Building scientist Joseph Lstiburek explains when to vent your roof, when not to, and how to execute each common roof-venting approach successfully.

I live in New England where ice dams are a common problem, which is to say improper roof venting is a common problem. Roof-wrecking ice dams aren't the only reason…

Here's why: to minimize the risk of ice dams, to keep the roof sheathing dry, and to extend the lifespan of the roofing.

Bring in fresh air through venting drip edge.

Builder Mike Guertin gives sound advice on gable, ridge, and soffit vents.

How and where you vent your roof depends on a lot of factors, including what type of roof you have, where you live, and what existing vents you have.

Can you measure cooling energy savings that might be attributed to the existence of a ventilation channel? Nope.

Reroofing is the perfect time to lift the hood and make short work of an otherwise awkward venting job.

Retrofitting undershingle intake and ridge vents helped to cool and dry this 120-year-old attic.

On a shingle-style house, aluminum soffit vents just won't do.

Energy advisor Martin Holladay offers some key points to consider when venting a roof.

Dealing with sub-contractors and LBM suppliers who disappoint. And your ideal work set-up vehicle.

Q: Our house will have cathedral ceilings. Is an airspace between the insulation and roof sheathing necessary? I am concerned about a loss in energy efficiency if there is no…

With today's construction methods, the minimum code requirements may not be enough.

If you need to find the pitch of an existing roof all you need is a level and a tape measure.