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Old 12-02-2009, 08:48 PM   #1
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Undercutting without a jamb saw


I have 13' of wainscot that needs to be undercut about an inch so I can lay cement board and tile. I've tried using a saw, hacksaw, chisel, drill and manual jamb saw, and have so far succeeded in remove one 2" board.
I thought it was pine, but it's much harder than that - maybe poplar. Anyway, it's really difficult to cut by hand and will take forever at the rate I'm going.
Don't want to buy a power jamb saw for this one job. Question:
Can I shorten my jigsaw blad to just a little longer than the width of the wainscot boards and use that?
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Old 12-02-2009, 08:53 PM   #2
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Undercutting without a jamb saw


Why cut it ?
Go up to the edge with the cement board
Tile then cover the gap with the baseboard

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Old 12-02-2009, 09:04 PM   #3
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Undercutting without a jamb saw


Buy a Dremel, Rockwell, or Fein oscillating tool. You'll get a lot more use out of one of those.
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Old 12-02-2009, 10:18 PM   #4
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Originally Posted by hayewe farm View Post
Buy a Dremel, Rockwell, or Fein oscillating tool. You'll get a lot more use out of one of those.

ditto -

I bought the Dremel oscillating tool for a project a couple three months ago, have used it for several things. Good ~$100 tool investment.
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Old 12-03-2009, 06:12 AM   #5
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Undercutting without a jamb saw


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Originally Posted by Scuba_Dave View Post
Why cut it ?
Go up to the edge with the cement board
Tile then cover the gap with the baseboard
I'm with Dave, I wouldn't cut it.

But if for some reason you do still need to cut it you could rent a jamb saw reasonably. 13' is more than I want to cut with a multimaster or even a Fein.
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Old 12-03-2009, 07:45 AM   #6
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Undercutting without a jamb saw


If there is no rental place convenient and cutting is a must, another option would be to use a wood blade made for your angle grinder. You'll still have to hand cut the corners, but would make the long runs much easier.
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Old 12-03-2009, 09:11 AM   #7
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Undercutting without a jamb saw


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Originally Posted by Scuba_Dave View Post
Why cut it ?
Go up to the edge with the cement board
Tile then cover the gap with the baseboard
why I would recommend cutting the board is:

this is a bathroom and the floors will get wet or even flooded. The board needs to be cut above the finished floor so if water does get on the floor, the water will not soak up into the wainscot. It would be the same reason you do not set drywall directly on the floor in general.
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Old 12-03-2009, 10:26 AM   #8
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Undercutting without a jamb saw


Actually drywall is held up off the floor to allow for shrinkage, movement, thermal expansion, and hygrometric expansion. Typically it should be held up 1/2" to 3/4" to compensate for the aforementioned movements.

To the OP:
You can rent a jamb saw for around $30 a day. If you prefer you can buy a cheap one from Harbor Freight for around $50.00 but I wouldn't count on it lasting very long.
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Old 12-03-2009, 07:33 PM   #9
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Undercutting without a jamb saw


[quote=ARI001;
To the OP:
If you prefer you can buy a cheap one from Harbor Freight for around $50.00 but I wouldn't count on it lasting very long.[/quote]

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Old 12-04-2009, 12:18 PM   #10
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Undercutting without a jamb saw


Wiil come in handy any time in the future when you need to cut something while on a ladder. You may even find one which uses the same battery as your cordless drill motor!
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Old 12-04-2009, 02:50 PM   #11
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Undercutting without a jamb saw


This thread has been cleaned up
ARI001 & Nap = 2nd warning
If you wish to discuss something then start another thread
If you just wish to argue on & on keep it off the boards

Thank you
-Dave
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Old 12-04-2009, 05:10 PM   #12
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Undercutting without a jamb saw


Quote:
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PAULIE, YOU CRACK ME UP.

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