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.
If your attic is not sufficiently vented you probably won t have to look very hard to find signs.
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.
Handyman is the one call solution to all of your attic improvement projects.
Of net free area for every 150 sq.
Touch your ceiling on a warm sunny day.
That said air resistance and interference such as vent grates reduces the area of true ventilation.
This means for every 150 square feet of attic floor space there should be 1 square foot of net free area.
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.
Good places to check include windows doors and around cable phone or internet lines that run through walls.
The smoke test can give you a good idea of your home s existing attic ventilation but it may take a professional roofing contractor to determine if the amount is sufficient or excessive.
Intake vents located at the lowest part of the roof under the eaves allow cool.
Of attic floor space.
Building codes typically require 1 square foot of venting space for every 150 square feet.
Your roof vents may not look anything like the ones shown in this article.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Always ask a licensed professional to install your roofing materials.
Professional roofing how to install soffit vents.
Or it may have gable vents which are louvered openings at the top of gables.
How to check attic ventilation calculate net free vent space.
If you want to keep your attic fan in top condition all through summer without having any issues schedule a seasonal inspection and hvac maintenance appointment before the hot season begins.
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.
Professional maintenance for attic fans.