Reshingle Roof Over Old Shingles

Shingles are designed for flat surfaces.

Reshingle roof over old shingles.

Remove the ridge caps. The following list includes some universal reasons not to reroof as well as some considerations or things to check out if you re seriously considering adding new roof shingles over old ones. If the old ones are flat and you fill in any missing tabs and you do no more that a total of two layers of shingles yes you can reshingle over old shingles. But unless the sheathing is extensively damaged or the structure can t support the weight of another layer of roofing a better solution is to apply a new layer of shingles right over the old one.

Install a layer of roofing felt over the roof before you begin installing the new shingles. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture. The felt should be secured every six inches with nails or staples. If laying three tab shingles over three tab shingles it is important to nest the new shingles against the old to create a flat surface as friedman elaborates just below.

Your existing layer of roof shingles is deteriorating and you need to get a new roof installed. It s worth getting underneath to see. In addition if you overlay over existing shingles you miss the opportunity to install an ice and water leak barrier to your wood decking. If a shingle is.

How to do it remove caps. If your existing roof is old the barrier may not have been applied the last time your roof was replaced. This process starts with a 5 inch starter strip fit along the eaves and set against the second course of existing shingles see figure 2 16. Damaged shingles should be removed to check the decking for problems.

Roofing second layer of shingles roofing. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Doing it now will make it easier to keep the reroofing job clean. One question you might have is can i reroof over existing shingles the answer is it depends state regulations and the condition of your roof both play a role in determining if you need a roof replacement tear off vs cover over.

Damaged decking will need to be repaired before you can install any new shingles. They don t do a good job of bridging over gaps dips or humps including the stepped texture created by overlapping shingles. Step 3 cover the old shingles. Use a flat pry bar.