#11  
Old 04-22-2010, 04:38 AM
Il Pizzaiolo
 
Join Date: Mar 2009
Location: USA
Posts: 1,436
Default Re: foundation depth and frost heave?

Everybody has bought up some good points,, I would go with DMUN and pour over gravel.. The French drain certainly wont hurt either.. you would want of course to pitch your slab to the drain aiding the runoff by giving it a place to go...

Cheers
Mark
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  #12  
Old 04-22-2010, 05:15 AM
Apprentice
 
Join Date: Apr 2010
Location: Chesterfield, VA
Posts: 209
Default Re: foundation depth and frost heave?

How much of a pitch? currently I have it so that from front to back it is about a 1 1/2 inch to 2 inch drop over the 86 inches. I figured that would allow water to run off the slab and when I laid my first course of block I would mud them and make things level. Does that sound like too much pitch? I can still fix it since I have my forms in and my cement guy couldn't come tuesday like he was supposed to.
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  #13  
Old 04-22-2010, 05:57 AM
Il Pizzaiolo
 
Join Date: Mar 2009
Location: USA
Posts: 1,436
Default Re: foundation depth and frost heave?

This is what I found WCD.. which seems to be a pretty general rule,,
Quote:
To eliminate standing water on your slab, it should be sloped away from existing structures (such as your house and garage) a minimum of 1/8 inch per foot, recommends the Portland Cement Association. If proper drainage is prevented because the concrete slab is wedged between two structures, you may need to install a drain that will collect the water at a low point in the concrete and divert it away.
Hope this helps
Cheers
Mark
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  #14  
Old 04-22-2010, 06:00 AM
Apprentice
 
Join Date: Apr 2010
Location: Chesterfield, VA
Posts: 209
Default Re: foundation depth and frost heave?

Well that pretty much tells me my slab is sloped appropriately. Guess I will stop worrying and just get the darn thing done.
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  #15  
Old 04-22-2010, 06:04 AM
Il Pizzaiolo
 
Join Date: Mar 2009
Location: USA
Posts: 1,436
Default Re: foundation depth and frost heave?

The only thing worrying ever solved for me was... Ummmmm Hmmmmm ok, nothing... I agree It sounds like you are good to go,, Now just get the *&$#@ cement truck there

Cheers And good luck with your pour
Mark
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