Bathroom floor

[JCH]

Hi all

I need some advice please. We're redoing our bathroom, we had a seperate toilet to the bathroom but now we've made it one big room, so now we can fit a shower in, I've bought a 1200 x 800 preformed wetroom tray for the shower. The shower will be in a corner of the bathroom and will have a glass screen along the longest side with a small (smaller than the width of the shower) swivel panel on the end. Our floorboards are 20mm thick and in good condition, joists are about 400mm centres. We've chosen some porcelain floor tiles that are 500x300 and am trying to find a matching mosaic tiles for the shower tray. I'd aslo like to put a underfloor heating mat in and already have a tanking kit.

Could you tell me what I need to do to the floor. I was thinking of 12mm overboarding the floor, priming and applying the tanking, laying the underdfloor heating and then tiling.

I've read lots about the use of SLC and plastic matting that detaches the tiles from the substrate but am not sure about the SLC and the shower tray and I'd like not to bring the floor level up too much. I've also seen that people remove the floorboards and replace with 18mm ply.

Any advice would be great!

Thanks
james

 

[JCH]

Great, that sounds good. How is it best to tie in the underfloor heating mat? Lay that over the WPC and then float some SLC or tile straight onto the mat?? If using SLC is it best to bring the shower tray up so that the SLC finishes at the same height?

Thanks for the advice

 

[JCH]

I thought the mosaics would follow the falls of the tray better and was told the envelope cuts can leave sharp edges?

Thanks

 

[AliGage]

I'll be honest, I've never run UFH into a wetarea. I have an idea of how I would do it but ill wait and see if someone else pipes up for you. But FYI I would probably use a fibre based SLC and let it stand in the bucket for a bit to naturally start to stiffen, then trowel it over to try and keep the form of the tray.

 

[JCH]

Ok thanks. I don't think I'll take the UFH onto the shower tray, I'll just keep it to the rest of the room.

Thanks

 

[JCH]

So that I can avoid SLC on the tray I'll set the tray up high but how much thickness should I allow for the UFH mat and SLC? I'd like to set the tray so that the SLC ends up level with the tray.

Thanks

 

[AliGage]

You only need to just cover the mat. Especially if your replacing the floor boards. There shouldn't be a need to "level" so in which case allow about 5mm.