Attic thermal barrier...cheap.

[BamZipPow]

Although it would be tempting to use household aluminum foil...I think it would tear too easily.

You would need something like AtticFoil!!

Prices seem reasonable...I might have to see how well that stuff would hold up as an exterior vehicle cabin cover...as long as I had some sort of soft material attached to the underside to keep it from scratching up the glass/chrome/paint...you know...as a test.

[hondo434]

How about the heat mirror film they put in windows. it deflects the sun and is supposed to lower heating and cooling costs. I have it in my windows install 20 years ago. It definitly makes a diference when the sun is beating down. I have seen it advertised in after market film application.

[mloveland78]

The cheap single layer mylar space blanket material will work quite well if stapled to the underside of the roof rafters, provided that there is adequate venting at the peak and eaves. This creates a natural convection current of air flowing through the rafters that will keep the attic MUCH cooler in the summer time. It is one of the things they are doing in Australia to deal with the record heat/drought they are having.

[stovie]

hey just forget the reflective altogether go and get some 12mil plastic or better and staple it between the trusses then get soffit vent if u don't have it and run ridge vent also that way there's more then enough ventelation cause u just reduced the cubic footage of the house. With the ridge vent on my sisters house there was enough vent with vented aluminum soffit and 60 ft of ridge vent to vent a 3900 sqft attic and she only had 1600 sqft