How To Shingle Roof Over Existing Shingles

Mark the location of the top of the uncut shingle on the felt.

How to shingle roof over existing shingles. If a shingle is. A single length of drip edge wraps roof corners with the rake flashing overlapping the eaves for good drainage bottom. The uncut shingle should hang a quarter of an inch over the roof edge. Shingle a roof over existing shingles save 75 give or take.

Use a flat pry bar. No missing shingles no gaps no holes in the roof no soft spots because of water damage. Use 1 5 or 1 75 inch roofing nails. To shingle on top of existing shingles there are a few things you want to make sure.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. Remove the ridge caps. There are already two layers of shingles on your roof most building codes only allow two layers of any type of roofing on your home.

Doing it now will make it easier to keep the reroofing job clean. Roofing second layer of shingles roofing. Position one of the uncut shingles on top of a trimmed shingle. 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.

Depending on the type of job the author uses several specialty drip edge profiles including one with an extra long leg designed to cover existing shingles and drip edge at right in top photo. Use the chalk line to mark the line at that spot across the roof. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. 1st and foremost your existing roof needs to be in reasonable shape.

Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. You need to tear off the roof and install a new one.