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Is Spray Foam Insulation Waterproof? What Woodstock Homeowners Should Know

is spray foam insulation waterproof

The weather in Woodstock mirrors the rest of Georgia. Temperature fluctuations and storms are commonplace. Many homeowners keep this fact in mind during new construction and home improvement projects.

So, when it’s time to install new or replacement insulation, it’s natural for many to choose a material that doesn’t just keep conditioned air in but can also survive even in the event of a flood.

Spray foam insulation is the highest-rated form of insulation and generally the most expensive. Is spray foam insulation waterproof, though? The best attic insulation company in Woodstock will cover all you need to know about spray foam insulation and water protection in this post.

What Is Spray Foam Insulation?

Spray foam insulation is the material you get from the mixture of polyol resin and isocyanate. Spray foam installers mix these chemicals and spray them out of a container around the surfaces they intend to insulate.

The chemical comes out as a liquid. However, it forms a semi-solid expanding foam as it reacts with the air, providing the insulation you need.

The Types of Spray Foam Insulation

Spray foam insulation comes in two variants: open cell and closed cell spray foam insulation.

Open cell spray foam insulation is generally more flexible and softer. It expands quickly, shortening the installation time significantly. It’s also easier to remove when you need to take out the insulation.

Closed cell spray foam insulation is a lot denser because the cells are closed off completely. It’s stronger and has some of the highest R-values you’ll ever see among insulation materials.

However, the denser nature of closed cell spray foam insulation means it takes longer to install. You’ll also need a lot more chemical to achieve the right level of insulation. Thus, it’s generally more expensive.

Is Spray Foam Insulation Waterproof?

In a word, yes. But only closed cell spray foam insulation. The highly dense nature of closed cell spray foam insulation means it doesn’t allow water to get through easily. The moisture resistance of spray foam insulation makes it a fantastic choice for high-humidity areas like Woodstock, GA.

However, you won’t get waterproof insulation just by using spray foam insulation. Other factors that can influence the waterproof properties of spray foam insulation include the following.

Level of Thickness

The thickness of the insulation is a major factor when it comes to the level of water resistance you can expect from your closed-cell insulation. The thicker the insulation, the higher its ability to keep out water.  

There’s no hard and fast rule for the level of thickness to aim for. However, the general rule of thumb is to aim for three inches of insulation on walls and five inches on walls.

Your insulation crew will recommend the right level of thickness based on your home’s peculiar situation, but it’s always best to ensure you meet the minimum requirements first if you want to enjoy the water-repellent features of spray foam insulation.

Quality of Installation

Professional installers of spray foam insulation do more than just point the nozzle to the wall or ceiling. They know the right ratio to go with when mixing the chemical and how much they need to express to reach the right level of insulation for your space.

They also know how to cover seams and penetrations properly. Those areas where pipes and wires enter and exit your home are usually loopholes in any poor installation work. Poor quality work can affect your insulation’s water resistance qualities.

Presence of Other Gaps and Voids

The waterproofing capabilities of spray foam insulation will not matter if your roofing is severely compromised or if you have an unfinished or untreated basement and crawlspace. The thing about moisture prevention is you can’t afford to neglect a possible source of moisture, no matter how little you think it is.

Why Waterproof Insulation Is So Important

Seeing that the answer to, “Is spray foam insulation resistant to water?” is, “Yes, if you use closed-cell spray foam insulation,” you may be wondering if you really need to worry about waterproof insulation. After all, you can get most of the main benefits of spray foam insulation with the cheaper open-cell option.

However, you’re doing the right thing by thinking about choosing waterproof insulation. Research by Statista.com, shows that floods cause billions of damage across the U.S each year. Residents in Woodstock and the rest of Georgia are no stranger to such types of damage.

Waterproof insulation helps protect your home from moisture damage, especially for the more manageable cases of flooding. Prevent moisture intrusion can save you from the dangerous impact of mold growth.

Additionally, waterproof insulation means you won’t have to worry about removing your insulation material after every storm. Materials like fiberglass lose their effectiveness when they get wet. For closed cell spray foam insulation, the wetness will never get into the core of the insulation.

This can save you significant sums over the years as you won’t have to worry about replacing your insulation or, worse, going on to live without proper insulation a few months after spending significant sums on the insulation process.

Finally, waterproof insulation is highly versatile. You can use it everywhere around your home to the same fantastic results. So, you don’t need to worry about having separate insulation for your basement or attic space.

Get Expert Guidance From Anthem Insulation & Home

Is spray foam insulation waterproof? As you’ve seen above, it comes down to what you choose, the density, and the installation. Closed cell spray foam insulation offers excellent waterproofing capabilities in a way that open cell spray foam insulation can never match.

However, getting perfect results hinges on working with a professional installation company. That’s where the team at Anthem Insulation & Home comes in. The technicians are some of the best spray foam insulation technicians in Woodstock, GA. They know how to apply spray foam insulation in a wide range of use cases.

Call now to schedule a consultation.

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