EPS insulation is not compatible with hot asphalt above what temperature?

EPS insulation is not compatible with hot asphalt above what temperature?

• A. 200F
• B. 250F
• C. 300F
• D. 350F

Answer: (B)

EPS insulation has limited heat resistance, so it can be damaged when exposed to hot asphalt. In roofing, hot asphalt can reach around 250°F, and at or above that temperature EPS starts to soften, deform, or melt, compromising the insulation and overall roof performance. That’s why EPS is not compatible with hot asphalt above 250°F. Temperatures well above that (like 300°F or 350°F) would also cause failure, while lower temperatures (around 200°F) stay within a safer range. The key point is the 250°F threshold where the material’s performance degrades.

EPS insulation has limited heat resistance, so it can be damaged when exposed to hot asphalt. In roofing, hot asphalt can reach around 250°F, and at or above that temperature EPS starts to soften, deform, or melt, compromising the insulation and overall roof performance. That’s why EPS is not compatible with hot asphalt above 250°F. Temperatures well above that (like 300°F or 350°F) would also cause failure, while lower temperatures (around 200°F) stay within a safer range. The key point is the 250°F threshold where the material’s performance degrades.