Shed insulation

[achjimmy]

Iam putting up a shed, it's primarily to put the van and boat in. But I have been told to add something to the roof to stop the condensation. They recommend Aircell insulshed which is like bubble wrap with a alfoil coating. I am also thinking about the walls especially the western wall, but the Aircell stuff is exy and this project is already so far over budget it should be a "government project"

Like to hear from others that have insulated there sheds?  There is a Aircell knock off on fleabay but the guy hasn't answered emails! Plain old malfoil sheeting is cheaper and should stop condensation too?

[A7993]

Aircell is worth every $$!

I have used it under colourbond roof on 2 sheds, and the temp reduction is amazing!  When the brickies did the walls underneath a patio structure (to make it a lockable workshop with the aircell), even they were impressed.

I usually buy the retro fit rolls, like you say, not cheap but worth it.  Get the aircell brand tape as well to cover the seams.

I am in WA and it is always hot here.  Also, any large sheds at work (Pilbara) the walls and roof are aircell lined!!

pic is of 1st shed during construction

[HEM19X]

I had 2 of these installed on the roof...doing a good job so far.


http://www.ebay.com.au/itm/WHIRLY-BIRD-SPINAWAY-ROOF-VENT-FREE-WIND-ENERGY-SAVINGS-SUPPLY-FITTED-ADELAIDE-/171010501563?pt=AU_Building_Materials&hash=item27d1052bbb

[Hairs]

G'day Jim,
I'd insulate under the tin roof as well as install a couple of Whirlybirds.
The roof insulation will help stop radiant heat and the whirlybirds will suck the hot air out. Also the roof insulation will make it bearable in in heavy rain, amazing how loud the rain can be on a tin roof.
Also, a cheap fan with the foot cut off and fixed to the roof members upside down to help more air about on those humid hot still days when there is no breeze blowing.
 

[Bird]

I have a 9mtr x 9mtr high roof shed with 3mtr sliding doors, and 1 whirlybird thing. I'm getting another 2 fitted.

I have no insulation at all in the place, shed been up for 2-3yrs now, no condensation issues.

I'd love some aircell for roof, wonder if GG has enough of it layin round .. more JD for your aircell?

[D4D]

x2 for Aircell, I fitted some behind the rear windows of the Prado, even the wife commented on how much cooler it made the back of the Prado.

[GGV8Cruza]

I'd love some aircell for roof, wonder if GG has enough of it layin round .. more JD for your aircell?

Not too much at the moment but I will keep my eye open for a roll or three

GG

[grafy82]

Agreed, great stuff it is but $1000 per roll when I bought it. I lined the walls of my shed with it as well. If you can, drapeit between the battens/purlins to leave an air gap as this helps as well.

[Barry G]

Will keep this in mind for my new shed.

[achjimmy]

Thanks all. To be precise we are talking the "insulshed" which is silver one side and white the other and about 4-5mm thick? There is another Aircell product that is silver both sides of what looks like batt material think its called insulbreak?

Yes it should be draped to create an air gap, that is how they measure the R rating.

[achjimmy]

Anybody know any good places to buy this? Also those who have done the walls did you wrap it straight over the lot? The installers told me to do roof over and the walls horizontal!

[prodigyrf]

Reflective foil laminates are designed to reflect radiant heat as distinct from convective and conductive heat (that air bubble or fibre insulation). While the foilboards are useful for retrofitting under your purlins and over girts you can kill 2 birds with one stone in shed construction with roof blanket as described here under 'Products'-
http://www.insulation.com.au/

The blanket is fitted fibre side up but if using foil only get the antiglare type and face the dull (blue?) side toward the sun or you'll fry with UV reflection. The antiglare coating makes no difference to its radiant heat reflective capability despite what you may think.

Foil alone makes a very big difference in summer and I would suggest you view that as a minimum in any shed but the blanket or foilboards go one better. Just a tip with foil strength. Use the medium grade at least and if the shed is regularly open to wind effect (usually only for commercial situations) you'll need to add support mesh or it will disintegrate over time. In commercial we always used long life specially treated fibreglass skylights in conjunction with blanket, both for longevity and radiant heat. Note that is not your lightweight domestic cheapy and polycarb with 10 times the expansion of steel is useless for long spans. 

[prodigyrf]

A chain is only as strong as its weakest link remember and here's the commercial stuff and you'll note the minm 2400grams per squ metre spec whereas the domestic stuff is 1200gsm which will deteriorate within a few years-
http://www.alsynite.com/products-ultra-cool.html
Domestic shed with 3M runs you could use low heat transmission polycarb but don't forget the purlin tape and special screws or Mr Creaky/Buckly it will be.

