Total diy radiant barrier comparison cost vs savings.
Radiant heat barrier vs attic fan.
When utilizing osb radiant barrier sheathing you can reflect up to 97 of solar radiation which translates into an attic heat reduction of up to 30 f.
A cooler attic space means less heat moving to the cooler space below the attic.
This is really what drives heat flow the top surface temperature of the insulation.
Total diy radiant barrier installation costs w attic fan.
This would be like blowing a giant fan on your sunny driveway and expecting it not to be hot.
The hotter it gets the better radiant barriers work.
Here is where many people screw up attic ventilation.
For the record both the radiant barrier spray paint and the radiant barrier foil will reflect i e.
Air temperatures would drop but surface temperatures would not drop much due to the radiant heat gain.
If you install a radiant barrier it will drop the surface temperatures inside the attic compared to the air temperature in the attic.
Not emit radiant heat.
Meanwhile the radiant barrier foil will reflect 97 of the radiant heat transfer.
95 of homeowners will not be able to install a roof mounted attic fan with temp switch or proper venting.
More is not always better.
Radiant barrier should always be installed to work with the soffit and ridge.
Keep in mind in order to get this price you must be very savvy with electrical and active venting solutions.