How thick is your granite?
Did you know that there is not an industry standard for the thickness of your granite counters? In the past, companies frequently installed 2 cm granite slabs with a plywood support structure underneath to reinforce the surface. The current recommendation is 3 cm thick granite, 1 cm may not seem like a huge difference, but adding the extra cm means no plywood substructure is necessary.
European Granite only installs 3 cm thick granite, the approved thickness of the Home Builders Association of America. Make sure the company you choose is doing the same.