Thickness Of Plywood Under Granite Countertop

If using plywood merely as a framework for the finish work surface to be adhered to inch thick plywood is recommended for strength.

Thickness of plywood under granite countertop.

6 cm thick granite countertops. Forum responses cabinet and millwork installation forum from contributor k. This provides adequate support for a wide range of finish materials. Nearly all stones are found in this size and the slabs can be as large as 105 by 54 inches.

3cm material can go directly on top of the cabinets without the need for plywood support. The average thickness of plywood sheets used for backer on counter tops is 3 4 inch. Set granite in place for the sink counter and trace the exact line around the opening for the sink onto the plywood subcounter. 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.

Drop in the sink. Ultimately they will be stronger and more refined. For a truly eye popping countertop many homeowners stack two slabs of 3 cm granite to create the mastadon. It offers the most durability size flexibility and color options.

Typically this support includes a plywood base and an underlayment of cement board. Using proper materials and techniques ensures a reliable long lasting countertop. Their 33 extra thickness means you do not need plywood under your granite countertops or extra lamination. 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.

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. Make it about 1 8 larger than the line you drew. Depending on thickness granite countertops may be self supporting without underlayment. Use a spade bit to make a pilot hole in the plywood and use a jigsaw to cut the sink hole.

There is no plywood under the granite. Three centimeters is the preferred thickness for both quartz and granite countertops for most countertop fabricators designers and architects. 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. Remove the granite slabs that were dry fitted only.

This will prevent it from cracking when there are larger. You need to have a subtop to glue the granite to.