A.George Smith responds: You’re not the only one who’s struggled with this problem. You can beat yourself up trying to cut a door or window through a foundation wall.

The easiest way is to rent one of two specialty saws, if available. A Partner ring saw can cut to a depth of about 10 inches (Partner Industrial Products, 905 W. Irving Park Rd., Itasca, IL 60143; 708/773-2801). Or RGC makes a concrete chain saw that cuts to a full 15 inches (RGC Construction Equip., P.O. Box 681, Buffalo, NY 14240; 716/895-1156...

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