Tiling

Can my joists support the weight of tiles on the 2nd floor?

Anonymous user 01/03/2024 - 2.54 PM

Hi, I wish to lay tiles upstairs in my home but wanted to make sure they are not too heavy and that the joists will be able to support them. They are large porcelain tiles (60x60) and weigh about 20kg/m2 - the cement backer board weighs 11kg/m2 so we are talking about 31kg/m2 of additional weight across 50sqm. The joists are 45cm apart and are 2x8 I believe but will have to double check. The longest distance a joist is unsupported for is 3.86m. The rest of the joists do not go over 2.5m unsupported. Am I overthinking this? Thanks