FAQ · Spray foam
Spray foam off-gassing: you're out of the house for a day, not for years after.
The real concern is during spraying and curing, not for years after. SafeWork NSW lists the isocyanates in it as a known cause of occupational asthma, so you leave the house while it cures. Once fully cured, the foam is largely inert.
I’m Peter Johnson, and I don’t sell spray foam, so I’ve no reason to scare you off it or talk it up. Here’s the off-gassing question, kept to what’s actually documented: where the risk really is, why you vacate during the install, and the fair caveat that cured foam isn’t the bogeyman some make out.
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Angela M.
SE Queensland
“The fact that I can't even tell it's 6 degrees outside when I wake up in the morning speaks for itself. Have wasted so much money attempting to heat and cool an uninsulated home. Worth every $.”
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P Peter
Alstonvale, 2024
“Connected with Comfort Zone Insulation and would recommend them”
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Jessa B.
Brisbane
“It dropped about 4 degrees straight away, and we added another 3 with the second job. I appreciate Peter's honesty, and the team showed pictures before and after.”
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Birtinya, 2024
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Iain V-B.
Brisbane
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Jennifer's E
Upper Caboolture, 2024
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Gerry S
Fitzgibbon, 2023
“I used Comfort Zone and they have a done an excellent job.”
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Jennifer
Upper Caboolture, 2024
“Excellent customer service. Highly recommend. Has a profound knowledge of insulation products and has the customer best interest.”
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Jung K
Riverhills, 2023
“An experienced family operation. Highly recommend. Thank you for the great job!”
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Diane A
Ormeau, 2024
“Peter and crew did a great job I would definitely recommend them”
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David H
Sunshine Coast, 2021
“Completed the job as quoted and to a high standard. Great personal service. Would highly recommend Comfort Zone for ceiling installation work.”
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Timea
Highland Park, 2023
“I was extremely satisfied with the service they provided. They gave a very thourough explanation of the materials used, the way the work will be carried out and the price I had to pay was the exact amount quoted, no hidden costs included. They arrived on time, well prepared and workwas carried out exactly how they said it would be, they were super efficient, well prepared and were kind enough to even clean up after themselves. The services they provided was second to none! I don't hesitate to recommend them for any insulation job!”
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Benjamin H
Carseldine, 2019
“Very good explanation about their works. Advice of existing problems with the roof. Clean work. Very professional.”
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Mark
Pottsville, 2017
“Michelle, we are done - Peter from comfort zone insulation was very helpful. very honest with his recommendations - in fact he told me that the product my daughter had if installed correctly was superb. Thanks Peter you are a champion and i would recommend you to any person that was wanting professional advice and old school service.”
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Ian G
Burnside, 2019
“Good information, communication and professionalism.”
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Jessica
Pottsville, 2016
“This business offers a fantastic product that other businesses did not. Pump in ceiling insulation. Knowledge of the industry second to none.”
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Danny D
Boondall, 2018
“He explained everything he was going to do and the different types of insulation they used. He talked through the different options but made a recommendation for the one most people use, which is the one I chose. He was very understanding towards what I needed and not about himself.”
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Jack
Pottsville, 2023
“Excellent communication and informative. Professional.”
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Graham R
Riverhills, 2018
“Comfort Zone. Turned up ahead of time, completed in about 2 hours, cleaned up. All good. Very motivated installation team.”
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Tony P
Redland Bay, 2023
“Very knowledgeable about insulation”
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Alex B
West Ipswich, 2018
“Fast, friendly, efficient.”
- Shipages
Steve
Redland Bay, 2017
“Excellent job and reasonable price.”
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Luke D
Mcdowall, 2017
“Peter did a good job. It was a quick and clean service. I'm happy to recommend!”
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Bruce H
Kuluin, 2023
“Prompt and efficient quoting.”
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Brendon
Brays Creek, 2016
“Peter supplied and installed roof insulation for me. He was very informative and provided good advice.”
