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Established in 1949. One of the oldest window, door, roofing, insulation and siding companies in the GTA. We service the entire GTA. Proud members of BBB (A+ rating), Renomark and a Consumers Choice award winner for business excellence.

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John McLellan Contracting Inc. is an award-winning, full service general contracting company proudly located in and serving Durham Region since 1995.

How to Choose the Right Markham Insulation Company for My Project?

A properly insulated home benefits from lower utility bills, a consistent and comfortable indoor temperature, and naturally more sound absorbing walls. Markham insulation contractors provide a wide range of insulation services, from installation to removal. It’s important that you choose the right company to take care of this important home improvement service.

Start your search for companies that specialize in insulation in Markham at the Find Pros page, where company profiles include helpful information like before and after photos, past projects, and customer reviews. The unbiased feedback found in the insulation reviews is a great tool as you narrow down your search for the right local company.

What Do Insulation Professionals Do?

Insulation contractors provide both commercial and residential services, including installation, repair, and removal, and some Markham insulation professionals will also offer air sealing and HVAC system services. Common areas for home insulation services are the attic and basement, for both cosmetic and home energy needs.

Your Markham insulation contractor will recommend the type of insulation best suited to your house and budget, which may include one or more of the following:

  • Blanket insulation is rolled, is relatively inexpensive, and includes the popular fiberglass insulation variety.
  • Concrete block insulation is used for major renovations, like when building the foundation of a home.
  • Spray foam insulation is good for adding insulation to existing finished or irregularly shaped areas of the home.

As the services and expertise of each Markham insulation company will vary, reach out to a few different contractors to find who will be the right fit for your project needs. The list below is a selection of some of the services you can ask about:

Attic Insulation. Having a properly insulated attic is beneficial in many ways. The best attic insulation helps ensure your entire home maintains a consistent temperature – keeping your house comfortable and your utility bills down. A well insulated attic also prevents drafts, reducing any cold or hot zones in your house.

Insulation Removal. Home insulation can lose its efficacy over time, at which point a professional can remove the existing insulation and replace it with a better solution for your needs. For instance, fiberglass and cellulose insulation are often used in unfinished spaces, like attics. The insulation is eventually damaged by rodents or compression from boxes and furniture.


Insulation Professionals Near You