Thickness Of Plywood Under Granite Countertop

Remove the granite slabs that were dry fitted only.

Thickness of plywood under granite countertop.

The most commonly found granite countertop thickness is 3 cm or 1 1 4 inches. Nearly all stones are found in this size and the slabs can be as large as 105 by 54 inches. Drop in the sink. The average thickness of plywood sheets used for backer on counter tops is 3 4 inch.

However for granite with a thickness of 2 centimeters about 3 4 inches you will definitely need to use plywood for support. Typically this support includes a plywood base and an underlayment of cement board. 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. Forum responses cabinet and millwork installation forum from contributor k. 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. Three centimeters is the preferred thickness for both quartz and granite countertops for most countertop fabricators designers and architects.

This will prevent it from cracking when there are larger. Depending on thickness granite countertops may be self supporting without underlayment. 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. You need to have a subtop to glue the granite to.

Their 33 extra thickness means you do not need plywood under your granite countertops or extra lamination. 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. Using proper materials and techniques ensures a reliable long lasting countertop. Make it about 1 8 larger than the line you drew.

3cm material can go directly on top of the cabinets without the need for plywood support. Set granite in place for the sink counter and trace the exact line around the opening for the sink onto the plywood subcounter. 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.

It offers the most durability size flexibility and color options. 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.