Closed Cell Spray Foam Insulation – All You Need to Know

Ever feel like your heating or cooling system is working overtime, yet your rooms don’t feel comfortable? Maybe the issue is with your roofing, and you need to contact an expert to get it checked and see if you need help with making your roof more insulated to beat the summer heat.

If you’re noticing uneven temperatures, rising energy bills, or drafty spots in your home, it might be time to rethink your insulation. And when it comes to long-lasting insulation solutions, closed-cell spray foam is the best one. But is it the right fit for your residential or commercial building? Only an expert in residential and commercial roofing can tell you that after a close inspection. 

As one of the most trusted roofing companies, we will answer all your questions about Closed-Cell Spray Foam.

What is a Closed-Cell Spray Foam?

Closed-cell spray foam is prepared by mixing two liquids – isocyanate and polyol resin. When they combine, the mixture quickly expands and hardens into a solid foam.

This fast reaction helps it stick well to surfaces like wood, metal, or brick, forming a strong, airtight seal.

Closed-cell spray polyurethane foam (SPF) has a high R-value. It is low-expanding, spray-applied plastic that creates an air seal wherever it is installed. The air pockets of closed-cell insulation are clustered tightly together, resulting in a denser structure.

It also prevents air leakage and maintains a consistent temperature throughout the structure because of its air-sealing qualities.

Ready to upgrade with spray foam? Call us today!

What Are the Key Benefits of Closed-Cell Spray Foam? 

• Superior R-Value

Closed-cell spray foam has a high R-value of around R-6 to R-7 per inch, making it one of the most effective insulators.

• Energy Saver

Closed-cell foam is energy efficient since it effectively seals nooks and crevices. It saves up to 50% or more on average in energy costs.

• Mold Deterrent

Mold and mildew have no chance in the insulation because the closed-cell foam does not support or promote their growth.

• Moisture Barrier

The cells are completely closed and don’t hold water. So, water and moisture can’t seep through. It works great in crawl spaces, basements, or any area prone to dampness.

• Air Sealing

Most energy loss in homes happens through air leaks, and you may not even see them. Closed-cell spray foam locks air out and comfort in.

• Long Life Expectancy

Spray foam insulation has a longer lifespan because of the properties of the materials used in it. It doesn’t sag, settle, or degrade like fiberglass. You don’t have to change the insulation for years, as it can last for decades.

• Improves Air Quality

By sealing up all the little cracks and gaps, closed-cell spray foam can keep out dust, pollen, and other stuff you don’t want floating around your home. This will improve the air quality inside your home.

Because of its dense structure, it doesn’t absorb sound like open-cell foam or mineral wool. If sound control is your top concern, consider mixing insulation types.

Note– Closed-cell spray foam is a powerful insulation solution, but only when installed by a professional and experienced roofing company. They’ll help you understand how to use it properly and protect you from future issues like poor performance or damage.

Busting the Biggest Misconceptions About Closed-Cell Spray Foam

You must have probably heard a lot about closed-cell spray foam, and some of it may have created doubts in your mind. Let’s bust a few common myths about it.

Myth	Fact
Closed-cell foam makes your house too airtight	Every home needs ventilation, and when paired with mechanical ventilation, closed-cell foam can actually improve indoor air quality.
It supports the structure of your home.	While it adds rigidity, it’s not a structural material.
It’s waterproof	It’s highly moisture-resistant, not waterproof. You still need to fix leaks or drainage issues.

 

Need Help Choosing the Right Spray Foam Insulation? Contact Us Today!

What’s the Difference Between a Closed-Cell and Open-Cell Foam?

Both forms have their importance, and both are good for roof insulation. But picking the right one can feel a bit confusing. So, here’s a quick and simple comparison to help you decide what might be the best for your home.

Feature	Closed Cell Foam	Open Cell Foam
Density	High (rigid and strong)	Low (soft and flexible)
R-Value	Around 6.5 to 7	Around 3.5 to 4
Water Resistance	Excellent – works as a moisture barrier	Poor – absorbs water
Soundproofing	Not great	Very good
Cost	More expensive	More budget-friendly
Best For	Basements, crawl spaces, attics, exteriors	Interior walls, sound-sensitive areas
Adds Strength to Walls	Yes	No
Flood Resistant	Yes	No

Some Common Questions That People Ask About the Closed-Cell Spray Foam

1. How long does it last?

The closed-cell spray foam insulation is highly durable and can last for over 30 years. It doesn’t break down like traditional insulation.

2. Is Closed-Cell Foam Worth the Money?

Absolutely. While upfront costs may seem higher, the long-term savings are real –

• Lower utility bills
• Fewer repairs from moisture or mold damage
• Longer-lasting HVAC system
• Better home value and comfort

3. Can I install it myself?

No, it requires expert tools, training, and safety gear. DIY can result in costly mistakes.

4. Will it help in extreme weather?

Yes. It performs well in both very hot and cold climates by reducing air infiltration and moisture problems.

Takeaway

Closed-cell foam Insulation is a long-term, profitable investment. It seals all cracks and gaps in your home or building. Also, it is one of the best ways to improve your roof’s efficiency and helps in lowering your home’s energy bill.

If you want to bring great value to your home or commercial building, connecting with an expert roofing contractor can help.
Read More About:

• Benefits of Spray Foam Insulation
• The Role of Spray Foam Roofing in Preventing Roof Leaks and Damage
• Winter Roof Prep: How Spray Foam Insulation Protects Your Home
• Spray Foam vs. Traditional Roofing: Benefits for Commercial Properties

Upgrade Your Roof Insulation Today With Foam Experts – The #1 Roofing Contractor in Redding

Foam Experts is the most trusted roofing company in Redding, providing commercial and residential roofing solutions for 40+ years. 

We use top-tier equipment, safe practices, follow building codes, and best energy efficiency standards to satisfy our customers. We believe in complete transparency, so there are no cheat codes; we offer honest pricing.

Looking for closed-cell or open-cell spray foam insulation? We’ll not only install it professionally but also help you choose the best option for your space and budget.