Plywood Thickness Under Granite Countertop

It offers the most durability size flexibility and color options.

Plywood thickness under granite countertop. 6 cm thick granite countertops. Three centimeters is the preferred thickness for both quartz and granite countertops for most countertop fabricators designers and architects. You need to have a subtop to glue the granite to. When installing granite countertops you will not need an underlayment of plywood if the granite has a thickness of 3 centimeters about 1 1 4 inches.

Remove the granite slabs that were dry fitted only. Make it about 1 8 larger than the line you drew. I will have the following run of cabinets which will be screwed together and to the back wall and will install a 20mm 3 4 thick granite countertop over it with sink and cooktop range. Forum responses cabinet and millwork installation forum from contributor k.

Using proper materials and techniques ensures a reliable long lasting countertop. There is no plywood under the granite. This will prevent it from cracking when there are larger. I ve seem people saying that a plywood backer is important and some other people saying that it is more trouble than it is worth and the cabinets provide.

Typically this support includes a plywood base and an underlayment of cement board. Granite countertops can come in different thicknesses but the preferred thickness is three centimeters or almost 1 1 4 inch. However for granite with a thickness of 2 centimeters about 3 4 inches you will definitely need to use plywood for support. Set granite in place for the sink counter and trace the exact line around the opening for the sink onto the plywood subcounter.

Ultimately they will be stronger and more refined. Strips of the same type of plywood cut to 4 inch widths should be glued or screwed to the edges of the countertop to strengthen this area making it twice as thick as the rest of the countertop. Depending on thickness granite countertops may be self supporting without underlayment. This provides adequate support for a wide range of finish materials.

For a truly eye popping countertop many homeowners stack two slabs of 3 cm granite to create the mastadon. If using plywood merely as a framework for the finish work surface to be adhered to inch thick plywood is recommended for strength. Their 33 extra thickness means you do not need plywood under your granite countertops or extra lamination. 3cm material can go directly on top of the cabinets without the need for plywood support.

Drop in the sink.