One thing to consider by requiring project teams to include windows in the calculation is areas where the exisitng windows cannot physically be retrofitted to meet the new performance criteria. Replacement of windows and other building openings such as doors and louvers are not just done for energy purposes, but to also meet Building Code requirements for windborne debris in certian regions such as hurricane zones. Additionally, with the times we live in, many buildings (federal projects especially) have force protection requirements that must be met. Replacement windows and doors can match the historic appearance and not detract from the historic exterior. There should be an option for replacement windows that meet the historic preservation requirements where these requirements exist.
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Sarah Buffaloe
Specialist, LEEDUSGBC
61 thumbs up
August 12, 2011 - 4:17 pm
Good point Patrick,
We will consider your point of code vs historic requirements for windows when developing the calculation tools for this credit. This sounds like a region specific issue, perhaps there is opportunity for a regional variation for the credit calculations.
Sarah Buffaloe
Specialist, LEEDUSGBC
61 thumbs up
August 12, 2011 - 4:18 pm
Oh, and also I wanted to remind everyone that this credit will no longer be stand alone in the 2012 draft, it will appear in the "Environmentally Preferable Structure and Envelope" credit.