Plywood Subtop For Granite Countertop

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.

Plywood subtop for granite countertop.

Set granite in place for the sink counter and trace the exact line around the opening for the sink onto the plywood subcounter. For weight calculations 2mm weighs about 13 lbs per square foot and 19 lbs sf for 3mm. Make it about 1 8 larger than the line you drew. Remove the granite slabs that were dry fitted only.

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. Use a spade bit to make a pilot hole in the plywood and use a jigsaw to cut the sink hole. Face frame cabinets that are a little higher may require just one layer of 1 2 plywood strips but the principle is the same. Drop in the sink.

The average thickness of plywood sheets used for backer on counter tops is 3 4 inch. Finish countertop height ends up at the industry standard of 36. I love some of the quartz options that mimick carrera marble but the granite dealer is insisting that i need a 5 8 plywood over the cabinets for support. For 13 16 2mm tops the subtop should be a minimum of 5 8 plywood no mdf or particleboard.

The problem is i don t want the laminated edge look rather i m going for the super sleek thin look that is very popular right now. Now this assumes a full depth granite 3 cm or 1 1 4 thick is used. I just had white shaker cabinets installed and am now selecting a countertop. With this scenario plywood is cut to fit the countertop layout and screwed to the cabinets prior to the stone tops being installed.

The marble institute of america guidelines suggest an unsupported overhang for 2mm of 4 max and 8 for 3mm. This provides adequate support for a wide range of finish materials.