preparing painted walls

[Guitardedleon]

Always Try to match your primer with your adhesive, if not then Any sort of acrylic primer , by bal weber, Dunlop , mapei or whatever your local supplier stocks, as long as it's not pva !

I have a load of everbuild SBR here left from sealing the sides and bottom of some wbp

Is that suitable?

 

[afright]

Yes I only use SBR have used it for years good all round primer/sealer

 

[Martyn Leeds]

Can it be scraped off? with one of the little scrapers with a new Stanley blade in it

 

[Mr Tiler]

Can it be scraped off? with one of the little scrapers with a new Stanley blade in it

a window scraper

 

[mike1979]

Yes I only use SBR have used it for years good all round primer/sealer

Sbr is amazing I mix it with cement and re fix pool coping and wall coping stones the stuff goes off like iron so you could use sbr instead of acrylic sealer can you if so I will stop using acrylic as I have loads of sbr

 

[White Room]

Can it be scraped off? with one of the little scrapers with a new Stanley blade in it

I find a professional decorators flexible filling knife works for me, less digging into the wall.

 

[area tiling]

Yes mate sbr will also do the job !

 

[Guitardedleon]

Sorry, didnt see the replies


anyway, so far the room is prepped.

what I did:

stripped 90% of the paint off the walls ( absolutely knackering! )
the paint that would not shift , I scored like mad then scraped the loose flecks/dust down
gave it a quick wipe all over

used a 3:1 water/sbr all over - 2 coats and let go off

set the room out and made a cut list. Battened the walls ready to tile in the morning.

should be mainly set to go now.

as an aside:

the main tile is a plain 330x250x8 ceramic and I have a glass mosaic sheet to give it a little something to take away from what would otherwise be a plain room indeed.

when cutting the sheets to length ( say half way through a square ) will a score & snap do the trick?
the sheets are 300x300 grids of small glass squares, I am cutting the sheets down in to rows of 2

I have the worlds worst wet cutter and to be honest never want to use it again if possible!

also when bedding the border I'll need to build up the addy behind, any tips for that? or in general for mosaic/borders

 

[mike1979]

So if I've read this right your putting a 2" border say somewhere in the middle or just below ??? If so I think that's too small it will be a ***** to build that out flush and the weight of the tile above will slightly squash it what I would do is when you get to the border measure out 4 squares batteren it and leave the border till last when everything is set get a scraper and sticky the gap then butter the mosaic hit flush with your grout float let it set a bit then get a damp brush to clean the joints sponge clean job done you could cut the mosaics with a good pair of nippers can be hard until you've mastered using nippers as glass mosaics shatter I hate them wear gloves and goggles trust me

 

[Guitardedleon]

I think I've got that.

so double the height of my border from 2 squares to 4

fit all tiles above & below then, once set, install the border

the border is roughly 3mm, Ive seen guys use the above & below tiles as a guide for like a screed
by dragging a block notched out to the correct depth which leaves behind a solid & built out bed for the mosaic.
is that the right way?

I always wear goggles & gloves, better safe than sorry
I remember slicing my hand on a rough edge once!