French Door Install On A Not So Level Floor

 
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Old 08-11-2017, 08:33 PM   #1
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French Door Install On A Not So Level Floor


I need to install an exterior 6' french door on a concrete slab that is 1/4" out of level. What is the best way to level this up? I was considering a self-leveling underlayment- any thoughts?

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Old 08-11-2017, 08:45 PM   #2
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Re: French Door Install On A Not So Level Floor


That's not a terrible idea if you have the patience to make up a form.

The last couple I did I opted for a cup wheel on a grinder and took out the high spot.

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Old 08-11-2017, 08:56 PM   #3
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Re: French Door Install On A Not So Level Floor


Yeah, that's the way I would go if it were just high points, but this slab is sloped, so I would be taking out more material than I care to.
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Old 08-11-2017, 10:37 PM   #4
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Re: French Door Install On A Not So Level Floor


I'd shim it. Long tapered shim.
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Old 08-11-2017, 11:03 PM   #5
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Re: French Door Install On A Not So Level Floor


1/4" in 6'?
I wish half the houses I have to work in were that level.

Shim it and make sure there is enough support under the sill so when everybody steps on it, it won't move.
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Old 08-12-2017, 09:28 AM   #6
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Re: French Door Install On A Not So Level Floor


Shim it, get the installation done, then fill the void with dry pack


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Old 08-12-2017, 10:29 AM   #7
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Re: French Door Install On A Not So Level Floor


Just install it, nail the side fins, then support it with whatever.

Also, if it is only a 1/4 inch, you may be able to just install it to the slab slope. It should run with the siding. The last single window I just installed was 2 inches out of level in 4 feet. However, so was the shed. Best opening and closing window I ever did. :grin:

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