> The sun can hit the roof all day and it will not heat a normal house This is completely false. An attic that's heated up to 130+* will have a significant imp

> The sun can hit the roof all day and it will not heat a normal house This is completely false. An attic that's heated up to 130+* will have a significant impact on the temperature of the house it's attached to unless you use an uncommonly ridiculous amount of insulation. This is why things like attic fans are so effective in reducing AC load...