Scribing quarter round shoe molding – how to find angle

[bram]

I need to create a small piece of quarter round or similar shoe molding to cover the reveal below a door threshold. The threshold is new and basically level. The door opens into a room with an original wood floor with a pronounced slope along the length of the threshold (about 30”). The slope is severe enough, and the drop from the top of the threshold to the floor is high enough (about 2” IIRC) that any molding tall enough to cover the gap at the end of the threshold where the reveal is greatest, at the bottom of the slope, will stick up past the top of the threshold on the other end. So, to avoid that, and to have the shoe run consistently parallel to the top of the threshold, I think I need to scribe the bottom of the shoe to match the slope. Problem is, I’ve never done this before. I have a table saw with a miter gauge, but I’ve never made anything but straight or bevel cuts. Can anyone point me to a good tutorial? I guess the two things I need to learn are: 1) How to determine the angle at which the floor slopes against the threshold, and 2) how to set the table saw to scribe that angle for me. All advice is appreciated. Thanks.

[suemarkp]

I think you need a tapering jig. Think of two 1x2's face to face with a hinge at one end. Then you spread the open end apart to the desired angle and lock the jig in place. Use this along your rip fence to rip your moulding at the angle of the jig.

Can you just place the moulding along the threshold (perhaps upside down and faced backwards, and scribe a line along the top of the threshold to mark where it should be cut? If so, that marking, and the tapering jig should be able to do what you need. Just make sure when you hold the moulding in the final position, the line you drew is tapering the correct direction.