How Far Can A Granite Countertop Span Without Support

When you are installing granite countertops it s common to wonder how far can granite span without support.

How far can a granite countertop span without support. Here are some granite countertop support tips to help ensure your new kitchen is free of problems. To give you an idea of granite spans if i am putting a black granite in a kitchen installers will be fine going over a dishwasher without a top. We can span up to 3 0 from cabinet to cabinet when 1 1 4 inch thick granite is used. Quartz is extracted from quarries in the world in crushed granules.

This granite top is doomed for failure the moment someone decides to sit on it unless a support is put underneath it. So we are ok on the first criteria but we exceed the 1 3 criteria by four inches. We spanned 24 for the dish washer using 2 cleats on the rear and end walls. The same could be said with granite at a 50 span unless the granite s own weight took it down.

If your slab is 10 thick you can get away with an overhang that is 1 1 4. Having some steel bars let into the underside of the granite would do the trick however. According to the marble institute of america you can safely overhang granite that is 1 1 4 thick up to 10 without supports. This depends on the thickness of the granite slab that you have.

So you say what about 10. These are combined with resin to make counters in a proportion of 97 quartz and 3 resin. To clear span 36 with no support other than a cleat on the rear wall i think is pushing the limits. Now the granite will be supported on all four sides.

Granite doesn t break for no reason. Therefore the quality of granite and how far granite can span without support varies depending on where it was extracted. The marble institute of america says you can cantilever 1 1 4 inch granite up to ten inches without additional support. If using 3 4 inch thick.