Well it's done - they did the attic & walls & they were very efficient & tidy. They used a coloured filling on the outside for the holes they drilled & although you can see it, I've seen other places done where it's really obvious. They washed down the paths front & back & also swept up the mess. The guy offered to hoover for me but I wanted to do it myself. There was a bit of mess in the house, just the stairs & landing really - the weather was horrible while they were in & out of the house so it couldn't be helped. So we're pleased with them, they arrived when they said they would & got on with it. Hopefully, from what I've read it'll pay for it's self in heating savings.