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Flatrock Passive: A Well Insulated Slab

To minimize heat loss, both the stem walls and the slab are insulated with rigid foam
Green Homes
The First U.S. Passive House Shows That Energy Efficiency Can Be Affordable

#Relatively Small Investments Can Add up to Big Gains with the Right Design Strategies With R-60 insulation and a south-facing wall punctuated by triple-glazed windows, this Passivhaus home stays comfortable…

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Flatrock Passive: A Well Insulated Slab