Exterior Roof Insulation: The Secret to Passive House-Level Performance
By Graham Mann | Published: 11/16/2025
Explore the benefits of exterior roof insulation for achieving Passive House standards, enhancing energy efficiency, and reducing costs.
Exterior Roof Insulation: The Secret to Passive House-Level Performance Exterior roof insulation(https://diyecohomes.com/blog/complete-guide-exterior-foam-insulation-energy-efficient-roofs/) is a game-changer for energy efficiency. It creates a continuous thermal barrier across your roof, reducing heat loss, eliminating air leaks, and helping achieve Passive House(https://en.wikipedia.org/wiki/Passivehouse) standards. This approach not only keeps indoor temperatures stable year-round but also cuts energy costs and improves HVAC performance. Here’s the key takeaway: Proper insulation and airtight sealing are essential for minimizing energy use and maintaining comfort. Materials like stone wool, EPS, and cellulose offer varying benefits in thermal resistance, moisture control, and cost. When installed correctly, exterior roof insulation can reduce energy use by up to 90% compared to standard homes. Key Points: - Passive House standards(https://diyecohomes.com/blog/passive-house-design-ex...
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