Plywood over floorboards

[mutley racers]

Hi, i am going to do some tiling and upstairs on the floor there are flooboards. What size plywood do i need to put down to tile on?

Thanks for the help guys.

Regards

Lee

 

[Alan.P]

Can you take the floorboards up as this will keep your height down, what size floor, any bounce in it, what tile type and size.

 

[Stef]

15mm british standard minimum.

If you can i would lift floor boards add extra dwangs (noggins) to strengthen floors & lay min 18mm ply then overboard with 6mm backerboards.

That way you should only be 6/8mm above where your floor level is now.

Try & take out all deflection on the floor, Good prep = Good floor.

 

[mutley racers]

Thanks for the quick response and such good advice. What are packer boards and where can i get them?

 

[Stef]

Tile Backer Boards, a few different manufacturers, depends where in the country you are & what tile stores you have.

You could order them from 1 of the forum sponsors, PHG wetrooms or U-Heat.

As Alan said above, what tiles & what size?

 

[mutley racers]

The tiles are 200x400. The floor is quite small. About 4 square metres. The whole job is 13 metres square. All walls are solid brick. So do i dot and dab aqua board onto those?

 

[Stef]

The tiles are 200x400. The floor is quite small. About 4 square metres. The whole job is 13 metres square. All walls are solid brick. So do i dot and dab aqua board onto those?

When you say "solid brick", whats covering the bricks? Bonding then plaster?

 

[White Room]

Has all the wall finishs been hacked off back to brick..

 

[Alan.P]

The tiles are 200x400. The floor is quite small. About 4 square metres. The whole job is 13 metres square. All walls are solid brick. So do i dot and dab aqua board onto those?

I would lift the old floorboards, 2 reasons, 1) so as to be able to add extra noggins to stop any deflection ( bounce ) 2) to keep the overall finished floor height to a minimum. Once the old boards are up and nogins in, 15 - 18mm wbp ply, fixed at 300mm centres, prime the underside and side edges of the ply before fixing, do this with an SBR primer, your local supplier will know. Then fix your backerboards down with a decent flexi adhesive.

 

[Rich]

Here is a link to a post I put up a while ago about preping ply floors, might be worth a read

[h=3]Plywood floors...[/h]