Scribing a skirtboard to an existing stair - Fine Homebuilding Tip
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Scribing a skirtboard to an existing stair

Typically, skirtboards are sandwiched between the stair stringer and the wall, and are installed before the treads and risers that abut them. That's the easy way. In a recent remodel, I had to put in a skirtboard the hard way—with the treads and risers already in place.

As shown in the drawing, I made a pattern out of taped-together 81/2-in. by 11-in. sheets of paper. Without any measuring, this method yielded an exact profile of a stair that had its share of crooked lines.

First, I snapped a diagonal chalkline at the angle of the stair. This was an arbitrary distance, between 2 in. and 3 in. above the tread nosing. The chalkline represented the top of the skirtboard. Working from the top, I next cut, fit, and taped together pieces of printer paper, filling each triangular space from the tread and riser up to the snapped line. I used scissors to cut the curve around the tread bullnose and tapered the riser cuts in places where the risers weren't plumb. I used the offcut triangles from each piece to reinforce the narrow parts of the pattern.

This process yielded a 14-ft.-long pattern, which I cut away from the wall and taped to a 1x10 piece of skirtboard stock. I aligned the long edge of the pattern with the stock and carefully traced the outline. This paper-doll pattern worked like a charm.





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