IRSST publication

Polyurethane Foam Spraying - Good Practices Guide 2nd edition

Roberge, Brigitte; Teasdale, Bernard
Guide  RG-632, Montréal, IRSST / Montréal, ASP Construction, 2013, 34 pages.
This document (print version) is available at the ASP - Construction - Phone: 514 355-6190 or 1 800 361-2061 - http://www.asp-construction.org/default.aspx

Version française disponible : RG-623

Project: Évaluation de l'exposition des travailleurs aux isocyanates dans le secteur de la construction : prévention du risque associé au diisocyanate-4,4' de MDI lors de la pulvérisation de mousse rigide à base de polyuréthane dans le secteur de la construction

Champ: Chemical and Biological Hazard Prevention


Construction workers are exposed to 4,4’-diphenylmethane diisocyanate (MDI) when they spray a mixture of MDI polymers and a resin compound, which form a rigid polyurethane foam used as thermal insulation for buildings. Studies have shown that this process releases significant concentrations of MDI. The Regulation respecting occupational health and safety indicates that this substance is a sensitizer. This study documented the practices relating to occupational health and safety (OHS) under a variety of conditions under which insulation work is done, and evaluated the MDI concentrations in the work areas. The workers run a risk of exposure to MDI in aerosol form, particularly when they do this work indoors. The report’s authors note that nothing indicates that OHS practices are completely respected on Québec construction sites and recommend that the subject of respiratory and skin protection be integrated into the continuing training of workers.

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