Insulating my UNVENTED Roof? Pole Barn

[Kels]

I have a pole barn with metal siding and am turning a portion of it into an office.

The roof currently consists of: Metal > Condensation blanket (vinyl backed fiberglass insulation ~2 or less in thickness) > Purlins ...

NO VENTILATION aside from closure strips missing so there is a small channel where the metal is raised.

The Siding is Currently: Metal > Tyvek > Wood framing

I am trying to keep the cathedral ceiling so would like to insulation at the roof but don't want to cause problem either.

Any ideas tips or tricks!

 

[MarkG]

I'll try a lot of things, but with something like this, I'd want a pro or an architect involved to eliminate any costly and frustrating 'surprises' when it's all done. Either that, or do a lot of research on similar builds. Good luck-----I wish I had a pole barn!

 

[kj_mustang]

Does it have scissor truss or gambrel? Are you going to heat and AC the office space?

 

[jomobco]

Can you add soffit vents on both sides?

 

[Kels]

and its got a standard "Common Truss" and Do not plan on having any AC its not even a standard thing for houses around here. So just heat!


There are no Eaves so can't add soffit vents unfortunately.

 

[kj_mustang]

Cathedral ceiling and common truss can not exist together. Look at this page for the different truss types. http://www.dutchcrafttruss.com/truss-design/

 

[Tunajoe]

Spray foam insulation is the ticket.

 

[Highbeam]

Spray foam insulation is the ticket.

Meh, too much money and it may not stick to tyvek.

 

[vjlobel]

Cut n'cobble sheet foam? You can get it pretty cheap of CL...code may require a fire barrier below though.

 

[Wheatty]

I live close to An Arbor as well. There is a guy that does the spray foam insulation locally, his website is foam123 dot com maybe have him give you a quote.

 

[deter]

pics? building size? building height? if you have a tall building you can build the office like a mezzanine so that the space above the office is open. insulate the office walls/ceiling