Over the past few weeks we have discussed Hazard Communication in Part I, Part II, Part III and Part IV. And last week we discussed several on-site safety considerations for projects that use spray foam insulation. By following the procedures discussed over the past few weeks, employers can improve workplace conditions, minimize risk to their employees and meet OSHA compliance.
This week we will discuss a very specific safety consideration related to spray foam insulation… and some good advice for any combustible construction material.
When working with and around combustible materials like wood and spray foam insulation, fire safety should be on everyone’s mind. There is potential for fire when these combustible materials are exposed to open flame or high heat from cutting, welding, grinding and other activities that occur during the construction process.
With this in mind, here are seven steps for fire safety:
Step 1 Conduct safety meetings with other trades
Step 2 Post warning signs at the site
Step 3 Move combustible materials including foam shavings away from hot work
Step 4 Be cautious of the applied thickness for your rigid spray foam, confirm thickness limitations with the material manufacturer. Spraying rigid closed cell foam too thick, too fast could lead to increased internal temperatures. High temperature buildup inside the foam can reduce the foam’s physical properties, lead to thermal cracking and in some extreme cases result in combustion and fire.
Step 5 Shield spray foam insulation with fire or welder’s blanket
Step 6 Provide fire watch. Have appropriate fire extinguisher and telephone nearby. Evacuate area if fire cannot be extinguished immediately.
Step 7 Protect the installed foam with a thermal or ignition barrier as soon as possible.
While fires involving spray foam are rare, they can happen, and when they do they reflect poorly on the overall industry. It is your responsibility to make sure you take care of your projects and protect the image of the industry and your profession. Best of luck.
Remember, this information offers general guidance based on industry best practices and any specific recommendations from an individual SPF manufacturer supersedes these general recommendations. Additionally, professional judgment must be exercised in making these decisions, taking into account the specific circumstances of the project at hand and the best way to address these conditions.
Stay tuned next week as we continue to discuss the interesting world of spray foam insulation.
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