Tile on to Gypsum screed (gyvlon low latance)

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Discuss Tile on to Gypsum screed (gyvlon low latance) in the Canada Tile Advice area at TilersForums.com.

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proview1122

looked into tiling on this forum and elsewhere I am thinking of doing sand / scrape off screed, vacuum, Gypsum adhesive, ditra matting , cement adhesive (white), tiles ( 600 square porcelain60 meters, travertine French pattern 25meters )

using Gypsum adhesive saves priming (several coats) and it will stick to the screed! there are a couple of cracks in the screed usual places doorways ect the ditra is a bit bet and braces but it is for myself so money saved on primer helps with cost of Gypsum adhesive and ditra.

has anyone any recommendation for who to go to for the adhesive it does not seem to be on many web sites have found ditra at £220 a roll is this a good price cheers
 
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proview1122

Bri said:
Here's a better price for your ditra Search results for: 'Ditra'
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better price yes but it isn't ditra I don't want to find out there are more problems with dural matting, they may have solved them but ditra has never had a problem.


just something else, spoke to tecnical at Norcross re their Tile on Gypsum adhesive to stick the ditra down they say absolutely NOT. Primethe screed several coats then use cement adhesive whereas granfix csa say no problem with screed to ditra. This is why its such a mine field

stewart
 
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Ajax123

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proview1122 said:
better price yes but it isn't ditra I don't want to find out there are more problems with dural matting, they may have solved them but ditra has never had a problem.


just something else, spoke to tecnical at Norcross re their Tile on Gypsum adhesive to stick the ditra down they say absolutely NOT. Primethe screed several coats then use cement adhesive whereas granfix csa say no problem with screed to ditra. This is why its such a mine field

stewart
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I can see the need for ditra under the trav but why you putting it under the porcs?

The different advice on the addys is because they are different materials as far as I know.

Another one to look at for the ditra and the porcs would be h40 ideal from kerakoll. If you use this one though do not prime with the ditra
 
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proview1122

Ajax123 said:
I can see the need for ditra under the tray but why you putting it under the porcs?

The different advice on the addys is because they are different materials as far as I know.

Another one to look at for the ditra and the porcs would be h40 ideal from kerakoll. If you use this one though do not prime with the ditra
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2 cracks running at an angle to the line of the tiles and they open close due to the thermal expansion I don't want these transferring through to the porcs

You and some others will know that they are different materials, but for an ordiary sod like me just tring to fix tiles down they are both made and marketed to go on anhydrite screeds

thanks for the other make but I don't think I will better my price of £21 inc the drat for granfix csa

Stewart
 
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Ajax123

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£21 for CSA is a super price. Understand the need for ditra now you've mentioned instability. Just as a belt and braces do you ow if the cracks open when heated and close when cooled or is it the other way round. Hopefully it's the other way round ie close when hot and open when cold.
 
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proview1122

Ajax123 said:
£21 for CSA is a super price. Understand the need for ditra now you've mentioned instability. Just as a belt and braces do you ow if the cracks open when heated and close when cooled or is it the other way round. Hopefully it's the other way round ie close when hot and open when cold.
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yes exactally, open when cold closed when warm. Main one is across a door way, the other half way along wall about 1m long
 
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The D

Ajax123 said:
Every day is a school day deano... :)
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I just called the tech line for schluter and they do not advise the use of gypsum adhesives to stick ditra mat to gypsum screeds as they have not tested it and there for can not recommend it there recommendation was to use Ardex primer and Ardex adhesive. :smilewinkgrin:
 
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proview1122

deanotile said:
I just called the tech line for schluter and they do not advise the use of to stick ditra mat to gypum screeds as they have not tested it and there for can not recommend it there recommendation was to use Ardex primer and Ardex adhesive. :smilewinkgrin:
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well I was just about to do the order for £1600 worth of gear to do the job now you've made me think / worry / pull hair out again. I was just getting my head round the problem and thought it was solved.

If I was not using ditra then the gypsum adhesive would be the way to go and it would stick well to the screed and tiles

I think Schlüter are just covering their arse and have not tested long term compatibility with gypsum addy
what todo what todo

its now wonder no one feels confident with this screed
 
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proview1122

deanotile said:
Tel:
+ 44 (0) 1530 813396 give the tech line a call its the best way :thumbsup:
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just spoke to them they don't as you say recommend using gypsum addy but did agree that they had not tested its use they could only recommend what they know is ok ardex primer and ardex addy

interestingly I rang granfix re their csa addy and their technical bloke also did not recommend csa to stick matting down and to use primmer and cement addy

really am loosing hair now
 
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Ajax123

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garythetiler said:
Gypsum adhesives arent covered in the british standards yet call mapei technical or bal technical or ardex or any of the leading brands and follow their specification, at least if any thing goes wrong you have shown due dilligence and have a specification form the adhesive company good luck with the job
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That depends on how you define cement.
 
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bugs183

Don't follow Lilley's website prices, phone them up, Schluter are very strict about how people advertise prices on the net, i'm certain you'd have got it cheaper.
As for the Anhydrite screed situation with Ditra, you can't win.
Gypsum adhesives stick to gypsum, but not well to Porcelain or Ditra. Cement based adhesive stick well to concrete, Ditra and Porcelain, but its a huge risk following what Mapei and Bal say.
If it goes wrong what do they pay for, the cost of the adhesive, or the cost of moving furniture, pulling up tiles, cleaning the floor, then retiling the whole floor again, unlikely.
Not worth the risk, and it is a big risk to take.
 
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Ajax123

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It is not for schluter, dural,or anyone else to say whether a particular adhesive does or does not work unless they have tested it themselves. They do not guarantee the performance of the adhesive. They make the uncoupling membrane and that is it. That is the only bit they are responsible for. If they make a commercial decision to test and guarantee a particular material then fine but that does NOT mean that other materials do not work. The best they can do is to comment that they have not tested it. It is not a case that they do not recomend gypsum adhesives it is a case that they CANNOT Recomend. There is a big difference. This non recomendation does not mean it does not work. They cannot say it does ot work because they do not know.

It is for the adhesive manufacturer to say what his adhesive will and will not stick to. It is for them to guarantee the performance of their adhesive. Whether it contains cement, gypsum or flipping porridge oats makes not difference to schluter or bal or ardex whatsoever unless they make the adhesive. It is for the adhesive manufacturer to test it if they see fit. They don't even have to do this to make a recomendation about the material they make. The adhesive manufacturers make the adhesives not schluter.
 
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