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Gerry S
Fitzgibbon, 2023
“I used Comfort Zone and they have a done an excellent job.”
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Trevor G
Brookside Centre, 2016
“Excellent tradesmen from Comfort Zone Insulation. They were punctual and cleaned up after. Highly recommended.”
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Tamara
Underwood, 2023
“Peter is honest, hard-working and came on time. Knew excally what he was talking about and answered my questions. Would 100% recommend”
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John G
Beaudesert, 2019
“Peter is an honest person who provided me with the information I wanted then performed a good job with great results for the benefit of myself and my family.”
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Sterling G
Ashgrove, 2023
“Comfort Zone were very knowledge with great communication and follow up”
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Graham R
Riverhills, 2018
“Comfort Zone. Turned up ahead of time completed in +- 2 hours cleaned. All good. Very motivated installation team”
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Jung K
Riverhills, 2023
“An experienced family operation. Highly recommend. Thank you for the great job!”
- Khipages
Kathy A
North Lakes, 2023
“We connected with Peter through HiPages and he was prompt, professional and even came back after the job was complete to assist with a question we had. We would highly recommend Peter for further insulation works.”
- Dhipages
David H
Sunshine Coast, 2021
“Completed the job as quoted and to a high standard. Great personal service. Would highly recommend Comfort Zone for ceiling installationn work.”
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Sue H
Sunshine Coast, 2021
“Incredible customer service”
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Eileen C
Cedar Vale, 2021
“Quality work, good customer service, prompt”
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Craig M
Woody Point, 2021
“Called within 5 minutes of request. Very knowledgeable and explained job in great detail, provide great advice in prior preparation for works required. Very friendly and helpful.”
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Jenny C
Plainland, 2021
“Although I did not hire Peter I was impressed with the initial contact and the knowledge he was willing to impart. I was treated with respect which I appreciated. I would have hired but I received a lower quote.”
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Quinton
Coomera, 2020
“Professional installation without any short cuts. True to their word with high integrity. Response from Comfort Zone Insulation”
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Gary P
West Kempsey, 2020
“Came & Gave a free quote”
Off-gassing comes from two liquids reacting in your roof, and one is an isocyanate.
Spray polyurethane foam isn’t a finished product you lay in. It’s two liquid chemicals mixed and reacted right there in your roof, one of them an isocyanate. That reaction and the cure that follows are where the fumes and fine airborne particles come from. SafeWork NSW lists isocyanates as a known cause of occupational asthma. Sensitised workers can react at even very low or brief exposure , which is exactly why the people spraying it wear full respiratory protection, not just a dust mask. So the question isn’t really “is foam toxic forever”. It’s “what happens while it’s being sprayed and set,” and that’s a real, documented window you manage by staying out of the way.
Cheap or badly-mixed foam, the wrong ratio of the two parts, sprayed too thick in one pass, or applied in the wrong conditions, can keep releasing fumes for days because it never cured properly. That’s the source of most of the lingering-smell horror stories you’ll read. It’s a workmanship problem, not a feature of every foam job. But it’s a reminder that with foam the install has to be done dead right. You can’t easily take it back out.
Why you move out for the day
You leave the house while it sprays and cures. That’s the precaution.
With a foam job, the standard advice is for the occupants, and the pets, to clear out of the home while it’s sprayed and until it has cured and the air has cleared, which is often a day or more depending on the product and the weather. That’s not me being dramatic; any reputable foam installer will tell you the same, and it follows straight from the isocyanate hazard SafeWork NSW describes. It’s worth knowing before you book. It’s a real bit of disruption the brochure doesn’t always lead with.
Here’s where the contrast matters. With pump-in cellulose there’s no chemical reaction in your roof, nothing curing, no isocyanates, no two-part mix going off, so there’s no off-gassing window and no need to pack the family up and leave. We wear dust masks for the loose fibre, you stay put, and it’s done. That’s a recycled plant fibre you live with from day one, not a chemistry set in your ceiling.
