David and Paul focused on specific installation methods that a) either caused poor weather performance or b) helped solve water damage problems.
Doors and Windows:
Attendees were shown how to make a header drip cap flashing with end dam that would integrate well with vinyl siding. Attendees made sample drip caps using hand-held benders. Much discussion and experimentation centred around how an installer integrated a drip cap with end dam into a vinyl window brick mould with built-in j-channel, which is popular in Atlantic Canada. No solution was found.
Other fenestration installation methods demonstrated were:
- Proper methods of shimming and fastening
- Installation of a sub-sill flashing with end dam.
- Foam insulation application and air-sealing
- Use of backer rod with caulking / shape of bead for best performance
Paul Martin showed photos of water damage to due mainly to poor flashing of a siding installation. Attendees discussed why the water damage occurred and how it could have been prevented. Flashing topics discussed were:
- Kick-out flashings
- Drip caps
- Flashing a round-top window
- Flashing around a bay window
- Flashing at the bottom of a wall and at transition planes in the wall.
- Flashing above a deck
- Flashing and set-off installation of a wall plate for support of a deck.
- Capping beams and columns
- Dos and don’ts of capping and flashing