Contractor blowing cellulose in, says don't need plugs
1948 house, wood siding with aluminum over the top of that. Interior is drywall. I hired a company to remove the aluminum siding, drill a 2" hole and blow in cellulose. I was surprised to see they are not plugging the hole at all, just leaving it open and putting the aluminum siding back on.
Should they be using wall plugs? I would think there is going to be air penetration or water penetration.