Use enough water to mimic heavy rains.
Roof sheathing help leak tight.
As described above water collects on the top of windows and is forced to the window s edge where the flashing leads water beneath the foam.
Begin soaking low on the roof just above where the leak is visible inside the house.
Nail the drip edge to the roof sheathing at roughly 18 24 spacing intervals using roofing nails.
Flexible roof sealant apply flexible roof sealant black jack roof patch rubberized roof cement from a can or tube to fill holes gaps flashing and loose shingles around roof vent new vent shingles replace worn out roof vent with a new one and shingle around it to provide a better roof leak repair.
Sometimes the water shows up at a ceiling spot distant from the leak.
The use of rigid plastic foam sheathing is also becoming more common in residential construction.
If you tuck window flashing under the foam sheathing you may create a leak.
Run water over the low side of the penetration for several minutes while the helper watches for any water droplets.
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.
Begin by removing the shingles down to the wood sheathing and slip a strip of adhesive ice and water barrier available where roofing repair products are sold under the soffit main roof joint.