Backsplash

The back splash is usually made from the same granite used for the counters, but it can be ceramic tile, or some other product. It may be attached to the counter or to the wall, but in either case the seam between the counter and the back splash will be sealed with caulk. The standard height for a back splash is 4" although they're frequently made higher if the customer desires.  A tall back splash is sometimes used behind the kitchen range or sink to protect the wall from grease splattering or other stains.

This may be modified to suit personal taste, but it must be stipulated before the template is made. Granite can be cantilevered up to 14" if it's a large piece with sufficient support on the fixed end. It should never be cantilevered where it might receive excessive stress, however, such as where someone may be tempted to sit on it or use it as a step stool to change a light bulb. In these cases, it must always be supported.

It's always best to assume the worst and add proper support on any extension over 6". An unsupported span of no more than 36" is usually acceptable as long as the stone is supported on both sides of the span.