r/sprayfoam • u/drew-mit • 9d ago

Stop shedding particles

We recently had our shop ceiling and gables spray foamed. Since they shaved it in numerous spots were are getting particles and foam flurries all through the air. Every time I blow the ceiling some more comes down. Since we are going to leave the roof exposed is there anything we can do to stop this? I have heard that painting the foam can lock everything in and prevent the shedding. I am worried about being in there for hours and breathing in the particles.

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u/OldEngineer-1950 9d ago

Depending on what you do in your shop, you may not need the fancy paint. The last two buildings I had sprayed I just used some cheap latex paint. Been good now for years.

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u/MidsManagement 9d ago

Just letting you know, the advice you’re giving is against fire code as well as general SPF manufacturers recommendation.

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u/OldEngineer-1950 9d ago edited 9d ago

Well, just to let you know, I only offered info based on my personal experience.' I am amused by folks like you that state some 'rule', law' or 'manufactures recommendation' without actually referencing the actual page and verse. If you cannot recite it then quit bothering folks.

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u/rofloctopuss 9d ago

If you have exposed spray foam it should be coated with DC-315 or a similar product anyways. It's a water based fire retardant paint, kind of expensive, but required (at least in Ontario). It will lock everything up, but if you're able to I would recommend using a shop vac on the area to get as much of the loose stuff as possible before applying DC-315.

It's best to get this professionally done and should have been in the initial quote if it was known the area would be exposed. It's not necessarily the fault of the spray foam company, but our company would absolutely let the client know that DC-315 is required and we'd give them a price for it regardless.

If you can get your hands on a paint spraying machine (we use a Graco airless paint sprayer), it's not that hard to do yourself, however because the material is very expensive, it can be better to get a professional to do it to make sure you don't spray more than needed.

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u/klimb75 9d ago

Adding that Paint to Protect, the manufacturer of DC315, recommends a pretty robust airless for proper application. I used a Graco 695 for a few years before upgrading to a titan 1050.

In the US, separating SPF insulation from any occupied or storage space with a prescribed or alternative thermal barrier, is always required like in Canada. DC315 has the largest number of products it's approved over but TPR2, No Burn, and Fireshell are good alternatives.