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  #11  
Old 07-06-2010, 05:32 PM
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Default Re: Problems with foundation

Patio and sidewalk maybe, over about 30', but foundations are not normally pitched for drainage.
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  #12  
Old 07-06-2010, 06:05 PM
Peasant
 
Join Date: Jun 2010
Location: Virginia
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Default Re: Problems with foundation

So the "shimming" idea is a bad one? I'd like to avoid having to modify my slab.

fxpose: The slab is about 10' long on the sloped dimension.
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  #13  
Old 07-06-2010, 06:13 PM
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Default Re: Problems with foundation

The term "shimming" is bad, but cutting the cmu or brick to fit the slope is not a problem and is done as a matter of course in normal construction. So long as you can get the top of the first course level-ish, no worries.
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  #14  
Old 07-06-2010, 07:25 PM
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Default Re: Problems with foundation

ubarch......take a look at this member's foundation slab and how he leveled his first course of cmu's:
http://www.fornobravo.com/forum/8/re...html#post93935 (realjaydubs Minneapolis build. 42")
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  #15  
Old 07-07-2010, 04:34 AM
Peasant
 
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Default Re: Problems with foundation

I see what you're getting at. I'll try to do it with an angle grinder and a masonry cutting wheel.
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  #16  
Old 07-07-2010, 07:47 AM
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Default Re: Problems with foundation

And using a bed of mortar between the foundation slab and the first course will make leveling easier. Once the first course is nice and level you can dry stack the rest.

Aside from that, do your trust the existing slab for use as your foundation?

George
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  #17  
Old 07-07-2010, 08:20 AM
Peasant
 
Join Date: Jun 2010
Location: Virginia
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Default Re: Problems with foundation

It looks to have been around since perhaps the 1980s or 1990s, and isn't cracked. It's a bit rough and has a few names scratched into it from when it was wet. My guess is that it's a home job from one of the older owners.

I don't know how to judge a slab for how trustworthy it is, though.

Last edited by ubarch; 07-07-2010 at 08:21 AM. Reason: Date correction
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  #18  
Old 07-11-2010, 01:41 PM
Peasant
 
Join Date: Jun 2010
Location: Virginia
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Default Re: Problems with foundation

Okay, to make things easier I made myself a water level and snapped a chalk line to illustrate what my tilted foundation looks like. I tried to use an angle grinder to cut along the chalk lines, but I didn't have any success. It's a rather large grinder, but cutting only a shallow score through one block took quite a while and eroded the wheel significantly. Is this really the way it's done? It seems like it'll take forever.

Here's a picture of my water level, and the degree of tilt I have. The red line is level with the corner that's just out of the shot, to the left.

So, do I have to rent a giant masonry saw? Someone earlier suggested that I don't really need to correct a slant like this, and someone else said that it was necessary, and I'm not really clear on whether or not using bricks to raise the low cinder blocks is a good idea or not.

Any help appreciated.
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  #19  
Old 07-11-2010, 01:59 PM
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Default Re: Problems with foundation

I've used an old 7 1/4" circular saw with a diamond blade to easily cut around cement blocks. Even your grinder with a diamond blade should do the trick. Those masonry cutoff discs are pretty much useless here.

George
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  #20  
Old 07-11-2010, 02:24 PM
Peasant
 
Join Date: Jun 2010
Location: Virginia
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Default Re: Problems with foundation

What if I tried to level the whole foundation with concrete? It might be cheaper and easier than renting a masonry saw and cutting the cinderblocks.
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