Window Sill Edge Profiles Explained

The six window sill profiles

• Eased — a lightly softened square arris. Clean and contemporary; the most understated option.
• Bevel — a 45° chamfered face that throws a crisp shadow line. Modern and architectural.
• Bullnose (Radius) — a fully rounded edge. The classic, timeless sill profile and the easiest to keep clean.
• Cove — a concave scoop for a soft, recessed shadow line. A subtle traditional detail.
• Ogee — an S-curve for classic millwork. Reads formal and traditional.
• Roman Ogee — a reverse S, a cove flowing into a round. The most decorative, period-style profile.

Top, bottom, or both

Any profile can be applied to the top arris, the bottom arris, or both edges of the front face. Profiling just the top keeps a flat underside; doing both gives a fully sculpted front. On thicker sills a laminated build-up lets the visible front read as 2", 3" or up to 4" deep while starting from 3/4" stock.

Corners & inside radius

Outside corners can be left square, clipped or rounded. On return (horned) sills, the inside corners where each ear meets the body can be routed to a 3/4" radius to wrap a bullnose drywall corner — set independently per side — or left square for a crisp intersection. See the measuring guide for how returns are measured.

Which window sill profile should you choose?

• Modern / minimal: eased or bevel.
• Timeless / all-purpose: bullnose — the classic sill edge.
• Traditional / period: cove, ogee or Roman ogee.

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