Spray foam insulation outperforms traditional insulation methods by providing a continuous air barrier and high thermal resistance. Its ability to seal gaps, prevent moisture infiltration, and deliver long-term R-value stability makes it a leading solution for energy efficiency.
Both open and closed cell spray foam types resist air leakage and maintain performance across a wide range of temperatures. In hot and humid climates like Central Texas, this minimizes the burden on HVAC systems and reduces utility costs year-round.
This article breaks down the technical, practical, and regional performance factors that position spray foam insulation at the top for energy efficiency. Insights provided are based on field application knowledge and direct installer feedback.
Spray foam insulation expands on contact, sealing cracks and penetrations. This reduces air exchange between conditioned and unconditioned spaces, lowering energy loss.
Closed cell foam delivers an R-value of approximately 6.5 to 7 per inch, outperforming fiberglass and cellulose. Even open cell foam offers better performance at lower thicknesses.
Closed cell foam acts as a vapor barrier. It limits condensation and helps maintain structural integrity in humid environments.
Spray foam does not settle or degrade over time, maintaining its insulating value for decades without the need for topping up.
| Insulation Type | R-Value (per inch) | Air Barrier | Vapor Barrier | Water Resistance | Application Method |
|---|---|---|---|---|---|
| Open Cell Spray Foam | ~3.5–4.0 | Yes | No | Low | Spray Applied |
| Closed Cell Spray Foam | ~6.5–7.0 | Yes | Yes | High | Spray Applied |
| Fiberglass Batts | ~2.9–3.8 | No | No | Low | Stapled Between Studs |
| Cellulose (Blown-In) | ~3.2–3.8 | Partial | No | Low | Blown Into Cavities |
| Fiberglass Blown-In | ~2.2–2.7 | No | No | Low | Blown Into Attic Spaces |
Spray foam’s airtight seal keeps hot, humid outdoor air from infiltrating living spaces. This is crucial in Central Texas, where average summer highs exceed 95°F and humidity often surpasses 70%.
By reducing heat gain, spray foam allows HVAC systems to operate more efficiently. In retrofit projects, H&R Insulation has seen cooling loads drop by up to 30%.
Closed cell foam adds rigidity and structural strength, making it ideal for older homes with variable framing integrity.
Bonus Tip: Avoid applying open cell foam in crawl spaces without a proper vapor barrier. Moisture buildup can lead to microbial growth over time.
Bonus Tip: Always verify the installed foam meets ICC-ES or local code standards for fire and thermal protection.
Closed cell foam is better for radiant heat resistance and vapor control.
No. Existing insulation must be removed to allow proper adhesion and coverage.
Most residential jobs are completed within one day, depending on square footage and prep work.
No. Occupants must vacate the home for 24 hours post-installation to allow curing and ventilation.
For more information about choosing the right insulation for your home or business, speak with experienced installers who understand regional climate challenges and building standards.
H&R Insulation Phone: (512) 862-9637 Email: [email protected]
No. It doesn’t provide nesting material or food sources for rodents or insects.
It retains performance for 30 years or more without settling or deteriorating.
Open cell foam provides significant sound dampening between interior spaces.
None under normal conditions. Damage or degradation usually results from physical tampering or moisture issues.
Yes, when combined with a thermal barrier coating where required.
ES