Spray Foam Insulation in St. John’s, NL
Newfoundland Tough Insulation for St. John's Homes
St. John's faces North Atlantic fury like no other Canadian city — fierce winds, relentless rain, and winters that never quit. Our spray foam insulation is built for the Rock's unforgiving climate.
Flexible Financing Available
Learn more about our financing options →
25,000+ Homes Insulated
Satisfaction Guaranteed
Red Seal CertifiedWhy Does St. John’s Need Spray Foam Insulation?
Spray foam insulation seals air leaks and provides the highest R-value per inch, reducing heating costs by 30 to 50% in cold Canadian climates.
St. John's is one of Canada's windiest, foggiest, and wettest cities. Its location on the Avalon Peninsula exposes homes to raw North Atlantic weather systems year-round. With a heating season running from September to June and precipitation arriving horizontally on 100+ km/h gusts, St. John's homes need insulation that seals airtight and resists moisture — making spray foam the premier choice for the city's mix of historic and modern housing.
St. John’s's Insulation Challenges
St. John's receives among the highest annual precipitation of any Canadian city, with constant moisture exposure
Fierce North Atlantic winds drive rain horizontally into building envelopes, bypassing inadequate insulation
The city's older housing stock — many homes built pre-1990 — have chronically under-insulated walls and attics
A 9+ month heating season makes energy waste from poor insulation extremely costly for St. John's homeowners
How Spray Foam Helps
Spray foam's seamless air barrier resists St. John's notorious wind-driven rain unlike batts or blown-in insulation
Closed-cell foam maintains full R-value through the province's brutal winters, unlike cellulose or fibreglass
Superior air sealing dramatically cuts Newfoundland Power heating bills over the long heating season
Moisture resistance prevents the rot and mould issues common in St. John's older building stock
Winter Temperature
-5°C to -15°C
Climate Zone
Zone 6
Recommended R-Value
R-60 attic, R-24 walls
What Type of Spray Foam is Right for Your St. John’s Home?
Open-cell foam (R-3.7/inch) is ideal for interior walls and soundproofing, while closed-cell foam (R-6.5/inch) provides a moisture barrier for basements and exteriors.
St. John’s's Zone 6 climate and north atlantic horizontal rain conditions inform our recommendation for the right spray foam type.
Open-Cell Spray Foam
R-3.7 per inch
- Excellent soundproofing properties for interior walls
- More flexible—ideal for areas with movement or settling
- Allows moisture to pass through (breathable)
- Cost-effective for large interior applications
- Perfect for interior walls, attics (with vapor retarder), and floors
Best for St. John’s: Interior partition walls, soundproofing between rooms, and attic applications where a separate vapor barrier is installed.
Closed-Cell Spray Foam
R-6.5+ per inch
- Highest R-value per inch of any insulation material — ideal cold climate insulation
- Acts as its own vapor and moisture barrier
- Adds structural rigidity to walls and rooflines
- Resists water, mold, and moisture infiltration
- Ideal for exterior walls, basements, crawl spaces, and rim joists
Best for St. John’s: Exterior walls, basements, and any area where moisture is a concern. Provides the R-value needed for your climate zone.
Why Choose Greenfoot for Spray Foam in St. John’s?
Greenfoot has insulated thousands of homes across 5 provinces — certified spray foam technicians, manufacturer-backed warranties, and deep experience with local climate conditions.
Spray Foam Specialists in St. John’s
Our St. John’s technicians specialize in residential and commercial spray foam applications. We've insulated 25,000+ homes across Newfoundland, understanding the unique thermal demands of NL's climate.
Certified Installation Experts
Factory-certified for open-cell and closed-cell spray foam systems. Our manufacturer certifications ensure your insulation performs optimally and meets Newfoundland's building code requirements.
Complete Home Coverage in St. John’s
Whether you need attic insulation, wall cavities, or basement rim joists sealed, we design custom home comfort solutions for St. John’s homes. Our thermal assessments ensure proper R-value for maximum energy efficiency and energy cost reduction.
NL Rebate & Insulation Financing Options
We help St. John’s homeowners access federal and Newfoundland provincial rebates for eco-friendly insulation upgrades. Flexible insulation financing options available—conditions apply.
What Should You Expect During a Spray Foam Estimate & Installation?
