Best Caulk For Sill Plate

In other words caulking is applied where moisture would otherwise penetrate and cause deterioration.

Best caulk for sill plate.

Latex caulking can harden and crack and pure silicone caulking can pull away from the masonry if it becomes wet. Caulking is a sealant that fills gaps cracks nail holes and similar imperfections on the surface. Sill sealer is a pliable foam product that is available in varying widths up to 10 inches wide. The best way to air seal the sill plate is to place a sill sealer also called a sill gasket on the concrete before laying down the sill plate.

Best uses for silicone sealants silicone is very flexible and acts as a water and moisture repellant making silicone sealants the best caulk for windows and bathrooms. Stuff a wad of fiberglass insulation into each opening to support the foam as it hardens see figure a in the horizontal callout. If you have a solid concrete foundation also run a bead of caulk where the sill plate meets the concrete. A filler similar to caulk is generally used to seal these gaps between the sill plate and foundation when the home is constructed.

Fasten the sill plate to the concrete slab following the recommendations of the local building code. Some codes require that the sill plate be bolted to the slab while others recommend a metal. Over time it can crack and chip allowing water to seep or. Look for a sealant labeled minimal expansion.

Use around the perimeter of windows to help seal the window to the header sill jack stud and jamb. Flexible foam sealant designed for use on both wood and masonry is the best type of caulking for sealing the sill plate. If you have a concrete block foundation also seal the openings on top with expanding foam.