0 Helpful?

Roof venting

We are building a 3/12 shed roof with parallel trusses North of Ottawa (zone 6-7). The roof is sloping to the South. We're wondering about potential for venting problems during winter with North and NE winds, as we think the wind catching the North wall will disrupt the normal venting of the roof. The site is fairly protected but these winds will blow on and off throughout the winter.

Asked by jessie pratt
Posted Nov 23, 2012 11:53 AM ET

Tags:

1 Answer

Select your preferred way to display the comments and click "Save settings" to activate your changes.
1.

Jessie,
As long as your roof assembly is well built -- with appropriate insulation that is installed well, and a ceiling that is fairly airtight -- there is no reason to worry.

If you are depending on the effectiveness of its ventilation layer to keep your roof assembly from failing, something is probably wrong with the quality of your work or your choice of materials. Roof ventilation is much less important than most people think.

For more information on this topic, see How to Build an Insulated Cathedral Ceiling.

Answered by Martin Holladay, GBA Advisor
Posted Nov 24, 2012 6:27 AM ET

Other Questions in General questions

What vapor barrier should be used with interior / exterior insulation?

In Energy efficiency and durability | Asked by John Ranson | Aug 1, 15

Minimal maintenance Grout

In General questions | Asked by beenash khan | Aug 1, 15

Is it OK for a basement floor slab on slab edge on only 3 sides?

In General questions | Asked by Steve May | Jul 30, 15

Anybody familiar with British Columbia building codes?

In Building Code Questions | Asked by Stephen Youngquist | Jul 29, 15

Household humidity

In General questions | Asked by Walter Gayeski | Jul 30, 15
Register for a free account and join the conversation


Get a free account and join the conversation!
Become a GBA PRO!