What material is placed between the sill plate and the top of the foundation wall?

Sill sealer plays a crucial role in residential construction by serving as a flexible barrier between the sill plate and the top of the foundation wall. This material is typically made from foam or synthetic material and is designed to prevent moisture and air infiltration. By creating a seal, the sill sealer helps to minimize drafts and enhances the energy efficiency of the structure. It also protects the wood of the sill plate from direct contact with the concrete, which helps to reduce the potential for rot and insect damage over time.

This practice is essential for maintaining the integrity of the building envelope and ensuring a comfortable indoor environment. Proper installation of the sill sealer is critical, as it establishes a good seal that contributes to the overall durability and longevity of the home.