We ll start with the easiest methods that most homeowners can do and work our way up to the more time consuming diy projects.
Best way to vent attic.
Luckily with today s building technology.
The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows.
If you re serious about finding the best way to keep an attic cool this guide has the answers you need.
Of attic floor space.
Insulation at least r 38 or more is there for heating and.
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.
In order to facilitate this exchange of warm and cool air the general rule.
I suggest you read some of the well written and informative articles by joseph lstiburek founding principal of building science corp for guidance on ventilation and insulation issues.
Finding the best way to ventilate an attic in your home can become a real thermal nightmare.
It can do both.
Adding attic vents is a simple matter of cutting holes and installing vents.
Of net free area for every 150 sq.
The best way to vent an attic is to reduce the need for venting.
More ventilation at the eaves than at the ridge will slightly pressurize the attic.
A 60 40 split is a good sweet spot.
Whole house fans powered attic fans.
But before you cut any holes plan the locations of the attic vents.
Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them.
Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.
Fans and vents may be installed on the roof system that will draw the air out of the attic space and exhaust it to the exterior.
Below you ll find the top 7 best ways to cool your attic down.
1 if we airseal the attic ceiling interface well very little moist house air and heat will get into the attic to cause condensation mould.
For best results provide between 50 and 75 of the ventilation space at the eaves.
Best ventilation is open soffit venting to a open vented ridge vent.
These fans may be controlled by a switch or a thermostat which detects heat build up in the attic space and automatically exhausts the attic space.
Unbalanced ventilation should be in favor of the lower vents gable and soffit because you don t want to depressurize the attic.
Ridge vent must me installed per the manufactures instructions.
Photos 1 6 show how it s done.
Attics can be the site for excessive heat build up which can lead to many problems such as increased levels of moisture damage to the structure and roofing materials and a higher energy bill.
This means for every 150 square feet of attic floor space there should be 1 square foot of net free area.
