We are having our porch redone and I am not sure of the material the
contractor is using. The header (horizontal beam between the entrance
columns) is being replaced and he is using pine. I asked about
pressure treated lumber and was told that pressure treated is for a
continually exposed area. He explained to me that he intended to wrap
the header in aluminum and cover it with soffit?
Is this standard practice as far as you know? No specific types of
replacement lumber were in the contract. We are at a point now where
it can be un/redone if needed, I'm sure at additional cost. I do not
want to address this same issue in 5 more years.
Never heard of soffit under a header.
Your house sheathing is not treated plywood, and it will not rot if covered
properly with siding. Roof sheathing is not treated lumber. Your wall studs
are not treated lumber. As long as the wood is covered/wrapped and properly
sealed against water intrusion, you have no worries. A draw back of using
treated lumber for headers is, treated lumber shrinks, this could cause
rafters to sag a bit in this area over a period of time. Do not force the
person to use treated lumber for a header, unless you take the
responsibility of what happens afterwards. Treated lumber has it's place,
using it as a header is not one of them.
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