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JoshuaBaron 03-26-2009 09:47 AM

How do I cut trim diagonally?
OK... so my downstairs bathroom is 90% complete, but I am stuck on 1 issue. I am trying to place trim around a door, just adjacent to an inside corner. The area is too narrow to place the full width of the trim -- which would make for an easy job with my table saw... BUT the area available for trim is 2" at the top of the door and 1.5" at the bottom of the door.

How do I cut this piece with my table saw? Do I use the miter to make an angle cut? If so, how do I figure out the angle to cut (a review in trigonometry needed here)?

Or... do I use 1.5" trim and fill in the hole with joint compound?

As always, thank you guys!

47_47 03-26-2009 10:19 AM


Originally Posted by JoshuaBaron (Post 250519)
Or... do I use 1.5" trim and fill in the hole with joint compound?

No. Rip a piece of scrap approx 6" wide slightly longer than the trim. Mount your trim to the top of the scrap with screws from underneath. Offset the trim on this scrap to get your taper and run both pieces along the fence. I would also rip it on a slight back bevel.

You could also scribe it to the wall and cut it with a jigsaw.

Maintenance 6 03-26-2009 03:07 PM

Or hand plane it after you scribe it.

12penny 03-27-2009 06:53 AM

Or just freehand it on the tablesaw.

jpsmith 03-27-2009 07:44 AM


Originally Posted by 12penny (Post 250930)
Or just freehand it on the tablesaw.

Don't do this. Freehanding on a table saw - especially a taper cut - is asking for serious injury. If you're comfortable with using a table saw and have a good cabinet saw, the suggestion to make a taper-cut jig is the best. If your table saw is a contractor saw, don't even attempt it. Contractor saws aren't very precise, and their outfeed tables are way too small to support your work well. You could rig up some horses to serve as outfeed support, but it's still kind of flimsy.

If you don't have a cabinet saw and aren't familiar with using a table saw, I'd go with the jigsaw suggestion. Scribe the casing to the wall then follow the line with the jigsaw. Try to angle the cut back a wee bit to get a good tight-looking fit up against the wall. If you've never scribed before, google for a tutorial; there are plenty out there.

Edit: Actually, even if you have a cabinet saw and are good with it, the taper-cut jig probably isn't the best idea. Chances are it's not a perfectly straight taper from 2" to 1.5". It probably has some curve and imperfection to it. Scribing is your best bet.

Willie T 03-27-2009 10:47 AM

Jp's on the beam. And for Pete's sake, NEVER use drywall mud as a filler like that. The stuff cracks... always!

Learn the easy art of scribing.

12penny 03-27-2009 10:58 AM

To all.... I've forgotten where I am. Never free hand a cut on your tablesaw! Scribe and plane.

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