Framing the House, Week Five, September 9-13.
We started putting the 1” foamboard over the osb this
week. Here’s a view of the house from
the north east. You can see the black
plastic flashing above and below the blue foam and on the corner. If any water gets into the vertical joints of
the foamboard the plastic will channel it back out. It will also prevent outside air from
entering the wall. The idea came from Joe
Lstiburek’s book Builders Guide
to Cold Climates. Another
great resource is Joe’s website: Building
Science Corporation: Architecture and Building Science .
Here you can
see the flashing at the deck ledger board.
A film is placed behind the ledger.
A second sheet is fitted up under that sheet from below. The second sheet comes out over the 8’ length
of foamboard below. A small piece of
foam will be fitted on top of the 8’ length and below the ledger. Any moisture that gets behind the ledger will
be kept out of the wall and will flow back to the surface.
We wanted to run the foam continuously behind the
ledger board but Bob was not at all in favor of that idea so this was our
compromise.
An additional strip of plastic flashing will be placed
over the strip that shows above the ledger and then foamboard will be placed
against the wall above the ledger.
Metal flashing will be placed over the foam and behind
the siding to push water away from the top of the ledger.
You can also see the plastic flashing strip at the
bottom of the wall.
View of porch area before foam. You can see the deck to the left of the
porch.
And with the foam in place.
View from the west shore of the pond. Water is trickling in but we’ve had no rain
and plenty of sun and wind so the water level is just holding on. The water level should rise as we move toward
winter.
Friday, August 13, the first of the windows are in
place above the porch roof. The deck is
framed but the railings and stairs are still to come.
