Can You Recover Your Roof or Do You Need to Tear Off and Replace?
When you are planning to re-roof your home, there are two options for both low slope and steep slope roofs. You can either recover over the existing roof or remove the existing membrane and insulation to get down to the roof deck.
Reroofing over your existing roof saves the cost, trouble, and risks, such as water damage while the roof is exposed. If your roof is structurally sound, most building codes allow for two layers of asphalt shingles and some allow for a third on roofs with a 5:12 or steeper pitch. It is safe to re-roof over your existing roof when the original shingles are not too badly curled and the sheathing is sound.
Choose the Right Shingle for your Reroof.
If you are going to reroof over your existing shingle roof, select a high quality, heavy shingle. A laminated shingle and other heavier shingles do not have to be carefully fitted to existing shingles and will conceal any bumps or irregularities that were present on your existing roof.
Prep for Re-Roofing
- Sully Jones Roofing will inspect your existing roof and roof deck for the number of layers, the soundness of your roof decking and how smooth your existing roof is before determining if you can re-roof or a tear-off is required. We will investigate the strip shingles and replace roof sheathing as necessary before proceeding with a re-roof.
- We will also clip any curled tabs and replace them with new shingle material.
- Sully Jones Roofing will then install a new drip edge on rakes and eaves designed for wrapping around the exposed roof edge giving you a neat, protected edge.
- If your roof has no eaves flashing where needed, we will use a retrofit membrane to seal your roof.
- If we determine that part of the roof requires the removal of old shingles, we will build up areas where the shingles have been removed and where these areas meet the re-roofed areas to insure that we do not create a wear point and that the roof looks smooth.
When Is It Necessary to Remove and Replace Your Existing Roof?
If your home has more than two or three layers of roofing material, you will need to tear off and re-roof. If portions of the roof deck are damaged due to water, rot, or insects, you will need to tear off the old roof before re-roofing. If the decking is thin, ¼” or less, or if fiberboard was used, the nails may not hold and your roof is in danger of blow-off. It may also lack the strength to support an additional layer of roof covering. You guessed it, you will need to tear off to re-roof.
When you are not sure of the condition of your existing roof or whether insulation has retained moisture, the safe bet is to tear off before re-roofing. When you tear off the existing roof, you are guaranteed to find any deterioration to your roof deck so you are assured of a longer lasting roofing system.
Sully Jones Roofing does as many recover jobs as tear-off jobs. We are happy to come out to inspect your roof and advise you on the most cost effective re-roofing approach to take.