What are membrane enclosures? And why they're dangerous.

When marinas need to sand and paint boats, the dust and fumes pose problems. They can spread throughout the building, bothering people who work in the marina and dirtying other boats. To address that, marinas often build what’s known as a membrane enclosure: a metal scaffolding structure surrounding the boat, which is then covered in plastic shrink wrap. Solves the problem, right? Well… The bigger problem is, using these membrane enclosures inside sprinklered buildings presents some serious fire safety hazards, the March/April NFPA Journal reports. The concern is that they could delay sprinkler activation in the event of a fire....