With energy and utility prices on the rise nationwide, homeowners may be considering ways to keep their homes cool or warm.
According to the Environmental Protection Agency, sealing homes with tactics such as additional insulation could cut heating and cooling costs by an average of 15%.
Freedonia points to insulation demands trending up in the past decade in a 2025 report on the insulation market in North America, writing that, “Demand for spray foam insulation is rising in the building market due to its superior air sealing capabilities, thermal resistance and moisture control.”
Lane Pace, a building science specialist serving homeowners across Louisiana, Mississippi, Alabama and Texas, offers advice for homeowners considering spray foam insulation. Here are 10 questions Pace says homeowners should ask before and while working with a spray foam insulation contractor.
Questions to Ask When Vetting Spray Foam Contractors
Not every spray foam contractor operates at the same standard. Asking some questions upfront can help homeowners identify contractors qualified for a specific job.
1. Are Installers Trained and Certified?
Spray foam installation is a technical process that requires proper training. Ask whether the installers themselves are certified.
Examples of credentials to look for:
- SPFA (Spray Polyurethane Foam Alliance) certification
- BPI (Building Performance Institute) certification
- OSHA safety training
- ICC (International Code Council) certification
- Manufacturer-specific training credentials
2. Do You Have Experience in this Climate and Region?
The right spray foam specifications depend heavily on local climate conditions, building codes and common construction methods in the area. A contractor with regional experience should understand how factors like humidity levels, temperature swings and moisture exposure affect insulation performance.
For example, Pace’s team in and around New Orleans is intimately familiar with how humidity and moisture impact spray foam insulation needs and home comfort in the area. “People often think humidity is just a climate issue,” Pace says. But he points out that how a building is sealed and insulated impacts how outside moisture changes indoor comfort and functionality.
3. What Type of Social Proof Do You Have?
In a technical field where installation quality can be difficult for the average homeowner to evaluate on the spot, social proof carries extra weight. Reviews, testimonials and referrals from past customers can offer a clearer picture of how a contractor actually performs on the job and whether insulation results are lasting.
4. Do You Offer a Warranty on Work?
Spray foam insulation is a long-term investment, and even high-quality materials can underperform if the installation isn’t done correctly.
A contractor’s warranty covers labor and workmanship; if something goes wrong because the foam was applied incorrectly, the contractor is responsible for making it right. This is separate from any warranty the manufacturer offers on the product itself, which will be covered later.
Questions to Ask When Working With a Spray Foam Contractor
Once homeowners vet a contractor and start working with them, questions shift to material choice and why something may be right for a specific use.
5. What Type of Warranty Does the Manufacturer Offer?
Manufacturer warranties cover the spray foam product itself, offering homeowners protection should the material fail to perform as intended. Warranties might cover:
- Inappropriate adhesion that doesn’t seal the home as expected
- Thermal resistant issues that reduce insulative performance
- Lack of moisture control in a product that’s supposed to offer that benefit
Manufacturer warranties vary, so homeowners should understand what’s covered, for how long and under what conditions.
6. Is the Material Low VOC?
VOCs, or volatile organic compounds, are chemicals that can be released into the air during and after spray foam installation. Some spray foam products are formulated to be low-VOC to reduce off-gassing.
Homeowners should ask about VOCs upfront if they’re concerned, especially if someone in the household has sensitivities or if spray foam is being installed in spaces with limited ventilation. Reputable contractors can typically provide product data sheets that specify VOC content.
7. Does the Foam Meet Local Code?
Spray foam installation is subject to building codes at the state and local level, and those requirements aren’t uniform across the country. R-value minimums, thermal barrier requirements and fire safety standards can vary.
Qualified contractors should be familiar with the codes specific to the area and be able to confirm that the materials and installation methods they use meet those requirements.
8. What’s the R-Value and What Does That Mean?
R-value is a measure of how well insulation resists heat flow. The higher the number, the better the material is at keeping heat where it belongs.
In practical terms, that means a higher R-value helps keep conditioned air inside the home in summer and prevents heat loss in winter. For spray foam specifically, R-value varies depending on the type of foam used, how thick it’s applied and where it’s installed.
For example, closed-cell foam generally delivers a higher R-value per inch than open-cell, which is one reason it’s commonly recommended for hot-humid climates where moisture control and thermal performance both matter.
Homeowners should ask about the R-values of products and what they mean for insulation in their specific homes.
9. Does the Foam Put Electrical Wiring, Pipes or Other Fixtures at Risk?
Spray foam is generally safe around most home systems. However, certain fixtures, like recessed lighting, may require air circulation for cooling. Too solid a foam seal can restrict that airflow.
Some foam formulations can also interact with pipe materials or coatings over time. A reputable contractor can walk through the home’s existing systems before installation to flag anything that requires special attention or protection.
10. What Should I Know About Maintaining Foam Insulation Going Forward?
Spray foam is low-maintenance relative to other insulation types, but that doesn’t mean it’s completely set-and-forget. Asking a contractor upfront about what to monitor over time helps homeowners know what to watch for and when to call someone back in.
Before installation is complete, talk to your contractor about:
- Periodic visual inspections. When should you check exposed foam in attics, crawl spaces and basements for signs of gaps, shrinkage or damage?
- Moisture and ventilation monitoring. How can you track this in enclosed spaces where humidity can accumulate over time?
- Professional check-ins. Should you have anyone inspect your insulation every few years?
