According to 4.2.1.3, existing buildings must comply with Sections 5, 6, 7, 8, 9 and 10, or 11 or Appendix G. Although, based on exception 4.2.1.3, historic buildings do not require to comply with these requirements.
Our building is an officially historic building in Portugal. Since the exception refers the US, can an historic building in Portugal be considered to this exception?
To which requirements this exception does apply? To Appendix G as well or only to the Sections mentioned before?
According to the historic building plans, the walls and floors have different (much larger than normal) widths. Should these widths be considered in the model (reducing the building floor area to the actual area)? Or should it be always considered (for any wall or floor) width equal to 0 (considering the building floor area measured with "external measurements"?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5916 thumbs up
May 14, 2021 - 2:40 pm
Historic buildings are an exception for code compliance under 90.1 but not for LEED.
The building should be modeled as designed or in this case as it exists. Quite often the extra thicknesses incorporate much thermal mass which the models take into account. Wall and floor widths should never be modeled as 0.