Help needed with Bathroom Tiling

[chris316]

Hi

This is my first post on here, so please be gentle, and bear with me.

I am for tiling my bathroom, walls and floor. And I have a few questions which I would be very greatful if someone could answer, or give me some advice.
My bathroom has plastered walls which had been painted with emulsion paint. Originally I was going to just key the walls and tile over. But when I keyed the walls the paint came away in places so I decided to remove the paint from all the walls, right back to the plaster.
My questions are:

1. After removing the paint from the walls you can still see where the
walls have been keyed/scored right back to the blockwork/undercoat
plaster. Can I tile the bare plaster walls with the key marks, or will the
key marks have to be filled up prior to tiling?

2. Do the plaster walls still need to be keyed/scored now that the paint has been removed?

3. When removing the emulsion paint and keying the walls there are small
areas of the wall where the finish plaster was very thin and has come
away. What would be the best filler to use to patch the
walls up, or would I need to re-skim the walls?

4. Do I need to prime the plaster walls prior to tiling. If so what would be
the best primer to use?

5. I have also had to re-plaster a bit of the wall where I installed a new
shower. Can I tile on top of this new strip of plaster straight away?
or do I need to leave it to dry properly, and if so how long do I need
to leave it?

6. Finally, I also plan on fitting a new plywood floor, does this need to be
primed and if so, again what would be the best primer to use?

Sorry if my questions are a bit long winded.

Thanks
Chris

 

[mikethetile]

its the way it dries

tubbed adhesive dries by water dispersing into the tile and substrate and also evaperating through the grout joint

once the tiles are grouted the addy cant set properly in the centre of the tile

with the tiles over a 100mm2 theres no way of telling wether addy has set up enough to grout, it could take days or even weeks to set

with a cement based addy it dries by chemical reaction and willl set behind any size tile

 

[chris316]

its the way it dries

tubbed adhesive dries by water dispersing into the tile and substrate and also evaperating through the grout joint

once the tiles are grouted the addy cant set properly in the centre of the tile

with the tiles over a 100mm2 theres no way of telling wether addy has set up enough to grout, it could take days or even weeks to set

with a cement based addy it dries by chemical reaction and willl set behind any size tile

OK,

By the sounds of it then, I might be best to go for the cement based adhesive.

Regarding priming the walls, have you any recommendations on what primer to use?

By the way, thanks for your help and sorry if my questions sound very basic or stupid, its just that I have never tiled before and I want to make sure that I am using the right adhesive and preping the walls right in order to avoid retiling in 6 months time.

 

[faithhealer]

nothing wrong in asking questions chris, as you can see tile shops don't know it all. Not familier with larrson products but generally people like to use the adhesive manufacturers own primer.
I would be looking for a standard (slow) set addy for your walls as opposed to a rapid set then you can take your time, white would also be better as I assume your grout will be light coloured.

Is there a shower involved here chris? if so do a search on here for 'tanking'

FYI I stripped two or three bathrooms last year where the addy was still not set after a couple of years

 

[paulyoung666]

By the way, thanks for your help and sorry if my questions sound very basic or stupid, its just that I have never tiled before and I want to make sure that I am using the right adhesive and preping the walls right in order to avoid retiling in 6 months time.

and you think you have asked loads of stupid questions , i must have asked 10 times as many as you when i did my kitchen :lol: , every one was answered very helpfully as well :hurray:

 

[chris316]

nothing wrong in asking questions chris, as you can see tile shops don't know it all. Not familier with larrson products but generally people like to use the adhesive manufacturers own primer.
I would be looking for a standard (slow) set addy for your walls as opposed to a rapid set then you can take your time, white would also be better as I assume your grout will be light coloured.

Is there a shower involved here chris? if so do a search on here for 'tanking'

FYI I stripped two or three bathrooms last year where the addy was still not set after a couple of years

Yes there is a shower over the bath.

I have read on here about tanking, but I'm not sure exactly what this is.

 

[paulyoung666]

Yes there is a shower over the bath.

I have read on here about tanking, but I'm not sure exactly what this is.

basically it is waterproofing the wall , various different products to do it with , and everyone will suggest something different , you watch :lol:

 

[doug boardley]

something like this Chris
[ame=http://www.youtube.com/watch?v=pigKorqimGk]YouTube - Durabase wp wet room tanking membrane dura-wp[/ame]

 

[chris316]

Would I really need to tank the walls above the bath?
Since the shower is only going above the bath and it is not a full height shower enclosure that I am for fitting?

 

[paulyoung666]

Would I really need to tank the walls above the bath?
Since the shower is only going above the bath and it is not a full height shower enclosure that I am for fitting?

how much do you reckon you have spent on tiles / adhesive / grout
/ trim etc ?? , would an extra £100 or so to g'tee peace of mind break the bank ??

 

[faithhealer]

A paint on type tanking system might be easier than a membrane for a beginner, they cost about 50 quid chris

 

[The Legend; Phil Hobson RIP]

A paint on type tanking system might be easier than a membrane for a beginner, they cost about 50 quid chris

Hi chris, as faith, paint on is easier. Mapei Gum is good I use membrane, mostly, but it can be tricky if you are not used to it. Corners, tape etc. I would go with Mapei Gum and their tape/ primer. It seems to do the job, good luck mate

 

[Scott]

Is it an occasional use shower?

 

[chris316]

Is it an occasional use shower?

Yes.

So, If I prime all the walls with an acrylic primer and tank the walls above the bath. Can I use the same cement based adhesive on the primed plaster walls and the tanked walls or would I need 2 different types of adhesive?

 

[mikethetile]

yes you use the cement based right through

 

[chris316]

yes you use the cement based right through

So, just to make sure I have got it right:
1. First. I need to change the ready mixed showerproof adhesive the tileshop sold me to a cement based adhesive.
2. Prime all the walls and floor with an acrylic primer (Do I prime both sides of the ply floor or just the underside of the ply which is not being tiled?)
3. Tank walls above the bath with a tanking paint after priming all the walls. I have seen this one on screwfix, would this be ok? (Dunlop Shower Waterproofing Kit - Screwfix.com, Where the Trade Buys)
4. Tile walls and floor
5. Grout tiles

Is the Larsen's flexi tile adhesive for the floor which I was sold (details of the adhesive, I posted earlier in thread) ok?