JT When my condo was built, the contractor cut corners and left a lot of openings where one can not see. The unit over mine has a balcony over my kitchen windows. When it rains, water drips down one window. That is one opening. In front, there is a small roof over a 100 foot long porch, but am unable to check if there are any openings. Maintenance Supervisor said one long time owner stated that holes were punched through walls and then covered up before anyone saw. The worse part is that my unit is an end unit and between doorways both front and rear,leading to upstairs units. As all units here have Electric Forced Air Heating/Air Conditioning, I installed a Pellet Stove in my kitchen last year to cut my HIGH electric bill. Went from $285 a month for my first winter bill, down to $86 in one month. Would cellulose still be good??? Thank You!!!!!