How Spray Foam Helps Cut High Energy Bills Year-Round

Spray foam insulation creates a continuous air seal that reduces heat transfer, minimizes drafts, and limits energy loss through walls, roofs, and crawl spaces. This barrier prevents conditioned air from escaping and blocks outdoor temperatures from entering, resulting in significantly lower HVAC usage and consistent indoor comfort.

The insulation’s high R-value per inch and ability to expand into small gaps make it more effective than traditional insulation types in reducing year-round heating and cooling costs. According to the U.S. Department of Energy, heating and cooling account for 49% of energy use in an average home (source: energy.gov), making insulation upgrades one of the most impactful improvements for energy savings.

Armored Insulation applies spray foam across a wide range of building types and climates, particularly where seasonal extremes or poor building envelope conditions demand durable insulation solutions.

Key Benefits of Spray Foam Over Other Insulation Types

FeatureSpray Foam InsulationBlown-In InsulationFiberglass BattMineral Wool
Air SealingHigh (Expands to seal gaps)ModerateLowModerate
R-Value per Inch6.0–7.0 (Closed Cell)2.2–3.82.9–3.83.0–4.0
Moisture ResistanceHigh (Closed Cell)LowLowHigh
Mold ResistanceExcellentLowLowHigh
Durability20+ Years10–15 Years10–15 Years20+ Years
Performance in Humid RegionsExcellentLowLowGood

Bonus Tip: Closed cell spray foam adds structural reinforcement, which helps in areas with high wind load or seismic activity.

How Spray Foam Impacts Energy Efficiency

Spray foam forms a monolithic insulation layer, reducing heat movement through conduction, convection, and air leakage. It directly affects energy usage in both heating and cooling seasons:

  • In summer, it blocks heat gain from attic and wall cavities.
  • In winter, it prevents indoor warmth from escaping, reducing the load on heating systems.

The Oak Ridge National Laboratory found that spray foam can reduce HVAC energy consumption by up to 40% when properly installed (source: ORNL.gov).

Thermal and Air Barrier Performance Data

MetricClosed Cell Spray FoamOpen Cell Spray Foam
R-Value (per inch)6.0–7.03.5–3.7
Air Leakage ReductionUp to 90%Up to 80%
Vapor PermeabilityLowHigh
Water Absorption<1%5–10%
Best Application ZonesRoofs, Crawl Spaces, Exterior WallsInterior Walls, Ceilings

Bonus Tip: In regions with high humidity, closed cell foam is preferred for crawl spaces and attics to reduce mold growth and water vapor penetration.

Performance in Kentucky’s Climate

Kentucky’s climate ranges from humid summers to cold winters. These seasonal shifts make insulation performance critical. Spray foam offers:

  • Air barrier benefits in high humidity months
  • Thermal retention during freezing temperatures
  • Resistance to condensation and moisture-related degradation

Blown-in or batt insulation often struggles with moisture retention, leading to sagging or compression, reducing long-term performance.

Things to Think About Before Choosing Spray Foam

Before selecting spray foam insulation, consider the following:

  • Building Age and Air Leakage: Older structures with many penetrations benefit more from spray foam’s sealing properties.
  • Application Area: Closed cell works better in exterior walls and crawl spaces; open cell suits interior partitions.
  • Access for Installation: Tight crawl spaces or irregular framing may affect foam application.
  • Ventilation Needs: Proper ventilation must be assessed post-installation to avoid indoor air quality issues.
  • Local Regulations: Some municipalities require ignition barriers or specific fire-retardant coatings.

Bonus Tip: For retrofits, infrared thermal imaging before and after installation can help verify performance improvement.

Related Insulation Services Available from Armored Insulation

  • Spray Foam Insulation: High-efficiency solution for air sealing and thermal resistance across all seasons.
  • Crawl Space Insulation: Protects below-grade spaces from moisture intrusion and thermal loss.
  • Insulation Removal: Removes damaged or ineffective materials before installing spray foam.
  • Blown-In Wall Insulation: Supplemental fill for wall cavities, ideal for upgrades without full demolition.

Questions to Ask Before Installing Spray Foam

What parts of the home are losing the most energy?

Use an energy audit or blower door test to identify key leakage points before choosing insulation areas.

Can spray foam be added to existing insulation?

Yes, in many cases. It can act as an additional air seal over other materials when conditions allow.

Are there specific materials spray foam should not contact?

Avoid applying over wet surfaces or certain untreated metal panels prone to corrosion.

Will I need to vacate the property during installation?

Yes, typically for 24 hours due to off-gassing during curing. Confirm safety protocol with the installer.

Make an Informed Choice About Your Insulation

Spray foam insulation delivers measurable energy savings and improved building performance when used in the right context. Evaluate your home’s specific needs and compare insulation materials by performance and durability. Long-term efficiency gains often outweigh initial complexity or access considerations.

Contact Armored Insulation for Reliable Application Support

What to Know Long-Term About Spray Foam Use

How long does spray foam last?

Properly applied spray foam lasts over 20 years without significant degradation.

Does it require maintenance?

No ongoing maintenance is required. Periodic inspections can help identify damage from external causes.

Can pests damage spray foam?

Spray foam deters most pests, though rodents can burrow if access points are not sealed.

Is spray foam insulation fireproof?

It is not fireproof but can be treated with fire-retardant coatings per building code.

Can it reduce noise?

Open cell foam provides good sound dampening in interior walls.

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