Water proofer in first ie scratch coat on solid concrete block (7 newton) or not

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johniosaif

johniosaif

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Hi, too much reading has probably confused me, I am rendering a new house, the outside is solid concrete block, I have scudded it for additional key, monday I will scratch some of it. I am undecided as to put waterproofer in the scratch coat, because of the drying time and the short days and possibility of bad weather. There are some large areas, the scaffold is awkward, three lifts on most of it so its not going to be a bang bang job, slow to load out with materials etc, so I am thinking that maybe waterproofer would be the best option.. Thoughts etc? Thanks
 
it all depends on the size of your gang. we like to have a gang of 4 on rendering large areas, so then the rendering can be broken up into different stages.
 
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I defo would without any doubt,would rather get the halogens on and work late,rather than chasing it and it looking patchy,IMO.
 
malc said:
it all depends on the size of your gang. we like to have a gang of 4 on rendering large areas, so then the rendering can be broken up into different .
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A 2 and one gang, with one spread needing to help the labourer, a very tight site, need very slim plasterers, 3 board wide on scaffold at best and the scaffold is designed for god knows who but its not for us, may have to get it changed after the scratch..
 
johniosaif said:
A 2 and one gang, with one spread needing to help the labourer, a very tight site, need very slim plasterers, 3 board wide on scaffold at best and the scaffold is designed for god knows who but its not for us, may have to get it changed after the scratch..
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I've been there John,so bloody annoying.
 
johniosaif said:
its in SW16 london, hopefully the render work wont be in the news. No ,been on the trowel since 87 and I hate a job not been right..
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Can you not re-jig the scaffold yourself a little bit,I know you shouldn't have to but we re plasterers the scum of the building trade lol
 
superspread said:
Can you not re-jig the scaffold yourself a little bit,I know you shouldn't have to but we re plasterers the scum of the building trade lol
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Re jigging done by bricklayers already for their benefit, it needs taking down and been put up again in large sections, the main supports are less than an inch from the walls in places, the finish would look cat, the scaffold is high and narrow,some scaffold firms turned down the job because of the small space it is sited in, HSE would have a field day on it..
 
Make a call on the qt to the Hse before you start if you are not happy with it . i hope you have done a risk assesment's etc.Remember health and safety starts with you .
 
beader said:
Make a call on the qt to the Hse before you start if you are not happy with it . i hope you have done a risk assesment's etc.Remember health and safety starts with you .
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It is safe. I would not use it otherwise, spent half a day collecting trip hazards lying about, the builder is an old client, I have done in the region of 500k of work for him in the last fifteen yrs, it is just a site with no room , the house occupies every square inch except for 900mm walkway..
 
beader said:
Make your mind up you said in your last post that HSE would have a field day with it.
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Less so now that I sorted some issues,the main problem is space, HSe will not be able to create space, the ideal site is rare especially with the smaller builders..We just have to be careful and bear everything in mind as we proceed..
 
spunky said:
John what do you do in the summer with no waterproofed in the scratch?
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Obviously the summer has faster drying times, longer days ,better light etc and the weather is more predictable , so yes I use water proof on concrete and old brickwork
 
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