Sand and cement or dot and dab? HELP

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Kev80

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Hi can someone please help me? I currently have a bathroom which is stripped back to the bare brick work and is single
skin walls. Im no expert on plastering but ive had three plasterers come round to quote and advise on my job.
The problem i have and is confusing me is that all three of these plasterers have said different things!!
1st plasterer said dot and dab and skim
2nd plasterer said a two coat sand and cement and a skim
3rd plasterer said one coat of sand and cement and skim.
The 2 and 3rd plasterers both said you can dot and dab but they both said a float and set method but they both said different
ways of doing that!!

Please can someone who knows what they are talking about explain to me the right way then i would know who to use.

like i said the room is totally back to brick(red brick)
 
If any of the single skin walls are external, avoid the dot & dab and likewise if external 2 coat s&c with a waterproofer in the scratch coat. If you have the space it would be better to batten and insulate behind the boards.
 
I prefer plasterer number 2 method of two coat s/c and skim. Plasterer 3 of one coat s/c and skim (for me personally) not quite right should always be two coats of s/c but am sure others will beg to differ? As for dot and dab? Its OK but I wouldn't if it was my house as never been a fan of that method but that's just my opinion I'm not saying its wrong or anything. Plus there's the price issue and first impressions to go on etc?? Hope this helps? Best of luck. Or depending where you are? Get a spread from the forum to come round and help? Good lads on here :RpS_thumbup:
 
Welcome along @Kev80, if the bathroom has external walls I would opt to add some insulation to the room , why not post the job on here? Like marshy said, there's a lot of experienced plasterers on here. Best of luck :RpS_thumbsup:
 
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If your planning on tiling the s&c will take longer to dry but the best method but non I would say are wrong but this is best
 
2 coat s&cement and skim is your best bet, but To be fair all the new builds we do are m/f partion stud internal walls, and dot dab and skim on external walls, its as good a system as any if implemented properly its more about making sure no water penatrates back to the plaster. As gypsum isnt waterproof.
 
thanks for the help guys. We cant stud it out due room size issues and we wouldnt be able to fit bathroom suit in.
Plasterer number two was really expensive and made it sound a massive job. He said he would 1st come one day put a scratch coat on leave for a day or two then come again put another coat on leave again for a week then he said he would skim it. All for a small room?! The 1st plasterer who wanted to dot and dab said it would only take two days and cost so much less?

It dont bother me the cost but i just want it done the right way . What would be the correct process float and set?
 
@Kev80 whereabouts are you?? One of the lads off the forum will put you on the right path who is local to you as without seeing the job all we can do is speculate all day ( I put "speculate" right?) :RpS_biggrin:
 
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go with plasterer no2 , the guy who wants to dot it is not trying to save you time or money he probably cant render thats all
 
i would have offered you both them options nothing wrong with either its just down to your preference.
any pics of the room?
 
Personally I prefer no3 option,can't see what an extra scratch coat is gonna make.if he's thinking damp probs or weather ingress on a single skin , 2/3/4 coats of s/c won't keep it out just prolong the inevitable.
 
You can still have your bathroom up and running while the render dries , all you have to do is ask for plumber if he take off the toilet cistern before tiling (if you are ) , like i said go with no2 he knows his stuff :RpS_thumbup:
 
superspread said:
Personally I prefer no3 option,can't see what an extra scratch coat is gonna make.if he's thinking damp probs or weather ingress on a single skin , 2/3/4 coats of s/c won't keep it out just prolong the inevitable.
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I always two coat as the first (as we all know) is to help even out suction and provide a key for the second coat and to help build out any problem areas?
 
superspread said:
Personally I prefer no3 option,can't see what an extra scratch coat is gonna make.if he's thinking damp probs or weather ingress on a single skin , 2/3/4 coats of s/c won't keep it out just prolong the inevitable.
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I would say the stratch coat would cut down the risk of shinkage cracking adding strength to the top coat same method and principle as outside render ?
 
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church said:
I would say the stratch coat would cut down the risk of shinkage cracking adding strength to the to coat same method and principle as outside render ?
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Indeed but if we are not careful we'l be telling each other how to suck eggs lol. This is all stuff we should know from our days as an apprentice :RpS_thumbup:
 
church said:
I would say the stratch coat would cut down the risk of shinkage cracking adding strength to the top coat same method and principle as outside render ?
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That wasn't a dig at you or anything pal, we should all know this basic stuff and am supposed at some peoples methods at times
 
I know all that church/ marshy I've been plastering since I was 17 nearly 49 now ,(said very friendly):RpS_biggrin:
 
Marshy said:
That wasn't a dig at you or anything pal, we should all know this basic stuff and am supposed at some peoples methods at times
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No probs Marshy :RpS_wink:, i see it as just conversation thats all , spose we all do things different , imo i would do it as no2 spread said , i think its the best method for that bathroom , i wouldnt dab on single skin and the one render coat runs the risk of strinkage cracking again imo
 
superspread said:
I know all that church/ marshy I've been plastering since I was 17 nearly 49 now ,(said very friendly):RpS_biggrin:
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But thats what this forum is for :RpS_unsure: all get on each others nerves , go off topic and confuse the s h ite out the oringal poster ?
 
church said:
No probs Marshy :RpS_wink:, i see it as just conversation thats all , spose we all do things different , imo i would do it as no2 spread said , i think its the best method for that bathroom , i wouldnt dab on single skin and the one render coat runs the risk of strinkage cracking again imo
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I'll drink to that! No hang on bit early yet.......or is it?? :RpS_laugh:
 
Its bit like a version of Blind Date ?? Come on are Kev tell us who you gonna for for kid?? Will it be plasterer number 1 number 2 or number 3 your gonna have a lorra lorra fun!! :RpS_laugh:
 
phhhhhh all this plastering malarkey!!!! just tile straight onto bricks!!! will look great from my house!!!!:RpS_thumbsup:
 
I would say number 2, or if the customer wanted dry-lining I would still put a scratch coat of sand & cement with plenty water-proofer in it first. I wouldn't ever dab straight onto an old wall, and certainly not a single skin wall. And that method will give you slightly warmer walls - only very slightly though, it's still gonna be a cold room:RpS_thumbup:
 
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