We have used Northwood twice in the last couple years....we origionaly saw them on Holmes on Holmes so we tried calling them when we needed work done. They did a great job and we would recomend them to friends that needed work done for sure. My only negative comment would be that we had trouble with scheduling on our second job....we had very specific days that we needed them in because our reno counted on certain things happening on certain days and we were a little dissapointed in some miscommunication with regards to that. In the end it all worked out though and our house is nice and warm this winter.....