1.1 This guide addresses the evaluation of impacts to existing steep sloped roof assemblies resulting from addition of insulation or other alterations in the drying potential, ventilation, thermal or vapor resistance of the roof assembly or changes to the interior environment beneath the roof assembly. 1.2 This guide is intended to address the retrofit of existing, steep sloped roof assemblies which were originally constructed over naturally ventilated attic or unconditioned spaces.
KeywordsContinuous insulation, retrofit, moisture damage, hygrothermal analysis, slate roof, metal roof, shingled roof, attic space, energy code, steep sloped roof
Energy conservation is being addressed more often on existing and/or historically significant buildings originally constructed with uninsulated and/or unconditioned attics and roofs. Without proper evaluation, changes to the thermal and moisture properties of the roof assemblies or changes to the conditioning of the space below the roof deck could have serious negative impacts, particularly on the integrity of the existing roof deck or structural support members and the potential for condensation and other moisture accumulation related issues. This standard seeks to provide guidance on how to properly evaluate such changes and alterations.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top