your house was built in winter and your builder was using that insulation to block the cold air from entering into your house from that tube.
how can they forget to take those things out when they installed your range hood fan?
your house was built in winter and your builder was using that insulation to block the cold air from entering into your house from that tube.
how can they forget to take those things out when they installed your range hood fan?
that doesn't affect your drywall's normal functioning actually that's what the drywall supposed to do (hide construction details, create a smooth finish ). but insulation in the exhaust pipe of a rang hood, how the fan would work with that thing in the pipe?