Choosing the right insulation material can significantly impact energy efficiency, safety, and long-term costs. In this guide, we compare silica aerogel insulation with the most common traditional alternatives.
Thermal Performance
Aerogel insulation offers a thermal conductivity of 0.015-0.023 W/mK, compared to mineral wool (0.035-0.045 W/mK) and expanded polystyrene (0.030-0.040 W/mK). This means aerogel can achieve the same insulation value in roughly one-third the thickness.
Fire Safety
Silica aerogel achieves A1 non-combustible classification under European standards, making it one of the safest insulation materials available. Many traditional foam-based insulations are combustible and require additional fire barriers, adding cost and complexity.
Moisture Management
Unlike many traditional materials that absorb water and lose their insulating properties, aerogel insulation is inherently hydrophobic. It repels liquid water while remaining vapor-permeable, which prevents moisture buildup and corrosion under insulation (CUI).
Space and Weight
For applications where space is at a premium, such as retrofit projects, pipeline insulation, or aerospace components, aerogel is the only practical solution for achieving high thermal resistance in minimal thickness.
Cost Considerations
While aerogel has a higher material cost per square meter, the total installed cost can be competitive when factoring in reduced labor time, thinner profiles, longer service life, and lower maintenance requirements.