This method also reduces the heat subject to attic mounted ac duct work thereby allowing them to work more efficiently.
Laying radiant heat barrier around soffit vent baffels in attic.
Regardless of the ventilation you have don t have you still need to leave a small gap at the peak of the roof as well as a gap at the bottom around where the top level of the new insulation will be of the installation.
Attic area of 55 x 35 1925 sq ft x 1 3 for a medium pitch roof about 8 9ft high at peak 2 503 sq ft.
Radiant barrier should always be installed to work with the soffit and ridge.
You don t have to have soffit vents or a ridge vent or any other type of vent for radiant barrier to work.
Plus with a typical 8 mph wind they will pull a similar amount of air as the solar fan.
Cut holes in the radiant barrier below all exhaust vents about 6 larger then the actual vent holes.
Installing radiant barrier under the roof decking is the preferred method versus on top of the insulation because it gives an air gap for the heat to escape to the ridge vent without creating a potential moisture problem between the radiant barrier and the attic floor.
Personally i would go with 2 or 3 14 wind turbines.
They work 24 7 in the dark and are cheap compared to solar fans.
A radiant barrier can lower heat transfer from attics to the building below keep the attic space cooler and lower cooling costs by up to 17 in warmer climates.
Plus once you install a radiant barrier so much heat is kept out of the attic ventilation is not as critical.
It is important to create a pathway for cool air to come in the bottom of the attic and heated air to go out the top of the attic.
For really high roofs you should consider doing a flat top installation for radiant barrier for tall attics.
Baffles establish a channel for air to circulate between the insulation and the roof sheathing.
Just think of the air like water and it is draining out the top.
Radiant barriers are utilized to reduce summer heat gain in attics and help to improve the efficiency of green building envelopes.
Radiantguard radiant barrier foil insulation installed in an attics can reduce attic temperatures by up to 30 degrees when stapled with a staple gun to the underside of roof rafters by reflecting up to 97 of the radiant heat that strikes its surface thereby reducing heat transfer from the attic to living spaces resulting in lower utility bills.
The first is stapling foil to the bottom of the roof rafters the second is laying it out over the existing attic ceiling insulation.
Attic ventilation should be very simple.
So you would order 2 500 sq ft of atticfoil to cover an area this size.