Hollow sounding Porcelain tiles recently laid.

[Gazzer]

Just been asked to tile and UFH onto bitumen , I explained why I wouldn't d it and they actually agreed after I pointed out potential problems.

 

[gubbins]

Good grief, this makes my botched adhesive over UFH job sound positively pro..

 

[Jonnyd]

Hello again,

Well my tale of woe has just about reached a conclusion, with most of the tiles becoming loose and the builder not reeplying to my phone calls. So I am in need of a solution to fit underfloor heating over ashfelt flooring/bitumen. i.e. I don't really want to raise the floor by much, so if there something I can put over the floor, then lay the UFH wire, and then porcelain tiles. Also does anyone recommend a builder to do this who lives in the Preston/Lancashire area of the North West. Many Thanks, Jonny

 

[Mike]

Doesn't sound like a quick fix unfortunately, keep us updated and good luck

tapatalk on my HTC

 

[The Legend; Phil Hobson RIP]

Jonny you need a pro tiler, not a builder. PM sent. There are enough tilers who don't know how to prep a job, let alone builders:mad2:

 

[Jonnyd]

Hello again, I have just taken 2 tiles up which were very loose and found that the adhesive has not stiuck to either tile.
It is also incredibly dry and comes away from the screed self levelling compound without damaging it. I am hoping that this will mean I can take up all the tiles, remove the adhesive, gently so as not to damage the UFH, and relay the majority of the tiles. I will obviously have to get some new tiles just in case any break.

Can anyone recommend an appropriate adhesive and grout, should they both be flexible?

Regards,

Jonny

 

[SJPurdy]

the adhesive not being adhered to the tile or screed could be (is probably) due to the heating being switched on to early and drying the adhesive before it had chemically cured/adhered properly. Yes both adhesive and grout should be classed as "flexible" (ie. minimum class c2 adhesive and cg2 grout). If you are having a tiler to rectify the work then i would let them examine the job and supply an apropriate adhesive. Please ensure the heater wires are switched off and the fuse removed for safety - also monitor continuity etc during the work (its no good sticking tiles down again if wiring is accidentaly damaged). Steve