Tiling over existing tiles

[mwss77]

Hi all

Need a bit of advice on this one please, Start a job on Monday that requires me to tile over the existing tiles in a bathroom.

Never had to do this before, the tiles already up are fixed on solid, so what is the best way to prep them before applying new tiles over the top.

I hav heard you can mix pva and sand and paint this over the tiles

Help please.....

Mark

 

[GazTech]

Don't use PVA, just wash the tiles down with sugar soap, this removes grease etc from the surface. Then being a bathroom, a good D2 type adhesive is recommended.....Gaz
BAL White Star

White, highly flexible, non-slip, highly water-resistant ready-mixed organic dispersion ceramic wall tile adhesive utilising the latest raw material technology and employing the highest quality acrylic resins. Conforms to BS EN 12004 for a D2TE Adhesive.

Suitable for use in dry and wet duty locations including heavy duty commercial applications such as communal showers and commercial kitchens. Ideal for use on a variety of backgrounds including cement:sand rendering, plaster, plasterboard, paint, sheets and boards, tilebacker panels and existing ceramic tiles. Suitable for use on worktops.

 

[robbo]

Personally i would always try to get the customer to have the old tiles removed as your never 100% sure how well the old tiles are fixed also with two sets of tiles on the wall it will be double the weight.....

 

[mwss77]

Cheers Gaz, Robbp

The customer is a landlord who wants to sav money et etc and won't allow removal of old tiles.

What do you do about battens etc for getting straight lines

 

[sWe]

Personally i would always try to get the customer to have the old tiles removed as your never 100% sure how well the old tiles are fixed also with two sets of tiles on the wall it will be double the weight.....

I agree completely.

I'd use epoxy primer when tiling on old tiles btw. I'd clean the surfaces using sugar soap and a polishing machine with a rough scotch brite pad first though.

 

[robbo]

If your going to use a good strong adhesive Like Bal white star as Gaz suggested you might not need to use a battern, all depending on size and weight of tile really, just keep checking with sprit level.
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Very handy for supporting battens or straight edges used at the bottom of wall tiling.

Normally nails would be used to secure the batten to the wall. Quite often you will be unable to find any thing solid to nail to. sometimes the opposite, you find the wall too hard

Use these stands to get the batten supported at just the perfect height in seconds

sold in pairs

weight 1.7 Kg per pair




Price: £10.50 £12.34 Including VAT

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You could try these, but i've never used them and don't really know how good they are?

 

[sWe]

When I need to use battens, I normally use stands. Using nails or screws sucks compared to stands, which are faster both when setting up and finishing up, and they don't punch holes in the substrate.

 

[Fekin]

Battons.... faint memory now a days :!blank:

I remember, I used to spend as long fixing up some battons than it did to tile the bloody wall :lol:

I find the best way is to place my first tile at the datum line, tile downwards and get to the first tile from the floor, get it cut and Im done, rinse and repeat

 

[sWe]

Yeah, that's pretty much what I do normally as well, but when the tiles are too heavy compared to their surface area, and they start slipping...

 

[Fekin]

Yeah, but I've never really had such large heavy tiles yet :lol:

 

[sWe]

I did a wall job with some really heavy 12x12cm tiles some time ago, can't remember when exactly. Extruded porcelain, really thick. A real ***** to cut. Weighed close to a kilo each. They slipped fair bit.

 

[Fekin]

Nver had the pleasure yet :lol:

 

[Perry]

don't use bucket can take 2 weeks 2 dry before u can grout it i use PCI 303 primer then cement based adhesive ete