Call Now1.800.265.1914

Getting Quality Performance from Fiberglass Batt Insulation

May 18, 2016

Fiberglass batt insulation works in two ways to provide thermal insulation. First, air is trapped in the tiny spaces built into each batt, slowing down conductive heat movement. Second, the glass fibers reduce radiant heat loss, adding further insulation value. Important to note is that small air voids (within the fiberglass batts) will slow heat flow, while larger voids will actually do the opposite. These are dynamics that will impact the performance quality of the installation. For many a homeowner, installing fiberglass insulation might seem like a viable DIY project. In short - it's not. For the maximum in product performance, a professional install is recommended. Expert installers ensure the best contact between batts and surfaces, as well as a snug fit between batts. Doing otherwise will compromise both air leakage and thermal performance. As well, an expert install will guarantee that an effective moisture barrier will be installed accordingly. Fiberglass batt insulation must also accommodate irregular cavities, ductwork, plumbing and wiring. Here, the batts must be precisely cut to fit, and placed strategically to allow for optimum performance. This is not a time for installation shortcuts, a hurried job, or a sloppy install - even by an expert. For the best long-term results, it's important to follow manufacturer specifications, as well as any prescribed building code. Not doing so will present future complications. Fiberglass batt insulation will insulate properly when air can be effectively trapped. As it is, the batts are not meant to be an "air barrier" themselves, which means that a space like the attic still requires sealing. This is where spray foam insulation may play an integral part in complimenting the performance of the batts. For the professionals, sealing a space tight (whether the attic or the basement) is essential for any insulation product to deliver their advertises outcomes. To have a building inspector or energy auditor discover flaws and weaknesses in insulation after a job has been done is counter-productive. This is work that should be done right from day one. It means hiring an installation team that understands fiberglass batts; has expertise with the install; and has a quality approach to the overall project. More importantly, it's essential to do business with a company that is reliable and reputable - price shopping will not always work. Since every home is going to be different, installers need to fully appreciate the space that's being insulated - it could be a cathedral ceiling; an area with pre-existing framing; even thermal defects that came with the original construction. Whatever the case (and especially during a renovation), it's best for trades to work together to ensure the best results. Leaving even the smallest details unattended can have an impact on the integrity of the insulation and on the R-Value. Where fiberglass batt insulation is recommended or specified, there is no alternative to installing everything properly, and without cutting any corners. Even with possible extra labor costs, there are no disadvantages to doing everything right the first time - and long term results will show.

Western Ontario

935 Keyes Drive
Woodstock, Ontario
Canada N4V 1C3

Phone: 1-800-265-1914

Fax: (519) 539-7946
TOLL FREE: 1-800-265-1914

Southwestern Ontario

7035 Industrial Drive
Comber, Ontario
Canada N0P 1J0

TOLL FREE: 1-800-265-1914

Muskoka, Haliburton, Northern Ontario

1027 Elwell Park Road
Gravenhurst, Ontario
Canada P1P 1R1

TOLL FREE: 1-800-265-1914

Central Ontario

29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

TOLL FREE: 1-800-265-1914

GTA East

103 North Port Road
Port Perry, Ontario
Canada L9L 1B2

TOLL FREE: 1-800-265-1914

GTA & South Central Ontario

450 Industrial Dr,
Toronto (Milton), Ontario
Canada L9T 5A6

TOLL FREE: 1-800-265-1914

Eastern Ontario

1035 Moodie Dr #1,
Nepean, ON
K2R 1H4

TOLL FREE: 1-800-265-1914


259 Campbell Street
Sarnia Ontario
Canada, N7T 2H3

TOLL FREE: 1-800-265-1914

Niagara Region

6260 Don Murie St
Niagara Falls, ON
L2G 0B4

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.


Best of 2017

From reputation to responsiveness, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thanks to everyone for the great ratings! 

HomeStars 2018

Best of 2018

For the second year in a row, HomeStars consistently ranks Great Northern Insulation at better than 95% for customer satisfaction. Thank you again to everyone!

Homestars Best of 2019 Award

Best of 2019

For the third year in a row, HomeStars ranked Great Northern Insulation at better than 95% for customer satisfaction.

Homestars Best of 2020 Award

Best of 2020

For four years now, HomeStars has ranked Great Northern Insulation at better than 95% for customer satisfaction.


GNI is the Authorized & Trusted Insulation and Air Sealing Installer for Lowe’s

Enenrgy Savers

Energy Saving

Energy saving and energy efficiency is easier than one might think. Great Northern Insulation helps to identify performance issues, while taking advantage of improvement opportunities.

100% Canadian

100% Canadian

Great Northern Insulation is recognized as Canada's largest full-service insulation contractor. GNI is 100% Canadian owned, proudly serving Ontario customers since 1980.

Foam Masters

Do it right the first time
- with foam mastersTM

WALLTITE® ECO™ is a high-performance system, professionally installed by certified and approved specialists. Its C.C.M.C. approved (Canadian Construction Materials Centre) - with product quality guaranteed - and with installation by highly trained experts with the technical know-how to do the job right, the first time.


Gold Certification promise

GREENGUARD® Gold Certification ensures the strictest criteria for low-level chemical emissions. Certified products are safe for individuals with sensitivities (children/elderly) and safe for use in school environments and health-care facilities. The product certification is widely recognized by the LEED Rating System (Leadership in Energy/Environmental Design).

Insulthane Extreme

Insulthane® Extreme

For the ultimate in high performance spray foam insulation, Insulthane® Extreme is the professional choice for residential, commercial, and industrial application. With improved thermal performance over other products, Insulthane® Extreme has an exceptionally low Global Warming Potential (GWP). Considered environmentally friendly, this next generation spray foam insulation is non-ozone depleting, and exceeds specifications of other HFC product alternatives.


Multi-attribute product certification

ECOLOGOTM is an accredited sign of environmental performance – holistic – green – sustainable - and compliant with strict, third party standards. Life cycle criteria for product certification may include manufacturing and operations; health and environment; product materials and performance; and product innovation, development, and management.


3MTM products.
Quality + Performance = Savings

3MTM energy-saving products are designed to keep warm air in, and cold air out, while keeping energy bills down. Products optimize energy efficiency in buildings and homes; improve indoor environment for occupants; and effect the reduction of seasonal energy costs. 3M products are authorized for LEED credits (Leadership in Energy/Environmental Design).


Baeumler ApprovedTM
Professional, Certified and Insured

Baeumler ApprovedTM gives you peace of mind when connecting with contractors, trades and home service providers. All Baeumler Approved members have demonstrated high quality work for customers and other trade professionals. Members must also have Workers Compensation, liability insurance of at least $1,000,000 and prove professional certification.

Holmes and Holmes

Holmes and Holmes


Mike Holmes and his son Mike Jr. (MJ) convert MJ’s bachelor bungalow into a two-storey home for MJ and his girlfriend Lisa. Choosing the newest materials and build techniques, the father and son team follow Mike’s famous motto – “Make it right.” The show can be watched on HGTV and DIY Network.


Enbridge Incentives

The Energy Conservation Program provides incentives of up to $1,600 to customers who achieve energy efficiency and fuel savings – and Great Northern Insulation can pave the way.


Great Northern Insulation proudly abides by a renovation-specific Code of Conduct set by RenoMark™.


We are Verified & Bonded by eRenovate. When you choose to proceed with our services through their platform, you receive the gaurantees set forth through their program.

Please, enter a valid value

Incorrect values!