Closed-Cell Spray Foam in Vaughan
Maximum R-Value, Moisture Barrier & Structural Strength
Closed-cell spray foam (2 lb foam) delivers R-6 to R-7 per inch—the highest R-value of any insulation material. It's waterproof, acts as a vapour barrier at 2" thickness, and adds structural rigidity to walls and roofs. The premium choice for Vaughan basements, garages, and moisture-prone areas.
Get a Free QuoteWhat Is Closed-Cell Spray Foam?
Closed-cell spray foam insulation (also called 2-pound foam or 2 lb SPF) is a high-density polyurethane foam where the cells are completely closed and packed tightly together. This structure gives it unique properties that open-cell foam can't match: water resistance, vapour barrier capability, and exceptional structural strength.
Closed-Cell Specifications
| Property | Value |
|---|---|
| R-Value | R-6.0 to R-7.0 per inch |
| Density | 1.75 - 2.25 lbs/ft³ |
| Vapour Permeance | <1 perm at 2" (Class II vapour retarder) |
| Water Absorption | <2% by volume |
| Compressive Strength | 25+ PSI |
| Air Barrier | Yes, at any thickness |
Benefits of Closed-Cell Spray Foam
Highest R-Value
R-6 to R-7 per inch means maximum insulation in minimal thickness—ideal for tight cavities.
Moisture Proof
Closed cells don't absorb water. Perfect for basements, crawl spaces, and flood-prone areas.
Vapour Barrier
At 2" thickness, acts as Class II vapour retarder—no additional poly required.
Structural Strength
Adds rigidity to walls and roofs. Increases racking strength up to 300%.
Best Applications for Closed-Cell in Vaughan
- Basement walls — Moisture resistance + thermal break on foundation
- Rim joists — Air sealing + vapour barrier at critical junction
- Garage ceilings — Prevents frost, condensation, and cold floors above
- Crawl spaces — Moisture-proof insulation in damp environments
- Exterior wall cavities — Maximum R-value in standard 2x4 or 2x6 walls
- Unvented roof assemblies — Cathedral ceilings and flat roofs
- Metal buildings — Condenses on steel without vapour barrier; closed-cell prevents this
Closed-Cell vs Open-Cell: Quick Comparison
| Factor | Closed-Cell | Open-Cell |
|---|---|---|
| R-Value per inch | R-6 to R-7 | R-3.6 to R-3.8 |
| Vapour Barrier | Yes (at 2") | No |
| Water Resistant | Yes | No |
| Cost | Higher | Lower |
| Best For | Basements, garages, exteriors | Attics, interior walls, sound |
Closed-Cell Spray Foam FAQ
What is closed-cell spray foam?
Closed-cell spray foam (also called 2-pound or 2 lb foam) is a rigid, high-density insulation with R-6 to R-7 per inch. The cells are completely closed, making it impervious to water and air. At 2 inches thickness, it acts as a vapour barrier.
When should I use closed-cell vs open-cell foam?
Use closed-cell for: basements, crawl spaces, garage ceilings, rim joists, exterior applications, and anywhere moisture resistance is critical. Use open-cell for: interior walls, attic floors, sound control, and where budget is a priority.
How much does closed-cell spray foam cost in Vaughan?
Closed-cell spray foam in Vaughan costs $3.00 to $5.50 per square foot at 2 inches thickness, or $1.50 to $2.75 per board foot. The exact price depends on project size, access, and total coverage area.
Does closed-cell spray foam add structural strength?
Yes. Closed-cell foam has a compressive strength of 25+ PSI when cured, which adds rigidity to walls and roof assemblies. It can increase racking strength of wall assemblies by up to 300%.
Get Your Closed-Cell Spray Foam Quote
Premium insulation for Vaughan basements, garages, and moisture-prone areas.
Request Free Quote Call (647) 613-3626