Why can’t we use two-part spray foam to seal and insulate band joists?
The Consultation list was not meant to preclude any type of insulation that is normally used for insulating band joist locations, as long as the insulation is applied properly. The chief concern of the SHPO is that a vapor barrier is integral with the insulation materials whenever exposed framing members are being insulated. Spray foam would only be appropriate for insulating existing attics as long as it has both insulation and vapor barrier properties. The SHPO requires vapor barriers for most insulation work, as a trusted method of controlling moisture entrapment within existing walls and ceilings, which therefore may minimize moisture damage of existing materials if installed correctly. HVAC Upgrades and Replacement In Category B, HVAC upgrades, with the amount of snow that we get, the mechanical contractors are limited to where they can vent out high efficient furnaces or any other power vented mechanical units. Is SHPO willing to accept liability, because of their rules that the
