TRIM WINDOW STOOL 5 1/4X 16′ MDF ULSTL538

Precision Window Finish: Trim Window Stool 5 ¼” × 16′ MDF (ULSTL538)

The Trim Window Stool 5 ¼” × 16′ MDF ULSTL538 delivers a durable and elegant finishing detail for your window installations. Manufactured from high-density MDF, this window stool offers excellent dimensional stability, resisting warping or twisting under normal interior conditions. It fits snugly within the sill opening, creating a clean, level surface that transitions smoothly to your interior trim.

Because it spans a full 16 feet, the ULSTL538 reduces the need for joints, which can interrupt the visual flow and weaken structural consistency. Its 5 ¼-inch width gives ample coverage across deeper window wells, and yet it remains discreet when painted or stained to match baseboards or casings. During installation, you can cut it accurately, glue and screw it firmly into place, and make minor adjustments to ensure a flush fit.

Moreover, the precise edges and flat surface simplify finishing work. The stool hides fasteners and provides a stable top for window seatings or ledges. Transitioning from rough window opening to the interior finish, it ensures a smooth line without gaps or unevenness. Because we use consistent MDF density, this model handles sanding, coating, and surface treatments evenly.

In addition, it supports durability in homes with seasonal humidity changes. While solid wood may expand or contract, this MDF stool maintains its shape and keeps your window area looking sharp over time. Overall, the Trim Window Stool 5 ¼” × 16′ MDF ULSTL538 functions as a reliable, versatile component that elevates any window installation with precision, strength, and clean aesthetics.

TRIM WINDOW STOOL 5 1/4X 16′ MDF ULSTL538
Type: MDF PRMD