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

Ice damming — Low-slope roof — Resolvable or hopeless?

In GBA Pro help | Asked by Jake Rabe | Aug 19, 16

Water between the bottom of the window and rough opening?

In General questions | Asked by Clay Whitenack | Aug 25, 16

What to do about stairs and doors during basement energy retrofit?

In General questions | Asked by adam stanton | Aug 24, 16

Two condensation questions

In General questions | Asked by John Sexton | Aug 7, 16

Is there a way to seal VOCs?

In Green products and materials | Asked by Carolyn Farrow | Aug 25, 16
Register for a free account and join the conversation


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