Thermo Seal Insulation Systems was founded on the simple principles of providing superior products and service so everyone can enjoy the comfort and savings from having the best insulation available. With a strong dedication to quality and workmanship, it's no wonder Thermo Seal Insulation Systems has become the successful insulation contractor they are today. Where We're Going: Thermo Seal Insulation Systems has continued to grow over the years. Muskoka residents and cottagers have been witness to the growth of our head office and warehouse which is right on Hwy 11. We are the largest Blow-In-Blanket Contractor in Ontario and one of the largest Spray Foam Insulation Contractors. One benefit to still being family owned and operated is that we don't govern ourselves like a corporation. We care about our customers and the communities in which we operate and stay true to our motto: Quality, Integrity, Pride - Since 1989.