Safer Alternatives to Spray Foam Insulation (That Still Perform Well)
By Graham Mann | Published: 11/19/2025
Explore safer, eco-friendly alternatives to spray foam insulation that provide effective thermal performance without harmful chemicals.
Safer Alternatives to Spray Foam Insulation (That Still Perform Well) Spray foam insulation is effective but comes with health and environmental concerns, like releasing VOCs and being petroleum-based. Luckily, there are safer options that provide strong insulation without these drawbacks. Here are four alternatives to consider: - Cellulose: Made from recycled paper, offers R-values of 3.1–3.8 per inch, is non-toxic, and eco-friendly. - Mineral Wool: Derived from rock or slag, has an R-value of 4.2 per inch, resists mold and fire, and contains recycled content. - Cork: Harvested from oak bark, provides R-values of around 4 per inch, is moisture-resistant, fire-resistant, non-toxic, and sustainable. - Sheep’s Wool and Hemp: Natural fibers with R-values of 3.7–4.3 per inch, renewable, biodegradable, and regulate indoor humidity. These materials are safer for DIY installation, reduce environmental impact, and balance performance with sustainability. Proper installation and air sealing are...
← Back to all articles