Mike’s got it right. Mine was part of a batt left-over after adding some above a range hood to dampen the sound. I doubt that you could purchase a single batt, but you might find cut-offs at a homebuilding site or perhaps find an insulator willing to overlook a half-batt. Unlike fibreglass insulation, there’s not too much dust off this when handling it, and it’s non-irritating to your skin or lungs.
Wayne
Yes, I have used painted polyfiber in the past and in fact my current project is doing just that. It’s another step in the process but it saves a lot of money. I usually make a few dozen puffballs at a time in various sizes and then lay them out in the bottom of a cardboard box and give then a good spray of dark green paint. Usually one side of a puffball tree will be against the scenery so I can leave that side unpainted. Once the paint dries I use a bamboo skewer to hold the puff ball while I spray it with adhesive. I’ve tried hair spray but it just doesn’t hold as well. I then dip the puffball into small tubs of ground foam of various shades. If a spot doesn’t pick up the foam I use my fingers to sprinkle the foam onto it. I then shake the loose foam back into the tub, holding it with the bamboo skewer during the whole process. I’ve used different methods to attach the puffballs but have settled on a hot glue gun. It leaves lots of glue stringers but they are easily removed.
PS. I prefer 3M spray adhesive but on one occasion I used Loctite when Lowe’s was out of 3M. The nozzle clogged with only about a quarter of the can used. Not wanting to waste it I bought a second Loctite can figuring I could swap the nozzles when I finished with that can. Same thing happened. I’ve never had that problem with 3M. Has anyone else had similar