Removal and replacement of a roof membrane where there is existing roof insulation integral to or below the roof deck.Alterations to walls and floors, where the existing structure is without framing cavities and no new framing cavities are created.
Alterations to roof or ceiling, wall, or floor cavities that are insulated to full depth with insulation having a minimum nominal value of R-3.0/in.Replacement of glazing in existing sash and frame, provided the U-factor and SHGC will be equal to or lower than before the glass replacement.Installation may be either on the inside or outside of the existing glazing. However, a low-emissivity coating is not required where the existing glazing already has a low-emissivity coating. Installation of storm windows or glazing panels over existing glazing, provided the storm window or glazing panel contains a low-emissivity coating.
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