Tiling on both concrete and floorboards

bundaegi

Hi,

Hoping for some advice on a tiling project. Looking to lay tiles in a kitchen and small room.

I've removed the existing tiles from the kitchen and wooden floors from the other room. However, the kitchen is concrete floor and the small room (extension) has tongue and groove floorboards (see photos). Have spoken to tiler who is happy to tile the kitchen but can't tile onto the floorboards in the other room. I can't lay plywood over the floorboards as this will raise the level of the floor so it won't match the kitchen (I don't want to have to lay plywood over the kitchen floor too as it's a large area).

Any advice? Should I remove the floorboards in the second room and lay plywood??

Thanks!

agusta

if you take up the floorboards and lay plywood it still has to be crossed over with another sheet of ply.the cross over sheet should really be cement boards.far superior than wbp plywood and marine plywood.The best job is remove the timber floor and put in a concrete floor.

bundaegi

Thanks for the advice. Any ideas what a concrete floor would cost? The room is just under 8 square meters.

Calahonda52

bundaegi wrote: »

Thanks for the advice. Any ideas what a concrete floor would cost? The room is just under 8 square meters.

Cost is not really the issue here, it would take ages to dry out, some reckon 1mm/month....
I would lift the floor boards and put whatever you decide, concrete boards or whatever and then leave an expansion gap at the joint because thats where any crack will form due to differential movement.
When you lift the floor boards, increase the frequency of the noggins to strengthen the floor and reduce lateral movement/rolling of the joists as the chippie may relied on the floorboards alone for such a small area

agusta

Even if you remove the floor boards ,you have to put down 3/4 plywood with another sheet of 6mm marine ply on top to cross over the 3/4 ply,but ideally cross over with 12.5 mm cement board.i dont have an exact costing,but two guys would have the concrete floor in in 2 to 3 hours.You can tile on the new concrete floor after 3 weeks.
Its not very expensive to put in the concrete floor.this will give you the best finish possible.

e.r

9mm magnesium board, on the floor boards ensure its well fixed and free from deflection. Raise the concrete section up with floor leveller. Preformed expansion strip or soft joint were two different subfloors meet. Fix the tiles with good tile adhesive.