![]() In turn it ends up staining and discoloring the sill surface. When painting the trim, cedar has a tendency to bleed natural extractives through to the surface. It can hold up well to most exterior uses.Ĭedar does have a few drawbacks, however, when used on the exterior of a home. It naturally resists moisture-related rot as well as insect activity. Wood sills can definitely match the trim used on the rest of the exterior.Ĭedar is often used for exterior trim. Masonry and commercial application use metal around windows and for sill material. Metal sills don’t typically match well with other types of trim. Wood, vinyl, and metal material is used to make external window sills. The demands on the external sill often requires the use of a stronger, more stable material. But the choice is more limited than with other exterior trim options. But it also needs to coordinate with the rest of the trim in order to help create a cohesive design.Įxternal window sill materials are available in a few different sizes and shapes. ![]() Window sill trim needs to be strong and durable enough to protect the window opening from moisture entry. This damage will cause poor appearance of the home’s exterior. It is also the first place that begins showing signs of age. Making it one of the more vulnerable parts of the window assembly. The sill is one of the first places to come into prolonged contact with moisture at the window base. The trim and sill also prevents moisture and insect penetration into the window’s opening. The trim and sill design helps the windows stand out from the rest of the exterior look. The sill shows off the window size and shape. Trim emphasizes the design, highlights the doors, windows, and siding, and covers cut edges and gaps in the siding.Įxterior window sills bring added depth to the windows. It completes the home’s appearance and brings the entire style and design together. Trim is the final finishing touch on any exterior. Exterior window sill trim plays a big role in the looks and functions of a home.
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