I think I will have to redo the tiling with the bagged adhesive. Because I tried to remove a tile today by hand and it came off without much force. It was tiles few days back.
I think that’s an extremely wise decision. Personally I would advise you take the lot down. The addy should scrape off but if stubborn, try soaking in water; it should soften as it (hopefully) won’t have fully cured. Don’t try sticking the wet tiles straight back on the wall though, let dry face down overnight.
Just wondering which type of bagged stuff I would need? and do I still apply it with a notched trowel? How much of the adhesive can I mix at one time? I mean do they dry quick or would it be ok for a day to use?
Generally you get what you pay for with this stuff; I always use BAL as I know their products;
http://www.bal-adhesives.co.uk/products
but equally good are Mapei, Webber, Ardex are some I know but there are others; steer well clear of cheapo DIY products sold by the major DIY sheds; B&Q sell Mapei but it’s not particularly cheap. If you use Topps for BAL go in scruffy, look like you know what you want & negotiate the price as, again, the standard retail price is a rip off; depends on local staff, sometimes it works but sometimes not. Use waterproof Flexible addy/grout an all boarded surfaces; you can use standard elsewhere but it rather depends how much you need in each area; sometimes it’s more cost effective to buy/use flexi all over.
Cement addy generally has a pot life of around 40 minutes but you should clean your bucket & tools well between each new batch or the old stuff will cause it to go off quicker. As your inexperienced, don’t mix up more than you can use in, say, 35 minutes which will give you enough time to clean everything down in between.
Trowel notch type/size depends on if it’s a wet or dry area & how flat your walls are but for your purposes, I would advise you stick to a solid bed round notch trowel - 20mm notches, 10mm deep, at 28mm centres. In dry areas you could drop the size of notches to save on addy but I think you would do best to stick with the same trowel; coverage from a 20kg bag in this case would be between 6-7 sq/m but I would plan for on 6. If you’ve got any Gypsum plaster or plasterboard surfaces you must prime them with an acrylic primer/sealer before tiling to avoid any reaction between the cement & gypsum.
Cement addy relies on chemical curing not evaporation (as tub mix) so you can grout after a few hours but I suggest you leave it overnight before. Don’t use the shower for at least 10 days.