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Does Mold Remediation Need to Happen Before Spray Foam Insulation

Posted by Ecostar Insulation on February 05, 2026

Homeowners often consider spray foam insulation when looking into insulation upgrades for their home. The reason spray foam is so highly regarded is because of its R-value, water-resistance, and mold-resistance. In fact, many homeowners seek out spray foam insulation as a solution to an existing mold problem. While spray foam can help prevent future mold outbreaks, existing mold should always be remediated prior to installing spray foam insulation in Mississauga. If you have been dealing with consistent outbreaks for some time, then spray foam insulation costs are a smart investment that can help keep mold at bay. Reach out to EcoStar Insulation to get started. 

Understanding Mold Growth in Homes

spray foam insulation mississaugaMold is the direct result of excess moisture in your home or property. When naturally occurring mold spores land in warm, damp environments, mold growth can occur in as little as two days. This is why outbreaks tend to occur in leak-prone attics, crawlspaces, or wall cavities. 

Oftentimes, homeowners may find mold in or under their existing insulation. Old, damaged, or poorly installed insulation can leave gaps that allow moisture to enter your property from outside. This leads to mold in or under your insulation.

What Spray Foam Insulation Does

Spray foam insulation is the new industry standard for both homes and commercial properties because of its durability and excellent R-value. Spray foam has an R-value between 3.5 and 7, allowing for excellent heat resistance. This will ensure your home stays cool in the summer and warm in the winter.

Spray foam insulation also creates an airtight seal when it dries down from a liquid to a solid. This helps create a moisture barrier that prevents unwanted leaks, condensation, and water infiltration. While closed-cell insulation is entirely waterproof, open-cell insulation is not, and although it is decently water-resistant, it may require a vapour barrier to keep humidity out.

While installing spray foam insulation in Mississauga may help prevent mold, it cannot treat or kill existing mold. 

Why Mold Remediation Must Come First

If you were to cover a mold outbreak with spray foam insulation, it would seal in all of the mold-causing moisture, allowing the mold to continue thriving. Over time, this mold can damage the structure of your property by deteriorating wooden beams and infiltrating drywall. Sealing mold into your building envelope also poses health risks to occupants since mold is toxic and can cause allergy-like symptoms, respiratory issues, and even cognitive issues. 

Entrusting a reputable mold remediation company with removal is absolutely essential. Once remediation is complete, installing spray foam insulation in Mississauga is a smart choice to prevent recurrence. 

Prevent Future Mold Outbreaks with Spray Foam Insulation

While spray foam insulation cannot treat existing mold outbreaks, it can help prevent future mold growth. Spray foam creates a durable barrier that helps keep unwanted moisture and heat outside of your home. Before installing spray foam insulation, ensure that you get any and all mold removed from your property to ensure its health and safety. Once that is complete, reach out to the professional team at EcoStar Insulation for spray foam insulation. Contact us today for a quote on spray foam insulation costs.

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