Pretty obvious. Funny how some who fix things don't care. Your losing a ton of heat not only there but under the floor of the attic. If that home is balloon framed those open cavities into the attic probably weren't capped. I capped over 32 cavities into the attic that were opened and it cut the heat loss drastically. I have a little more sealing in our attic then I will blow another 12+ inches into the attic.