New here. Some advice

[Jason robus]

Hi all. I'm jason and a diy er. Got to tile a friends kitchen and lounge. Kitchen straight forward concrete floor. The lounge is floor boards nailed to concrete. Can't really backer board it then tile due to height. Can you tile over boards with flexible adhesive as there is no flex in boards and no curling or is it best to rip up boards and tile onto concrete. Any advice would be appreciated. Thanks

 

[WetSaw]

Boards up. If you need to make up the height use SLC or backer board depending on the depth you need.

 

[Qwerty]

Hi Jason. I've moved this thread from the Welcome forum into the Tiling Forum. By all means pop back to the Welcome forum and introduce yourself.

As @pdc says, boards up

 

[Jason robus]

Thanks for the speedy reply. Boards should be 19mm . Tiles are 12 to 13 mm and 5 to 6mm adhesivery. Will then caulk round edge skirting so should be OK. Should I seal concrete with latex or pvc. Cheers

 

[Jason robus]

Latex or pva sorry.

 

[One Day]

Latex or pva sorry.

Definitely NOT pva! Pva reacts with cement and to cut a long explanation short, it's not suitable for tiling at all. Get a specific tiling primer, they're either acrylic or sbr based.

 

[Flintstone]

When I first started tiling, they sold pva in the tile shop as a primer

 

[Dumbo]

When I first started tiling, they sold pva in the tile shop as a primer

Mine did that also. In the past did lots of pva primed installations that have not failed. Never used it for many years now

 

[One Day]

Pva would be fine with ready mixed adhesive. Where it fails is when gypsum meets pva meets water meets cement and even then it's not a certainty. But when it does go with etringite failure, it really goes!

 

[Flintstone]

I remember mixing it up, like curdled milk!