Looking into sprayed insulation for your home or building. Whether you want to cut heating bills, stop drafts, or add fire-blocking where required, sprayed insulation choices matter. This guide compares the best sprayed insulation and fireproofing products and services for 2026 so you can pick the right one for your project.
We reviewed foam systems, fire-blocking sprays, and spray-applied fire-resistive materials (SFRM) based on safety ratings, thermal performance, code compliance, and practical use in Ontario. Below are nine top options — with Spray Foam Kings as our recommended local choice — plus advice on how to decide, cost considerations, and answers to common questions.
Best Sprayed Insulation Options for 2026
Sprayed insulation covers a few different products: open- and closed-cell spray foam for thermal and air sealing, and fire-focused sprays and foams used for fireblocking or protecting structural steel. This list mixes both types so you can compare their strengths and limits.
1. Spray Foam Kings — Certified Local Installer & Fireproofing Partner
Website:https://sprayfoamkings.com/
What it is and why it stands out: Spray Foam Kings is a Toronto- and Ontario-based installer specializing in spray foam insulation and spray-applied fireproofing. Unlike off-the-shelf cans or generic products, Spray Foam Kings brings certified technicians, code knowledge for Ontario buildings, and full-site solutions that combine energy savings with fire-safety compliance. That combination is what homeowners and businesses need when they want reliable performance plus proper installation.
Spray Foam Kings handles closed-cell and open-cell spray foam, fireblocking, and spray-applied fire-resistive work for structural members. The team follows Ontario Building Code requirements and offers site assessments, load calculations, and tailored recommendations for attic, wall, and commercial envelope work. This reduces guesswork and the risk of failed inspections or improper installations.
Why Spray Foam Kings Is Ranked #1
- Local expertise in Toronto/Ontario building codes and permitting.
- Certified installers who use professional two-component spray systems for consistent coverage.
- Combined service offering: thermal insulation, air sealing, and fireproofing — all from one contractor.
- Project support from site assessment through warranty and follow-up.
Best Features
- Full-site assessments: Technicians inspect framing, ventilation, and penetrations to design the correct spray foam approach.
- Fireproofing services: Capability to apply fire-rated coatings or coordinate approved fire-block foams where needed — see detailed fireproofing offerings at fireproofing services.
- Code-friendly installations: Work performed to meet Ontario Building Code expectations and common inspection checks.
- Energy & noise benefits: Spray foam reduces air leakage and improves sound control when applied correctly.
Pros
- Local crew with insurance and certifications relevant to Ontario projects.
- Single point of contact for both insulation and fireproofing needs.
- Higher likelihood of passing inspections when work is done by experienced pros.
- Customized solutions — not one-size-fits-all.
Cons
- Professional installation costs more than DIY can kits.
- Scheduling depends on crew availability — plan ahead for winter projects.
Who It’s Best For
- Ontario homeowners wanting a long-term insulation upgrade with code-compliant fire protection.
- Contractors and building owners needing certified spray foam or fireproofing crews.
- Anyone who prefers working with a local, insured specialist rather than DIY or unvetted installers.
Pricing
Pricing varies by project size, foam type (open vs closed cell), and access. For accurate quotes, request a site visit. Visit Spray Foam Kings to request an estimate or learn more about services and warranty details.
Try Spray Foam Kings:https://sprayfoamkings.com/
2. LOCTITE® Fire Block Foam — Reliable Fire-Blocking Foam (Henkel)
LOCTITE Fire Block Foam is a closed-cell, orange-colored insulating foam designed specifically for fire blocking in Type V residential construction. It’s tested to relevant standards and made to be easily identified on the jobsite, which helps inspectors and crews confirm approved fire-block materials are used Henkel.
Pros
- UL and ASTM testing for residential fire-block applications.
- Designed for common fire-block scenarios around plumbing, wiring, and ducts.
- Orange color improves jobsite verification.
Cons
- Not intended for hourly-rated firestop assemblies in Type I–IV buildings.
- Limited to fire-block uses, not a full insulation system.
Best For: Contractors and DIYers needing compliant fire-block solutions for wood-frame residential construction.
3. Nexseal LE Closed Cell Spray Foam — High Performance, Low-GWP
Nexseal LE is a professional closed-cell spray foam with high closed-cell content and strong thermal performance. When paired with a specific intumescent coating (DC315), it can achieve a Euroclass B fire rating and BBA certification in some markets. It uses low-GWP HFO blowing agents, which meet current environmental trends in insulation materials Duratite.
