Granite is available in a wide variety of thicknesses. The most popular thickness is a 3 cm, or 1-1/4”, thickness but it is also available in a 2 cm, or 3/4” thickness.
The weight of a slab varies, of course, in relation to its thickness. The weight of a granite slab is generally 12-13 lbs per sqft in a 2 cm thickness and 18-19 lbs per sqft in a 3 cm thickness.For example, an 8-foot countertop slab that is 3 cm thick will weigh somewhere between 144-152 lbs. The granite thicknesses can vary as much as +/- 3 mm throughout the slab. Due to the fact that granite tends to not be a uniform thickness throughout the whole slab, installers will compensate for the width variations with added support.
Laminate is generally made up of 1/8” thick panels attached to a ¾” thick wooden product. Solid surface countertop material normally comes in three different standard thicknesses, they are: ¼”, ½”, or ¾”. Soapstone is usually 1-1/4” thick, marble is usually 1-3/4” to 2”, concrete material is generally 1-1/2” to 2”, and finally, engineered stone usually comes in 1-1/4” thickness.