Section 12-K605. BUILDING ENVELOPE SYSTEMS

 

Strike Section 605.1 of the International Green Construction Code in its entirety and insert new Section 605.1 in the Green Construction Code in its place to read as follows:

 

605.1 Prescriptive compliance.  Where buildings are designed using the prescriptive-based compliance path in accordance with Section 60l.3.2, building thermal envelope systems shall comply with the provisions of Section C402 of the Energy Conservation Code and the provisions of Section 605.2 where applicable.

 

605.1.1 Insulation and fenestration criteria.  The building thermal envelope shall meet the requirements of Tables C402.1.2 and C402.3 of the Energy Conservation Code.

 

605.1.2 Air leakage.  The building thermal envelope shall be durably sealed to limit air leakage in accordance with Section C402.4 of the Energy Conservation Code.

Strike Section 605.2 of the International Green Construction Code in its entirety and insert new Section 605.2 in the Green Construction Code in its place to read as follows:

 

605.2. Roof replacement. For roof replacement on an existing building with insulation entirely above the deck and where the roof slope is less than two units vertical in 12 units horizontal (17-percent slope), the insulation shall conform to the energy conservation requirements for insulation entirely above deck in the Energy Conservation Code. 

Exception: Where the required R-value cannot be provided due to thickness limitations presented by existing rooftop conditions, including heating, ventilating and air-conditioning equipment, low door or glazing heights, parapet heights, proper roof flashing heights, the maximum thickness of insulation compatible with the available space and existing uses shall be installed.

 

 

authority

Section 10 of the Construction Codes Approval and Amendments Act of 1986 (Act), effective March 21, 1987 (D.C. Law 6-216; D.C. Official Code § 6-1409 (2012 Repl.)) and Mayor’s Order 2009-22, dated February 25, 2009, as amended.

source

Final Rulemaking published at 61 DCR 3356 (March 28, 2014 – Part 2); as corrected by Errata Notice published at 61 DCR 5246 (May 23, 2014).

EditorNote

The District of Columbia Green Construction Code (2013) , referred to as the “Green Construction Code,” consists of the 2012 edition of the International Green Construction Code published by the International Code Council (ICC), as amended by the District of Columbia Green Construction Code Supplement (2013)(12 DCMR K). The International Green Construction Code is copyrighted by the International Code Council and therefore is not republished here. However, a copy of the text may be obtained at:http://publicecodes.cyberregs.com/icod/igcc/2012/index.htm?bu=IC-P-2012-000023&bu2=IC-P-2012-000019.