How to

How To Tie In A New Roof To An Existing Roof

After the addition roof is framed and sheathed, snap a line on the existing roof shingles 2 in. Choose a roof pitch (3/12) and roof structure (2×6) this places the new roof on top of the existing roof.

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Nail metal flashing in the valleys where the roofs meet, and metal drip edge along the eaves.

How to tie in a new roof to an existing roof. In this video i take show how to proper recover an old roof and make it look like it's a single layer, check it out , you might find useful tips for your new. The ends of the shed rafters. Install bent metal flashing where the old and new roofs meet and on the peaks and metal drip edges along the eaves.

The new flashing should go under the old felt and over the new felt and new roll roofing. To tie into the side of an existing roof, put a new roof truss on the walls of the addition, brace it upright, then snap chalklines on the shingles to mark the center line of the new roof valleys, where old and new roofs will connect. Once all trusses and rafters are set, cover the new roof with osb decking.

Put siding on the new roof end, replacing any removed from the old roof area. Set the last truss or set of rafters for the new roof at the outside edge of the existing roof. The easiest way to tie in the new shingles with the old is with a cut valley (see four ways to shingle a valley).

Cover the roof with roofing paper, overlapping seams generously, then nail on shingles. 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. After nailing down these two boards, dab roofing cement on the nails and along the outside edge.

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. The roofing cement will resist possible leaks overnight. After framing and sheathing the new addition’s roof, snap a line over the existing roof shingles.

Lay roofing paper over the decking, overlapping seams, then nail in shingles; The ridge of the new roof falls well below the ridge of the house roof. You want to be about two inches above the very center of the valley itself.

In this video we show you how to tie in an existing roof with a new roof to avoid any future leaks or issues, putting you back where you started.the roof i a. Up from the valley center, and cut through the shingles. Roof span, snow load, drainage, type.

The big idea is that layers of the lower roof should sit below corresponding layers of the upper roof. There are all sorts of things you have to take into consideration, depending on where the building is. See more ideas about roof, roof design, roof construction.

Kick it or keep it? Bend shingles at the valleys to cover them and tie in with old roof. Now it is time to use a cut valley in order to tie the new shingles in with the old roofing system.

To tie the design together, peter chose to cut the rafter tails off the extend the exterior wall up to the underside of the new roof. Measure between that truss or rafter and the valley rafters with a tape measure and cut short. The lower the slope the further it should extend.

The next question is what to do with the existing eave under the new roof: See more ideas about patio roof, backyard patio, pergola. Roofing nails to the existing structural sheathing.

I am having trouble finding the best way to tie the two together in the valley, as far as the asphalt shingling goes. Depends on the slope of the new roof. Nail oriented strand board (osb) decking over all the new rafters.

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