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for the development, maintenance and promotion of employees’ health behaviours. Health behaviours of employees include habits or actions related to their physical activity, eating habits, drug use or cigarette and alcohol consumption. Programs aimed at improving the health behaviours of employees are important not only because they benefit employees’ health, but also because they benefit organizations by contributing to creating healthy work environments. Positive features, such as high productivity, high employee satisfaction, good safety records, few disability claims and union grievances, low absenteeism, low turnover and an absence of violence, characterize a healthy work environment (Quick, 1999). Employees’ job stress appears across studies as an important condition linked to the development of different unhealthy behaviours. Stress at work is associated with less physical activity (Heslop et al., 2001; Ng & Jeffery, 2003) and diets characterized by a higher fat intake (Hellerstedt & Jeffery, 1997) or higher consumption of fast food (Pak, Olsen, & Mahoney, 2000). Studies on stress and smoking have predominantly shown that smokers report higher stress levels than non smokers (Adriaanse, vanReek, Zanbelt, & Evers, 1991; Pak, Olsen, & Mahoney, 2000; Parrot, 1999), and stress at work is also linked to consumption of caffeine (e.g., Swanson, Lee, & Hopp, 1994). Multifactorial models for the explanation of alcoholism consider stress as an important factor linked to the alcohol abuse (Echeburúa, Bravo, & Aizpiri, 2008; Peyser, 1992), and higher intakes of alcohol have been associated with stress at work (e.g., Heslop et al., 2001; Bravo, Echerburúa, & Aizpiri, 2008). Perhaps due to the presence of other main obvious risks, the construction sector was not identified as a traditional sector at high risk of work related stress. However, recent studies suggest that stress can be a concern in this industry (e.g., Madine, 2000). The Health behaviour and safety in the construction sector