When planning a Spray Polyurethane Foam (SPF) insulation high pressure installation, there are many factors to consider, especially as far as site preparation best practices.
For example, is the work taking place in an occupied building or a building under construction? Will the building be vacated? Will other kinds of workers be present during the application? Will the job take place inside or outside? What is the size of the work area?
In general, industry experts suggest that all HVAC systems should be shut down during some parts of roof preparation, as well as during application of primers, SPF and coatings. Why? System shut down prevents the drawing of dusts, aerosols and vapors into interior spaces.
Once your HVAC system is shut down, be sure to seal the air intakes with plastic sheeting and tape, which will prevent dust and spray from entering the intakes. Additionally, keep the plastic sheeting in place at least several hours after the spray application is completed, usually at least 24 hours or more.
Most importantly, the HVAC system should not be restarted until appropriate time has elapsed and the plastic sheeting and tape is removed.
Consider the following best practices when preparing a site for an SPF high pressure application:
- If the entire building is not vacated, consider the potential for SPF chemicals to migrate to other floors. Containment and ventilation methods may help prevent migration.
- If local exhaust ventilation and containment methods are not used, create a work zone around the work area to protect adjacent workers. The distance between the work area and adjacent workers is usually 25 feet, however, it depends on several factors, including (but not limited to) the volume of SPF applied, the area covered, as well as air movement. Signage should be used to communicate access restrictions.
- Before starting work, designate an area for putting on and removing PPE.
- Decide in advance the potential for overspray damages. Furthermore, have a plan in place to address overspray damages to adjacent property. And, train all employees in overspray prevention.
- Protect surfaces that could potentially be damaged, including windows, doors, equipment or building exterior, prior to application.
- For outside work, take wind direction into consideration. Note that for a job that takes place over the course of several days, wind direction may change and the work area should be adjusted, as needed.
More information about SPF work site preparation, as well as spf parts, can be found at www.intechequipment.com.