FAO PH Builders, advice required...
Discussion
Bit of advice if you would be so kind..
As you can see from the photographs, bits of sand/cement rendering have been coming away from the top right hand corner of my back wall, (The recent frost hasn't helped)... it's not really a problem because I have some industrial quality extension ladders, and can easily patch the area up myself in spring)
This seems to happen every two years or so...and always in the same place.
On the opposite side of the wall in the loft, it is bone dry with no sign of water ingress whatsoever.
I assume the answer is going to be trat the affected area with stabilising solution, but any further advice would be appreciated...
As you can see from the photographs, bits of sand/cement rendering have been coming away from the top right hand corner of my back wall, (The recent frost hasn't helped)... it's not really a problem because I have some industrial quality extension ladders, and can easily patch the area up myself in spring)
This seems to happen every two years or so...and always in the same place.
On the opposite side of the wall in the loft, it is bone dry with no sign of water ingress whatsoever.
I assume the answer is going to be trat the affected area with stabilising solution, but any further advice would be appreciated...
I'm not a builder, but a Surveyor with SOME experience of this problem. My opinion is the render probably isn't up to scratch and could be the wrong mix (patching will never last long). Sand/cement render in this application IMHO is HUGE maintencance problem (I hate it) Through colour single coat chemical renders are better IMO. There are several on the market and won't cost as much as you think to de-do.
Not quite nthe answer you were looking for, but my 10p worth all the same.
If you stick with the current render, a bit of paint wouldn't go a miss to give it an additional layer of protection. Make sure you use a good quality external grade masonry paint tho'
Not quite nthe answer you were looking for, but my 10p worth all the same.
If you stick with the current render, a bit of paint wouldn't go a miss to give it an additional layer of protection. Make sure you use a good quality external grade masonry paint tho'
Edited by sixpot on Thursday 13th January 11:56
sixpot said:
If you stick with the current render, a bit of paint wouldn't go a miss to give it an additional layer of protection. Make sure you use a good quality external grade masonry paint tho'
Thanks.
I painted the entire wall about two years ago with "Santex" exterior, which has a picture of a lighthouse on the cans, probably ready for another coat all over now anyway, when I have sorted this area out.
As I said, everywhere else is OK.
Spudler said:
Is that exposed blockwork we can see in the pic? Any idea of the thickness of the render?.
Yes, It certainly looks like breeze block from below... I have a very small piece of render that has fell off....around 6-9mm approx.....As I said, I suspect the frost hasn't helped...the last two winters have been really bad as you know.
If I scrape all the loose stuff off, before I re-patch and re-paint can anyone recommend anything to make the new render "adhere" to the blockwork and old stuff?
redeye said:
to make it stick use unibond PVA
is there any probs with the cement work on the verg above, could be water damage from above, check tiles allso ,thomsons stabilizer is v good stuff
No the verg is OK.is there any probs with the cement work on the verg above, could be water damage from above, check tiles allso ,thomsons stabilizer is v good stuff
I think unibond PVA could be the answer as you say....
It's not really a big issue, only a day or so's work.
If it happens in the same area each time then hack off the surrounding render. It might be a poorly alligned block that means the renders too thin in that area.
After you've hacked off the render, fix some s/s eml to the exposed brickwork and then re-render.
Alternatively, hack off the render, rack out the pointing by 10mm to provide a key (like lath and plaster) and then render.
Using a specialist proprietary render for exposed locations would be worth the extra cost.
After you've hacked off the render, fix some s/s eml to the exposed brickwork and then re-render.
Alternatively, hack off the render, rack out the pointing by 10mm to provide a key (like lath and plaster) and then render.
Using a specialist proprietary render for exposed locations would be worth the extra cost.
As posted above chop out the bad areas until you get to some solid render, then treat with a bonding agent.
Also get some SBR bonding additive ( Link for it) to add to the render should help it bond and also last a lot longer. HTH
ETA - you should be able to get the sbr bonding at most builders merchants or diy stores, link was just for the info.
Also get some SBR bonding additive ( Link for it) to add to the render should help it bond and also last a lot longer. HTH
ETA - you should be able to get the sbr bonding at most builders merchants or diy stores, link was just for the info.
Edited by Gav147 on Thursday 13th January 17:40
Wacky Racer said:
redeye said:
to make it stick use unibond PVA
is there any probs with the cement work on the verg above, could be water damage from above, check tiles allso ,thomsons stabilizer is v good stuff
No the verg is OK.is there any probs with the cement work on the verg above, could be water damage from above, check tiles allso ,thomsons stabilizer is v good stuff
I think unibond PVA could be the answer as you say....
It's not really a big issue, only a day or so's work.
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