the other thing with these people, they never have a leaflet to leave you with, they never introduce or state what company they are from
he would have to ask at the office
"how do you take it back out?"
I asked one of them what they would do if it caused problems.... he said they would take it out again free of charge
yet all these door knockers claim to be experts and say its no problem
nextdoor had it done (semi) and has suffered terrible damp since
i had a proper outfit come and look and they were not happy to do the job because of the construction of the cavity
normally some kid in suit thats too big, wearing a high vis with "energy assessor" on the back
i get these cavity wall people all the time....