Pole building shop soffit vents a good idea?
Kail_Z
| Posted in Energy Efficiency and Durability on
I am in climate zone 4C and I’m about to have a pole building built with 2′ eaves on a skillion sloped shed roof. I want to have the eaves soffited and the builder suggested using vented metal for this and has stated that it will help vent the building. Someday I will probably insulate the walls and ceiling in this shop. I will have the roof sheathed and I assume when I insulate, I will insulate between the purlins in the ceiling. Will the vented soffit work later when I insulate?
Thanks for any advice you all might have.
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Replies
Kail,
I was stumped at the word "skillion," but I discovered that in Australia, a skillion roof is a shed (single pitch) roof.
There are two types of insulated roof assemblies: unvented assemblies and vented assemblies. If you anticipate building an unvented assembly, you'll have to use closed-cell spray foam on the underside of your roof sheathing.
If you plan to install a fluffy insulation like fiberglass, mineral wool, or cellulose, you'll need a vented assembly. This type of assembly must include a ventilation channel between the top of the insulation and the underside of the roof sheathing. For more information on this issue, see How to Build an Insulated Cathedral Ceiling.