Plywood Under Granite Overhang

Can you extend the overhang on a kitchen island countertop.

Plywood under granite overhang.

How much is the standard overhang for granite countertops. For countertops that have plywood underneath the granite material screw fasteners. Plywood is an engineered wood that comes in various grades ranging from a through d. Why use plywood for 2cm granite instead of a different material.

The standard overhang for granite countertops is 1 inches 12 inches for an island just like the standards in general. For best results center the brackets so you have them evenly spaced across the overall length of the overhang. The type and thickness of plywood you use depend on the weight and type of the finish material. Well according the marble institute of america you can span up to 2 0 for 3 4 thick granite and 3 0 for 1 1 4 thick granite.

Whether or not a plywood build up is required depends on the edge detail. You can use a variety of types of products as finish materials when building counter tops ranging from granite slabs and tiles to butcher block wood ceramic tile and marble tiles. Sometimes we laminate two pieces of 3 cm material together and in turn require 3 cm of plywood buildup. However 2 centimeter granite needs support under it since it is less sturdy so having a plywood underlayment is a must.

If the 3 cm material is black then try even 12 just don t let your kids play under it. I intend to support the whole countertop including the overhang with 5 8 plywood. What is the granite overhang limit in this case. Grade a is the best quality and most expensive while grade d is the worst.

Supporting a granite countertop overhang under a thin granite slab top a plywood subtop is needed for support and to attach legs. I don t want to do corbels. As for overhang depth 4 for 2 cm and 8 for 3 cm is fair. Question we have a kitchen cabinet job with a peninsula and a 3 4 granite slab.

The granite will be 3 4 thick. August 7 2006. I expect to create a bar area overhang of 12 or 13 inches. Yes you can extend the overhang on a kitchen island countertop.