Field observations have identified that air intrusion in
mechanically attached roof systems can affect roof system
performance. However, the questions of how much air movement occurs
and which components provide the required resistance to air
movement have never been addressed.
To measure air intrusion in mechanically attached roof systems,
an experimental study has begun at the National Research Council
(NRC) of Canada as part of its Special Interest Group for Dynamic
Evaluation of Roofing Systems (SIGDERS) research.
Air movement consists of either air...
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