shed insulation using polystyrene sheets

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formula400
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Re: shed insulation using polystyrene sheets

Post by formula400 »

Something like this ?? https://www.screwfix.com/p/soudal-geniu ... lsrc=aw.ds

What kind of vapour barrier???
Does it go barrier/insulation sheets/OSD? Or insulation sheet/ barrier/OSD
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Re: shed insulation using polystyrene sheets

Post by demographic »

Inside to outside.
OSB, vapour barrier, then insulation sheets between the studs.

I usually staple the vapour barrier to the studs(as few staples as you can get away with) then the OSB over it. Oh don't forget to tape the joints on the vapour barrier
One place I worked at had what was called Smartply which is OSB thats got a solid plastic surface that acts as a vapour barrier and you just tape the joints up but I've been told it was very expensive, not sure how much I believe that.
Thick enough OSB and you can put a screw in it anywhere for shelves/whatever.
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Re: shed insulation using polystyrene sheets

Post by demographic »

Oh and I always use Gun grade foam, partly because I already have the gun but I use a lot of it pretty regularly so its in my interests to have the gun which can be shut off without wasting the rest of the tin.
I don't take a tin off the gun til I have another one ready to go on, hardly ever need the cleaner.
I never ever leave the gun without a tin of foam on it.
I clean the end of the nozzle by rubbing on timber as it cleans it without unnecessary abrasion that knackers the front valve.

Oh and I never lend them to fucking divvys.
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Re: shed insulation using polystyrene sheets

Post by Mr. Dazzle »

demographic wrote: Sun Nov 19, 2023 11:50 am Oh and I never lend them to fucking divvys.
Well that's me right out.
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Re: shed insulation using polystyrene sheets

Post by demographic »

Mr. Dazzle wrote: Sun Nov 19, 2023 11:52 am
demographic wrote: Sun Nov 19, 2023 11:50 am Oh and I never lend them to fucking divvys.
Well that's me right out.
I've lent a few out and theres always some rivet who runs the foam out and leaves it empty, or removes the can and can't find another or just so dense that they remove the old can and bugger off to have their butties so whatever is left in the gun goes off and thats my 20 quid gun knackered.

Oh and the best gun I've had yet is made by Yato and has a PTFE coated valve and the bit the can screws into is PTFE coated as well.
Lasts way better than any other, as long as you follow those rules up there ^.
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Re: shed insulation using polystyrene sheets

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Something like this???

https://www.screwfix.com/p/no-nonsense- ... -gun/28483

Never used anything like it before
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Re: shed insulation using polystyrene sheets

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demographic wrote: Sun Nov 19, 2023 11:41 am Inside to outside.
OSB, vapour barrier, then insulation sheets between the studs.

I usually staple the vapour barrier to the studs(as few staples as you can get away with) then the OSB over it. Oh don't forget to tape the joints on the vapour barrier
One place I worked at had what was called Smartply which is OSB thats got a solid plastic surface that acts as a vapour barrier and you just tape the joints up but I've been told it was very expensive, not sure how much I believe that.
Thick enough OSB and you can put a screw in it anywhere for shelves/whatever.

Would this be what I want https://www.screwfix.com/p/capital-vall ... x-4m/59191
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Re: shed insulation using polystyrene sheets

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formula400 wrote: Sun Nov 19, 2023 11:14 am Something like this ?? https://www.screwfix.com/p/soudal-geniu ... lsrc=aw.ds

What kind of vapour barrier???
Does it go barrier/insulation sheets/OSD? Or insulation sheet/ barrier/OSD
I reckon that'd do. You may need a few. Hardly seems worth buying a gun if you are unlikely to use it again.

PS if you haven't got a staple gun and are likely to be cycling anywhere near the Surrey Hills in the near future you can borrow mine. :thumbup:
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Re: shed insulation using polystyrene sheets

Post by formula400 »

Last question

Timber that I’ll be filling is 60mm, sheets of foil backed insulation is 50mm
Is that gap ok?
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Re: shed insulation using polystyrene sheets

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Count Steer wrote: Sun Nov 19, 2023 12:43 pm
formula400 wrote: Sun Nov 19, 2023 11:14 am Something like this ?? https://www.screwfix.com/p/soudal-geniu ... lsrc=aw.ds

What kind of vapour barrier???
Does it go barrier/insulation sheets/OSD? Or insulation sheet/ barrier/OSD
Cheers for the offer, but unsure when I am out that way

I reckon that'd do. You may need a few. Hardly seems worth buying a gun if you are unlikely to use it again.

