Jason McNulty, Belfast. Initially hiring him for some insulation work, we were so impressed by his efficiency, expertise and depth of knowledge that we went on to hire him for a large addition. The addition, in turn, is an absolute work of art, as well as a model for energy efficiency (which we confirmed with an infrared scan and a blower door test, thrown in free of charge). We have found our contractor, and would recommend him unconditionally for any project large or small.
Diagnose, solve and verify - If you are not testing you are just guessing!