Is salt safe FOR YOUR SIDE­WALK ?

The Family Handyman - - FRONT PAGE -

Con­crete shrinks as it cures, which causes shrink­age cracks. Set­tling and frost heaves also lead to cracks. In­stead of risk­ing ran­dom, me­an­der­ing cracks, pro­vide “con­trol joints” for straight, invisible cracks to oc­cur. You can plow con­trol joints into fresh con­crete with a groover (as shown here) or use a saw when the con­crete is par­tially cured. On side­walks, con­trol joints are needed ev­ery 4 to 5 ft. On wide slabs like drive­ways, place them 10 to 12 ft. apart.

Groover Con­trol joint

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