Ventilation Ventilation for a barn-style house

Published on January 4th, 2017 | by Henri

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Ventilation for a barn-style house

Q.  How would you install ventilation on a barn-style house? Thank you.

A.  You certainly have not given me much information. There are many styles of barns. If the barn is old and has been used for housing cows, it must already have some ventilation on the roof in one of several forms: cupolas, metal shafts, etc.

If it is a different style barn not having used for farm animals and it is used, or will be used, as a home, ventilation can be provided as for any houses.
That system would comprise:

  1.   A continuous, externally baffled ridge vent set over a 2-inch open slot at the peak of the roof.
  2.  A continuous, full length soffit vent at each eaves.
  3.  An uninterrupted air space of a minimum 2-inch clear between the eaves and the ridge.

Why an externally baffled ridge vent, such as Shinglevent II? Because the baffle prevents the wind, and snow and rain, from entering the ridge vent, and stopping its exhaust function.

An externally baffled ridge vent redirects the wind over the ridge vent, increasing the exhaust of air from the attic – the Bernoulli Principle.

If the barn does not have overhangs providing soffits, they can either be built by extending the rafters, or soffit venting may be provided with one of the special eaves vents designed for use on the roof itself.

Do not used gable vents in connection with a ridge and soffit ventilation system; they are counterproductive and short-circuit the air movement from soffits to ridge.

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