How To Shingle A Valley Existing Roof

Many roofers cut the shingles across because they say it s safer.

How to shingle a valley existing roof. Then your first shingle goes on the side you are going to cut. The next one goes on the low side. 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.

No one of this affirmat. Valleys are tricky areas on a roof where two roof sections meet. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Start by overlapping a starter from both sides of the valley at the bottom.

When you reach the valley lay the shingles over the valley and trim the edges to the chalk line. Use a starter strip or cut pieces for a starter course. Shingle the other side of the valley the same way. Rip cut the starter strip or starter pieces so that they butt up against the second course of existing shingles and are even with the front edge of the existing roofing.

Over driving nails is always a problem but it is especially dangerous in a valley where water collects. For a closed valley the roofer will install the shingles onto the roof deck and extend the asphalt shingles through the area where opposing roof planes meet so that the shingles cover or close the valley area. Attach with nails along the top edge of the strip. You can use a straight edge to achieve a straight cut.

Weave and cut the valley on the highest side of the roof. Begin to install roof shingles on either roof face. Valleys are areas where leaks can more easily occur so they must be done carefully to ensure. You want to lay the shingles from the bottom to the top of the valley.

Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Roof installation how to shingle a valley hd by roofrepair101 more about roofing at. Stop nailing 6 inches from the center. Lift the underlayment out of the way and then lay a 3 ft wide roll of waterproof shingle underlayment in the valley.