Rafter vents come in 4 foot lengths and 14 1 2 and 22 1 2 inch widths for different rafter spacings.
How vent attic.
It can do both.
This method relies on convection which is a mode of heat transfer that is caused by the tendency of warmer air to rise.
Guide to attic air ventilation adequate ventilation.
The most common method is the static method.
A roofer will from the attic mark a spot near the ridge of the roof he may first use nails from the attic to mark preferred spots between two rafters.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Attic venting process mark the spacing of your soffit vents in between the rafters or joists.
Connect the two cuts.
For a roof intake is usually achieved through eave or soffit vents while exhaust is achieved through roof vents or ridge vents.
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.
Using a saw cut holes that are a tad smaller than the vent you re using.
Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.
Insulation at least r 38 or more is there for heating and cooling.
Hole through the soffit right between the lines and measure the.
In order to create a consistent flow of cool dry air through your attic you need to make sure the air has a way to come in and go out.
There are many different options available to provide adequate ventilation to your attic space.
Figure courtesy of the nrca.
Start by using a chalk reel to snap two parallel lines down the center of the soffit.
See the benefits of attic ventilation a new roof is more than just shingles.
How to install soffit vents make two parallel lines.
Clear any debris or insulation blocking the ventilation holes.
Before we explore how to.
There are two methods used to ventilate attics.
Next bore a 3 4 or 1 in dia.
Best ventilation is open soffit venting to a open vented ridge vent.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.
Secure the vents in place using the included hardware.
One last thought attic ventilation is not there to get rid of heat it is there to get rid of excess moisture accumulating from the home.
Ridge vent must me installed per the manufactures instructions.
