Plywood Under Granite Overhang

Having read a number of threads i am somewhat confused on how to support the overhang of my granite countertop.

Plywood under granite overhang.

How much is the standard overhang for granite countertops. 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. Under a thin granite slab top a plywood subtop is needed for support and to attach legs.

Supporting a granite countertop overhang under a thin granite slab top a plywood subtop is needed for support and to attach legs. However 2 centimeter granite needs support under it since it is less sturdy so having a plywood underlayment is a must. 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. Why use plywood for 2cm granite instead of a different material.

Whether or not a plywood build up is required depends on the edge detail. I expect to create a bar area overhang of 12 or 13 inches. If the 3 cm material is black then try even 12 just don t let your kids play under it. As for overhang depth 4 for 2 cm and 8 for 3 cm is fair.

For best results center the brackets so you have them evenly spaced across the overall length of the overhang. The granite will be 3 4 thick. Can you extend the overhang on a kitchen island countertop. The standard overhang for granite countertops is 1 inches 12 inches for an island just like the standards in general.

Question we have a kitchen cabinet job with a peninsula and a 3 4 granite slab. Yes you can extend the overhang on a kitchen island countertop. I don t want to do corbels. Plywood is an engineered wood that comes in various grades ranging from a through d.

The type and thickness of plywood you use depend on the weight and type of the finish material. For countertops that have plywood underneath the granite material screw fasteners. August 7 2006. I intend to support the whole countertop including the overhang with 5 8 plywood.