Trying to help a builder friend out on a new construction and wanted to see what the nachi brain trust thought.
This window had some substantial water damage to the Drywall directly under the interior sill after a driving rain storm. It was all bubbled up in the spot where he Made a cutout. I got there 4 days after the storm.
-He noticed standing water on the exterior sill.
-There is spray foam along the Inside of the exterior Wall.
-The loose fill insulation was damp when I looked at it.
-Moisture meter read as high as 16% in the drywall right next to the opening
-header and sides of frame are totally dry and didn’t show anything on IR when he looked after the storm.
- There are two very small holes in the exterior sill. Looks like what would happen if a finish nail was driven upwards through it.