CLAN1 Posted January 26, 2021 Report Share Posted January 26, 2021 Hi hope everyone ok n keeping safe. Im starting to get stuff ready for as n when we can get about AND better weather. Received good advice on here some time ago about stopping condensation, want to get some spray foam cans to fill gaps round our polystyrene insulation. Looking on line there seems to be different types, any advice on which type n where to get it most welcome.I am not interested in stripping out to get company to fully foam spray.Cheers. Link to comment Share on other sites More sharing options...
frahkn Posted January 26, 2021 Report Share Posted January 26, 2021 19 minutes ago, CLAN1 said: Hi hope everyone ok n keeping safe. Im starting to get stuff ready for as n when we can get about AND better weather. Received good advice on here some time ago about stopping condensation, want to get some spray foam cans to fill gaps round our polystyrene insulation. Looking on line there seems to be different types, any advice on which type n where to get it most welcome.I am not interested in stripping out to get company to fully foam spray.Cheers. 1 Get closed cell foam 2 Get a separate applicator nozzle which you can change from can to can 3 Larger cans are more cost effective but not if you can't use the whole can at one time so get some small ones as well 4 You can get cans of nozzle cleaner to blow a used nozzle clear after use - this is an expense but a useful one. Link to comment Share on other sites More sharing options...
BEngo Posted January 26, 2021 Report Share Posted January 26, 2021 Screwfix no nonsense stuff, in the gun grade, is fine. Equivalent own brands from any big builders merchant will be similar. Try it on polystyrene first though, in case it eats it as these are polyurethane foam. Don't bother with the fire type foams. They are designed to expand and seal in a fire rather than to stick and insulate. N Link to comment Share on other sites More sharing options...
dor Posted January 26, 2021 Report Share Posted January 26, 2021 If doing vertical panels you will need something to keep it in place. A bit of cardboard will do, otherwise it tends to just slump. Link to comment Share on other sites More sharing options...
Chris Lowe Posted January 26, 2021 Report Share Posted January 26, 2021 30 minutes ago, BEngo said: Don't bother with the fire type foams. They are designed to expand and seal in a fire rather than to stick and insulate. Not entirely true as some are designed as gap filling insulation. We use this one https://www.premseal.co.uk/product/premfire-b1/ Link to comment Share on other sites More sharing options...
dmr Posted January 26, 2021 Report Share Posted January 26, 2021 I'm about to do the same, probably going to Screwfix tomorrow to get some. Will probably get a few different ones and experiment. From what I have read its much better to get a gun and gun grade stuff rather than straight from the can. There is some foam that expands much much less than others which should be better/less messy for doing small gaps. I have read that the fire-rated stuff expands less than standard (but more than the low expansion stuff) so it might be an option, though BEngo says otherwise and he is usually right. Note that polystyrene is not fully waterproof, the damp slowly soaks in (I confirm this really does happen) so unless you have a good vapour barrier this can be a problem, so make sure that your foam repairs do not permanently trap any moisture, maybe best to do it in the summer. .............Dave Link to comment Share on other sites More sharing options...
ditchcrawler Posted January 26, 2021 Report Share Posted January 26, 2021 Chap on Facebook managed to set his boat on fire while applying canned spray foam, I don't have details Link to comment Share on other sites More sharing options...
Murflynn Posted January 26, 2021 Report Share Posted January 26, 2021 2 minutes ago, ditchcrawler said: Chap on Facebook managed to set his boat on fire while applying canned spray foam, I don't have details well he is on Facebook, which explains a lot. 1 Link to comment Share on other sites More sharing options...
ditchcrawler Posted January 26, 2021 Report Share Posted January 26, 2021 8 minutes ago, Murflynn said: well he is on Facebook, which explains a lot. So am I Link to comment Share on other sites More sharing options...
Jon57 Posted January 26, 2021 Report Share Posted January 26, 2021 1 minute ago, ditchcrawler said: So am I Do you use spray foam as well ?? Link to comment Share on other sites More sharing options...
ditchcrawler Posted January 26, 2021 Report Share Posted January 26, 2021 I am on Facebook Link to comment Share on other sites More sharing options...
Rebotco Posted January 26, 2021 Report Share Posted January 26, 2021 I know of one young tradesman using sprayfoam in a narrowboat last year, who was working near his log burner stove. The fumes from the foam suddenly exploded in his face. He is now disfigured and disabled for life, and will probably never work again. Whatever you do, take exreme care. 1 Link to comment Share on other sites More sharing options...
dmr Posted January 26, 2021 Report Share Posted January 26, 2021 I have read that the gas that it gives off whilst it is setting is very flammable/potentially explosive so suitable precautions should be taken, good ventilation no naked flames etc. ..............Dave Link to comment Share on other sites More sharing options...
blackrose Posted January 26, 2021 Report Share Posted January 26, 2021 I know a bloke who tried to paint his stove with a spray can of stove paint while the stove was alight! The spray ignited and blew back to the can. So he threw the burning can into the kitchen sink but the the plastic button had melted and he couldn't put it out. He was lucky it didn't explode but it burned all the wood in his kitchen above the sink before he managed to put it out with a fire extinguisher. F@cking idiot! Link to comment Share on other sites More sharing options...
