3 4 Plywood Under Granite

As for overhang depth 4 for 2 cm and 8 for 3 cm is fair.
3 4 plywood under granite. I am being asked to believe that my new quartz countertop does not need a solid piece of 3 4 or 5 8 plywood under all parts of it. 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. Some say that 2cm granite needs a plywood base but hers does not have one. If it s approximately 3 4 inch granite you have to have a deck under it.
No problems what so ever. If the 3 cm material is black then try even 12 just don t let your kids play under it. This provides adequate support for a wide range of finish materials. The average thickness of plywood sheets used for backer on counter tops is 3 4 inch.
I intend to support the whole countertop including the overhang with 5 8 plywood. The granite is in perfect condition. A common issue with prefabricated countertops is the warranty or lack there of. If it s the thicker stuff which is about 1 1 8 to 1 1 4 inch and i think that is the centimeter one and i apologize to all our european friends you don t need a deck.
Most prefab granite countertops are a 2cm body but have a 4cm laminated edge. Just like any heavy stone granite can crack if not protected properly. Sometimes we laminate two pieces of 3 cm material together and in turn require 3 cm of plywood buildup. The granite will be 3 4 thick.
Another professional has counseled me to demand the plywood support. However for granite with a thickness of 2 centimeters about 3 4 inches you will definitely need to use plywood for support. 3 centimeter granite is much sturdier than 2 centimeter granite and will not break or get damaged when installed without plywood. Prefab quartz countertops can be a 1cm body with a 2cm edge 1 2 cm body with a 2 4 cm edge or a 2cm body with a 4cm edge.
This can be done with any thickness of material. I don t want. The previous owner put it in about 10 years ago. Whether or not a plywood build up is required depends on the edge detail.
I expect to create a bar area overhang of 12 or 13 inches. Having read a number of threads i am somewhat confused on how to support the overhang of my granite countertop.