How to insulate a metal roof?

[bowmatty]

  

 

Hi Team, 

i have an issue with my decking area, the metal ceiling drips with condensation on winter mornings. 
It is a single metal sheeted roof panels with battons.
How can i resolve this issue permanently and be able to put nice things out.

what insulation would you recommend and also ways to install this?

thank you 

[bowmatty]

Thanks for all your help Mitch! i knew i could count on you guys! 

Ill post some pictures with the project to show you always.... 

[bowmatty]

I've had a change of plan. 

I dont really want to drill into purlins, so ill glue the panels using the Polyurethane Adhesive. DO you think the one you recommended will be enough to hold it permanently in place? 

[MitchellMc]

That's a bit hard to give you an answer on @bowmatty.

According to the manufacturer, they require mechanical fixing. I would presume that if adhesive were enough, they'd have it as a recommended installation method. I am relatively confident that the Sikaflex 11FC would permanently fix them in place, but due to there not being any testing for me to reference, I can't really give you a definitive answer.

Mitchell

[bowmatty]

Hello, 

I have insulated the underside of my roof with Foilboard 10mm panels.The boards were cut to size and snug fitted. Sikaflex 11FC Has been used to secure in place. 

Condensation forms however it evaporates very quick. The dripping as also stopped. 

The project was successfully , costing around under $900 for a 60m2 space. 

 

 

 

[MitchellMc]

Winning @bowmatty! What a sensational job you've done there! 

That's not a bad cost to solve the dripping problem and add a layer of insulation to the roof that will help prevent heat from radiating down underneath.

Full marks from me as your insulation looks impeccable!

Well done and many thanks for sharing your results.

Mitchell

[Dave-1]

@bowmatty 

Nice work! That has come up really nice and you have done a professional job on the sheets! 

Dave

[hank12]

Hi there,

I am looking at doing the same. Just want to know how is it working now? Is foilboard still in good condition?

My decking roof is polycarbonate so not sure if can use foilboard.

Cheers,

Handy

[bowmatty]

Morning Handy, 

Still working and no sign of condensation build up or drips. 

I will have to reapply some more adhesive on a couple of the panels as parts have come unstuck (may not have applied much glue in those areas). Other than that, the panels are holding very well. 

 

[MitchellMc]

Welcome to the Bunnings Workshop community @hank12. It's fantastic to have you join us, and great to see that @bowmatty has answered your question.

Do you have timber rafters to install the boards between? If so, how far apart are they installed. If you don't have rafter spaced conveniently, then the option option might be to adhere the Foilboard to the sheeting. However, Foilboard using gutter silicone for adhesion has only been tested on steel roofing. You might need to do a test to discover whether adhering the boards is a viable solution for polycarbonate.

The other option is to install timber purlins between the rafters, to physically screw the sheets into.

Please let me know if you have any questions.

Mitchell
 

[hank12]

Hi bowmatty,

Thanks for letting me know. Good to know it is working fine.

I might use a bracket to keep it in place if I can find something quick and cheap to use.