How to Cut Vinyl Siding at Different Angles

Measure the angle. For the easiest and most accurate results, measure the height at the angle’s highest point and the height at the lowest. Measure and mark these two points on your siding, and then use a straight edge to connect them and create your angled line with a grease pencil.

Lay your marked siding on a flat, stable surface with the edge you intend cutting sticking off the surface’s end.

Clamping the siding down ensures it doesn’t slide while you cut the angle. Clamp your siding securely, but do not mar its fragile surface.

Slip on safety goggles. Any time you cut vinyl siding you, there is the risk of getting vinyl shavings in your eyes.

Put a fine-tooth paneling blade on your circular saw. This blade easily cuts through the vinyl siding while leaving a relatively finished edge free of barbs or other flaws.

Move the circular saw carefully through the siding, following the grease-pencil line. Holding the saw with two hands ensures that you maintain control.

Put the cut siding in place and check your work. If the angle is slightly off, sanding the siding edge increases or decreases the angle’s grade. If the angle is significantly off, remeasure and cut again.