Attic Ventilation Challenge
I'm wondering if anyone might have any advice for an attic ventilation challenge I have. I'm in North Texas where summers often exceed 100 degrees. I'm really worried about the damage poor ventilation is going to do to a newer roof.
My house was built in '91 with a ridge vent and no intake vents. I got the roof replaced last year as part of the purchase of the house. Realized immediately that there was a problem with not having enough intake air to the attic. Needed this fixed last summer, but never got around to it. Determined to get it corrected this spring.
Attic Construction Details:
Hip roof with ridge vent the entire length of the peak.
Two sides of the house (back and one side) mostly do not have insulation blocking air to the soffits. Adding an adequate number of 8x16 aluminum soffit vents will not be a problem here.
It's the front and another side of the house that's the problem. (Sides of house are about twice the length of front/back.) Vaulted ceilings along this side have insulation about 1/3 the way up the roof. I haven't tried, but suspect that trying to fish rafter bafles [http://www.ornl.gov/sci/roofs%2Bwalls/insulation/fact%20sheets/attic%20floors.pdf] would be impossible due to long protruding roofing nails.
What is the best way to correct the ventilation problems in this space? I'm ruling out rafter baffles. Assuming that power vents would interfere with the passive ventilation that already exists. SmartVent [http://www.dciproducts.com/html/smartvent.htm] doesn't help me since my problem is not a lack of soffit but rather blocked space between the soffit and the attic.
Placing an intake booster on the side of the house with the blocked soffits seems like a good idea in theory - Especially because of how my attic is constructed. Truss webs have 2-foot wide particle board running along each side of the house for support. This creates tunnels that inhibit air circulation even more.
Placing an intake booster [http://www.canyonrock.com/Content/Documents/21202.pdf] in the tunnel might push static air out and over the tunnels to mix with the moving air in the attic? At least it seems like a reasonable expectation. Biggest concern would be possibly introducing moisture if fan is running while it's raining.
Another problem I'm having is a garage that has zero ventilation. [http://www.coolmygarage.com/] I'm also thinking about purchasing a garage power venting solution that might help kill two birds with one stone.
Thanks in advance for any thoughts you might have.