Informative vid well done

spoken like a person who has never built a home or any sort of structure. combustion air vents are tiny, compared to all the radiant heat you can block from the roof by putting foam between the rafters (standard radiant barrier sheathing does the same job, possibly cheaper, but you dont get the benefit of sealing all the tiny cracks.) go study a little physics, especially the part about heat flow and thermodynamics, then try again.

fakiir wrote”standard radiant barrier sheathing does the same job, possibly cheaper, but you dont get the benefit of sealing all the tiny cracks.” Radiant barrier adds about 300 dollars to a job, foam about 10,000, just so you know you fckn moron. And since most of the country isnt dumb enough to put their hvac in the attic, insulating it would be a complete waste in most of the homes in the country. A 10,000 dollar waste.

Foam, radiant barrier, and fiberglass are all good choices to insulate an attic with. When used together, use achieve an extremel energy efficient attic. Since this is where a home loses most of its energy, your best investment for additional insulation is here.