Insulating conservatory roofs.

[joe-90]

As someone who is an experienced joiner/plasterer/decorator for the past 30 years, I reckon I should jump on the conservatory roof bandwagon.

But what's the best system?

I reckon roof revive use TRI ISO Super 10. It's a ton per roll but has 10 metres.

On a 10 square metre roof, I reckon that using that, battening it out and foil backed plasterboard would cost around £200 - £230 in materials plus labour.

A couple of days work - day 1 Insulate and batten: Day 2 board, tape and skim.

So £600 in labour.

So I see it as a definite earner.

But is there a better way? Deeper battens and Kingspan?

Insulated PB?

I guess if you used the TRI ISO you could hold it up with double sided tape until you batten.

How would you guys do it?

 

[Nige F]

TRI ISO - but don`t use screws through it - they bind up in the layers So you`ll have to get a staple tacker out of the profit . Would that be £600 labour and £2400 profit

 

[joe-90]

The problem is that the insulation goes up first - then the batons. That means you can't use a stapler.

 

[catlad]

screw some 10mm lats up first then you can staple then baton.

 

[joe-90]

But you still have to screw through the TRI ISO.

 

[catlad]

Good point Joe but it maybe ok if you push hard on the baton when screwing them up.

 

[Nige F]

It might be due to the screws being twinthread or suchlike . I`ll get hold of an offcut and have a look @ it with different screws

 

[^woody^]

TRI-ISO needs a timber counter batten screwed through it to give an airgap between it and the plasterboard

 

[joe-90]

But does it all screw up like Nige was saying?

 

[^woody^]

No

 

[joe-90]

I bet Nige is on flippin' drugs.

 

[joe-90]

BTW Woody. Do you have to make any provision for ventilation?

 

[^woody^]

There is potential for condensation on the cold roof sheets if there is an air gap below the sheets.

Roof revive indicate some sort of ventilation but its not clear how they achieve it. Then mention venting at the eaves, but I can't see any mention of top venting at the ridge

 

[joe-90]

Maybe they simply drill a row of holes. Anyway, I'd have thought that if you can stop the warm, moist air reaching the cold polycarb, then condensation wouldn't be an issue.

 

[noseall]

But does it all screw up like Nige was saying?

Yes.