Cavity wall recommendations near Edinburgh

[CharlieB]

Hp installation has made it clear that our single -storey 80s extension has no cavity wall insulation.

Before I get lost on Google can anyone recommend either a local contractor or a national contractor who are nice and straightforward?

Also, which is the right / wrong material for it? I remember dampness horror stories but I can’t remember the details. (We’re pretty exposed here so I doubt damp would be a problem.)

Thanks. C

[CharlieB]

No one?

How about has anyone had a bad experience? Ie any contractors to avoid?

C

[Joeboy]

I read up on CWI then did my own insulation while allowing airflow. I'd really like CWI to be a silver bullet but what with the damp issues, cowboyitis and HUGE mortgage problems i think this is too hot a potato to just chuck advice at willy nilly.

I'll throw this out for shooting down. Air circulation in the living space and within the walls is key to the long term health of a building and its inhabitants. CWI can seriously mess with the balance. Have at it!

[resybaby]

My place a 1970's blockrender/block house has CWI, you can see it creeping out the top of the walls in the loft and the injection holes. Its like an offwhite foamy type of stuff that crumbles to dust when you rub it between your fingers. No idea at all what its made from but looks like some sort of injected foam.

Anyway, im frontline coastal on the North Cornwall coast, so very wet and very windy, but ive not noticed anything detrimental for the CWI i have. Not a single sign of damp or mould spores anywhere during the last 12 years.

Not sure if thats anyuse, i suppose a lot of the issues can be down to the installers.