attach the horizontal beam by using a nail gun. Remove two shingles to each side of the new valleys until you reach the bottom.

You have to do it thoroughly so that the rafters sit flush on it. Old flashing may begin to fail before the new roof s lifespan is over. To do this we had to extend the plane of the shed roof out over the porch roof creating a small triangular extension of the existing roof. The bottom of our blind valley was about 30 inches short of the bottom of the porch roof so we extended the line of the valley down to the edge of the new roof.

However there are limited circumstances where a roofer may decide to reuse flashing. After that to make it flush with the roof of the existing house cut the two outer rafters. Insert a neoprene screw every 12 inches along the top flat edge of the endwall flashing into the purlin beneath. Then install new ridge board tying it to the old roof by cutting back part of the original ridge board so there is overlap.

Starting two courses higher than where the new ridge meets the old roof unseal the shingle tabs a thin flat bar or a joint taping knife works well and pop the nails of the overlying course. Connect a flat roof to a sloped or pitched roof with a ledger board.