Monday, June 6, 2011

Filling in the Sills

The window sill work got started on the weekend.  The timing was dictated by the fact the bay window needs to be fixed into something solid at the bottom - this is a job that needs to be done but not until 1st fix carpentry when the window boards would be going in.

The thing here is to ensure that we dont' create a massive cold bridge by the concrete filling conducting heat into the stone window sills.  To do that, the DPC membrane is pulled up tight on the sill and against that a 1" thick layer of ICF insulation is placed along the DPC.  Then concrete can be poured into the gap between that insulation and the internal ICF wall.  I used can-foam to try and fill any gaps at the bottom or where multiple sheets of insulation were used.


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