Ask the pros-April 2010
By Reggie Bullard
| Dormer or
I have a "one-coat" stucco home and have recently experienced significant leaks during heavy tropical rains as hurricane remnants passed through our area. The leak is occurring at the intersection of a dormer and the main roof, which is asphalt. I inspected the shingles and found no damage or holes. I noticed that in certain locations the step flashing is visible (the shingles do not fully cover the step flashing -- there is ~1/2" gap in some locations).
patch this gap with some roof sealant or is the
fix to install counter flashing. Are there any
other locations I
should inspect or problems I should look for on the
With no counter flashing, the step flashing will likely leak, particulary in cold weather. This can happen even when the stucco goes down all the way to the roof. There will invariably be a gap between the roof and the stucco. Remember, also, that stucco is porous an water will go through.