Insulating a Building

[hel123]

Hi, any thoughts on insulating a box profile cladded shed with timber purlins?

We want to convert it to storage.

The building is 135ft x 60ft wide.

Would we need to insulate the roof and sides or just do the roof for now

We might do it in stages

 

[Doing it for the kids]

See my other posts on this.

In short buy seconds rigid insulation board @75mm then fit sheets of plywood over and paint. This give a 25mm air gap between roof and insulation.

Ditto fo walls if required

Cheapest way, done over 7000 ft2 here with it.

 

[TripleSix]

That's the cheapest.

The easiest is to get someone in to spray foam it.

You can't take the shed down after though if you wish to move it.

 

[Doing it for the kids]

That's the cheapest.

The easiest is to get someone in to spray foam it.

You can't take the shed down after though if you wish to move it.

True but I am not convinced spray foam is good for the fibre cement sheets. It can't breath.

 

[Pond digger]

True but I am not convinced spray foam is good for the fibre cement sheets. It can't breath.

I’d be even more concerned about any timber purlins.

 

[Doing it for the kids]

Very true. The only one of mine I sprayed foamed was an old crendon shed and that was only because we couldn't fit anything to the concrete purlins for fear of cracking them

 

[sh40]

See my other posts on this.

In short buy seconds rigid insulation board @75mm then fit sheets of plywood over and paint. This give a 25mm air gap between roof and insulation.

Ditto fo walls if required

Cheapest way, done over 7000 ft2 here with it.

any links to these posts. cant seem to find them and also interested? Have you any pictures or are they some perhaps on the other posts?

 

[B R C]

You are fitting insulation between purlins? Would it not be easier to fix to underside of purlins then nail ply on? Where are you getting seconds sheets from?

 

[S J H]

You are fitting insulation between purlins? Would it not be easier to fix to underside of purlins then nail ply on? Where are you getting seconds sheets from?

You can get ply bonded onto celotex, but I can't remember the price. I'd have thought you'd have to batten it first though, because I don't expect the purlin centres will ever match up with 8x4'

 

[Forever Fendt]

Underline the timber purlin with white metal liner sheet ,do 3 purlin gaps so sheets about 4m long fix with timber fix tek screws and insert cladding roll insulation as you go and remember to first fix any lights ect and drop the wires through the sheeting ,have done a few showrooms like this and they look smart

 

[Nearly]

You can get ply bonded onto celotex, but I can't remember the price. I'd have thought you'd have to batten it first though, because I don't expect the purlin centres will ever match up with 8x4'

http://www.ebay.co.uk/itm/Structura...078421?hash=item2f0d912315:g:6E0AAMXQ1d1THXL1

 

[hel123]

Underline the timber purlin with white metal liner sheet ,do 3 purlin gaps so sheets about 4m long fix with timber fix tek screws and insert cladding roll insulation as you go and remember to first fix any lights ect and drop the wires through the sheeting ,have done a few showrooms like this and they look smart

Do you mean profiled sheets or the sheet before being profiled of the roll?

Sounds good though

 

[Doing it for the kids]

here you go.

paid about £13 for a 75mm celotex sheet and £7 for ply, all plus VAT.

I would not use the rolls, they will get wet with condensation in the roof.

crucial to keep an air gap between bottom of roof sheet and insulation.

whole was done in a few weeks, dread to think what a professional would have charged to do this!

 

[Doing it for the kids]

and if you have concrete purling then you have to spray foam, looks like this...