Tanking failed AGAIN

[Rossymcg]

As previously posted I had a palace tanking kit peel from the walls 4 weeks after plastering, they sent out another kit peeled again 7 weeks after plastered,,
now over 8 weeks later a mega tanking kit has peeled, it's seriously doing my swede in, any ideas?
I've only ever used painted on kits what are my other options?

 

[Mr Tiler]

are the walls partition?

 

[Rossymcg]

are the walls partition?

1wall dabbed, 1 wall gyplined and insulated with Kingspan forming a cavity from the 9" external wall for insulation purposes,

 

[Sean SML Tiling]

Your either doung something wrong or there is a serious issue with palace tanking. Is it possible to board with schulter kerdi board then use their tape then that would be waterproof

 

[Rossymcg]

Not only the palace tanking also the mega tanking,
i sand down the surface lightly of the plaster, get dust of surface with a dust brush and damp cloth,
prime and then when dry tape and tank,
Not much else I can do reallyreally

 

[afright]

Had major problems a few years back with Palace now I will not use there products.I use the Ardex tanking system never had a problem.

 

[Peter]

What primer are you using and diluting it to the correct ratio?

 

[Sean SML Tiling]

Im yet to use the ardex but have a small bathroom coming up and will be using it as its at a good price in ctd

 

[Ian]

Ardex is the kit to use, it's the only liquid kit I have 100% faith in.

 

[Chalker]

I've been converted to ardex. It sticks like a good un and goes off quick. Write off any tools that come in contact!!

 

[White Room]

I'd be changing the brand of tanking, to many problems.

 

[One Day]

I've been converted to ardex. It sticks like a good un and goes off quick. Write off any tools that come in contact!!

Soak them quickly, in hot water is poss. It will resoften if you get them in quickly enough.
Ruins clothes though!

 

[Rossymcg]

What primer are you using and diluting it to the correct ratio?

With the palace tanking I used the primer that came in their kit and mixed it as per their instructions 1 and 4, with the mega paint I used mega sbr as per their instructions 1 in 3, people say mix it to different strengths but I mix it to the instructions and then I'm never done it wrong come a situation like this,
how much is the Ardex one? I don't really trade with ctd,

 

[Colour Republic]

Couple of questions for you.

how are you applying the tanking? Brush, roller, trowel?
how thick are you applying it, 0.5m 1/2/3/5..mm?

lastly when it peels from the wall, what can you sea underneath, bare plaster or primer?

 

[Rossymcg]

Couple of questions for you.

how are you applying the tanking? Brush, roller, trowel?
how thick are you applying it, 0.5m 1/2/3/5..mm?

lastly when it peels from the wall, what can you sea underneath, bare plaster or primer?

brushing on the tanking, palace tanking is the thick rubbery type that went on about 1 mm thick applied as per the instructions,
the mega tanking only goes on thin maybe 0.5mm has to be painted on in one direction 1st coat then opposite way next coat,
when it's peeling from the wall the primer is coming away from the plaster, on the back of the peeled tanking its a pink plaster coloured haze

 

[Colour Republic]

So it is the primer which is failing then.

Are using the primer neat? in not and you are diluting then what ratio?

Basically the primer is too strong and is drying out before it can get a good bond to the plaster.

 

[White Room]

How much thinning does the primer require....

 

[Colour Republic]

To be fair after just reading the destructions it could be miss read.

However it should be 3:1. But with very dry plaster I would be inclined to do 2 coats. one at maybe 4:1 then one coat at 2:1. But check with technical.

 

[beanz]

You might find that the plaster has been over polished. Give it a sand.

 

[Rossymcg]

I never get the plasterer to over polish, people think it's the sign of good plastering when it looks like glass but the emulsion doesn't key in to it,
i sanded it anyway always do when I'm adhering anything to it,
with the palace tanking I mixed 100ml of palace sbr primer with 400mls of water,
with the mega tanking I mixed 100ml of mega sbr with 300ml of water, this is exactly what the instructions say on the bottles,
ive dine everything right, one rep said to me they'd had problems with thistle finish and peeling but these walls are plastered with multi finish

 

[Colour Republic]

their primers don't seem to work then. As the primer shouldn't peel.

As mentioned, try adrex. Seems bomb proof compared to most other paint on tanking

 

[Rossymcg]

I used the palace primer for the tiles outside of the shower area and they're solid, the tanking that's painted on to the shower tray and aqua panel on the floor is solid, it's just not keyd in to the plaster for some reason,

 

[White Room]

I never get the plasterer to over polish, people think it's the sign of good plastering when it looks like glass but the emulsion doesn't key in to it,
i sanded it anyway always do when I'm adhering anything to it,
with the palace tanking I mixed 100ml of palace sbr primer with 400mls of water,
with the mega tanking I mixed 100ml of mega sbr with 300ml of water, this is exactly what the instructions say on the bottles,
ive dine everything right, one rep said to me they'd had problems with thistle finish and peeling but these walls are plastered with multi finish

Multi is called Thistle Multi Finish but the one that some guys were having problems with is Thistle Uni-Finish which supposedly you did'nt need any pva if plastering a old Artex ceiling for example and causing serious issues.

Can't find it on BG's website, do think they don't sell it anymore....hopefully.

 

[Lee@emctiles]

Ardex is the kit to use, it's the only liquid kit I have 100% faith in.

I know of one coming out next month that you might want to try

Not heard of a tanking peeling, first gut reaction was it was the primer as well.....

 

[Rossymcg]

It's quite a way off next month, I'm gona give the Ardex one a blast,

 

[beanz]

The Weber one is good too..

 

[On one]

The Ardex tanking kit sticks like the stuff that sticks to a passing dog!, shame it comes in the same colour as my pencil lead.....a lighter colour would be helpful Mr Ardex

 

[AMA Tiling]

I've used both and no problems. The mega kit is pretty common in these parts, I'm nearly sure their kit requires the priming done neat. I will go & read one here to confirm. Both kits dry fairly quickly especially the mega one. I normally use weber where I'm supplying myself but I've no probs with either of these. I've even used mega SBR primer for other tiling & no problems. I did have a "Benfer" kit peel on me once. It was green from memory and slightly " gritty". Never seen it again thankfully

 

[Peter]

One to steer clear of is the Everbuild Aquaseal kit. The tape etc is good but the paint doesn't go on very well and takes aaages to dry.

 

[High Peak Tiling]

has the plaster work been polished by the plasterer?