This was the first company to give me a quotation. In the meantime a number of others either failed too return my calls or promised to (a) come out to see the site and (b) give me an estimate, and then failed to do either (a) or (b), or both. The final choice was between Ciaran Nangle (C B Construction) and Greensheep Insulation. I would have been happy enough with C B Construction, but I felt that the estimate from Greensheep was a LITTLE more professional and detailed. In due course Greensheep arrived at the specified time, and did the job without fuss less than half a day.