Plywood Thickness Under Granite Countertop

Their 33 extra thickness means you do not need plywood under your granite countertops or extra lamination.

Plywood thickness under granite countertop.

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. The average thickness of plywood sheets used for backer on counter tops is 3 4 inch. Make it about 1 8 larger than the line you drew. 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.

It offers the most durability size flexibility and color options. Drop in the sink. Depending on thickness granite countertops may be self supporting without underlayment. Ultimately they will be stronger and more refined.

There is no plywood under the granite. This will prevent it from cracking when there are larger. 6 cm thick granite countertops. 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.

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. 3cm material can go directly on top of the cabinets without the need for plywood support. Granite countertops can come in different thicknesses but the preferred thickness is three centimeters or almost 1 1 4 inch.

For a truly eye popping countertop many homeowners stack two slabs of 3 cm granite to create the mastadon. 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. Remove the granite slabs that were dry fitted only. You need to have a subtop to glue the granite to.

Forum responses cabinet and millwork installation forum from contributor k. Three centimeters is the preferred thickness for both quartz and granite countertops for most countertop fabricators designers and architects. 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. Use a spade bit to make a pilot hole in the plywood and use a jigsaw to cut the sink hole.

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