All concrete will crack. Rebar only stops the cracks from getting huge. Sounds like poor installation, might be too thin, poor prep work or subgrade concrete for a garage pad. can you remember how thick the pad was when poured ? I would pour 5 to 6" for a garage pad if I ever did one again. It's worth the extra $$ for a couple more meters of concrete verse 3.5 to 4" thick cracking. I poured a pad at the cottage over 30 years ago, lots of sand base and about 5" thick. only can see a couple hairline cracks to this day.
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Kim
Gonna get me a 16" perch.
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