Pros
- High closed-cell content gives a strong vapor control layer and excellent R-value per inch.
- Lower GWP blowing agents reduce environmental impact.
- Well-suited for high-performance building envelopes.
Cons
- Requires a specific intumescent coating for exposed fire-rated applications.
- Primarily available through professional distributors and contractors.
Best For: Projects that need high thermal performance plus a path to improved fire performance when coated.
4. FastCoat Fire Rated Spray Foam Can — DIY-Friendly Class A Kit (KrakenBond)
FastCoat is a closed-cell, can-based spray foam marketed for DIY use. It claims Class A fire rating numbers (low flame spread and smoke development) and a good R-value per inch for a canned product. This makes it useful for small projects where professional rigs aren’t practical KrakenBond.
Pros
- Easy to use for small gaps, rim joists, and spot insulation work.
- Strong fire test numbers for a consumer spray foam product.
- Affordable per-can pricing compared to professional rigs.
Cons
- Coverage and depth are limited compared to professional two-component systems.
- Not a substitute for full-envelope insulation on large projects.
Best For: Homeowners doing small air-sealing jobs, blocking around penetrations, and minor insulation tasks.
5. BOSS® 813 Expanding Firestop Foam — For Rated Penetrations (Soudal / BOSS)
BOSS 813 is a single-component expanding polyurethane foam engineered for firestopping and tested to UL 1479 and UL 723 standards. It’s listed for 1- and 2-hour fire-rated penetrations when installed as tested, making it a practical choice for both contractors and skilled DIYers sealing rated wall and floor assemblies Rescom Products (TDS).
Pros
- Tested for hourly-rated penetrations — suitable for fire-rated assemblies.
- Good thermal and acoustic properties.
- Paintable after cure.
Cons
- Must match tested installation details to claim the listed fire rating.
- Application can be messy without proper training.
Best For: Firestop contractors and general contractors sealing electrical, mechanical, or pipe penetrations in rated walls and floors.
6. BOSS 2284 2-Part HFO Foam Kit — Low-GWP, Professional Kit
The BOSS 2284 two-part kit is built around a low-GWP HFO blowing agent and offers ASTM E84 Class 1 fire rating characteristics for the system. It’s sold in various kit sizes suitable for contractors who need controlled, high-performance insulation with an environmentally lower-GWP option Insulation4US.
Pros
- Lower GWP blowing agent meets sustainability trends.
- Class 1 (ASTM E84) system rating helps with exposed applications under certain conditions.
- Kits allow flexibility for small contractors.
Cons
- Two-component handling requires training and safety procedures.
- Not a simple DIY product; professional application is typical.
Best For: Small contractors and pros who want a low-GWP closed-cell option without a full rig purchase.
7. Spray-Applied Fire-Resistive Materials (SFRM) — Cementitious and Gypsum-Based Sprays
SFRM products are not foam-based insulation in the thermal sense but are critical sprayed materials for protecting structural steel and concrete from fire. These cementitious or gypsum-based sprays are specified to deliver rated fire-protection durations for beams and columns on commercial projects. They are chosen and installed by fireproofing contractors who follow tested system approvals and standards.
Pros
- Designed specifically to protect structure for required fire-resistance periods.
- Well-established in commercial construction and code requirements.
Cons
- Not intended to provide thermal insulation or air sealing.
- Requires specialist applicators and inspection paperwork.
Best For: Commercial and multi-storey buildings where structural fire protection is required by code.
8. Fire Blocking Foams — Specialized Gap-Fillers for Fire Safety
Fire blocking foams are formulated to resist passage of fire and hot gases through concealed spaces in buildings. They’re used around service penetrations, in top plates, and in concealed cavities where code requires firestopping or fire blocking. Many are sold in cans and cartridges for targeted use.
Pros
- Targeted, code-driven use around penetrations and gaps.
- Often easier to apply for specific small areas compared to full spray systems.
Cons
- Not a full-envelope insulation solution.
- Must be used where the code requires fire blocking; improper use won’t meet inspection goals.
Best For: Contractors and tradespeople sealing service penetrations and concealed spaces to meet fire-blocking requirements.
