Thickness Of Plywood Under Granite Countertop

Depending on thickness granite countertops may be self supporting without underlayment.

Thickness of plywood under granite countertop.

3cm material can go directly on top of the cabinets without the need for plywood support. You can use it as a stand alone product as well as a finish type plywood if it has a laminate finish that you can paint or finish according to personal preference. Three centimeters is the preferred thickness for both quartz and granite countertops for most countertop fabricators designers and architects. Remove the granite slabs that were dry fitted only.

There is no plywood under the granite. This provides adequate support for a wide range of finish materials. Use a spade bit to make a pilot hole in the plywood and use a jigsaw to cut the sink hole. For a truly eye popping countertop many homeowners stack two slabs of 3 cm granite to create the mastadon.

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. 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.

6 cm thick granite countertops. You need to have a subtop to glue the granite to. The most commonly found granite countertop thickness is 3 cm or 1 1 4 inches. Set granite in place for the sink counter and trace the exact line around the opening for the sink onto the plywood subcounter.

Make it about 1 8 larger than the line you drew. It offers the most durability size flexibility and color options. This will prevent it from cracking when there are larger. If using plywood merely as a framework for the finish work surface to be adhered to inch thick plywood is recommended for strength.

Ultimately they will be stronger and more refined. Drop in the sink. Using proper materials and techniques ensures a reliable long lasting countertop. The average thickness of plywood sheets used for backer on counter tops is 3 4 inch.

This allows the homeowner to choose a slab that permits long runs of cabinetry and features fewer seams or creates a single slab that covers the entire kitchen. Forum responses cabinet and millwork installation forum from contributor k.