Best saw and blade combo to trim interior doors??

Jun 18, 2005 12 Replies

I have several interior hollow core doors to trim off after installing new carpet and am wondering what would be the best saw/blade combo to use. I'm thinking a worm drive with a 40 or 60 tooth blade but have no experience trimming doors so am looking for someone who has "been there done that" before I butcher them and get in hot water with the war dept.



Rob Mills ~


The saw and the blade have nothing to do with it, assuming the blade i s reasonably sharp.

The best thing would be to make an edge guide to clamp to the doors. This requires more material and assembly. Read through this article:

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It can be done freehand depending on your skill. Mark where you want to cut the door. Using a straightedge, cut through the veneer with a fresh utility knife blade. Do not try to cut right at this line, make sure you cut slightly longer than this line. You only need to cut one side of the door as the blade will give you a clean cut on the bottom, the problem is splinters coming up in the top which get stopped by the knife cut. Make sure that the bottom of your saw is not going to scratch the doors ( a layer of masking tape on the saw's shoe will make sure). A few strokes with a sanding block on a bevel and you are done.

The knife cut on the veneer is necessary with either method. The bottom should be sealed with a coat of paint or varnish to prevent the doors swelling from humidity. New doors' warranties are void if this is not done.

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table saw w/ fine tooth crosscut blade

Maybe it's a case of "when the only tool you have every problem looks like a nail" BUT I find that a belt sander can take a lot of the bottom of a door.

Well my Tablesaw will handle a door....But it is by far much easier to use a straight edge and a circular saw to trim your door.... Makes no difference if the circular saw is a worm drive or not....Just use a good sharpe blade ...

Scoring is a good idea and I would do it...plus I tape the edge from which the blade exits the door...(with a circular saw that is the visible top facing edge...) it would be the bottom if using a tablesaw....

Hint...if the door is a closet door just make the cut so the inside surface would be the side that splinter... but I would still tape and score..

Good luck...Its not really hard to do...

Bob G.

I used a 7 1/4 inch blade on a circular saw. Put the door on a couple sawhorse. Put a board (1 x 3 or so) side to side. Clamp the board on, about six inches from the bottom of t he door. Or as needed for the width of your saw. Run the edge of your saw along the board. That helps make for a straight cut.

Oh, I may disagree with that. I used a "jig saw" one time. What my Dad used to call a sabre saw. Made a straight cut one side of the door, and a curvy ugly cut on the other.

Circular saw works better.

carpet and am wondering what would be the best saw/blade combo to use. I'm thinking a worm drive with a 40 or 60 tooth blade but have no experience trimming doors so am looking for someone who has "been there done that" before I butcher them and get in hot water with the war dept.

Several times I've done this I've used my circular saw and a fine tooth (don't know how many) hollow ground plywood/plastics/laminates blade, wrapping the cut line and adjacent area with several layers of masking tape, never a splinter.

BTW, you should set your line length in OE to 70 characters.

They won't trim them for obvious reasons - it's not their job and there's a chance they'll screw it up and owe you a door.

The worm drive isn't necessarily better in this application. The extra weight is a liability and you don't need the extra oomph. Instead of using a 1x clamped in place, use one of those clamping straightedges. Very useful.

If you use a plywood blade, you'll probably get some burning as they're meant for thinner stock. If you score the cut line, you really don't need one. I usually set the straightedge so the cut is just outside the score line. Then clean up with a plane and chamfer back to the score line. Factory edge.

R

You should slightly chamfer the cut edges so the doorskin veneers with a block plane so they won't splinter. Skew the plane so it slices better.

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