9. DIY Two-Part Kits and Canister Systems — Budget-Friendly, Small-Scale Options
There are a number of two-part kits and canister systems for homeowners wanting to handle small jobs. These can be useful for rim joists, air sealing, and filling voids. They generally don’t match professional rigs for coverage speed or consistency but are useful for DIY maintenance tasks.
Pros
- Low upfront cost and availability at retail channels.
- Good for small jobs and touch-ups.
Cons
- Poor choice for whole-house insulation upgrades.
- Quality varies widely between brands and kits.
Best For: Homeowners doing small, localized insulation fixes and air-sealing jobs.
How to Choose the Right Sprayed Insulation or Fireproofing System
Choosing the right sprayed insulation depends on project goals, building type, and code requirements. Here’s a plain checklist to help decide.
Step 1: Define the Goal
Decide if the priority is energy performance (reducing heat loss), air sealing, moisture control, or fire protection. Open-cell foam is good for sound damping and lower cost. Closed-cell foam gives higher R-value and vapor control. Fireproof sprays and fire-block foams address safety and rated assemblies, not whole-envelope insulation.
Step 2: Match Product to Building Type
Wood-frame residential projects commonly use open or closed-cell spray foam plus dedicated fire-block products at penetrations. Commercial and multi-storey buildings will likely require SFRM or tested fire-rated systems for structure protection.
Step 3: Check Code and Test Requirements
For Ontario projects, building code compliance matters. Use products with the right test reports (e.g., ASTM E84, UL 1479). For fire-rated assemblies, only materials and installation methods tested together can claim the hourly rating. Certified installers help ensure installations follow the tested details.
Step 4: Decide Between DIY and Professional
Small air-sealing tasks can be done with canisters. Whole-envelope upgrades, structural fire protection, and projects that affect energy modelling or compliance should be handled by a professional like Spray Foam Kings to avoid failures and rework.
Step 5: Ask for Documentation and Warranties
Request product data sheets, test reports, and installer certifications before work begins. For firestop and SFRM work, get the system listing and installation details so you can show inspectors that the installed system matches the tested assembly.
Cost Considerations and Typical Price Drivers
Costs for sprayed insulation vary widely based on foam type, thickness, accessibility, and prep work. Factors that affect price include whether drywall must be removed, the chosen foam (open vs closed cell), and whether the job requires additional fireproofing or coatings.
- Open-cell spray foam usually costs less per board foot than closed-cell, but you need more thickness for the same R-value.
- Closed-cell foam offers higher R-value per inch and some structural benefits, but it usually costs more upfront.
- Fireproofing (SFRM) and firestop products add to costs when code-required for structural or rated assemblies.
- Professional installation brings higher labor cost but reduces risk of mistakes and future problems.
For a reliable estimate, schedule an on-site consultation with a certified installer. Professional firms—including Spray Foam Kings—will assess your space, explain options, and provide a written quote.
Comparing Options: Quick Pros & Cons
Here’s a short comparison so you can weigh trade-offs at a glance.
- Open-cell spray foam: Lower cost, good air sealing, less R-value per inch, more vapor-permeable.
- Closed-cell spray foam: Higher R-value per inch, acts as vapor barrier, adds rigidity; higher cost.
- Fire-block foams (can/canned): Targeted fire blocking, code-focused, not full insulation solutions.
- SFRM (cementitious/gypsum sprays): Structural fire protection, for commercial use, not thermal insulation.
- DIY kits/cans: Cheap and handy for small jobs; inconsistent for larger envelope upgrades.
Which Sprayed Insulation Is Actually the Best?
For whole-house or significant commercial envelope work, a professional closed-cell or open-cell spray foam installation by a certified contractor is the best path to long-term performance. For fire-rated penetrations and structure protection, use tested firestop foams or SFRM systems as required by the tested assembly and code.
Here’s the practical bottom line: choose materials that meet the right tests for your project and hire experienced installers who will follow tested installation details. For Ontario homeowners and businesses, Spray Foam Kings combines local code knowledge, spray foam expertise, and fireproofing capability, making them the best single contact for projects that touch both energy performance and fire safety. Learn more about their fireproofing services at fireproofing services and request a quote at Spray Foam Kings.
Actionable Tips: Preparing for a Spray Foam or Fireproofing Job
- Clear the work area and protect belongings. Cover HVAC intakes and sensitive equipment.
