Roofing project: Ketwitz residence patio roof
A covered patio roof at the Ketwitz residence was stripped back to the deck and rebuilt with new underlayment, flashing and shingles, and the junction against the house wall was re-detailed to stop water tracking into the wall.
What the work involved
- Tear-off of the existing patio roof covering and inspection of the sheathing for soft spots.
- New underlayment and ice-and-water protection at the low-slope edges where water stands longest.
- Re-flashing where the patio roof meets the house wall — the detail that most often causes interior staining on this type of roof.
- New shingles laid to a consistent line, with the rake and eave edges finished in new drip edge.
- Full site cleanup, with the lawn and beds swept for nails before we left.
Why patio roofs leak
A roof that dies into a wall has one vulnerable junction: the point where water running down the wall meets water running down the roof. If the flashing there is step-flashed correctly, with the siding or trim above it detailed to shed water away, the roof stays dry. If the flashing is simply caulked, the seal fails within a few seasons and the stain appears on the ceiling below. That junction is the first thing we look at on any covered patio or porch roof.
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