The fair caveat
Cured foam is largely inert. I won’t pretend otherwise.
I’d be doing you a disservice if I let you walk away thinking cured spray foam is poisoning your home for years. The evidence says it isn’t: once it has fully cured and been correctly installed, the foam is largely inert and stable. The off-gassing concern lives in the spraying-and-cure window, and a job done properly shouldn’t leave you with an ongoing fume problem afterwards.
So my point isn’t “foam will gas you out of your house.” My point is narrower and fairer: the safety care is real but it’s concentrated in the install, you have to move out for it, and everything then rides on the cure being done right, in a product you can’t easily remove if it isn’t. If you’re weighing foam, the off-gassing isn’t the thing I’d worry about most; the moisture story in a humid Queensland roof, and the fact it’s there for good, would weigh heavier with me, and they’re a big part of why cellulose is the only product I’d use in my own home.
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More on spray foam and fumes
Is spray foam toxic, or does it off-gas?+
The real, documented concern is during spraying and curing, not for years afterwards. Spray polyurethane foam is made by reacting isocyanates on site, and SafeWork NSW lists isocyanates as a known cause of occupational asthma, with sensitised workers reacting at even very low or brief exposure. That's why installers wear full respiratory protection and occupants are typically asked to leave the home while it sprays and cures, and why cheap or badly-mixed foam can release fumes for days while it sets. The fair caveat: once it has fully cured and been correctly installed, the foam is largely inert. So it's not a product I'd call dangerous to live with afterwards, it's the install-and-cure window where the care is needed. Cellulose carries none of that chemistry: it's recycled paper and borax, inert from day one, though like any loose-fill we wear dust masks while we pump it.
Why do you have to leave the house while spray foam is installed?+
Because of the chemistry while it's going on, not because of what's left afterwards. Spray foam is mixed and reacted right there in your roof from two liquid components, one of them an isocyanate, and during that reaction and cure it releases fumes and fine airborne particles. SafeWork NSW lists isocyanates as a known cause of occupational asthma (sensitised workers can react at even very low exposure), so the installers spray in full respiratory protection, and the standard advice is for occupants and pets to clear out of the home until it has cured and the air has cleared, often a day or more. That's a sensible precaution, and any reputable foam installer will tell you the same. It's worth understanding before you book. It's not how the other insulations work: with pump-in cellulose there's no chemical reaction in your roof and no need to move out. We wear dust masks for the loose fibre, you stay put.
Once the spray foam has cured, is it still releasing fumes in my house?+
The evidence says no. Properly cured, correctly-installed foam is largely inert, and that's the caveat I'll always give so I'm being fair to the product. The off-gassing question is really an install-and-cure-phase question: the isocyanate reaction and any VOCs happen as it's sprayed and sets, which is why occupants vacate during that window. The exceptions you read about, a smell that lingers for weeks, or ongoing complaints, generally trace back to foam that was mixed wrong, sprayed too thick in one pass, or applied in the wrong conditions, so it never cured properly. That's a workmanship risk, not a feature of the material. I don't sell foam, so I've no reason to talk it up or down: the cure phase is where the care matters, and a job done right shouldn't leave you with an ongoing fume problem.
Does cellulose off-gas or give off fumes like spray foam?+
No. There's no chemical reaction when we pump cellulose. It's recycled paper fibre treated with borax, a natural mineral salt, and it's inert from the moment it goes in. There's nothing to cure, no isocyanates, no two-part mix reacting in your roof, so there's no off-gassing window and no reason for you to leave the house. The one thing to flag is dust: like any loose-fill, cellulose can be dusty going in, so our installers wear dust masks while they pump it, which the CSIRO notes is the sensible handling precaution for loose-fill. But that's airborne paper dust during the install, not a chemical fume, and it settles. That difference, a recycled plant fibre you live with from day one versus a chemical reaction you move out for, is one of the reasons I'd put cellulose in my own home before foam.
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