At Island Insulation, we understand that no two properties are the same. That’s why every insulation estimate and consultation is tailored to meet the unique needs of each client. Whether you're a homeowner looking for spray foam insulation in St. John's, NL, or a contractor needing commercial insulation services, we treat every project as a custom solution. Our experts take the time to explain every product and process in detail, ensuring that you have full confidence in your decision before moving forward.
We are always available to answer your questions and provide honest guidance to help you choose the most effective and affordable insulation system for your space. Whether you’re looking for cost-effective solutions or want to enhance your home’s efficiency, we’ve got the right options for you.
Industry-Leading Products Backed by Canadian Quality Standards
At Island Insulation, we only work with high-quality spray foam insulation products supplied by trusted manufacturers who are regulated by third-party Canadian quality control programs. These products meet strict national standards for safety, performance, and environmental responsibility. Our team undergoes regular training and holds current industry certifications, ensuring every job is completed with expert precision.
Finding the Right Insulation System for Your Property
We’ll work with you to determine the best insulation material and application for your specific needs, whether that’s open-cell spray foam, closed-cell spray foam, or blown-in insulation. Each type has distinct advantages and is suited to different parts of your home or building. Our team brings years of hands-on experience in residential and commercial insulation across St. John's, NL and surrounding areas, ensuring your insulation system is not only high-performance but also cost-effective.
Why Choose Island Insulation?
Locally owned and operated in St. John’s, NL
Fully certified and trained insulation experts.
Free, personalized consultations and estimates
Use of premium, code-compliant products
Transparent insulation pricing and cost breakdowns
Serving residential and commercial clients across Newfoundland
We’re proud to be a leading provider of spray foam insulation in St. John’s, NL, offering services that improve comfort, reduce energy waste, and provide long-term savings for our customers.
Open-Cell Spray Foam Insulation (1/2 lb)
Open-cell spray foam insulation is a lightweight, non-structural option with an R-value of approximately R-3.75 per inch. While it provides excellent thermal insulation, it does not function as a vapor barrier and is not suitable for below-grade applications. It’s ideal for interior walls and ceilings where sound absorption is a priority and where moisture is not a concern.
Closed-Cell Spray Foam Insulation (2 lb)
Closed-cell spray foam insulation is a dense, high-performance product with a superior R-value and complete moisture, vapor, and air barrier capabilities. This makes it one of the most durable and effective insulation types available today. It adheres tightly to irregular surfaces and seals out air infiltration, making it ideal for use in basements, rim joists, cathedral ceilings, overhangs, crawl spaces, and more.
In addition to its superior insulating properties, closed-cell spray foam acts as an effective radon barrier when installed properly. Its dense structure helps block radon gas infiltration from the soil into your home, making it a particularly ideal solution for basements and foundations in radon-prone areas.
With its exceptional sealing properties, closed-cell spray foam insulation in St. John's, NL is a top choice for those looking to improve indoor air quality, reduce heating and cooling bills, and even strengthen the structure of the building—by up to 400%.
Blown-In Fibreglass or Cellulose Insulation for Attics
If your home was built before 2012, chances are your attic insulation could use a boost. Our team specializes in blown-in insulation in St. John's, using fibreglass or cellulose loose-fill insulation to top up underperforming attics. Blown-in fibreglass insulation is a popular choice for its affordability, ease of installation, and reliable thermal performance. While blown-in insulation doesn’t form an air seal, it’s a fast and cost-effective way to improve thermal performance, especially when installed over existing material.
Expect an R-value of around R-2 to R-4 per inch. Though not as efficient as spray foam, this method remains a practical solution for many older homes, particularly when topped up with high-quality fibreglass insulation.
FAQs – Insulation Services in St. John's, NL
We’re based in Mount Pearl, and regularly serve St. John's, NL, the Avalon Peninsula, and surrounding communities across the island.
Your consultation includes an on-site evaluation, product recommendations, and a detailed spray foam or fibreglass insulation cost estimate based on square footage, insulation type, and current conditions.
Yes. The spray foam products we use in St. John's are certified and tested to meet Canadian safety and environmental standards. Once cured, spray foam is inert and does not off-gas or pose health risks.
Yes. Modern fibreglass insulation is non-toxic, non-combustible, and safe when professionally installed using proper protective gear and equipment.
Most residential spray foam or fibreglass insulation jobs in St. John's can be completed in 1–2 days, depending on the size and type of the project.
Radon is a naturally occurring gas that can seep into your home from the soil. Closed-cell spray foam acts as a radon barrier by sealing cracks in your basement or foundation, reducing exposure.
Spray foam forms a complete air, vapor, and moisture barrier with higher R-values per inch. Blown-in fibreglass is more affordable and effective for topping up attic insulation but does not seal air leaks.
Costs vary depending on the insulation type, thickness required, and application area. We provide clear, detailed estimates during your free consultation.
Get Started with a Free Estimate Today
If you're ready to improve your home or building’s energy efficiency, contact us for a free spray foam insulation estimate in St. John's. We’ll evaluate your property and help you determine the best path forward—whether that’s closed-cell spray foam, open-cell spray foam, or blown-in insulation. Our goal is to deliver the right solution at the right price, every time.
There is a right tool for every job. Liam and his team are here to guide you through the process!
I had my crawl space done and it made a huge difference to the comfort in my home. Last winter my floors were always cold, which in turn, have to turn up the heat to compensate. The floors are warmer now, so it should cut down on the light bill. These guys are very professional and do very tidy work. I highly recommend them for the job.
- Donald O
The process from start to finish was great, from the speedy and accurate quote to the level of tidiness when installing the foam to the clean up. Island insulation was a great company to deal with, and had all the information on insulation rebates offered by NL Power to make the decision on installing spray foam easier.
- Jon R
I'm a REALTOR® and always looking for good dependable resources, people who lend a high predictability of providing favorable outcomes for my clients. I strongly recommend Liam! Excellent all aspects - a great product and excellent friendly professional service, easy to do business with, aims to please! Thank you!!
- Rob B
These guys were super easy to deal with and did a thorough job in a challenging space. I have an older downtown home with a weird crawl space which they handled in a expert manner. Highly recommend.
- Aaron
Highly recommended, did great work, fast and efficient, well priced and easy to communicate with, appreciated the advice on future insulation jobs as well.
Chris H
Excellent product and even better service! The product is installed so quickly and you can feel the warmth straight away! Love that this is a local company! Shop local!
- Bonita
Nice job done and very professional!
- Louis
Excellent service. Simple, fast, and thorough. Friendly, helpful and knowledgeable personnel. Highly recommended.
- Andre
I was very pleased with the service. Liam got back to me very fast with quote. I would recommend this company.
Cheryl D
My 140 year old Victorian home, in downtown St. John's, was always cold in the winter. Pipes would freeze, and my floors would feel like ice every February. Not anymore! Ever since Liam worked on insulating my crawlspace the home has been much easier to keep warm. Even on the coldest day of the year the temps inside are toasty. The oil in my oil tank now lasts twice as long before fillup, and the floors are warm enough to walk barefoot! Best of all, the pipes no longer freeze. I'm stunned at the difference, and the price even came with an over 50% rebate from NL Power. Using Island Insulation was the best choice I made in 2019. Would definitely recommend their trustworthy service to anyone. 5 stars out of 5!
- Bob
Contact Liam for a free estimate today.
Why Insulate? It’s science! Greener homes that consume less energy have systems in place that work to prevent heat transfer. The result? A more comfortable living space, long term savings and a reduced carbon footprint.
