tiling exterior covered porch with 3/4" osb subflooring
Chances are your project is ill fated if the proch was built the standard way.
Need to know a lot more info on how it's built, type & size of joists, spacing, span, species & grade. How level it is, which cement backer you're planning to use, and is the OSB guaranteed for exterior use. More to it than that, but let's start there.
Tile 4 You LLC Troy, MI
KERDI Shower Specialist ... DITRA Installs ... Product-Method suitability consultation. I have NEVER made a mistake, I thought I did once...........but I was wrong! - PRODUCTS ADVERTISED WITHIN MY POST ARE NOT ENDORSED BY ME!