A proper introduction
NRCA's recently released publication The NRCA Roofing Manual: Membrane Roof Systems—2007 includes three introductions for its construction details: General Information Applicable to All Construction Details introduction; Built-up Membrane (BUR) and Polymer-modified Bitumen (MB) Construction Details introduction; and EPDM (EPDM) and Other Single-ply Membrane (SP) Construction Details introduction. These introductions provide additional information specific to design and application of the construction details and should not be overlooked.
The General Information Applicable to All Construction Details introduction states the details are generic concepts and designers likely will need to modify NRCA details to meet specific project requirements. It also states the details primarily are for new construction but can apply to reroofing projects, as well.
The Built-up Membrane (BUR) and Polymer-modified Bitumen (MB) Construction Details introduction and EPDM (EPDM) and Other Single-ply Membrane (SP) Construction Details introduction provide specific additional commentary about the components used in construction details and figures to help describe nondetail-specific issues, such as clearance between pipes, walls and curbs. When necessary, each introduction is tailored to suit specific membrane types.
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