The ASTC ratings of mid-rise wood constructions using CertainTeed SilentFX® QuickCut gypsum board

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TypeTechnical Report
Series titleClient Report (National Research Council Canada. Construction); no. A1-007750.3
Physical description117 p.
SubjectASTC; mid-rise wood; cross laminated timber; SilentFX; CertainTeed
AbstractThe 2015 edition of the National Building Code of Canada (NBCC) includes significant changes to the acoustic requirements for residential constructions. The 2015 edition defines the acoustic requirements in terms of the Apparent Sound Transmission Class (ASTC) rating which includes contributions from flanking transmission and therefore is a better descriptor of how well the sound insulation of a building will actually protect the inhabitants of the building from unwanted noise than the STC rating which was used in earlier editions of the NBCC. The 2015 NBCC requires an ASTC rating ≥ 47 for constructions between dwelling units. The ASTC rating that a construction will achieve depends on the design of the building elements including the gypsum board, the framing and the thermal insulation as well as the design of the junctions between the building elements. Changes to the building elements or the junctions will change the ASTC rating. Forty-two examples of the calculation of the ASTC rating for typical mid-rise wood constructions (single and triple staggered wood stud walls and floors constructed of I-joists) with 15.9 mm (5/8”) SilentFX® QuickCut gypsum board, 15.9 mm CertainTeed Type X gypsum board and CertainTeed Sustainable fiberglass insulation are presented. All of the constructions shown in the examples have an ASTC rating which is greater than 47. In addition to the examples for mid-rise wood framing, an example using 15.9 mm SilentFX® QuickCut gypsum board as a lining on a cross laminated timber (CLT) construction is also presented.
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PublisherNational Research Council Canada. Construction
AffiliationNational Research Council Canada; Construction
NoteOn title page: CertainTeed
Peer reviewedNo
NPARC number23001873
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Record identifier4ca592c2-2163-4752-9f8e-d3016677fff4
Record created2017-05-03
Record modified2017-07-05
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