The other
The
other is a 1/4″ foam similar to laminate flooring
underlayment. Both materials come in widths to accommodate
2×4 and 2×6 sill plates. I prefer the foam sill sealer for
its ease to work with and what I feel will keep drafts and
moisture from penetrating under the sill plate better. Both
sealers are installed butting up to the chalk line to the
inside of the foundation wall. Both are pushed down over
the anchor bolts till it pops through the sealer.
The exterior finish determines the placement of sill plates
on the foundation wall. If the exterior finish is siding,
the sill plates will finish flush with the outside of the
foundation wall. In this case I like to measure in the width
of my sill plate, 3 1/2″ for a 2×4 and 5 1/2″ for a 2×6. If
the exterior finish is brick, the sill plate will be 4 1/2″
from the outside edge of the foundation wall.
Holes must be drilled in the plates to install them over the
anchor bolts. These 2x plates are usually required to be
treated lumber to resist rot. To locate the bolt hole in the
2x, put the plate up against the anchor bolts.
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