Note that this requirement is only for exterior walls as these may wick moisture onto the lumber.
Pressure treated wood window sill.
If the framing for the building will be 2x6 allowing fewer members and deeper insulation you will need a 2x6 sill plate.
Yes pressure treated lumber is good for the sill but i would take out the vinyl window.
Just install it as you would pt wood with a sill plate gasket.
Like borate treated lumber it s guaranteed to stop termites and prevent decay plus it s compatible with carbon steel black iron fasteners.
Place your old sill over the selected board and draw its outline with your carpenter s pencil.
Measure the empty sill space to determine if you need a 2 by 4 pressure treated board or a larger 2 by 6 board.
Pressure treated bottom plates deal with the symptoms of the problem when a capillary break between wood and concrete deals with the cause.
But unlike borate treated lumber it requires no special handling.
You need to take the stops and or screws off the pieces that hold the wood window in.
This makes it much easier to replace the sil.
While we may not care if pressure treated wood has high moisture content it won t rot we certainly do care about the studs connected to the sill they can.
Redwood comes to mind.
Pressure treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade.
This preserves the wood and makes it more resistant to wood rot.
Since about the late 1980 s i have been under the assumption that sill plates should be pressure treated wood or decay resistant.
The board needs to be larger than the sill space.
Since sill plates have an indoor application pressure treated wood is not necessary.
Virtually everything i have seen constructed since that time has been.
Interior walls are within a climate controlled environment and are presumed to be free of moisture.
This type of wood has been soaked in chemicals then placed in a pressure vacuum to pull the chemicals down into the wood fiber.
People used this for decks long before pressure treated came along.
Pressure treated wood is less commonly used on trim but is sometimes used for window sill applications.
Perry mastrovito design pics getty images.
Steel framed buildings often include wood components such as sill plates top plates door or window bucks and sheathing for floors walls and roofs.
The sill plates were not pressure treated.
One part of the foundation is more than 18 inches above grade level.
If you use a flat bar and take the old one apart you will see how it s put together.
There are many species of wood that are naturally insect and moisture resistant.
I was looking at a recently constructed addition the other day.
Consumers and regulators of building construction involving wood components often require pressure treated wood to help protect the components from attack by termites other insects and fungal.
For almost half the cost you can get a termite treated board called borate.
