Custom Window Sill FAQ
Answers to common questions about materials, measuring, edge profiles, inside-corner radius and fabrication tolerance. Still stuck? Get in touch or read the measuring guide.
What materials can a custom window sill be made from?
Custom window sills are available in solid hardwood — walnut, white oak, maple and cherry — and solid surface, made to order in your chosen shape, size, edge profile and finish.
How do I measure for a replacement window sill?
Measure the length between jambs, the depth from the window to the leading edge, and for return sills the horn length past each side. The configurator accepts 8 to 160 inches to half-inch precision, with a live drawing to confirm your geometry.
What edge profiles are available?
Eased, bevel, bullnose, cove, ogee and Roman ogee — applied to the top arris, the bottom arris, or both. Visual front thickness runs from 1-1/2" solid stock to a 4" laminated build-up edge.
Can inside corners be radiused?
Yes. Where a return sill’s horns meet the body, each inside corner can stay square or be routed to a 3/4" radius — the standard detail for stone and solid surface — set independently per corner.
How precise are the finished dimensions?
Every sill is made to your exact dimensions, accurate to ±0.5mm.