Removing the existing clapboards reveals a mix of building papers installed at various times throughout the building’s life.
The Pro Clima DA membrane is stapled to the wall. Air-sealing tape is then applied over the staple lines.
Because the existing openings were so out of square, the crew built the window bucks in place using AdvanTech OSB and structural screws.
Each piece has to be carefully shimmed, plumbed, and leveled to make up for the irregular wall framing.
After I-joists have been installed against the walls, the crew adds blocking around the bucks to complete the rough window frame.
A sill dam nailed to the front edge of the windowsill is flashed with 3M All Weather Flashing Tape 8067.
The window's edge is sealed to the taped sill dam using Pro Clima Tescon Vana tape to form an inner airtight and watertight seal.
Finally, the Pro Clima Solitex Mento Plus drainage plane membrane is sealed to the window with Vana tape.
To preserve the air barrier at the windows, the crew applies Tescon Vana tape to the corners of the window bucks.
While taping the staple lines in the membrane, the crew also tapes the joints where the window bucks meet the membrane on the wall.
The crew cut the existing roof eaves back flush to the wall, using a circular saw to cut through the roofing and sheathing.
To connect the roof and wall air control layers, the open rafter bays are sheathed over and the DA membrane is extended up past the roof edge.
The DA fabric is tucked underneath the shingles. Later, the roofing crew would seal the DA membrane to the roof while applying Grace Ice & Water Shield self-adhering membrane to the roof.
After rolling out Pro Clima Solitex Mento membrane directly over the I-joists, the crew stretches the fabric tight.