Marking and cutting radius trim can be tricky, and mistakes can be costly. This expert has a super simple method.
How to mark and cut radius trim
I’ve never been good at math so when it is time to install eyebrow/radius casing trim, instead of reaching for a calculator, I just make a full- scale layout table. Drawing on a piece of MDF works best for me. Here is how I do it:
Step One: Draw parallel lines
First, I draw a set of parallel lines representing the inside and outside edges of the side casing trim. I space them the same width of my jamb opening plus 1/2-in.to account for the two 1/4-in. reveals.