Joint tapes for insultion boards in bathroom

[RickyLee53]

Hello,

I am putting underfloor heating in my bathroom, we have a large bath, shower and kids, so I fully expect the floor to be like a swimming pool daily.

I have got 10mm concrete backed overboards. (similar to marmox) I plan to screw them down to the existing timber floor. Seal the gaps with a suitable tape, lay cables, SLC then tile.

However the tape seems to be crazy money. £150 approx to do the room. Am I missing something? Whats the best tape/supplier to use?

 

[AliGage]

How big is the area and/or how many linear metres do you need?

 

[RickyLee53]

Hello,

The area is 11sq meters. Its hard to guess as it depends how the boards are laid. I'd imagine around 30 linear meters.

 

[CJ]

Marmox Waterproof Joint Sealing Tape 120mm x 10m on fleabay.

£49

 

[White Room]

I would glue and screw the boards to the floor....