Eco-Panels came out on Tuesday and Wednesday and installed the S.I.P. roof. The finished roof system for the Nauhaus Prototype will have an insulation value of about R80 when completed, because the spaces between the 8″ rafters will be packed with cellulose.
Some information about Eco-Panels, from their website:
For a truly superior building envelope Eco-Panels manufactures the only R60 panel on the market today coming in at just 8.5″ in thickness. This panel, designed specifically for use in arctic regions, is perfect for the passive house or net zero energy designs where most modeling software calls for an R40 wall and R60 roof (of course this will vary based on region). This roof panel will perform at better than R60 at 20deg F (-7deg C) using LTTP (long term thermal profile) and temperature vs k-factor performance data provided by the foam component manufacturer.
- 8 1/2″(21.6 cm) = R60+
- Maximum panel length is 12′-0″ (360 cm) although this can be increased to 16′-0″ for large opportunities
- Maximum panel width is 4′-0″ (120 cm)
- The insulation is high-R-value polyurethane foam injected at a density of 2.5 pounds per cubic foot.