Back to work, I got, at most, exactly one half of an hour of light to work each day after work if I race home at 5pm. Daylight savings time makes for long outside projects! It worked though just took more days than it should have. You ca barely see it but all the little spaces between got filled with batt insulation wrapped in plastic, should make a fairly sealed off space, even though it only has about an r-10 value to the insulation it ought to be able to do the job. I hope, I'll monitor it.