Tiling over T&G sub floor

[dougcurry]

I am wanting to tile over a 3/4 inch tongue and grove subfloor laid on 14 inch centered joists.

1. Is it strong enouph or should I put down plywood on top?
2. How should I prime the wooden surface before putting down adhesive?
3. What is the minimum slope/fall for a bath drain pipe?

Thanks Doug on

 

[ishi69]

Wouldn't advise tiling straight onto floorboards probably best to go over the top with 12mm backerboards screwed at 150mm centres. Run the backerboard the opposite way to the t+g. Then use a suitable flexible adhesive. Not sure about the fall in the waste I'm not plumber. Backerboard shouldn't need priming prior to fixing the tiles.