I would strongly recommend JCS as they provided me with excellent service, for the best price. I received quotes from 4 contractors for a project consisting of: attic insulation top-up from R30 to R60 and air sealing; general house air sealing and adding batt insulation in my basement. Jay was the most thorough in his inspection of the house, and the only one who asked to visit each room to see whether there were signs of moisture on the ceilings. He knows very well the existing energy rebate programs from Natural Resources Canada and Enbridge and what the Energy Auditors are looking for. He is the only one who offered air sealing of all attic-accessible light fixtures and bathroom vents as well as general air sealing of the house (caulking around window trims and doors (interior), foam gaskets in electrical outlets and switches of perimeter walls) at no extra cost, while other companies would charge an extra $300 for attic sealing, and $900 for general air sealing of the house without even evaluating what work was required. He estimated the attic surface size accurately, while one company provided a quote for 400 square foot larger than the actual size, inflating the cost of the estimate by close to $1200! Jay and his colleague Many were on time, very pleasant, professional in their approach and very helpful with all my questions. The communication with JCS was clear and prompt replies came for each of my electronic communications with the company. With JCS, you get the best bang for your buck, hands down!