Is Spray Foam Insulation Toxic? What You Need to Know

At Complete Insulation, one of the most common concerns we hear from customers is, “Is spray foam insulation toxic?” It’s a fair question, after all, you’re trusting a product to go into the very walls and ceilings of your home or business. Fortunately, spray foam insulation is safe when properly installed. But like any building material, it’s important to understand both the benefits and potential drawbacks.

Let’s clear up the confusion and take a closer look at what spray foam is made of, how it works, and what to consider before having it installed.

Understanding Spray Foam: What’s It Made Of?

Spray foam insulation is a two-component mixture made of isocyanate and polyol resin. When these chemicals combine, they rapidly expand and cure into a durable, energy-efficient insulation barrier. The result is either open cell or closed cell foam insulation, both of which are widely used in homes and commercial buildings across the country.

Since the installation process does involve a momentary chemical reaction, we require

the premises to be vacated during the installation. We have an established re-occupancy guideline for our staff, contractor, homeowner, etc. to follow. After a proper installation and curing, spray polyurethane foam does not outgas toxic chemicals.

That’s why it’s a trusted solution for everything from new builds to retrofits.

Spray Foam Safety: It’s All in the Application

So, is spray foam insulation toxic? Not when installed correctly by trained professionals.

At Complete Insulation, our certified team follows rigorous safety standards. We use personal protective equipment (PPE), ventilate workspaces, and take every precaution to ensure safe and effective installation. Once cured spray foam is inert and non-toxic. The key is hiring a knowledgeable crew that understands the chemistry and equipment involved.

Are There Downsides to Spray Foam Insulation?

Like any product, spray foam insulation comes with both pros and cons. It’s known for its superior energy efficiency, air sealing capabilities, and long-lasting performance—but it’s important to understand the full picture.

Let’s address a few common questions and concerns:

Is There a Downside to Spray Foam Insulation?

One potential downside is the upfront cost. Spray foam insulation can be more expensive than traditional fiberglass or cellulose. However, it often pays for itself over time through lower energy bills and reduced HVAC strain.

Spray Foam Insulation in Attics

Attics are a common place to install spray foam, but not all attic foam applications are created equal. Spray foam insulation roof problems can occur if the foam is applied incorrectly or without proper ventilation planning. Some homeowners wonder, “Should I spray foam my attic roof?” The answer depends on your attic’s design and intended use. Our team can help assess whether spray foam attic insulation is right for you.

Open Cell Foam Insulation Problems

Open cell foam is great for interior walls and soundproofing, but it’s more vapor-permeable than closed cell foam. In very humid environments or where moisture control is critical, open cell foam may not be the best choice. Understanding the right type of foam for your space is crucial to avoid long-term issues.

Addressing Other Concerns: Disadvantages of Spray Foam

Some other potential spray foam insulation issues include:

• Difficulty removing once installed.
• Expansion risks if applied in tight spaces without care.
• Need for experienced installers to avoid improper curing.

In rare cases, foam insulation problems arise from off-ratio mixing or poor workmanship. That’s why hiring the right insulation contractor makes all the difference. At Complete Insulation, we’ve built our reputation on precision, safety, and long-term results.

The Final Verdict: Is Spray Foam Right for You?

If you’re asking, “Can I spray foam my attic?” or “What are the negatives of spray foam?”, you’re not alone. The truth is, most spray foam disadvantages come down to poor installation or misapplication—not the material itself.

With Complete Insulation, you’re getting a team that knows how to maximize the benefits and the know how to properly install spray foam insulation. Whether you’re insulating a crawl space, walls, or considering attic foam insulation, we’ll help you make an informed decision.

Ready for Safer, Smarter Insulation?

Don’t let misinformation stop you from making a smart upgrade. Contact Complete Insulation today to schedule a free spray foam inspection and estimate. Let us show you how our professional team can make your home or business more comfortable, efficient, and healthier with spray foam done right.