Solid Surface Window Sills
Corian and solid surface sills cut to your opening — seamless, non-porous, and available in 77 colours from stone-look to solid white.
What a Corian window sill is
Solid surface is a cast sheet of acrylic or polyester resin blended with mineral filler — the same material used for seamless countertops. Because the colour runs through the full thickness rather than sitting on a printed layer, a chip or a scratch does not expose a different substrate underneath, and the surface can be sanded back and repolished.
For a window sill that matters more than it does on a counter. A sill takes direct sun, condensation off the glass, plant pots, and the occasional set-down of something hot or wet.
Solid surface sills in place
Why it suits a window sill
Non-porous
Nothing soaks in. Condensation running off the glass sits on the surface and wipes away rather than swelling a seam or lifting a finish — which is why it is specified in bathrooms, kitchens and laundry rooms.
Seamless joints
Two pieces are bonded with a colour-matched adhesive and sanded flush, so a long run reads as one continuous piece with no visible joint. On a mulled run of two or three windows that is the difference between a sill and an assembly.
Heat & sun resistant
It will not yellow or check in a south-facing window the way a finished timber sill can under all-day direct sun. Heat resistant rather than heatproof — a trivet is still sensible under anything genuinely hot.
Repairable
Scratches and scuffs sand out with abrasive pads and the surface is repolished to match. A solid surface sill can be brought back to new years later, which no laminate or veneered sill can.
The colour runs through the full thickness rather than sitting on a printed layer — so a chip never exposes a different substrate underneath.
The 77 Corian colours
Colours run from flat solids through fine particulate to large-format stone and terrazzo patterns. Because the sills are mapped at the true 144" × 30" sheet size, the pattern you see on the drawing is the pattern the piece is cut from — a veined colour on a 96" run shows the vein travelling the length of the piece, not a repeating tile.
- Stone and marble looks — Calacatta Greige, Stonecrest Smoke, Rain Streak and similar veined patterns for a sill that reads as stone at a fraction of the weight.
- Terrazzo and particulate — Laguna Terrazzo, Peppered Terrazzo, Pebble Lane and Stonique, where visible aggregate hides everyday marks well.
- Quiet solids — Artista Mist, Artista Sage, Crème Royale and the flat whites, for sills meant to disappear into the trim.
- Darks — Lava Drift and Excavage, dramatic against white casing but the least forgiving of dust.
Browse all 545 finishes including the full solid surface range →
Popular solid surface colours
Six of the most specified colours, shown as the actual maps the configurator renders your sill with. All 77 are available.
Corian window sill sizes, depth and thickness
Every piece is cut to your measurements from a full 144" × 30" sheet.
| Dimension | How it works |
|---|---|
| Length | Cut to your jamb-to-jamb measurement to 1/16", with a 1/16" reveal per side so the piece drops into an out-of-square opening. |
| Depth | Wall face to frame plus your projection into the room. |
| Thickness | The sheet is 3/4"; a laminated build-up edge makes the front read as 1½", 2½", 3" or 4". |
| Returns & corners | Eared returns past the opening, and a 3/4" inside radius to wrap a bullnose corner bead. |
| Edge profiles | All six machine cleanly. Because the colour is solid through, a deep ogee shows the same colour in the curve as on the face. |
Solid surface or hardwood?
Solid surface for wet rooms, heavy sun, seamless long runs, and where a specific colour matters more than grain. Hardwood where the sill is meant to read as woodwork and match existing trim or cabinetry. See the hardwood range → · Full comparison →
Your solid surface sill, drawn to size.Set the size, pick the finish, and see the exact piece before you order it.
Configure Now →Frequently asked
Is solid surface the same as Corian?
Corian is a brand of solid surface — the original one. The colours here are drawn from the Corian range; solid surface is the generic term for the material category.
Can it be used in a bathroom or over a tub?
Yes, and it is one of the best choices there. It is non-porous, so standing water and condensation do not damage it, and there is no seam or finish edge for water to get behind.
Will a dark colour show dust?
More than a light one, and more than a particulate pattern. If the sill is in a bright room and will not be wiped often, a mid-tone or terrazzo pattern is more forgiving than a flat dark.
Can you match my countertop?
If your counter is solid surface and you know the colour name, yes. Send the name or a photo of the underside label and we will confirm the match before cutting.
Related guides
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