Browse Forums General Discussion 1 Aug 23, 2019 12:31 am Hi there, I am having issues with internal walls in a space which I am currently setting up as a barbershop. The space is inside a old building which suffers from water leaks (I can’t do anything to stop the leaks, old heritage building). Walls/Ceiling is all brick. After recently leasing this space, I decided to render over the existing water damaged render. The new render is now ( few months later) full of water stains. I am now contemplating on wether I should attempt to get it rendered again, but this time get it waterproofed first. I have got my hands on some MAPEI waterproofing material. I will be applying two thick coats of waterproofing before getting the walls rendered again. Does anyone have any suggestions or advice? I don’t have many other options other than rendering the walls/ceilings as the walls are curved/Dome and would be tough to cover in any other way. I will attach photos for reference, thank you in advance. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ 1 comment ⋅ Pin to Ideaboard ⋅ Like ⋅ 1 comment ⋅ Pin to Ideaboard ⋅ Like ⋅ 1 comment ⋅ Pin to Ideaboard ⋅ Like ⋅ 1 comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Rendering/water stains 2Aug 23, 2019 11:23 am Hi, The waterproofing will trap the moisture in the wall. Over time this will blister/bubble so any render/coating on top of it will show signs of that also. Most likely occurs in a few years. IMO patch render as you have done and then use a cement/oxide wash to color and finish walls to a satisfactory level. Re: Rendering/water stains 3Dec 21, 2019 7:33 am I would be doing the waterproofing first, on top of that I would be looking at the colours of the existing stains and choosing a camouflage type paint scheme so if it leaks in the future it won't show but be part of the atmosphere in the barber shop. Re: Rendering/water stains 4Dec 21, 2019 11:26 am Some of the above or what you have suggested may or may not work for more than a few months before the problem surfaces again. It is a bit like painting over rust in a car. It'll look good for a while but will come back eventually. The only real way to stop it is to stop the leaks even though that seems to be out of your hands. The only other way I have seen something like this fixed is by using a waterproofing additive as part of the render not a separate waterproofing layer. This was done on an apartment wall facing the ocean about twenty years ago suffering salt incursion and recently I asked the owners if I could have a look. It still looked pretty good and they said there weren't any problems with that wall over the years. I can't recall what the additive was though. YMMV as they say. Stewie Hi everyone, Have just put a shower in the laundry and after only using it 2-3 times have noticed staining on the grout. The tiles were glued onto a concrete wall after… 0 3762 Is it possible to render an old corrugated iron shed.I have heard that it can be done if it is covered with chicken wire first.Not sure of the ratio of the render mix and… 0 3361 |