Most spray foam insulation projects take 1 to 2 days, starting with a free home assessment and ending with a thermal imaging verification.
STEP 01
Free Insulation Assessment
Our certified Home Comfort Advisor visits your property to conduct a comprehensive free insulation assessment and spray foam evaluation at no cost:
- •Measure all areas requiring spray foam application
- •Assess your home's current insulation performance
- •Identify air leakage points and evaluate thermal bridging issues
- •Determine the precise amount of spray foam insulation needed for maximum energy efficiency
- •Provide a detailed written quote with specs and pricing
COST: Free, no obligation
Timeline: 3-5 Business days
STEP 02
Efficient Project Coordination
Following your spray foam insulation assessment, our team coordinates your installation timeline:
- •Scheduling based on your home's specific insulation needs
- •Clear communication about project duration
- •Weather considerations for optimal spray foam application
- •Any special preparation requirements explained in detail
Timeline: Scheduled within 1-2 weeks
STEP 03
Expert Insulation Application
Our experienced Greenfoot spray foam installation team arrives with professional-grade equipment:
- •Surface preparation and protective masking
- •Precise spray foam application by certified technicians
- •Complete air sealing and thermal barrier creation
- •Quality control testing throughout the process
- •Highest safety standards maintained during installation
Single area: 4-8 hours
Multiple areas: 1-2 days
STEP 04
Project Completion Confirmation
Once your spray foam insulation installation is complete, our technician contacts you directly:
- •Confirm project completion and review work performed
- •Provide post-installation safety guidelines
- •Ensure all areas have been properly insulated and sealed
- •Important timing information for safe re-entry to your newly insulated home
Timeline: Same day notification
STEP 05
Essential Safety & Preparation Guidelines
For optimal indoor air quality and your safety, please follow these requirements:
- •Be present upon our team's arrival for a pre-installation walkthrough
- •Ensure a minimum of 4 feet clearance from all exterior walls
- •Remove any objects leaning against or placed along exterior walls
- •Stay away from your home for a full 24 hours following spray foam application
- •You can safely return the following morning between 8:00 AM and 10:00 AM
What Do St. John’s Homeowners Ask About Spray Foam Insulation?
Expert answers to the most common spray foam questions — covering costs, R-values, health safety, and rebate eligibility.
What R-value does my St. John’s home need for spray foam insulation?
Is open-cell or closed-cell spray foam better for St. John’s's climate?
How much can I save on Newfoundland Power bills with spray foam insulation in St. John’s?
How does spray foam prevent mold and moisture damage in St. John’s?
How long should I stay out of my St. John’s home after spray foam installation?
Why is spray foam insulation especially important for homes in St. John’s, Newfoundland?
WHAT ARE PEOPLE SAYING ABOUT GREENFOOT?
Our 5-star reviews speak for themselves!
"FIXED A LONG STANDING ISSUE I HAD FROM POOR INSTALLATION BY ANOTHER COMPANY!"
The two technicians Tanner and Halim were excellent, did a great job, very tidy, and identified 2 problems with my heat pump head, and fixed a long standing issue I had from poor installation by another company! Thank you very much, looking forward to using Greenfoot again.
Frederick TOFFLEMIRE - 5 Star Review
"I ONLY WISH THEY INSTALLED OUR HEAT PUMP ORIGINALLY"
Great company to deal with. We hired them to move an existing heat pump after the original installer refused to help us. The estimator and the installer were both very polite, careful and thorough. I only wish they installed our heat pump originally. I would hire them again without hesitation.
Ellen DOWNEY - 5 Star Review
"WHEN THEY LEFT THE HOUSE THERE WAS NO MESS TO CLEAN UP!"
The young chaps, Marlon Marcuflo and Sylvia Richard, were wonderful to deal with. They were extremely polite, very tidy and efficient in their work, were right on schedule and did an excellent job. When they left the house there was no mess to clean up. I would recommend Greenfoot Energy Solutions to anyone thinking of upgrading their home.
Alice GRACIE - 5 Star Review
"THEIR ENTIRE TEAM IS EXTREMELY EXPERIENCED, KNOWLEDGEABLE, AND CONSIDERATE"
We hired Greenfoot to install 2 heat pumps. From the beginning to end - initial home visit to the final installation touches - they were wonderful to work with. Their entire team is extremely experienced, knowledgeable, and considerate; and were very accommodating.