PS if you haven't got a staple gun and are likely to be cycling anywhere near the Surrey Hills in the near future you can borrow mine. :thumbup:
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Re: shed insulation using polystyrene sheets

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Count Steer wrote: Sun Nov 19, 2023 12:43 pm
formula400 wrote: Sun Nov 19, 2023 11:14 am Something like this ?? https://www.screwfix.com/p/soudal-geniu ... lsrc=aw.ds

What kind of vapour barrier???
Does it go barrier/insulation sheets/OSD? Or insulation sheet/ barrier/OSD
I reckon that'd do. You may need a few. Hardly seems worth buying a gun if you are unlikely to use it again.

PS if you haven't got a staple gun and are likely to be cycling anywhere near the Surrey Hills in the near future you can borrow mine. :thumbup:


Cheers for the offer, but unsure when I am out that way
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Re: shed insulation using polystyrene sheets

Post by Count Steer »

formula400 wrote: Sun Nov 19, 2023 1:37 pm
Count Steer wrote: Sun Nov 19, 2023 12:43 pm
formula400 wrote: Sun Nov 19, 2023 11:14 am Something like this ?? https://www.screwfix.com/p/soudal-geniu ... lsrc=aw.ds

What kind of vapour barrier???
Does it go barrier/insulation sheets/OSD? Or insulation sheet/ barrier/OSD
I reckon that'd do. You may need a few. Hardly seems worth buying a gun if you are unlikely to use it again.

PS if you haven't got a staple gun and are likely to be cycling anywhere near the Surrey Hills in the near future you can borrow mine. :thumbup:


Cheers for the offer, but unsure when I am out that way
If you're buying one I can recommend the Bosch cordless. It should be man enough for the job and it's not a hulking big thing so it's nice to use if you're doing a fair number of staples. They're about £57 though.
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Re: shed insulation using polystyrene sheets

Post by demographic »

formula400 wrote: Sun Nov 19, 2023 12:22 pm
demographic wrote: Sun Nov 19, 2023 11:41 am Inside to outside.
OSB, vapour barrier, then insulation sheets between the studs.

I usually staple the vapour barrier to the studs(as few staples as you can get away with) then the OSB over it. Oh don't forget to tape the joints on the vapour barrier
One place I worked at had what was called Smartply which is OSB thats got a solid plastic surface that acts as a vapour barrier and you just tape the joints up but I've been told it was very expensive, not sure how much I believe that.
Thick enough OSB and you can put a screw in it anywhere for shelves/whatever.

Would this be what I want https://www.screwfix.com/p/capital-vall ... x-4m/59191

The black stuff is usually thicker than you actually need for walls as its for floors before the concrete goes down and gets stood on a bit through the process.

Mind, the stuff we often end up with is so thin that it doesn't staple well so the black stuffs better than that.
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Re: shed insulation using polystyrene sheets

Post by formula400 »

Just in B&Q 2.4 x 1.2m is bloody huge
Not sure what I was expecting 😂😂😂😂

Basically going to get a little bit and order the rest on line
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Re: shed insulation using polystyrene sheets

Post by mangocrazy »

Don't get expanded polystyrene - it's shit. Celotex/Kingspan etc is the stuff to go for.
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Re: shed insulation using polystyrene sheets

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mangocrazy wrote: Sun Nov 19, 2023 4:37 pm Don't get expanded polystyrene - it's shit. Celotex/Kingspan etc is the stuff to go for.
Agreed. Jablite is polystyrene I believe. :hmmm:
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Re: shed insulation using polystyrene sheets

Post by formula400 »

I got a few small sheets of this to see how I get on.

https://diybuildingsupplies.co.uk/produ ... KIQAvD_BwE

What have I learnt from this small endeavour already 🤔🤔

Don’t use a saw, use a small sharpe knife nicked from the kitchen. Much much cleaner
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Re: shed insulation using polystyrene sheets

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formula400 wrote: Sun Nov 19, 2023 7:29 pm I got a few small sheets of this to see how I get on.

https://diybuildingsupplies.co.uk/produ ... KIQAvD_BwE

What have I learnt from this small endeavour already 🤔🤔

Don’t use a saw, use a small sharpe knife nicked from the kitchen. Much much cleaner
Wait until Chef finds out what you've been doing with his /her knives. :D
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Re: shed insulation using polystyrene sheets

Post by formula400 »

2 of 18 roof bits done 🤣🤣🤣🤣🤣

Where should I be stapling the vapour barrier
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Re: shed insulation using polystyrene sheets

Post by demographic »

Through the vapour barrier onto the studs. So they hold the vapour barrier holds on til yer fixing the OSB on.
Oh and make sure theres something to fix the OSB to, especially on corners.