I am going to install a prefab granite counter (5 ft long) over two 1 ft. wide drawer stacks. This will leave a three foot area in the center to create a desk. I've read a lot online and some postings insist on plywood under the granite. Some insist plywood is not necessary. I am worried if I don't use plywood, the 3 ft unsupported section will crack. Also, some postings recommend using metal rods to further support granite. How does this work and where would I get the rods?
I thought this would be a simple DIY but now I'm confused. Any words of wisdom?