Tiles won’t stick to bsa membrane

[Krystie]

hi advise is needed please I’m not a professional, we installed a wet room in December
Maxxus former
Bsa membrane
Mapei flexible adhesive
Ceramic tiles
Thought we had done a good job however this week we have noticed some of the tiles are squishing water through when we lifted said tiles they don’t seem to have stuck to the mebrane what have we done wrong.

 

[widler]

Did you comb the adhesive or put dabs under the tiles ?

 

[Bill]

Did you prime the membrane before you put the tile adhesive on it?

 

[Boggs]

Pictures always help.

 

[Time's Ran Out]

@Tom Astley - Prime the membrane?

 

[Waluigi]

Any UFH in the wet area?

 

[Bill]

@Tom Astley - Prime the membrane?

Yeah - I always do.

 

[One Day]

It's a bitumen membrane.
Why oh why oh why (etc etc etc) do people still install these?
Cement just doesn't like bitumen.
Underfloor heating definitely doesn't like bitumen.
Hot water makes it melt and release oil into the already weak adhesive bond.

With these membranes, if installed correctly you will achieve waterproofing. But in my experience everything on top gets ruined.

 

[Dumbo]

It's a bitumen membrane.
Why oh why oh why (etc etc etc) do people still install these?
Cement just doesn't like bitumen.
Underfloor heating definitely doesn't like bitumen.
Hot water makes it melt and release oil into the already weak adhesive bond.

With these membranes, if installed correctly you will achieve waterproofing. But in my experience everything on top gets ruined.

Am I right in thinking impey still have it as an option , if so why as waterguard is a far better product .

 

[widler]

Impey is brilliant, im sure impish doesn’t mean them