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51 Stephenson Rd. #12 West Utterson, ON P0B 1M0



Blow-In Fibreglass Insulation Services in Huntsville

Thermo Seal Insulation Systems is a full service insulation contractor serving Ontario since 1989. After more than 28 years in the insulation industry specializing in blown-in fibreglass insulation, we have the knowledge and expertise to assist you in finding the most effective and efficient insulation available for your project on the market today.


Customer satisfaction is our priority

Our professional and certified installation crews will ensure your job is done right the first time. With a reputation for quality, integrity and pride, we stand by our work with a workmanship guarantee like no other. Why settle for just any insulation contractor? Thermo Seal Insulation Systems have onsite quality control supervisors, pre-job check personnel and sales representatives that care about your job. That's why, when it comes to insulation contractors, Muskoka counts on us. Contact us today for quality fiberglass insulation services in Huntsville 


Fully Insured, WSIB Certified, Canadian Home Builders Association Member

Blown-In Fibreglass

The blown-in fibreglass system was brought to Ontario by Thermo Seal Insulation Systems in 1989. Although blown-in fibreglass insulation has been around for more than 20 years, many people are still unaware of it, but one thing has remained true over the years: once customers see our blown-in insulation product, the benefits are undeniable.

What is Blown-In Fibreglass Insulation?

The blown-in fibreglass system we install is a is a state-of-the-art insulation system that uses virgin fibreglass insulation (no additives, binding agents or chemicals) to manufacture a seamless blanket of insulation in cathedral ceilings, floors, and framed walls. To install, loose fill fibreglass is blown through a hose and out a nozzle into the cavity behind a fibre mesh netting that is precisely attached to the studs. With 3 times the density of standard fibreglass batt insulation, the choice of which insulation to install is an easy one. The proven performance of our blown-in insulation guarantees that it will last the lifetime of your home, providing you with endless savings, comfort and energy efficiency.

Why Our Blown-In Fibreglass System is a Smarter Choice

  • High R-value (R24 in 2 x 6 wall)
  • Seamless blanket of insulation
  • Custom fit for irregular framing
  • No chemical binding agents
  • Licensed, professional installers
  • Will not settle, sag or lose R-value
  • Made from a rapidly renewable resource
  • GREENGUARD certification
  • Superior sound control
  • Will not absorb moisture
  • CCMC tested and approved
  • Proven performance (over 20 years)
  • Exceeds building code requirements
  • Reduces air infiltration
  • Eliminates heat loss and saves money
  • Qualifies for L.E.E.D. credits

Guaranteed Not To Settle

Thermo Seal Insulation Systems was the founder of the blown-in fibreglass insulation in Canada and has installed blown-in insulation in thousands of homes since 1989. When we insulate your home with our blown-in fibreglass insulation, you have our guarantee that it will not settle from gravitational forces or household vibrations.

The Canadian Construction Materials Centre (CCMC) has conducted extensive testing, and their conclusion is that our insulation does not settle. Independent laboratories at CCMC conducted a drop test of an 8 foot wall blown with dense packed fibreglass insulation. They lifted up the mock wall and dropped it 60 times from a height of 2.5 cm to simulate household vibrations and gravitational forces. The results were undeniable: at the correct design density, our insulation does not settle. Thermo Seal can guarantee that your insulation will not settle because our trained, professional installers conduct density tests in every application to determine that the correct design density has been achieved.

Thermo Seal will not install cellulose in walls or attic applications because of settlement problems.

Installed by Trained Professionals

Our installers provide the highest quality of workmanship available. Installation procedures and techniques have been crafted with more than 25 years of experience using top of the line equipment and materials. Only qualified contractors may install the blown-in fibreglass insulation. Don't be fooled by imposters who claim to have the same system. Thermo Seal Insulation Systems is the expert in installing the blown-in fibreglass insulation systems in Canada.

Custom Fit & Uniform Density

When conventional batts are installed in non-standard cavities or in irregular framed areas, problems occur. Batts must be cut to fit these areas, creating gaps and seams that allow heat loss and, in turn, significantly decrease the working R-value. The blown-in fibreglass insulation manufactures a seamless blanket that custom fits any size or shape cavity. This guarantees a uniform working R-value throughout the entire cavity and provides enhanced air infiltration control.