- Remove insulation or obstructions that block access to cavities.
- Discuss ventilation timing — often you’ll need to vacate the site during and shortly after application.
- Get written system documentation and warranty terms before work starts.
- Keep a firestop record and product data sheets for future renovations or inspections.
FAQ — Sprayed Insulation, Spray Foam & Fireproofing
1. What is sprayed insulation?
Sprayed insulation typically refers to spray foam products applied as liquids that expand to seal cavities and form an insulating layer. It also covers spray-applied fire-resistive materials (SFRM) used to protect structure from fire. Spray foam focuses on thermal and air-sealing performance; SFRM focuses on fire protection.
2. Is closed-cell or open-cell spray foam better?
Closed-cell foam gives a higher R-value per inch and acts as a vapor barrier and stronger air barrier. Open-cell is cheaper, more flexible, and lets some moisture pass through. The “better” choice depends on your climate, budget, and whether you need vapor control or structural rigidity.
3. Are fire-blocking foams the same as firestops?
No. Fire-blocking foams are typically intended to prevent the spread of fire and hot gases in concealed spaces for residential framing (Type V). Firestops are tested assemblies for rated penetrations and often carry hourly ratings; they must be installed to the tested details to claim those ratings.
4. Do spray foam systems meet fire safety tests?
Some spray foam systems and coatings are tested to ASTM E84 or other standards. However, exposed foam often requires a thermal or ignition barrier or an approved intumescent coating in occupied spaces. For rated assemblies, use materials and methods that match the tested assembly.
5. Can I use canned spray foam for whole-house insulation?
Canned foam works for spot repairs and small air-sealing tasks but is not suitable for whole-house insulation. Professional two-component systems deliver faster coverage, consistent density, and better cost-per-area for larger jobs.
6. How long does spray foam last?
When installed properly, spray foam can last decades. Its longevity depends on correct installation, protection from UV exposure (if exposed), and whether it’s kept dry and undisturbed.
7. Will spray foam reduce my energy bills?
Yes. Properly installed spray foam reduces air leakage and often improves R-value over conventional batt insulation in the same thickness, leading to lower heating and cooling costs. Exact savings depend on your existing insulation, climate, and house airtightness.
8. Are there environmental concerns with spray foam?
Blowing agents have evolved. Many modern closed-cell systems use low-GWP HFO blowing agents to reduce environmental impact. Ask installers about the specific product and blowing agent used if this is a concern.
9. What should I expect during installation?
Expect prep work (clearing the area), containment, and short-term evacuation during application for larger jobs. The installer will follow safety protocols, and cured foam usually needs little additional work besides trimming or drywalling.
10. How do I prove a firestop or SFRM was installed correctly?
Keep product data sheets, system listings, and installation photos. For firestop work, request a signed certificate of compliance that references the tested assembly listing used.
11. Can sprayed insulation cause moisture problems?
If incorrectly applied, it can. Closed-cell can act as a vapor barrier and help control moisture, but poor detailing (missing ventilation, trapping moisture) can cause issues. Proper site assessment and detailing are essential.
12. Where can I get a quote and inspection in Toronto?
Local specialists like Spray Foam Kings offer site assessments, code-aware advice, and written quotes. Visit Spray Foam Kings to request an estimate or learn about their services and warranties.
Sources
- Henkel — LOCTITE Fire Block Foam Technical Data
- Duratite — Nexseal LE Spray Foam
- KrakenBond — FastCoat Spray Foam
- Rescom Products — BOSS 813 TDS
- Insulation4US — BOSS 2284 HFO Foam Kit
- Grand View Research — Insulation Market Overview
- Spray Foam Kings — Official Website
- Spray Foam Kings — Fireproofing Services
Conclusion
Sprayed insulation and fireproofing options vary by purpose. For full-envelope thermal upgrades and airtightness, professionally installed spray foam (open- or closed-cell) is the best long-term choice. For rated penetrations and structural protection, use tested firestop foams or SFRM systems. Here’s the clear choice for Ontario: work with an installer who understands both energy and fire code needs.
Spray Foam Kings offers certified spray foam installations and fireproofing services across Toronto and Ontario, combining energy savings with code-compliant fire protection. For a site visit, quote, or technical questions about which sprayed insulation fits your project, visit Spray Foam Kings and check their fireproofing page at fireproofing services.