tanking

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ruddez

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would anybody recommend using sbr/cement slurry to tank a 8mx2.5m living room wall living room wall which is below road level and is constructed of stone,would you render in 2 coats sand/cement with waterproofer and then put the sbr mix on in 2 or 3 coats,would it then be advisable to dot and dab plasterboards on after a few days,any advice please
 
I would give it a base coat of modified render say 4 or 5 to 1 sand cement with a 4;1 gauging mix of water and sbr, this will even out the wall to allow your slurry to be applied neatly and evenly on the second coat whilst still wet/tacky i would then apply a further render coat and finish as required, if there is no major hydrostatic pressure then you could possibly dot mr boards over the slurry/tanking.
another option would be to install a membrane (ie oldroyed etc)and finish as required
 
don't forget to carry out the usual treatments prior to render ie salt neutraliser, water and sbr at 9;1 wash down prior and after each coat of render etc
 
You could look at a Newton system ,then stud wall in front ,metal or wood .that way you can insulate between the studs as you are below ground level .
 
ruddez said:
would anybody recommend using sbr/cement slurry to tank a 8mx2.5m living room wall living room wall which is below road level and is constructed of stone,would you render in 2 coats sand/cement with waterproofer and then put the sbr mix on in 2 or 3 coats,would it then be advisable to dot and dab plasterboards on after a few days,any advice please
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Hi Ruddez,

Can you expalin the layout of the room in more detail.Is it just the 1 wall that is below ground level, or is the whole room below ground level. Is it a basement/ part basement. Just be mindful that if you stop water ingress on one wall, it will find its way to another or into the floor.
 
to mark ross,half the house is below road level but only the one living room wall is against it,it has been tanked and rendered and skimmed20 yrs ago,the damp is only at the bottom of the wall so i am now wondering if we get the paint off the wall and then tank over the existing wall as the upper part of the wall is dry the living room wall is 2.5m high and is sound,the two side walls are dry
 
ruddez said:
to mark ross,half the house is below road level but only the one living room wall is against it,it has been tanked and rendered and skimmed20 yrs ago,the damp is only at the bottom of the wall so i am now wondering if we get the paint off the wall and then tank over the existing wall as the upper part of the wall is dry the living room wall is 2.5m high and is sound,the two side walls are dry
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1. The floor wall junction is there any opportunity for moisture to migrate through the base of the living room wall?

2. How do you know that it is not condensation forming on the lowest parts of the wall? If it is it might be worthwhile improving the thermal efficiency by using some form of insulation.
 
sliemasteve said:
1. The floor wall junction is there any opportunity for moisture to migrate through the base of the living room wall?

2. How do you know that it is not condensation forming on the lowest parts of the wall? If it is it might be worthwhile improving the thermal efficiency by using some form of insulation.
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i assumed that all these issues had been eliminated or addressed and that he just wanted a tanking option using a slurry, which is what he has had, there are many options available to him but this is the question he wanted an answer to, without seeing the job or getting a full breakdown of what problems and scenarios he has discounted as irrelevant there is little point in throwing further questions into the equation without the full facts, we will be here for weeks going over the same stuff that we have covered in many threads previous to this one. all he has to do is do a search and all the relative info will be made available to him. No disrespect intended to any one just trying to save us all a bit of time and reduce repetitive threads. and the mods a load of work looking at threads that have the same questions and answers over and over again.

Again no disrespect intended most have very valid opinions and arguments and give sound advice.

Have a nice day
 
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