Damp problems – Tanking?

traineepensioner

Hi,

I have damp in the external walls of 2 rooms of my stone cottage. The cottage is over 200 years old and is a solid wall construction of random/dressed stone and rubble (plastered internally). The cottage fronts the highway and the internal floors are at least 600mm below the external pavement. A mortgage survey brought up the damp issue and a local damp proofing firm drilled holes all over the place, injected silicon and replastered .....It was all the rage in the 1990’s. The damp returned of course, despite the 30 year guarantee.:(

I’m going to be decorating these rooms shortly and would like to cure the damp once and for all. I understand that the walls will require tanking as I’m unable to lower the external floor level or raise the internal floor level.
Has anyone done something similar themselves or is this just a job for the experts? I was thinking of removing the plaster to a height of around 1.5 metres, applying a thin render of cement to fill any holes and level the rubble and then applying K23 tanking slurry (http://www.kabuildingproducts.co.uk/page_2350337.htm ) before getting someone in to replaster.

Does anyone know of any cost effective alternatives? Any pitfalls or advice regarding products or method?

Many thanks,

traineepensioner

Shamelessly bumping this :embarasse ....

Anyone had any tanking/damp proofing done recently?

Any professionals willing to advise?

Thanks again.

....hoping to get this done next month

dampdaveski

Moneyman,
In all of your 5 posts you have slated the PCA and recommended Peter Ward EVERYTIME.
Why don't you stop spamming peoples threads who are requesting assistance with your own bitter twisted little agenda, just run along sunshine!
Anyone would think you had a personal vendetta against the PCA........

Everyone else,
I apologise for the above but that kind of blatant spamming really irritates me, particularly when I know it to be untrue

dampdaveski

TP,
It can be a specialised job as the attention to detail has to be very good.
Remembering that it is always difficult to give accurate advice via a forum.
However I suspect you have a couple of options

Option1
Use a cement based tanking system though you will have to consider how you will get a waterproof seal to your existing floors.
This type of system in your situation could be more prone to condensation issues as a tanked wall below ground is going to be colder and will attract more condensation potentially

Option 2
Use a cavity membrane system, more information is available on these systems http://www.deltamembranes.com/ http://www.safeguardeurope.com/ there are plenty more suppliers out there, these are just a sample. These are known as Type C systems in the relevant British standard BS8102:2009
Cement tanking systems are known as Type A systems.

If you're a very practical person with good building knowledge then you might be ok.
Alternatively if you have any more questions just let me know

Good Luck
DD:beer: