Roofing Scam Test: Could You Spot a Fake Roofer?

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What is the main purpose of control joints in a concrete slab?

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Correct Incorrect Control joints are pre-cut grooves that guide where shrinkage cracks happen. They keep random cracks from spreading across the whole slab.

What is the main purpose of control joints in a concrete slab?

To add color patterns
To control where it cracks
To drain rainwater
To support rebar

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