Mortar beds on walls and floors?

[Spud]

Ho Rob thats the point ime making a float coat laid flat and plumb over the scratch coat and then tiles laid in addy to me seems quicker than the trad method on an area that big but i may be wrong.If the blocks are concrete or clinker they dont need anything on them just a wetting down before scratching other type of blocks may need SBR before scratching.
Lucius

you are not wrong lucius, rendering out a second coat would be quicker than the thick bed method i have used here , if you render out the second coat you can back spread the tiles with cement slurry and fix them straight on to the float coat or wait for the rendering to dry out then fix with addy ,i find the thick bed method easier personally as i am not great at rendering and the plasterers on the job would probably throw a fit if he caught me nicking his work lol

 

[Rob Z]

Hi Gary,

Now that I think of your description of what you are doing, I realize it's the same thing that we do with the artificial stone products....we float a scratch coat, let that set up, then back butter individual rocks with mortar and fresh them into place onto the scratch coat. I never thought about doing that with tile.

Thanks for posting the photos.

 

[Rob Z]

Gary, I found a picture of what I mentioned in the last post. Are these types of products sold and installed in the UK? The scratch coat is dried, and we use type S brick mortar to bond the rocks to the wall.

 

[DHTiling]

How the hell do you grout those beggars Rob...:smilewinkgrin:..

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[Rob Z]

Grout bag!

 

[lucius]

Their is a lot of this type of work in Spain with various types of stone, what spec is type S morter Rob?
Lucius

 

[Rob Z]

Hi Lucias,

Here is an article with a bit of info about the various types of mortars for blockwork and brickwork:



Mortar: What Type Do You Need? - Fine Homebuilding Article

 

[lucius]

Thanks Rob
Lucius

 

[tfs]

I learnt a little about sand and opc screed for floors at college when laying quarry tile. Presonally I enjoyed this. Can anyone tell me what the sawdust is used for exactly?

I remember my tutor talking about some architects requesting in the spec that sawdust had to be thrown over the tiles when laid to seal the joints etc and keeping the colour better etc

any comments regarding this would be appreciated as I wasnt paying attention at the time and cant remember exactly what he was saying😳

 

[lucius]

Quarry tiles especialy when i used to lay them in the 70s were used mainly in washrooms etc where a hard impervious surface was needed their was not much else available in them days for that price they were laid in sand & cement and were grouted in a cement slurry which you then chucked sawdust over and pushed it about to clean all the residue up it worked perfectly the Spanish still use this method but use a dried grass i think its called Esparreto instead of sawdust but works the same a soft abrasive but soaks up as well.
Lucius