FIRSTLY.. DRY lining doesnt solve the problem, all you are doing is erecting another element of building fabric to keep out the damp... sometimes it works, other times it doesnt.
Secondly, i would always be slow to advise any product that isnt certified to work under irish conditions.. ie the IAB cert.....
did your surveyor attempt to define where and why the damp is coming in ??.
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the above company have a long and reputable history in this market in ireland, perhaps contact them to get their advise.
I also post on construct ireland, so i know you have this issue up there as well. some of the posters there are very knowledgeable but do come from a certian initial bias, you need to remember that.
There are a few solutions to rising damp..... im not sure about the dutch one to be honest. you can inject a chemical damp proof course but you need to check that your wall can take it. Is it a 310 cavity wall with 50mm polystyrene insulation??
Another solution is an expensive electro-osmosis damp proof course. This website explains it....
http://www.ultimatehandyman.co.uk/ELECTRICAL_DAMP_PROOF_COURSE.htm
i dont know of any irish company that does it, but it is recommeded by the dept of environment conservation guidelines....
http://www.environ.ie/en/Publications/Heritage/ArchitecturalHeritage/FileDownLoad,2235,en.pdf
either this system or the injection one would suit yours... dont dry-line, its a bad, cheap option.
external insulation thats being advised elsewhere is all ok in theory but you need to remember the issues other than construction, ie will planning be required for a change of facade finish? what effect will it have on soffits, barges? etc.
I would definately incorporate a HRV system.. .dont drill holes in the walls...
i appreciate all these systems are the expensive ones, and theres no such thing as an endless budget, but the more time you put into planning this the better.....
Edit... ive just realised at no point did you say you have a rising damp problem, so most of what ive said above is useless to you... but so is that dutch system!!...
Your new HRV system will solve your condensation problem..... just remove your wall finishes to see exactly the extent of damage....