Flat roof insulation costs $0.76 per square foot (for 1 inch thick PolyISO with 6-R value).
High quality rigid foam insulation that is properly installed will greatly improve ventilation, eliminate drastic temperature fluctuations inside the home, and protect from leaks.
Here are the best insulation materials along with prices, features, and r values.
Rigid Foam Board Insulation Prices
Usually homeowners spend about 25% of the total cost to install a flat roof, on high quality insulation.
The most efficient and best insulation used is rigid foam (Polyiso); it accounts for over 60% of all flat roof installs.
ISO is available in a range of thicknesses,
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