It is the process where roofers install a new roof over your existing one i e.
How to shingle over existing roof to patch a leaky.
Let s start with the good.
Rip cut the starter strip or starter pieces so that they butt up against the second course of existing shingles and are even with the front edge of the existing roofing.
Patch the nail or screw holes by slipping a piece of roof flashing underneath the shingle.
Add a bead of caulk or roof cement to the top and bottom edge of the flashing to keep it in place.
You can save.
The uncut shingle should hang a quarter of an inch over the roof edge.
Continue marking lines every five inches up to the roof ridge.
When you should tear off your roof and start from scratch instead.
Assessing a roof leak.
Use a temporary patch for emergencies or permanently repair you roof to stop water damage from rain and the elements.
Roofing over an existing roof is also called reroofing or an overlay.
Mark the location of the top of the uncut shingle on the felt.
When roofing over your existing shingles can be a good idea.
Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because.
Add a bead of caulk or roof cement to the top and bottom edge of the flashing to keep it in place.
Begin by removing the shingles down to the wood sheathing and slip a strip of adhesive ice and water barrier available where roofing repair products are sold under the soffit main roof joint.
Homeadvisor s leaking roof repair guide provides steps to find and seal or patch holes in your shingles.
It s clearly easier and cheaper to leave the old shingles in place but there s some special prep work involved with a re roof removing vents ridge caps and misshapen shingles among other things and you still have to replace or add new flashing which sometimes can be tricky over old roofing.
Use a starter strip or cut pieces for a starter course.
Why installing new shingles over old shingles can be good.
Attach with nails along the top edge of the strip.
Difference between reroofing and roof replacement.
Add a new layer of shingles which means that there is no tearing off of the old roof.
To remove a damaged shingle lift the.
Fix your roof from the ceiling or attic inside or outside of your house.
Depending on how the roofs join you may have to cut a slot to work it in far enough.