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6/20/2019 at 3:46:59 PM
6/21/2019 at 12:15:36 AM
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Do I need to tear out the existing concrete garage floor before installing new one?
Posted by: Dave from Grassie
6/20/2019 at 3:46:59 PM
I'm tearing down my old garage to build a bigger one. I'm raising the new garage floor more than 1 foot. Do I need to tear out the existing concrete floor before installing new one?
REPLIES (1)
Randy from Roaron Construction Ltd in Langley
6/21/2019 at 12:15:36 AM
If you do not have much difference in elevation between existing cracks you should be fine. The new slab at 12 high should do well with 6 or road base over the existing concrete to remove the possibility of reflection cracks forming in the new slab.
Use a 6 slab with welded wire at a minimum or use a 6 slab with rebar. You can sometimes get away with a 4 slab if there aren't large loads parked on it and the existing slab isn't cracked up.
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