What Size Plywood Under Granite Countertop at Countertop

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What Size Plywood Under Granite Countertop. On the east coast, 1 1/4 (3cm) is common. In general, should i be putting in 5/8″ or 3/4″ plywood on top of these cabinets to receive slab.

Abstron 60 inch Mahogany Double Bathroom Vanity Optional Countertops
Abstron 60 inch Mahogany Double Bathroom Vanity Optional Countertops from www.pinterest.com

Another reason to use plywood as a base: Besides, what size plywood do you use for granite countertops? I am helping my sister install her 3/4” quartz countertop this week.

Abstron 60 inch Mahogany Double Bathroom Vanity Optional Countertops

Make sure the plywood does not overhang the outside dimension of the cabinet. Another professional has counseled me to demand the plywood support. Thick slabs usually require a solid plywood base to support the weight. However, for granite with a thickness of 2 centimeters (about 3/4 inches), you will definitely need to use plywood for support.