Concrete tiles are not porous. A concrete tile will only leak if it is cracked. As DaveB has suggested, Whirlpool Forums are a source of opinions on this. I also found this document at WA Dept of Commerce.
Concrete tiles are not porous. A concrete tile will only leak if it is cracked. As DaveB has suggested, Whirlpool Forums are a source of opinions on this. I also found this document at WA Dept of Commerce.