Valleys and skylight perimeters concentrate water and are common leak-prone roof details. During this inspection, previous patching and moisture retention were documented visually. Roofing cement can serve as a temporary repair in some situations, but the surrounding shingles, flashing and drainage pattern determine whether a more permanent repair is needed.
What we documented on this roof.
1
Previously patched valley and roof-transition areas
2
Shingle sections remaining visibly wet / dark compared with adjacent roof areas
3
Roofing tar / mastic applied around the skylight perimeter
4
Prior repair locations that deserve focused leak evaluation
Recommended Action
Evaluate the patched valley and skylight perimeter for active leakage and long-term flashing condition, correct drainage or repair details as needed, and continue monitoring the moisture-retaining shingle areas. Full replacement is not recommended from these observations alone without considering the rest of the roof.
