Debris like leaves pine needles or twigs can trap water against the roof.
Roof leaking at side edge.
Rotten or missing trim or siding can allow water to leak behind flashing and into your roof.
Damaged missing or worn out flashing is a common cause of a roof leak on an external overhang.
Nail along its upper edge.
Points to the installation of ice and water shield along the lower roof eaves protecting against ice dam leaks that are common on un vented roofs in cold weather or snow climates.
Replace any missing or rotted siding above the step flashing on dormers.
Flap to bend around the front of the dormer.
Let s examine a few common causes of leaks so you can keep an eye on your roof.
Dig out any cracked or dry caulking that isn t properly sealing adjoining surfaces and replace with silicone caulk.
Make sure you keep the roof clear so water will spill over it fast.
Notch the first step flashing leaving a 1 in.
Run the water over the place where you think the leak might be located.
This means the expanse of shingles slate shakes whatever.
If your roof is older it is possible that the leak is within the roof field.
The sagging first row of shingles is a clear sign of a problem below.
Other materials such as slate concrete tile or clay tile may not be so forgiving.
Once water has infiltrated into the flashing it can soak into the trusses and other roofing.
If you don t want to wait for rain to look for the leak try bringing the garden hose up on the roof.
Dormer leaks can be caused from a number of issues.
Depending on how the roofs join you may have to cut a slot to work it in far enough.
Add shingles and additional step.
Recaulk the corner flashing if any areas have hardened caulk.
This should cover the most leak prone areas.
Run the base flashing 4 to 5 in.
A roof leak at the edge of a dormer can allow a lot of water to enter your home.
If your roof is asphalt then you can walk around with ease.
Worn out flashing or missing sealant can also cause roof leaks around dormers.
Looking for roof leaks on the outside of your house.
Here s a few reasons why roofs leak at the edge.
1 backed up gutters the photos below show a roof edge that has suffered from long term backup of the gutters.
When pulled back at the edge it was ugly.
Roof sheathing rotted all the way through below.
Then reshingle sliding metal step flashing behind the fascia board the trim behind the gutter.
You can crack roofing if you walk on it so be careful.
It should overlap another piece of ice and water barrier laid below all the way down to the roof edge.
Be sure to start small.
Beyond the dormer and cut the top section along the dormer edge.
Don t go crazy with the water.
