Pressure Treated Wood Window Sill

The sill plates were not pressure treated.

Pressure treated wood window sill.

You need to take the stops and or screws off the pieces that hold the wood window in. Prowood sill plate the greenest protection money can buy. Like borate treated lumber it s guaranteed to stop termites and prevent decay plus it s compatible with carbon steel black iron fasteners. Interior walls are within a climate controlled environment and are presumed to be free of moisture.

Pressure treated wood is less commonly used on trim but is sometimes used for window sill applications. Pressure treated bottom plates deal with the symptoms of the problem when a capillary break between wood and concrete deals with the cause. Virtually everything i have seen constructed since that time has been. This makes it much easier to replace the sil.

But unlike borate treated lumber it requires no special handling. 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. This preserves the wood and makes it more resistant to wood rot. Perry mastrovito design pics getty images.

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. 2 points 6 years ago. For almost half the cost you can get a termite treated board called borate.

I was looking at a recently constructed addition the other day. Note that this requirement is only for exterior walls as these may wick moisture onto the lumber. Yes pressure treated lumber is good for the sill but i would take out the vinyl window. Sill plate is a tough versatile pressure treated lumber.

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. People used this for decks long before pressure treated came along. Place your old sill over the selected board and draw its outline with your carpenter s pencil.

If the framing for the building will be 2x6 allowing fewer members and deeper insulation you will need a 2x6 sill plate. Since about the late 1980 s i have been under the assumption that sill plates should be pressure treated wood or decay resistant. Since sill plates have an indoor application pressure treated wood is not necessary. There are many species of wood that are naturally insect and moisture resistant.

This type of wood has been soaked in chemicals then placed in a pressure vacuum to pull the chemicals down into the wood fiber. 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. Just install it as you would pt wood with a sill plate gasket.