Posted by limehand on February 22, 2011, 12:48 am
Posted by W on February 22, 2011, 8:55 am
The climate in question is California, with 90 to 100 degree days in Summer
and 40 to 55 degree typical Winter days.
During Summer, the attic space gets to be about 140 degrees. In a perfect
world, you would want to build in sufficient insulation between the attic
and the home. For the sake of argument, let's assume that this is either
not possible or isn't an easy solution.
The question is then can anything be done to significantly lower the attic
temperature during hot Summer days?
If you were installing a new roof, then probably there are products that
would reflect heat directly from the shingle, or would absorb less heat to
the shingle. Assume that purchasing a new roof is not an option here.
Assuming you did have a ridge vent, would a reflective liner attached inside
of the roof significantly lower the attic temperature during the Summer?
Regarding ridge vents, does anyone make a model that would allow the vent to
be open during Summer and closed during Winter? The home is also fed by
vents under the roof gutter, which would stay open year round.
Posted by vaughn on February 22, 2011, 7:19 pm
Would solar powered vent fans be an option?
Posted by W on February 22, 2011, 11:07 pm
I tried a 1700 cpm electric fan, and that only lowered temperature about 10
Total 2D dimension of attic area at base is about 2100 sq ft.
Posted by limehand on February 12, 2011, 6:08 pm
Hello I would like to add to this thread but have not posted on this
list before and think I should test it first sorry for any
inconvenience this might cause a reader