It may be starting to sound like attic ventilation fans aren t worth the hassle and could cause more problems than they solve.
Attic vents are they necessary.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Things have been ok low energy bills house very comfortable.
Attic insulation that is less than r 19.
Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them.
However there are certain circumstances where they can prove useful.
In theory these are excellent tools for circulating air in the attic and keeping the attic temperature low.
However in pursuit of attic ventilation some people choose to install attic power ventilators.
They are easy to install under the roof s overhang which is known as the soffit are generally hidden from sight and provide excellent protection from weather outdoor debris and pests while still allowing air to flow into the attic.
Told that the 2 attic power vents are the only attic ventilation i have the house does have vented soffits every other soffit cover is vented.
To install the rafter vents staple them directly to the roof decking.
Soffit vents are one of the most popular intake vent styles.
Attic vents control moisture and temperature intake vents under the soffits are an important part of a n attic ventilation system.
Where necessary smaller branch vents that can t easily be connected to a main soil stack may also run directly up through the roof.
A fan may actually suck air conditioned air from your home into the attic.
Photos 1 6 show how it s done.
In practice however attic power ventilators may not be as useful as we might hope.
If you have few vents in your attic most of the air will be drawn from inside the house.
Rafter vents come in 4 foot lengths and 14 1 2 and 22 1 2 inch widths for different rafter spacings.
Rafter vents ensure the soffit vents are clear and there is a channel for outside air to move into the attic at the soffits and out through the gable or ridge vent.
I had new power vents installed they are more powerful move more air than previous ones.
Attic ventilation fans could be effective if your home has.
But before you cut any holes plan the locations of the attic vents.
By installing more roof vents such as a ridge vent you increase the possibility that most attic air will come from outside says tim carter a residential contractor in cincinnati.
In fact they can be harmful to your energy bill.
Vents that run along the roof ridge are an alternative to those that exit through the roof decking or gables and if the ridge is long enough they may be the only roof vents.
Continuous or individual soffits.
Noticed one of the attic vents was not working.
