doing 400m2 tiling onto gyvlon screed, this is the addy we will be using
http://www.creative-impressions.com/...20Adhesive.pdf

that addy does not look to great . who maks it?? 25 kg as well ?? prob rebaged import??

have seen this before.This adhesive is recommended ( I think ) by some anhydrirte manufacturers. Ensure you use primer as specified.
In theory you should have less problems because it is gypsum based.
i nearly used on one job,but went for Bal option.
40 sq m,anhydrite over wet UFH.
Gave customer my 25 year Bal backed guarantee.

GBTA is perfect for gyvlon screeds...it is around £26 a bag and you can get the primer there as well if needed...

You do need to make sure the screed is clean and sanded to remove any surface contamination if the LL version was used.. this needs to be confirmed as the other versions will have a laitence on the surface of about 0.5mm and this needs to be removed before priming/tiling can commence.

You do need to find out the installation date and make sure the screed is dry...

A hair hygrometer will tell you the percentage of moisture within the screed and this needs to be as best to 0.5%..

But yes GBTA is the one if you want to go the gypsum adhesive route.

Gettin there Dave......gettin there.

Paul.....how on earth can you judge if the addy looks "not great" from a picture????

I have seen no failures on anhydrite where this and one other gypsum addy have been used. Additionally where in France we recomend it it has decimated the number of tile delam issues we see.

Not saying other systems don't work.....clearly if everything is done perfectly they do. Simple fact is though the more compatibility there is between products the fewer failures you will see.

The gyspum based addy's can generally be used whilst the screed is still relatively wet (85% RH)

You've got 400sqm to do - they advise only mixing 2sqm per batch and fixing with a 3mm bed screed.
Sounds interesting - hope the floor is flat!

That was the reason I did not use in the end up !

the addy arrived on site today wjill start laying monday , we all so got primer from them , have sanded and primed 2 floors ready for monday.
i noticed on the bag it says only mix enough for 2 m2 surly this is aimed at the diy,tilers , i hope so

Originally Posted by timeless john

You've got 400sqm to do - they advise only mixing 2sqm per batch and fixing with a 3mm bed screed.
Sounds interesting - hope the floor is flat!

the floors are very flat ,as to mixing 2sqm per batch surly thats not right , i know it says that , but thought it might be for diy tilers

Originally Posted by Ajax123

Gettin there Dave......gettin there.

Paul.....how on earth can you judge if the addy looks "not great" from a picture????

I have seen no failures on anhydrite where this and one other gypsum addy have been used. Additionally where in France we recomend it it has decimated the number of tile delam issues we see.

Not saying other systems don't work.....clearly if everything is done perfectly they do. Simple fact is though the more compatibility there is between products the fewer failures you will see.

The gyspum based addy's can generally be used whilst the screed is still relatively wet (85% RH)

we have just had the floors tested 85% rh is the reading we got

so do i if you have 400m2

Originally Posted by gooner59

so do i if you have 400m2

its 400m2 in ten different rooms it will be going down quicker than 2sqm mixes. or its going back

Originally Posted by nybor62

its 400m2 in ten different rooms it will be going down quicker than 2sqm mixes. or its going back

When are you going to start tiling?

Originally Posted by Ajax123

When are you going to start tiling?

monday ajax will give another coat of primer first

could be interesting why prime twice

Advice direct from Lafarge...
http://www.gyvlon.co.uk/Floor%20Cove...Guidelines.pdf

Originally Posted by nybor62

monday ajax will give another coat of primer first

Bit cheeky I know but any chance I could come up and take some pics? Would be interested in putting a case study together for the website.

we were instructed by the supplier , why dont you think it needs it

Originally Posted by nybor62

we were instructed by the supplier , why dont you think it needs it

Yes! Stick with the suppliers instructions.

Originally Posted by nybor62

we were instructed by the supplier , why dont you think it needs it

if the supplier say so do it just sounds weird

(supplier or manufacture)

Originally Posted by Ajax123

Bit cheeky I know but any chance I could come up and take some pics? Would be interested in putting a case study together for the website.

i dont see why not the job is in grimsby, bradley . for clark construction

im the subby for b.w shrimpton ltd

Originally Posted by nybor62

i dont see why not the job is in grimsby, bradley . for clark construction

im the subby for b.w shrimpton ltd

Oh I know all about that one. Spoke to Baz the other day about it. I put him in touch with Creative. I guess you can probably blame me in that case. Will pop in sometime either Monday or Tuesday and try not to make a nuicance of myself.

Originally Posted by Ajax123

Oh I know all about that one. Spoke to Baz the other day about it. I put him in touch with Creative. I guess you can probably blame me in that case. Will pop in sometime either Monday or Tuesday and try not to make a nuicance of myself.

no probs look forward to it ,ill pm you

http://www.creative-impressions.com/...20Adhesive.pdf

interesting read what ever amount of adh you mix you cant re temper (re mix to make workable)

Originally Posted by jay

http://www.creative-impressions.com/...20Adhesive.pdf

interesting read what ever amount of adh you mix you cant re temper (re mix to make workable)

I guess that is becaue it is gypsum so once it starts to set and you re mix it (bit like plaster) it will then go off like stink. I assume that is why they said 2m2 at a time - It would probably take the average DIY tiler 20 or 30 minutes to lay this with smallish tiles.

I know Sab their new tech manager is awaiting new and more descriptive brochures for the gear.

Originally Posted by Ajax123

I guess that is becaue it is gypsum so once it starts to set and you re mix it (bit like plaster) it will then go off like stink. I assume that is why they said 2m2 at a time - It would probably take the average DIY tiler 20 or 30 minutes to lay this with smallish tiles.

I know Sab their new tech manager is awaiting new and more descriptive brochures for the gear.

sounds like it might be a pain to use may have to clean after every mix (adh bucket) as to not shorten life of next mix

Originally Posted by jay

http://www.creative-impressions.com/...20Adhesive.pdf

interesting read what ever amount of adh you mix you cant re temper (re mix to make workable)

yeah ive read it jay thanx

let us know how it goes

Originally Posted by jay

sounds like it might be a pain to use may have to clean after every mix (adh bucket) as to not shorten life of next mix

I know quite a few tilers who have used it and general comment is that it is nice gear to use. I know at least 2 guys who have returned existing addy on site in favour of this. Don't knock it till you've tried it says I

i will jay