Types of roofing attic ventilations.
Passive roof vent.
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That hot air can condense and cause mold growth and rotting.
Achieving calculated continuous and unimpeded airflow through the roof cavity is relatively straight forward.
Roof vents enhance the overall comfort of the house by providing escape hatches for hot stale moist air which can reach temperatures of 150 degrees in summer.
Whilst it is possible to retrofit passive ventilation solutions to existing buildings it is highly recommended to incorporate passive ventilation during the design phase of any new building project.
In order to facilitate this exchange of warm and cool air the general rule.
You don t want that kind of hot air in your house especially not in the winter.
I mentioned five excellent roof vents in this article but my favorite has to be the lippert components 389381 white roof vent because of the patented 360 siphon design it has adopted.
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Ice dams are a whole other story.
The benefits of passive roof vents.
In winter you need to dump that hot air before it condenses which can lead to rot and mold.
Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.
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It can also get trapped in the attic and cause quick melting of the snow which then runs down the roof and refreezes causing ice dams.