Building A Garage


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Old 08-09-06, 08:20 PM
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Building A Garage

How do I build a garage on an existing slab that is not level? It drops 7 inched from front to back and 2 inches from right to left.

Any suggestions would be welcome keeping in mind I need to stay within the regulations of the building codes and this is in a larger city in the mid west. The garage is 21' wide and 24' deep.

Thanks,
 
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Old 08-09-06, 09:46 PM
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Building A Garage

First, try to find out if the guy that poured the slab was bad, sloppy or if there is a soil/settlement problem.

If the slab is stable, use 6" or 8" thick concrete block to build a level base (above the water & slop), so you can build a normal wood frame garage above the block.

You should be able to get block in different actual heights ( 3 5/8", 5 5/8" and 7 5/8") to minimize the thick mortar joints required to accomodate the elevation differences.

Your problem will be to figure out how to take care of the drainage off the car or from washing.

Dick
 
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Old 08-10-06, 07:34 AM
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If it were me, I would look into getting the slab leveled.
 
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Old 08-10-06, 08:01 AM
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Building A Garage

Slab raising or mudjacking is a good alternate once you have discovered the reason for the differential elevations.

You should still use a course of block to get the wood up from the mud and muck and make cleaning easier.

Dick
 
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Old 08-10-06, 10:08 AM
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You should check with your local building permit folks - chances are you will need more than a slab under your proposed garage. If you do, you might be able to dig a trench around the slab, widened at the bottom enough to meet footing requirements. Or it might just be easier to bust up the slab and start over.
 
 

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