Polyurethane Spray Foam for North Bay Homes

Our product is a medium density (2 pounds per cubic foot) closed cell SPF. Spray foam insulation will not shrink, sag, settle or biodegrade. By acting as an air and vapour barrier, medium density spray foam insulation provides an all-in-one complete wall system. In addition, polyurethane foam insulation products have a higher R-value per inch than batt insulation.

When you invest in spray foam insulation, you will reap long term rewards in saved energy dollars, increased control of indoor air quality and improved comfort, health and safety for the life of your home. Your heating and cooling equipment will work more efficiently, use less energy (gas, electricity, oil, etc.) and will maintain a more uniform and consistent temperature. This also increases energy efficiency by allowing for downsizing of heating and cooling systems.

Benefits of Spray Foam Insulation in Peterborough Homes

Polyurethane spray foam has many benefits for homes, attics and more. From decreasing air leakage to increasing structural integrity, we highly recommend spray foam insulation in Peterborough. The benefits of SPF insulation include:

  • High R-value (R30 in 2 x 6 wall)
  • Ideal for new or retrofit construction
  • Adheres directly to substrate
  • Seamless, permanent coverage
  • Increases structural integrity of framing
  • Uses renewable resources
  • Superior air barrier material
  • Meets vapour barrier requirements
  • CCMC tested and approved
  • Zero Ozone Depleting Substances (Zero ODS)
  • Exceeds building code requirements
  • GREENGUARD Certification & L.E.E.D. credits
  • Eliminates heat loss and saves money

Air & Vapour

Spray foam insulation will keep your Peterborough home as airtight as possible. Our closed cell foam will drastically reduce air leakage and will keep water vapour from getting in and condensing. From sealing rim joists to the attic side of a partition top plate, polyurethane spray foam is the solution to insulation in North Bay.


The polyurethane spray foam we use in North Bay is the highest rated insulating spray foam available. With an initial R-value per inch of 6.6, we can boast a higher long-term thermal resistance (LTTR) of R6 per inch. The LTTR is a requirement for R-value classification in Canada and is conducted by independent laboratories approved by the Canadian Construction Materials Centre (CCMC).

Why Choose Us?

We have the experience and machines to safely install spray foam insulation in Peterborough and North Bay. We know the ins and outs of this process, so the job will be done right the first time. Our polyurethane spray foam is always mixed properly because we adhere to time and temperature constraints that the foam requires. Since spray foam insulation gets in the air and sticks to hair and objects, we make sure that you and your home will be spotless when we leave. For installation of polyurethane spray foam in North Bay, call Thermo Seal Insulation Systems.

Blown Attic Insulation

The same virgin fibreglass blowing wool used in blown-in fibreglass insulations is also loose blown in attic applications. Loose blown fibreglass is great for new construction and retrofit applications and makes your home more energy efficient. Unlike cellulose, properly installed loose blown fibreglass will not settle. Attic insulation is a big contributor to home heat loss, but it's not the only problem that homeowners and contractors run into.

Attics & Heat Loss

Perfectly insulated attics can still have heat loss, ice dams and damage caused by inadequate ventilation. Other insulation contractors do not stress the importance of attic ventilation enough. If you don't ventilate properly, water vapour may condense and collect on insulation and rafters. This will reduce the effectiveness of the insulation and could damage the house and roof.

Another big concern when insulating attics are pot lights. Pot lights can be a major source of heat loss if not insulated properly. At Thermo Seal Insulation Systems, we set the standard for attic insulation by taking all of these factors into account when insulating your home or cottage.

Our Promise to You

We will go above and beyond current building standards for attic insulation. An attic insulated by Thermo Seal Insulation Systems will be properly insulated and ventilated, and all known sources of heat loss will be taken into consideration during the quotation and installation process.

Insulation Removal

Types of Insulation We Remove

We will remove the following types of insulation from an attic: fibreglass batts, cellulose, vermiculite that has been tested and any other loose blown material. We will not remove any vermiculite that has tested positive for asbestos.

