COUPLE OF QUESTIONs

[southside]

Regarding underfloor heating in a house which has had a pumped screed (one level house) does a decoupling mat Have to be used? even in a area where tiling is small ie 10msq in total will latex in adhesive not do?

Do you have to backbutter large tiles such as Travertine ,porcelin on walls even when using a 10 m trowel?

 

[DHTiling]

Hello.

When you say pumped screed.. is it a cementious screed or an Anhydrite one,..?

 

[The Legend; Phil Hobson RIP]

I would go for de-coupling membrane, with ufh. Back butter all large format tiles, imo

 

[southside]

I would go for de-coupling membrane, with ufh. Back butter all large format tiles, imo

How do these membrane go down do they get glued ,adhesive whats the procedure?

 

[The Legend; Phil Hobson RIP]

How do these membrane go down do they get glued ,adhesive whats the procedure?

The membrane is cut to size, and then fixed using a flex adhesive eg. Mapei keraquick. Mixed slightly thinner than for fixing tiles. Use a 4mm notched trowel

 

[Rich]

Id go for the uncoupling as well.
When you say under floor heating, do you mean in screed (water) or heat mats (electric)?

 

[david campbell]

i would go for de-coupling also tend to need back-buttering with larger tiles

 

[doug boardley]

I'd uncouple too https://www.pureadhesion.co.uk/store/files/PageDocuments/Dural_Crack_Mat_Data_Sheet.pdf

 

[southside]

Id go for the uncoupling as well.
When you say under floor heating, do you mean in screed (water) or heat mats (electric)?

sure its in screed water buddy

 

[southside]

The membrane is cut to size, and then fixed using a flex adhesive eg. Mapei keraquick. Mixed slightly thinner than for fixing tiles. Use a 4mm notched trowel

do you just lay ontop of adhesive or pat it down and do you have to wait a day before you can tile ?

will i still need to use latex with keriquick etc or will the membrane take care of moment on its own?

my worry is that the heating system has not been put on yet and wont be untill after tiling .

Sorry for the questions lads never tiled upon ufh just want exclude any risk factors that might be there.

 

[The Legend; Phil Hobson RIP]

do you just lay ontop of adhesive or pat it down and do you have to wait a day before you can tile ?

will i still need to use latex with keriquick etc or will the membrane take care of moment on its own?

my worry is that the heating system has not been put on yet and wont be untill after tiling .

Sorry for the questions lads never tiled upon ufh just want exclude any risk factors that might be there.

Sorry southside, but ufh should be commissioned prior to tiling. Lay onto adhesive, use plastic/ wood float to expell air. If poss leave overnight ,fill surface of membrane with adhesive then serate as usual for tiling On a solid floor latex plus is not necessary, but if within budget wouldn't hurt.

 

[merlecollins]

Do you have to backbutter large tiles such as Travertine ,porcelin on walls even when using a 10 m trowel?

I always backbutter as procedure with large tiles, you'll get a much better bond - and if you're fixing the trav on the floor, make sure you back skim them to fill any cavities in the stone

 

[The Legend; Phil Hobson RIP]

Just to add, after tiling. Floor should be left for two weeks, then heating brought up gradually no more than 5 deg in any 24hrs to optimum temp. left for 2 days, then brought down no more than 5 deg in any 24hrs. Hope this helps

 

[DHTiling]

It's ok saying to use this and that.. what screed is it..?

Different prep for either screed.

 

[The Legend; Phil Hobson RIP]

Sorry Dave, yeah we haven't established that yet.