The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows.
Professional to have check my attic vents.
Or it may have gable vents which are louvered openings at the top of gables.
That said air resistance and interference such as vent grates reduces the area of true ventilation.
Without exception you should talk to a professional to determine what your home requires.
Check that the insulation is pulled back away from the vents or ask your roofer to install attic ventilation baffles to prevent the insulation from creeping over the edge of the soffit.
How to check attic ventilation calculate net free vent space.
Always ask a licensed professional to install your roofing materials.
Professional maintenance for attic fans.
Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation.
Intake vents located at the lowest part of the roof under the eaves allow cool.
This means for every 150 square feet of attic floor space there should be 1 square foot of net free area.
Touch your ceiling on a warm sunny day.
Good places to check include windows doors and around cable phone or internet lines that run through walls.
Professional roofing how to install soffit vents.
Your roof vents may not look anything like the ones shown in this article.
Building codes typically require 1 square foot of venting space for every 150 square feet.
The attic is crucial to energy efficiency air quality and roof integrity.
Your roof may have a ridge vent which is a low profile continuous roof air vent running along the peak of the roof.
Follow these maintenance tips for your attic fan once in every 2 3 years.
If your attic is not sufficiently vented you probably won t have to look very hard to find signs.
Of net free area for every 150 sq.
Inspect the vent openings.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Handyman is the one call solution to all of your attic improvement projects.