General thoughts on cavity wall insulation

[SilverShadow]

Hi again, folks

 

Firstly, apologies if this is already well trodden paths. I'm sure something as generic as this probably gets resurrected more times than a boybands career! 😁

 

However, if not then please read on...

 

We'd be looking to have our home's cavity walls insulated, and after your guys high level advice/experiences. I have some basic questions, but please feel free to add anything you feel of value 👍

 

The house walls are outer brick/inner block. I'm not sure of the cavity gap/condition, but for the purposes of this convo: lets assume it's suitable for any approach....

 

My questions are:

• What is your preferred insulation material(s)? - i've heard good things about EPS and foam (tho both have pros and cons). I'm leaning towards EPS (due to cost), but happy to find out more
• What to look for with companies providing the service - plenty have reasonable reviews on Checkatrade/etc, but some are likely better than others. So are there any accreditations/memberships to really look out for?
• Quoting for cost - dumb question (my specialty 🤪), but costs i've read online are by m2. I assume the reputable companies factor in window/doors into their quote, and don't just crudely estimate based on rough wall dimension? (i'm not sure if this is a good yardstick to measure if estimates are realistic tho? 🤔)
• Guarantees - am i right in thinking all work guarantees (some i've seen are 25 yrs) should be insurance backed?
• GBIS - does anyone know if GBIS companies are any better/worse than anyone else? I've occasionally seen online non-funded jobs (eg: private) are sometimes completed badly
• Anything else - eg: building regs signoff, that may be required?

 

Many thanks as always for your sage suggestions

Shadow