Will spray foam kill mold? Yes, because spray foam creates an air seal and will starve that mold of its food source — moisture and oxygen — and will inhibit any future growth, it will also cause the mold to become dormant.

Can you spray foam over black mold?

Using spray foam on currently developing mold patches can hinder growth and prevent any further spread—the spray foam cuts off mold’s moisture and air supply as it’s water-resistant. … Often, mold is a very sneaky fungus, and its spread can’t be easily detected. Therefore, prevention is better than cure.

What are the disadvantages of spray foam insulation?

• Spray foam insulation does not always fill every possible cavity. …
• Spray foam insulation might encourage water damage for some homeowners. …
• Spray foam insulation can sometimes shrink. …
• Spray foam insulation requires a lot of experience to get it right.