Hey gang,
Need a hand here. I`m about to start a roofing job. It`s a simple pair of gables on a split level ranch. My queary is this…it`s a reroof. I`m roofing over the original asphalt shingles, one layer. I`ve somehow managed to avoid this in years past. I always strip down to the sheathing. Existing shingles are sound and homeowner can`t afford the tearoff. How do I go about step flashing the lower roof where it meets the sidewall. Pull up existing shingles at wall in order to reuse existing flashing? Flash new and tuck behind shake siding? I want to do it right, in case I have to do it again 20 years from now. Thanks in advance!
Jay
J. D. Reynolds
Home Improvements
“DO IT RIGHT, DO IT ONCE”
Replies
Here's one way - keep in mind that I can't see it from here;
Leave the existing flashing in place. Take a hook blade knife and cut off the shingle tabs as they expose themselves below the metal on each step. Usually this means that the scrap of shingle you are taking off is an irregular polygonal shape about five inches up, four over(the horizontal cut), six or so angling down away from the wall, and about seven inches of the bottom butt.
Now your metal is exposed but what is left of the shingles will still shed water because it is woven under the step flashing, making it a good base for your reroof. Then, use plastic roofing cement to seal the new shingles to the flashing as you would with a straight wall flashing. The thickness of the palstic cement is equivalent to the shingle portion removed so the finished roof is stil without excessiver lumps.
If the existing shingles are curled up, let him find someone else to overlay it. I've done as many overlay reroofs as tearoffs so I don't prejudice against them - sometimes it can be best way but only on a sound deck and shingle. If they start to curl, you have voids that don't support the new shingle and they willll break easier.
Now go "DO IT RIGHT, DO IT ONCE"