Shingling A Roof Over Old Shingles

Use 1 5 or 1 75 inch roofing nails.

Shingling a roof over old shingles.

That s also why building codes commonly limit re roofing to no more than two layers. Leave the old valley flashing in place and install new over it. Rather than ripping off your old roof and putting a new one down you simply add a layer of shingles to your existing roof. As long as it s done right and under the right conditions installing new shingles over old ones can last as long and look just as good as a complete re roof.

To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. No missing shingles no gaps no holes in the roof no soft spots because of water damage. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. How to do it remove caps.

Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in. Whether it is the right choice for you depends on your home and the condition of your roof. If a shingle is. How to roof over existing shingles.

Use a flat pry bar. See below for a shopping list tools and steps subscr. Place the top of each starter shingle firmly against the bottom of the shingle immediately above it and even with the eaves then nail it into place. Has the same manufacturer s warranty.

If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. This involves less labor dropping. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Installing new roof shingles over old effectively doubles the weight of the roofing so you have to make sure your roof structure can handle the extra load.

Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. Ask this old house general contractor tom silva reveals the best ways to secure shingles to a roof. Manufacturers will still warranty the roof for the same amount of time as a re roof as long as it s done by a qualified installer. To shingle on top of existing shingles there are a few things you want to make sure.

Remove the ridge caps. Shingle a roof over existing shingles save 75 give or take. Doing it now will make it easier to keep the reroofing job clean. Looks just as good and lasts as long.

1st and foremost your existing roof needs to be in reasonable shape.