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psrs0810 12-17-2010 07:41 PM

Entry Door - Sloping Slab
 
We are looking to remodel our screened in porch (that was screened in back in the 60's). We want to make it a four season room.
My biggest problem is the slab slopes. How do we install a door on a sloping slab?
Do I need to level the slab? If so, can I put sill plates and fill in with concrete?

TheDoorGuy 12-17-2010 07:47 PM

Hi there,
What type of door are you thinking of installing?
What is approximate size that you are hoping for?
Approximately how much does the slab slope?

psrs0810 12-17-2010 08:04 PM

We want to install a single door. We don't know the exact dimension. As for the slope, I did not measure it yet. I would say 2-3" over 10'

Gary in WA 12-17-2010 09:25 PM

May want to check with your local B.D. on this. Many room start as patio slabs to covered slabs to screened walls to roofed rooms to habitable rooms - then it's lacking.... Things like heat, lighting and ventilation are easy. A vapor barrier plastic under the slab, a level floor, thickened slab at perimeter for the windows and loaded walls, 6" or 8" clearance to any wood siding, shear panels for resistance to lateral forces on each wall, etc.....

Gary

TheDoorGuy 12-18-2010 12:03 AM

For a single prehung door with built in threshold I would think that you
could level it up with shims in a couple of spots and then grout under it.
Those thresholds are typically 1 1/8" high so by the time you shimmed up
the low side you could be up to 1 1/2" or more. You could mitigate the
trip factor by putting a fairly thick foot wiping mat inside.

Check your available height for door....Standard prehung inswing door
will require 82" rough opening height. Outswing would be an inch or so less.

GBR makes very good structure comments that I am not smart enough
to address.

Ron6519 12-18-2010 09:48 AM

Quote:

Originally Posted by psrs0810 (Post 552863)
We are looking to remodel our screened in porch (that was screened in back in the 60's). We want to make it a four season room.
My biggest problem is the slab slopes. How do we install a door on a sloping slab?
Do I need to level the slab? If so, can I put sill plates and fill in with concrete?

There's a lot more to converting this space then you know. I'd have a competant authority guide you before you waste both time and money on this project.
Ron


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