Re: Granite Countertop Underlayment
When it comes to sheer strength support you can go down to as thin as 3/8" for walls. For countertop support I'd go 3/4" as it's the thickest ply you can get. When it comes to sheer strength in walls you're looking at the lateral strength so thickness isn't as important as tearability. But in countertops thickness does count as weight can vary, such as a 250-lb carpenter standing on that granite counter with no underlayment or supports too far apart to handle that load.
For granite you can seal it to protect the underlayment. If you're using tiles or non-continuous slabs with grout then you should seal at least the grout annually. For marble countertops sealing is a must as marble is porous.
Escondido100 when you're in the Hilo store come visit me I work at the Hilo 8453 store. You must know John Bey. He does the estimations for our store for price quotes. You may also know Mark Kitagawa of Big Island Countertops who imports granite countertops from China by the container.
When it comes to sheer strength support you can go down to as thin as 3/8" for walls. For countertop support I'd go 3/4" as it's the thickest ply you can get. When it comes to sheer strength in walls you're looking at the lateral strength so thickness isn't as important as tearability. But in countertops thickness does count as weight can vary, such as a 250-lb carpenter standing on that granite counter with no underlayment or supports too far apart to handle that load.
For granite you can seal it to protect the underlayment. If you're using tiles or non-continuous slabs with grout then you should seal at least the grout annually. For marble countertops sealing is a must as marble is porous.
Escondido100 when you're in the Hilo store come visit me I work at the Hilo 8453 store. You must know John Bey. He does the estimations for our store for price quotes. You may also know Mark Kitagawa of Big Island Countertops who imports granite countertops from China by the container.
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