richy127

Very good article. Think I am done making more holes. Thanks.

Do appreciate everyones feedback. Like John Kogel's response but are there structural considerations that need to be considered? "Best way? Knock out all the 2X4 blocking and install normal perforated soffit covers." Please point me to Joe L's post. I could not find it. Also I started installing perforated radiant barrier under the roof on the truss rafters giving 3.5 inches of air space. Is that effective? When I added blown in insulation ten years ago I saw significant improvements. It sounds like adding more the way to go. Again, thanks. ...Rich

"Are you experiencing any problems associated with this supposed imbalance of ventilation?" High attic temperatures that eventually breaks through forcing me to use the HVAC. Roof is flat tile and the sun creates an oven effect in our cloudless summers. Once the outside temperature goes below 84 I am able to use my whole house fans to cool the house. !32 degrees when the outside is less than 100. Radiant barrier in the garage only reduces the temperature by four degrees. Gable fans has little impact on the attic temperature. See enclosed temperature chart. Thanks. ...Rich Download Attachment: Young temps 7-2013.PDF - Adobe Acrobat Pro.pdf 318.36 KB

3600 sq ft attic 12/8 pitch with 9.8 sq ft of gable vents but only 1.7 sq ft of eave ventilation made up of 2x4x22 end caps with either 2" diameter or 1.7" round holes. There are 94 holes. With only every third or fourth end cap having holes in it. Either four 1.7" or three 2" holes on the end caps that have holes. Below picture is a three holer. House is in Danville, California and was built in 1989. What is the best way to increase eave ventilation? If I put holes in the balance of end caps I would only gain 5.6 sq ft and am still out of balance. Also this would not meet the 1/300 rule. Also my calculations above does not take into account the impact of the metal fabric screen on all the ventilation openings. Thanks, ...Rich Click to Enlarge 33.12 KB