CLAN1 Posted January 26, 2021 Author Report Share Posted January 26, 2021 A big thanks for all your replies. Have no fear im well aware of risk to blowing myself or others up. No naked flames etc, including lights. thats why i wont be doing anything till summer cheers guys Link to comment Share on other sites More sharing options...
Tracy D'arth Posted January 26, 2021 Report Share Posted January 26, 2021 I use the gun type as the can is upright in use, the cheaper ones have to have the can inverted at all times in use. Link to comment Share on other sites More sharing options...
nb Innisfree Posted January 26, 2021 Report Share Posted January 26, 2021 24 minutes ago, Tracy D'arth said: I use the gun type as the can is upright in use, the cheaper ones have to have the can inverted at all times in use. That's interesting, I can't find those or the gun, where from? Link to comment Share on other sites More sharing options...
Tracy D'arth Posted January 26, 2021 Report Share Posted January 26, 2021 25 minutes ago, nb Innisfree said: That's interesting, I can't find those or the gun, where from? Screwfix also extra stick grade. You need solvent too to clean the gun. https://www.screwfix.com/c/sealants-adhesives/expanding-foams/cat850108?brand=no_nonsense&foamtype=gun_grade&volume=750_ml&cm_sp=managedredirect-_-sealantsadhesives-_-nnfoamgungrade750ml Link to comment Share on other sites More sharing options...
nb Innisfree Posted January 26, 2021 Report Share Posted January 26, 2021 5 minutes ago, Tracy D'arth said: Screwfix also extra stick grade. You need solvent too to clean the gun. https://www.screwfix.com/c/sealants-adhesives/expanding-foams/cat850108?brand=no_nonsense&foamtype=gun_grade&volume=750_ml&cm_sp=managedredirect-_-sealantsadhesives-_-nnfoamgungrade750ml Yes I have some of those but can't find a gun anywhere. Link to comment Share on other sites More sharing options...
Tracy D'arth Posted January 26, 2021 Report Share Posted January 26, 2021 5 minutes ago, nb Innisfree said: Yes I have some of those but can't find a gun anywhere. https://www.screwfix.com/p/no-nonsense-foam-applicator-gun/28483 Link to comment Share on other sites More sharing options...
nb Innisfree Posted January 26, 2021 Report Share Posted January 26, 2021 Thanks, but.. its a standard inverted canister gun, you said you had the type that uses a canister in the upright position! Link to comment Share on other sites More sharing options...
system 4-50 Posted January 26, 2021 Report Share Posted January 26, 2021 The gas from the sprayfoam product is not just a fire risk, it is bad for your lungs. Link to comment Share on other sites More sharing options...
nb Innisfree Posted January 26, 2021 Report Share Posted January 26, 2021 6 minutes ago, nb Innisfree said: Thanks, but.. its a standard inverted canister gun, you said you had the type that uses a canister in the upright position! 25 minutes ago, Tracy D'arth said: https://www.screwfix.com/p/no-nonsense-foam-applicator-gun/28483 Or do you mean it can be used upright and inverted? Link to comment Share on other sites More sharing options...
Tracy D'arth Posted January 26, 2021 Report Share Posted January 26, 2021 (edited) 10 minutes ago, nb Innisfree said: Thanks, but.. its a standard inverted canister gun, you said you had the type that uses a canister in the upright position! I see what you mean. Try this Vertical foam gun technique 2 minutes ago, Tracy D'arth said: I see what you mean. Try this Vertical foam gun technique Amazon sell these https://www.amazon.co.uk/Foambeak-Vertical-Expanding-Insulation-Inches/dp/B01EAZJWG8/ref=asc_df_B01EAZJWG8/?tag=googshopuk-21&linkCode=df0&hvadid=427881625368&hvpos=&hvnetw=g&hvrand=2904057704448331712&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006912&hvtargid=pla-570711349423&psc=1&tag=&ref=&adgrpid=99265833763&hvpone=&hvptwo=&hvadid=427881625368&hvpos=&hvnetw=g&hvrand=2904057704448331712&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006912&hvtargid=pla-570711349423 Edited January 26, 2021 by Tracy D'arth Link to comment Share on other sites More sharing options...
nb Innisfree Posted January 26, 2021 Report Share Posted January 26, 2021 14 minutes ago, Tracy D'arth said: I see what you mean. Try this Vertical foam gun technique Amazon sell these https://www.amazon.co.uk/Foambeak-Vertical-Expanding-Insulation-Inches/dp/B01EAZJWG8/ref=asc_df_B01EAZJWG8/?tag=googshopuk-21&linkCode=df0&hvadid=427881625368&hvpos=&hvnetw=g&hvrand=2904057704448331712&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006912&hvtargid=pla-570711349423&psc=1&tag=&ref=&adgrpid=99265833763&hvpone=&hvptwo=&hvadid=427881625368&hvpos=&hvnetw=g&hvrand=2904057704448331712&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006912&hvtargid=pla-570711349423 That's clever, shame it doesn't fit on a gun. Link to comment Share on other sites More sharing options...
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