[prodigyrf]

Noticed Bunnings were advertising foil blanket on TV and it's well priced at $5/sm in 15M rolls-
http://www.bunnings.com.au/products_product_insul-blanket-under-roof-knauf-r13-55mm-earthwool-space_P810887.aspx?page=2
That would make any metal shed pretty cosy all year round but you'll need to the sums on your wall and roof area.

With commercial sheds we could order custom made lengths to avoid waste having to join over purlins although you can lift the wool at the ends and slightly overlap the foil ends and double tape (ie top and bottom laps)

[achjimmy]

Doesn't sisalation or the wall blanket stuff need mesh underneath as well?

[prodigyrf]

Doesn't sisalation or the wall blanket stuff need mesh underneath as well?

The idea of support mesh is to stop flapping movement of the foil in open wind situations causing it to deteriorate prematurely but in domestic sheds it would be overkill. The foil is reinforced and in  blanket form can't flap anyway but commercial deckings often have wider purlin spacings than 900mm domestic. By all means fit it if you want and certainly under open carport rooves although there the foilboards would be more economic.

Here's a tip if you're contemplating a C section domestic shed with cathedral roof say 6.1x6.1x2.4 (or 2.7 high). Order it with an extra  portal as well as specifying the roof purlins and wall girts at 600mm max centres, use foil laminate under all the iron and in future you can easily add insulation and plasterboard to make it a rumpus room. It's all about the budget though.

[GGV8Cruza]

Doesn't sisalation or the wall blanket stuff need mesh underneath as well?

Not really it will self support with the purlins or battens holding it up, the mesh is more for installation safety.

GG

[prodigyrf]

Support mesh is lightweight and only for supporting the insulation as required but there is heavier safety mesh for under skylights at commercial heights but they don't bother up to 3M with domestic. Don't confuse the two.

[Eski]

+3 for the Retro Air-cell.  My shed is done with it and the leftovers made a great blanket for the top of my camper.

Was only $250 a roll I think...

[Bird]

So is Aircell still the goods?? Any suggestions where to get some in Melbourne, looking at the prices at the Horrible greenShithole, it wont all be done in 1 go..
Still need to figure out how to attach it to the walls too. Suggestions?

[GGV8Cruza]

So is Aircell still the goods?? Any suggestions where to get some in Melbourne, looking at the prices at the Horrible greenShithole, it wont all be done in 1 go..
Still need to figure out how to attach it to the walls too. Suggestions?

Its not cheap but is the goods

https://www.bunnings.com.au/kingspan-1-35mtr-x-22-25mtr-air-cell-65-insulbreak_p0810140

If you know a roofer they may be able to get it cheaper.

Is your shed steel posts and battens clad in sheets?

You may be able to use a self drilling screw with a washer to fix it in place on the back of the purlins which the sheeting is screwed too or battens fixed over it to sandwich against the purlin. An air gap between the two is good practice.

GG

https://www.kingspan.com/au/en-au/products-brands/insulation/reflective-flexible-insulation/air-cell-insuliner

[Bird]

may be able to get it cheaper.

Probably just do it a wall/section at a time to break up the costs, but I gotta do something - its unbearable in there in the sun

Is your shed steel posts and battens clad in sheets?

steel posts for the main structrue

You may be able to use a self drilling screw with a washer to fix it in place on the back of the purlins which the sheeting is screwed too or battens fixed over it to sandwich against the purlin. An air gap between the two is good practice.

IM sure he speaking english I'll get photos when I Get back to Melbourne

[Bird]

from the company website - this is same as mine
http://www.safetysteel.com.au/wp-content/uploads/2016/11/37-1-1.jpg
inside walls look like this
http://www.safetysteel.com.au/wp-content/uploads/2016/11/Garage-Internal-274-1.jpg


this would have been a good start
https://www.ebay.com.au/itm/312224888375

[GBC]

Its not cheap but is the goods

https://www.bunnings.com.au/kingspan-1-35mtr-x-22-25mtr-air-cell-65-insulbreak_p0810140

If you know a roofer they may be able to get it cheaper.

Is your shed steel posts and battens clad in sheets?

You may be able to use a self drilling screw with a washer to fix it in place on the back of the purlins which the sheeting is screwed too or battens fixed over it to sandwich against the purlin. An air gap between the two is good practice.

GG

https://www.kingspan.com/au/en-au/products-brands/insulation/reflective-flexible-insulation/air-cell-insuliner

At the M2 rate Bunnings want for that R2 insualation, I can get R3 polyurethane spray foam done and applied. I'd recommend unscrewing the roof and putting in Anticon 100 at around $8m2 or spray from underneath if bang for buck is what you are after.

[#jonesy]

Here is a suggestion from Facebook. Pretty sure I never searched any of the links in this thread  but Facebook still put it in. Scary stiff what happens in the background