Having cavity wall insulation done how will i know if it have be done right??????? got quote of lb250 told rep to hand over me his bottom...

got quote of lb250 told rep to hand over me his bottom line as would be getting more quotes,he dropped straight to lb150 which i hold agreed upon.
but how will i know if it has be done correctly??
Answers:    Make certain they are programmed in a recognised documents body - and check it - they may have be struck off!

Ask what they use.
The problem is the average householder won't know.

You will own to calculate the volumes yourself to be sure it looks right - stay contained by all afternoon - it's done from outside through holes every2-3m as a grid pattern.

You can check at any point where on earth there is a cleft accesable. This may be airbricks, pipes, services and- especially roof access.
If you can get contained by your roof - get a mirror on a long pole and inspect the cavity at the eaves.

I have mine done, and looked in the underground store after they'd left.
There be a few bricks missing in there- and a pile of the stuff give or take a few a metre high!
They'd used length of bristle-brush at the airbricks - which is standard- which is good practice, outside finish of render be excellent, and just needed a paint.
Just expect evidence of it to blow out of small gap.- especially the roof.
Have an inspector inspect the work before it is closed up. You won't know, but they will. And spawn sure you are there for the inspection.