Michael BOYD - 5 Star Review
"OUR OLD HOUSE FEELS LIKE A BRAND NEW CONSTRUCTION"
The Greenfoot Team did amazing work in our home. Our old house (built in 1959) feels like a brand new construction thanks to the ductless heat pumps, spray foam insulation and HVAC installed by the friendliest staff! Everyone we spoke to from Greenfoot was helpful and just seemed genuinely happy in their job.
Happy Homeowner - 5 Star Review
"FIXED A LONG STANDING ISSUE I HAD FROM POOR INSTALLATION BY ANOTHER COMPANY!"
The two technicians Tanner and Halim were excellent, did a great job, very tidy, and identified 2 problems with my heat pump head, and fixed a long standing issue I had from poor installation by another company! Thank you very much, looking forward to using Greenfoot again.
Frederick TOFFLEMIRE - 5 Star Review
"I ONLY WISH THEY INSTALLED OUR HEAT PUMP ORIGINALLY"
Great company to deal with. We hired them to move an existing heat pump after the original installer refused to help us. The estimator and the installer were both very polite, careful and thorough. I only wish they installed our heat pump originally. I would hire them again without hesitation.
Ellen DOWNEY - 5 Star Review
"WHEN THEY LEFT THE HOUSE THERE WAS NO MESS TO CLEAN UP!"
The young chaps, Marlon Marcuflo and Sylvia Richard, were wonderful to deal with. They were extremely polite, very tidy and efficient in their work, were right on schedule and did an excellent job. When they left the house there was no mess to clean up. I would recommend Greenfoot Energy Solutions to anyone thinking of upgrading their home.
Alice GRACIE - 5 Star Review
"THEIR ENTIRE TEAM IS EXTREMELY EXPERIENCED, KNOWLEDGEABLE, AND CONSIDERATE"
We hired Greenfoot to install 2 heat pumps. From the beginning to end - initial home visit to the final installation touches - they were wonderful to work with. Their entire team is extremely experienced, knowledgeable, and considerate; and were very accommodating.
Michael BOYD - 5 Star Review
"OUR OLD HOUSE FEELS LIKE A BRAND NEW CONSTRUCTION"
The Greenfoot Team did amazing work in our home. Our old house (built in 1959) feels like a brand new construction thanks to the ductless heat pumps, spray foam insulation and HVAC installed by the friendliest staff! Everyone we spoke to from Greenfoot was helpful and just seemed genuinely happy in their job.
Happy Homeowner - 5 Star Review
What Other Services Are Available in St. John’s?
Explore our full range of energy efficiency solutions for St. John’s homeowners
Ready to Improve Your St. John’s Home's Insulation?
Join thousands of satisfied homeowners across Newfoundland. Schedule your free spray foam insulation assessment in St. John’s today.
Other Greenfoot Services in St. John’s
Which Spray Foam Is Right for Your St Johns Home?
There are two types of spray foam insulation — and the right choice depends on where it's being installed and the specific moisture challenges in St Johns. Here's what our local installers recommend.
Closed-Cell Spray Foam
St Johns's freeze-thaw cycles, coastal humidity, and Atlantic winters make closed-cell foam the preferred choice for most exterior applications. It acts as a combined insulator and vapour barrier — critical in Maritime climates where moisture in wall cavities leads to mould and rot.
- ✓ R-6 to R-6.5 per inch — highest R-value available
- ✓ Acts as a built-in vapour barrier — no separate poly required
- ✓ Adds structural rigidity to wall assemblies and rim joists
- ✓ Impervious to water — won't sag, settle, or absorb moisture over time
Open-Cell Spray Foam
Open-cell foam works well for interior walls, interior attic slopes, and any area in your St Johns home where air sealing matters more than vapour control. It's also the better choice for soundproofing between rooms.
- ✓ R-3.5 to R-4 per inch — excellent air sealing at lower cost
- ✓ Superior soundproofing between rooms and floors
- ✓ More affordable per board foot — suited for large interior areas
- ⚠ Not suitable for below-grade or exterior applications in St Johns
Not sure which type your St Johns home needs?
Our free home assessment determines the right foam type, thickness, and application areas — and we'll identify any provincial insulation rebates of up to $5,500 you qualify for. See available rebates →