Screeding question?

[R Montgomery]

Hi guys,
Just trying to figure things out.I'm used to standard floor prep being a cleavage membrane followed by a reinforced dry pack sand and cement screed.If it was a small floor I would lay the screed in the morning and if there wasn't any waterproofing,ufh etc I would tile in the afternoon on larger floors the next day.Yes on a green screed.On walls the same except using a wet lime mortar instead of the dry pack.Does this sound standard to anyone on here.I understand that there are now adhesives for going over substrates such as plywood but why?Tap it,it sounds wrong.
Can anyone help me out of the Twilight Zone I feel I have entered?

 

[DHTiling]

Hi monty..

You will find a lot of methods in the uk are vastly different to what you were used to in the usa..

You can fix to a fresh screed as you say ....slurry bonding is still done but does have its probs...especially efflorescence from the screed....if using a portland based mud deck...

 

[2Balls]

Modern building methods,Quicker setting times, Building Material companies bring out new products,to make new money so to speak!Time goes on and things change.:8:2Balls

 

[R Montgomery]

Thanks Dave,
I have a lot of new things to learn to deal with new situations.I will try to not always rebel against them.The one thing that I will rebel against is any dumming down or loss of quality in my trade.

 

[R Montgomery]

The sand is all river sand that goes through multiple washes so I have never had a problem with efflourescence coming up through the screed.Where does the sand here come from and how do they process it?Would I be stuck always using a membrane over the screed or are there other alternatives?

 

[White Room]

There different limes, Hydrated and Hydraulic and others. Hydrated lime is good for sand/lime/cement mixes. The Hydraulic NHL 3.5 is used for lime morter (no cement) for listed and lath application, believe me this is a whole different ball game. A sand/cement mix with fine sharp sand for rendering would suffice, no soft sand for rendering

 

[R Montgomery]

There different limes, Hydrated and Hydraulic and others. Hydrated lime is good for sand/lime/cement mixes. The Hydraulic NHL 3.5 is used for lime morter (no cement) for listed and lath application, believe me this is a whole different ball game. A sand/cement mix with fine sharp sand for rendering would suffice, no soft sand for rendering

Yea,I meant the hydrated lime,sand cement mix.Good to know that lime mortar has a different meaning here.The river sand comes in a couple of grades both fairly sharp.I never found soft sand in the states.Thanks Whitebeam.Feed me.I need to know.

 

[faithhealer]

this is all new to me, anyone got any web pages to read up on?