June- 2025
Addendum to Windows and doors
Sill pan flashing
What you see is a screenshot from a video from Zip Wall on sill flashings. A piece of siding is put on first. This allows an angle or pitch away from the house.
This video from the Zip System people is only just over a minute long.
Nearly every window and door manufacturer these days recommend sill pan flashings. These recommendations are largely overlooked. Practically every window and door has an installation booklet taped on. If this is lost, a pdf file can be downloaded from the manufacturer's website.
These sill pan flashings are of critical importance on sliding patio doors. Most sliding doors are made with weep holes on the bottom track to allow standing water to escape. On a wood framed house the water runs right down into the framing below, rotting the framing. This is a frequently done stupid thing.
We stuccoed a house in Northeast Washington where the sill pan flashing was put on backwards under a large, expensive sliding door. Every time it rained, water ran into the house because the flashing was angled the wrong way. They even make sill pan flashings premade with a slope. After the owner called for days with telephone terrorism a crew showed up and took out and reset the door. It took 7 people all day and unto the night to reset the door.