Bonding plaster

[mutley]

Hiya,
apologies in advance as i know this has been done to death, I have searched but seem to be going around in circles...

Can you tile straight onto either bonding or hardwall (both undercoats) ?

I've read threads that say yes, some say no. Does the answer depend on whether you're using cement based or tubbed adhesive, and what if any diffrence does priming make these surfaces ?

I've spoken to the technical line at British Gypsum and they say yes although when I check their site they state that you can only tile onto either finish plasters or Dri-coat :mad2:

I only ask as most of the bathrooms I've seen recently needed replastered rather than just filled with rapid set. I'm happy with my plastering skills but dont want to have to add skim coats if i dont have to. I know boarding out is always an option but sometimes they just wont accept it, never mind that at £5-8 a bag it works out a lot cheaper than rapid set.

Cheers in advance

 

[DHTiling]

Bonding/base coats cannot be tiled to...not stable enough.....but patch/one coat plaster can be tiled , much stronger body to it.....
I use Wickes or B&Q one coat ( white in colour ) and dries like bell metal in a few hours...

 

[mutley]

Dave,
thanks for the quick reply..

Can you explain further regarding being unstable, with my limited knowledge i would have presumed it was similar to a sand & cement background. Not questioning your reply, just trying to understand :stupid:

Having never used one coat what's it like going on and how easy is it to work with ?

Thanks

 

[DHTiling]

Bonding plaster/browning etc is a lot softer than sand & cement for starters and is quite brittle in texture and very porous....it is designed to accept gypsum skims which bite into the surface( gypsum on gypsum) but tiling just pulls away from it in my experiance.....
I have seen tiles fixed to bonding coats and the next day you can literally just pull them off with your fingers and the bonding usually comes with it......that is why IMO opinion it should not be tiled too....
And YES the british Gypsum site does say not to tile to base coats as well......which is strange why you were told this......:huh2:

 

[Olz]

Bonding/base coats cannot be tiled to...not stable enough.....but patch/one coat plaster can be tiled , much stronger body to it.....
I use Wickes or B&Q one coat ( white in colour ) and dries like bell metal in a few hours...

How thick can you go with one coat Dave?

 

[DHTiling]

How thick can you go with one coat Dave?

The B&Q one...yes B&Q...lol lol.....can do upto about 30mm with no slumping...in one go......and it dried very hard as well.......but if skimming in deeper holes etc this will take longer to dry...but i prefer the wickes onecoat it is better.....

 

[Olz]

Ive got a job coming up, the guy had the bathroom plastered, then decided he didnt want the huge skirting boards, so now theres a huge gap between the bottom of the plaster and the wall :mad2:

 

[mutley]

Cant explain their reply, honest I never made it up

Is the one coat easy to work with ?

Last question for the night

Thanks

 

[SnipSnap]

Hi Dave!

Does the "one coat" need also priming with APD or equivalent in order to use cementuos based adhesive? Chears!

 

[DHTiling]

Ive got a job coming up, the guy had the bathroom plastered, then decided he didnt want the huge skirting boards, so now theres a huge gap between the bottom of the plaster and the wall :mad2:

If you can Oli ..chop back a bit and dot&dab some plaster board in.....much quicker for type of job....