Stucco Window Sills

14 products

Stucco Window Sills

Our Stucco Window Sills are engineered in various sizes and shapes to architecturally enhance your home's curb appeal. Sills are engineered with a sloping top, which forces water to run off instead of pooling on the sill, where it can cause possible water damage to your home. They're typically used as the bottom-portion of the window, with the sides and top coming from our stucco window trims category.

Made from light weight polystyrene (styrofoam) with an acrylic-modified cement coating and an embedded fiberglass mesh, our products are visually stunning, cost effective, and durable.

Unlike wood, our materials are inorganic and will not warp, rot or become infested. Unlike concrete, our product is light weight and doesn't require structural engineering, which means it can be easily added as a renovation. Unlike PVC or Vinyl, our materials do not expand and contract, which leads to less wear over time and less maintenance.

Replacing Window Sills

Our product can be used to replace existing wood or concrete window sills. With pre-existing wood sills, you'll want to remove the offending product and properly remedy the area by removing any moisture or mold, then adding a weather barrier before installing our product. With concrete window sills, it's typically easier to notch out the back of our product and simply install it over the existing sill.

Sills are designed to be installed at the base of the window, with the rest of the window framed with exterior window trim.


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exterior window Sill

Window Sills not only increase the curb appeal of your windows, but are also designed to prevent water damage around windows. Sills are designed with a slope running from back to front to force water away from your windows, preventing water from accumulating and leaking into your windows. The inorganic styrofoam, fiberglass mesh and modified cement they are manufactured from ensure the sills will never rot or permit mold growth because of water and moisture.

Because of this, our exterior sills make an ideal window sill replacement for those who have know the trouble of replacing a window sill. Exterior sills may be adhered to brick, stone, stucco, ICF and EIFS and siding.

Common misspellings: sil, cill, cil

Where to Buy Stucco Sills?

We supply exterior window sills for construction projects and renovations across the continental U.S., including California, Florida, Nevada, Texas, Ohio and New York. Are you a designer, builder or architect working on your next project? Contact us today with any questions or to get CAD details for blueprints.

Decoramould is a stucco sills supplier for exterior home renovation, retrofits and alterations throughout the U.S.A. and Canada. Customers can buy exterior stucco sills online, and have their exterior sills purchase shipped directly to them.

Our stucco sills look like high end concrete sills, but weigh only a fraction as much - and often cost only a fraction as much as well. They can be installed during the initial construction of a home or building, or added on as decorative sills after construction. Installation is as easy as adhering them to the wall surface, for more information see installation instructions.