what I did to lower the temps. in the attic was ... staple pink fiberglass insulation onto the interior of the roof as well as doubling up on all side and under the roof line vents. lowered the house by a good 20+* in the summer.Short answer to that is nope. To put a tarp over an entire house would be quite a job, not to mention even finding one that big. What to use for spacers? The wind blowing would likely shred it after a short while.