Do I Have to Remove My Existing Insulation Before a New Installation?

No, unless there is a reason to. If there are animal problems (feces, urine) or moisture (mould, mildew) we may recommend removing the existing insulation. Usually, we can top up your existing insulation with new insulation to bring the R-value up to a recommended level. This will save money because you are making use of what you already have in the attic.

How Do You Remove the Insulation And What Do You Do With It?

We have an insulation removal machine that uses a powerful vacuum to suck the insulation through a wide hose and into a giant commercial garbage bag. Batt type insulation is removed by hand and put into the same giant commercial garbage bags. We then take the insulation to the landfill.

Retrofit Insulation

There is a growing need in retrofit construction projects to make older homes more energy efficient. One way this is accomplished is through insulation. Insulation can dramatically increase the energy savings in an older home, but there are no guarantees that every retrofit application will return the same benefits.

Wall Retrofits: Why There Are No Guarantees

Every home is different and constructed using various building materials. The extent of your renovation will greatly affect the success of your retrofit insulation installation. For example, if you are able to remove all interior drywall and/or wall coverings, we could treat your installation the same as we would new construction. However, if you are not capable of exposing the entire wall cavity, then we would use a 2" Relton hole saw to drill into each cavity (twice) in order to blow the insulation into the wall. The problem with this is that sometimes insulation may already exist in the wall and there is no guarantee that the cavity will fill completely or evenly.

Other options for retrofit applications are to do the install from the exterior of the building. Maybe you are replacing your siding or are willing to remove the siding. If so, count on our insulation contractors in Muskoka to do the install from the outside of the cavity while the siding is removed.

After the Installation

If your retrofit insulation was installed by drilling holes through the wall, the installation crew will use wooden circular plugs to enclose each hole. Thermo Seal Insulation Systems does not finish the drywall or remove or replace siding. You will need to either do this yourself or hire a subcontractor for assistance. If you are a home owner planning to insulate your property, go through our tips on how to decide the right insulation system for you.

Attic Top-Ups

Another way to retrofit your home's insulation is by topping up your existing attic insulation. While attic insulation is important, many people don't know that it's more important to ensure you have sufficient ventilation. Factors that can affect the cost of attic top-ups are improving ventilation and trampling down existing insulation if additional ventilation is required.


Thermo Seal Insulation Systems is a full service insulation contractor providing you with the option to fireproof structural steel or protect polyurethane spray foam insulation with a thermal barrier.

Fireproofing (Monokote® MK-6®)

Proven in-place performance on interior structural steel makes Monokote MK-6 the most widely used fireproofing in the world. MK-6 is a gypsum based cementitious spray-applied fireproofing designed for application to steel and concrete substrates. Monokote cementitious fireproofing offers many significant advantages to the architect, owner, applicator and building occupant.

Thermal Barrier for Polyurethane Spray Foam Insulation (Monokote® Z-3306)

This option is a spray-applied thermal barrier, which is designed to help you meet insurance requirements and building codes. As a cementitious, fire-protective coating, Monokote Z-3306 is specifically formulated to be used over rigid, polyurethane and polystyrene foam plastics. When it is used on interior foam surfaces or on walls and ceilings, Z-3306 creates an incredibly durable thermal barrier that will protect against fire as well as heat.

Per the Ontario Building Code, all foam plastic insulation must be covered with an approved thermal barrier to obtain occupancy permits. According to the Ontario Building Code, gypsum board, plywood or other options can also be utilized to create an approved thermal barrier.

Learn More

Get information about related topics like building codes, insulation requirements and asbestos by downloading our pdfs.

2012 Building Code Information
2012 Insulation Requirements
Asbestos Identification & Testing


Put our experience to work for you today. Choose the insulation contractors Muskoka trusts – choose Thermo Seal Insulation Systems.


Contact Us Today

Are you looking for fiberglass insulation services in Huntsville? If yes, count on Thermo Seal Insulation Systems. Contact us today to learn more and to receive a free estimate. 

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