Strictly speaking some tests measure the accessible void the total amount of void space accessible from the surface cf.
Least porous granite.
Most granite is porous to a certain degree and thus susceptible to staining.
But while granite is one of the least porous natural stones that is not the case with marble.
Like all natural stone granite is susceptible to liquid sinking into its surface.
Also granite is immune from the damages of most common household acids.
Porous materials such as granite marble and concrete need to be sealed regularly about every six months says courter.
Porous materials have minute surface holes that liquids may penetrate leaving stains and eventually eroding or cracking the surface.
Porosity or void fraction is a measure of the void i e.
By comparison a more stain prone granite like kashmir white has an absorption rate of 3 5 and would definitely need sealer.
There are many ways to test porosity in a.
Much like granite marble is one of the most common countertop materials chosen by homeowners.
Btw i looked up the absorption rate of my granite and it is 1 3.
This is particularly true for lighter colored stones like santa cecilia granite and white granite.
Staining can be easily controlled by application of a sealer on these surfaces.
Empty spaces in a material and is a fraction of the volume of voids over the total volume between 0 and 1 or as a percentage between 0 and 100.
And really applying a sealer is no more difficult than painting a wall.
Marble countertops are very porous and require re sealing once every few months.
How porous is granite compared to marble.