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Writer's pictureKaty Bolan

My Spray Foam Regret: Why I Now Recommend Rockwool Insulation

Updated: Nov 14



When I decided to insulate my attic, I opted for spray foam. It seemed like the obvious choice – effective, airtight, and widely recommended. However, I soon discovered that spray foam carries significant drawbacks that are often overlooked. This experience led me to a far superior alternative: Rockwool insulation.


Here's why I regret my initial decision to use spray foam:


  • Environmental Impact: Spray foam is typically derived from petroleum-based products, contributing to fossil fuel dependency. Its manufacturing process releases harmful pollutants, and the material itself persists indefinitely in the environment.

  • Indoor Air Quality Concerns: Spray foam can emit volatile organic compounds (VOCs), which can negatively impact indoor air quality and potentially lead to health issues.

  • Difficult Removal and Modification: Should you need to access wiring or plumbing within your walls, removing spray foam is a complex and costly process.


The Rockwool Advantage

Discovering Rockwool was a turning point. Made from natural volcanic rock and recycled industrial slag, it offers a compelling combination of sustainability and performance:


  • Eco-Friendly Choice: Rockwool is a natural and abundant material with a significantly lower environmental footprint than spray foam. It's also free of harmful chemicals and VOCs, promoting healthier indoor air quality.

  • Exceptional Performance: Rockwool provides outstanding thermal and acoustic insulation, exceeding the performance of many traditional insulation materials. It's also naturally fire-resistant, adding an extra layer of safety to your home.

  • Moisture Management: Unlike spray foam, which can trap moisture and create conditions for mold growth, Rockwool is vapor-permeable. This allows moisture to escape, contributing to a drier and healthier indoor environment.

Making Informed Choices

My experience with spray foam underscores the importance of thoroughly researching insulation options. While spray foam may seem like a quick fix, it carries hidden costs. Rockwool, on the other hand, offers a sustainable, high-performing, and healthier alternative. If you're considering an insulation project, I strongly encourage you to explore the benefits of Rockwool.


And in case you are wondering, this is not a paid advertisement. I'm just paying forward what I learned the hard way so that you can save time and money on your renovation.

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