Tiling onto new plaster

[John the tile]

i dont think i said i wanted to change anthing, the rules are good enough for me also as well as most other people.

I mereley would like to know the science behind it.

As i said in my previious post tiling onto a skim which is onto a wet backing coat then this takes weeks to dry out - the backing coat that is, so fair enough this may have an adverse effect on the tiling if not fully dried out properly.

as for the "skim drying forward"? I think youve made a mistake there. if thats the case your entering into a whole new world of problems. e.g skim falling off the wall totally not just the tiles:incazzato:

I think the 4 week rule must be a worst case scenario e.g skim onto wet backing coat. therfore skim onto board at lot less than 4 weeks.

?

 

[Andy Tiler]

I think this will answer any of your questions



tiles.org.uk/help/answer-gypsum.shtml

 

[John the tile]

sound - thats one for the bookmarks.



it doesnt say anything about tiling onto skim which is onto boards. or am i blind.

also when it keeps refering to concrete backgrounds what does it mean?

 

[Andy Tiler]

golddigger Phone british gypsum 08705456123 this is the manufacturer of the skim.:mad2:

 

[lucius]

Yes Andy apreciate what they are saying but ive worked on hundeds of sites in differant countries over the years and i cant think of any of these recomendations being adhered to especialy nowadays where the site manager is under pressure to stick to unrealistic targets or lose his job.
Lucius.

 

[mike111]

Ive just done a lot of tiling for a customer,kitchen floor,splash backs,downstairs toilet,and conservatory,as i was tiling the conservatory with ufh the customer had a well known company come in and totally refit and tile the bathroom, They stripped out old suite first day, 2nd day stripped tiles off two plasterboard walls and left tiles on the other two walls and fitted new suite, 3rd day where they stripped tiles off the plasterboard walls and took some of the board with the tiles they just skimmed over this , two walls about 3m2 each , 4th day tiled over tiles and 5th day tiled the skimmed plasterboard walls, so they left to dry one day only before tiling, this was not the way i would of done things but has anyone else seen this type of work before:shocked3:

 

[White Room]

Float and set was 6 weeks thats why dry linning was used for fast track work, skimming, can't see anybody waiting 4 weeks to be honest. I was on a large refurb at a girls school during the school holidays, the tilers had no time to dwell on 4 weeks drying time for skim work, if it looked dry they tiled

 

[Rob Z]

It seems like everything here is on the fast-track. Now I don't know what they should call the new fast-track, because the old regular way is now the speeded up way, and that is considered normal. :mad2:

 

[Colour Republic]

I would and have tiled over skim (single not double coat) after 3-4 days if that is the only new coat of plaster and I know it's only a couple of mm thick, If the walls have been bonded then finished I would wait anything from 2-4 weeks depending on thickness and if the whole wall was bonded or just patched up

Where some of you are quoting 4 weeks, this applies to plaster with an undercoat

From TTA
10. Gypsum plaster must be thoroughly dry before tiling. New plasterwork consisting of undercoat and finish coat should have been completed at least 4 weeks before tiling is commenced. Tiles should never be fixed to plaster which is not dry throughout. Where drying is assisted by space heating or dehumidifying, care should be taken to ensure that the plaster is not just dry at the surface. The heater or dehumidifier must not be directed at the plasterwork.

 

[mikethetile]

thanks cr

i dont take chances, if four weeks is the reccomendation ,then thats what i do