Wetroom Sub floor not level

[DavieA]

Not 100% on best option so am opening it to the forum,

Installing wetroom with preformed tray, the floorboards run off so requires leveling and Iam wondering whether to

lay 18mm ply,
lay ufh mat
Slc
homelux mat
addy
tile

or

backerboard
lay ufh
slc
addy
tile

Any better options or suggestions??

 

[Dougs Third Go]

insulation board, ufh, slc, addy and tile would be my choice.

 

[DavieA]

insulation board, ufh, slc, addy and tile would be my choice.

Ive been a ply man up to now but feel maybe its time i move on:smilewinkgrin:.

If you used a cement board as you have suggested such as dukkaboard, lay ufh, slc then tile is that sufficent water proofing as I notice you wouldn't use a mat?

excuse me If ive picked you up wrongly but as I said im new to cement boards so any info's helpful.

Cheers

 

[Dougs Third Go]

it was more of a wedi type board I was suggesting Davie, wedi board is waterproof as long as you tape the seams and screw heads.

 

[DavieA]

Ah I see, I noticed when looking at the dukkabaord that it also states it is waterproof when the joints and taped with their waterproof tape so I guess it must be similar to wedi.

I think the waterproof boards screwed into the floorboards and as you suggested joints taped is a good idea as i take it will waterproof the floor so not require any tanking matting etc?

I assume ufh mats stick to the boards and that slc will also bond without a problem?

Thanks

 

[Dougs Third Go]

I've never used or come across dukkaboard Davie so I don't know it's properties. If it's a cement board like hardiebacker it doesn't mean it's waterproof but water resistant,,water will pass through a cement board.

 

[DavieA]

I've never used or come across dukkaboard Davie so I don't know it's properties. If it's a cement board like hardiebacker it doesn't mean it's waterproof but water resistant,,water will pass through a cement board.

Here is the best description of its properties, maybe you will be converted from wedi


DUKKABOARD Tile Backer Board Panels are made from extruded rigid polystyrene covered both sides with a glass fibre reinforcing mesh and coated with a synthetic mortar. Dukkaboards can be used in situations where Wedi or Marmox boards are specified, as they have similar properties and are easy to cut using a Stanley knife and straight-edge.These boards are impervious to moisture and rot proof. They also have very high thermal insulation properties and are ideal for use with under floor heating systems. The boards can be screwed to walls or floors using the countersunk washers shown below or bonded to solid walls using metal dowels and flexible adhesive.The Dukkaboards are screwed at 30cm centres with 9 fixings per sq. metre.The joints between the Dukkaboards should be covered with the joint reinforcement tape for extra strength. PLEASE NOTE that any joints between boards or fixing holes drilled through them need to be sealed with either waterproof tape or the Mira tanking products listed on the waterproofing and tanking page if the Dukkaboards are being used in a wetroom or shower.