Can spray foam insulation be left exposed?

Answer: Never
Explanation: By code is has to be covered by something fire resistant. Sheet rock and things like that. You can however use a thermal barrier paint that allows the foam to be left un covered

Answer: In some cases
Explanation: Depends on use case

Answer: In some cases
Explanation: It may not be pleasant to look at. But is not an issue otherwise if it is exposed.

Answer: In some cases
Explanation: If used in some place like an attic, exposed spray foam insulation can be left exposed, but not in living areas of the home.

Answer: Never
Explanation: Spray foam insulation will deteriorate within a year or so if left exposed to the sun.

Answer: In some cases
Explanation: As long as it is closed cell insulation.

Answer: In some cases
Explanation: Spray foam is a popular form of insulation. If it is in a living area it needs an ignition barrier like 1/2" gypsum/drywall. In an attic it can be left exposed so long as it has a thermal barrier, ie: the ceiling below is 1/2" gypsum/drywall. There are a few brands of spray foam that do not require an ignition barrier.

Answer: In some cases
Explanation: It has been known to be a problem, yet with rpoper time of and venilation it can be OK. Depends on circumstance. It is widely used.

Answer: In some cases
Explanation: Yes in cases such as crawl space, unfinished basement or a garage.

Answer: In some cases
Explanation: In attic instalation not exposed to sunlight

Answer: Always
Explanation: I see no reason why not.

Answer: In most cases
Explanation: Spray in foam in most cases should be covered. The foam is not fire rated and can lead to any fire in the home spreading quickly.

Answer: In some cases
Explanation: Depends on the manufacturers directions.

Answer: In some cases
Explanation: Depends on the specific product used but most often it should not be left exposed.

Answer: In some cases
Explanation: Spray foam insulation which is not protected from direct exposure to sunlight will deteriorate.

Answer: In some cases
Explanation: Most types of spray foam insulation are not designed to be exposed to sunlight or other elements, as the material may break down prematurely.

Answer: In some cases
Explanation: As long as it is not exposed for a long period of time.

Answer: In some cases
Explanation: For indoor applications, Per building code requirements, foam left exposed is required to be covered by a 15 minute thermal barrier in habitable spaces of a structure. For attics and crawl spaces being used for storage the above applies. For unoccupied space or that of which is being used for equipment servicing, the above does not apply. On an outdoor application, Closed cell foam can be left exposed to the elements, but will need to be painted or covered to prevent UV damage from the sun.

Answer: In most cases
Explanation: It can be left exposed in attic space, if used on interior walls then I would cover up with vapor barrier and drywall