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Details & Description

Products and Services

  • Blown Loose Fill Attic Insulation,
  • Spray Foam Insulation,
  • Cellulose,
  • Batt Insulation,
  • Blown-in Wall Insulation,
  • Crawl Space Insulation,
    • Fireproofing,
    • Thermal Barrier,
    • Insulation Removal,
    • Airsealing,
    • Acoustical System,
    • Cladding,
    • Firestop & Smoke Seal,
    • 3M Window Film,
    • Vapour Barrier,
    • Building Envelope Consultation,
    • Blower Door Testing,
    • Fibreglass,
    • Thermal Imaging,
    • Insulation Consultants,
  • more...
  • less...

Brands Carried

  • BASF Walltite Eco,
  • Honeywell,
  • Owens Corning,
  • Gaco Western,
  • Winroc,
  • 3M,

Specialties

  • Insulation Services,
  • Insulation Consultants,
  • Highest Performing,
  • Environmentally Friendly Products & Services,
  • On Budget,
  • Installed Right,
    • One Source / Full Service,
    • On Time,
  • more...
  • less...

Languages Spoken

  • English,
Useful Information

Opening Hours *Holiday hours

Monday
Tuesday
Wednesday
Thursday
Friday
Verify with Merchant

Methods of Payment:

  • Financing Available

Ratings & Reviews - Great Northern Insulation

How would you rate this business?
4.8/5
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  • Very good
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    junefebers
    By

    I would recommend GNI , they are very professional and informative. They also cleaned up everything after they were done A+ Company and workers, Jeremy and James were awesome!!

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    gmas7220
    By

    Had a great experience with GNI. Doing business with them is very efficient, transparent, and they ensure satisfaction before leaving the job. I would recommend them to any other business or homeowner. They hold themselves accountable for all their work.

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    joelpinsk118863
    By

    Excellent company with superior service. Great work that was timely done well within our budget.

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    baby5464
    By

    Great company! Very professional and knowledgeable. Easy to deal with and timely service! Definitely would recommend to anyone!

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    rozi1283
    By

    Very professional from the beginning to the end. Everyone was friendly and answered all my questions no matter how silly they were. I am a widow and this is the first dealing with insulation. I would and have recommended you to friends and family.

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    Teresa S
    By

    Very friendly and professional. Answered all our questions. They explained what they would do to get our attic up to a R60 rating. They showed up on time, did a great job and cleaned up afterwards.

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    Donna Dean-Harper
    By

    James, Del and Lucas were awesome, very polite and did an excellent job, Did not have to worry about a mess, I thought he was going to vacuum my whole house. They were a pleasure to have here and would recommend this company to anyone, These three took the time to answer our questions, and were very knowledgeable, Well Done Boys

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    jeff3928
    By

    They did an amazing job, were friendly and kept the house where they were working super clean. Couldn't have asked for more!

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    east9898
    By

    I live in an old house. And I am a certified worrier. The ceiling in our kitchen was constructed long before building codes. I was concerned about having someone up there blowing in insulation. Everyone, from Nick who I spoke to on the phone, to Chris the field inspector who came out to look at the attic beforehand, to Brennan and Del who did the work, went out of their way to ensure my peace of mind. A great organization.

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    gord5383
    By

    Service personnel are polite, courteous, efficient and effective. Any mess is cleaned-up, thoroughly. Brennan and Del thanks for a job well done!

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    sandrinemark043022
    By

    The Team led by Del was onsite today (Jul.13, 2018) to insulate our Attic and the Garage - Brennan, John and Will were assisting. The team worked very well together, very professional, very efficient, very organized, did a great job. Customer Service was amazing! The workmanship was top notch - arrived on time and took the time to get the job done well. They vacuumed the area prior to leaving too. Very impressed - thank you to Del, Brennan, John and Will of Port Perry.

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    Patrick Major
    By

    I had my attic insulation topped-up by Brennan/Taylor/Lucas, they arrived on time, and completed the work quickly and efficiently, while also explaining to me the process they would take to get the job done. I am very pleased with the work that was completed. I would use them again in the future.

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    raan4156
    By

    company was very professional, tidy and went above and beyond, if you are interested in getting your home insulation installed i would highly recommend Great Northern Insulation

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    bmcl4213
    By

    The process was seemless. The installers Brennan and Scott were on time, professional and explained everything regarding the process and did an amazing job. They treated our home and did the work as if it was their own home. They went the extra step. I would recommend them and GNI for your insulation work.

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    suec4940
    By

    Very professional on time cleaned up before they left, Brennan,John and James were Very polite and courteous. Would highly recommend this company.!!!

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    glen8810
    By

    On time, courteous staff!

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    will6068
    By

    Great work, fast and punctual!

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    dbac3438
    By

    From beginning to end the process was very professional and smooth. The crew arrived at 8:30 am and went to work immediately putting down plastic at the entrance, inspected the attic found it in good condition and began installing the insulation. The staff were Brennan and Lucas who explained everything and worked very efficiently. The house was left clean and tidy and we were very satisfied with the installation. We would highly recommend this company to anyone.

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    Christine MacPhee
    By

    GNI was very professional, staff Brennan, John and James were on time, very friendly, covered all of the area into house with drop sheets, and left the house clean.

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    rand0045
    By

    Very professional, friendly staff and always on schedule.

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