JLC • NEW ENGLAND EDITION • JUNE 1995 JLC • NEW ENGLAND EDITION • JUNE 1995 Installing stone counters calls for a big crew. Typical 11/4-inch-thick granite counters weigh about 25 pounds per square foot, so a sizeable slab can easily weigh 300 pounds or more. INSTALLING STONE COUNTERS Pay close attention to seams and cutouts if you want stone countertops to be trouble free It's one of those extras that customers ask for. Like asking, "How much for two more skylights?" or "Can I afford a whirlpool bath?" — they want to know what it will cost to make the kitchen counters out of stone, usually either marble