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when is an expansion joint needed along perimeter of house?
I want to pour a concrete patio with house concrete block/slab foundation surrounding it on 3 sides, about 12 x 9 x 10 feet per side. Do I need to line the block with an expansion joint material such as asphalt/fiber before the pour to allow for expansion and contraction?
Is a gravel sub-base for the concrete necessary if soil has not been disturbed for 25 years? Thanks, M |
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