Rigid foam can be cut easily to make proper vents.
You need to get a Home Energy Solutions Audit. This typically involves a blower door test, which measures the air-tightness of your home. It can also help to locate the source of air leaks in the building.
A home energy audit is essentially an assessment of your home's energy efficiency. It typically involves a blower door test, which measures a home's air-tightness. It can also help to locate the source of air leaks in the building.
It is time to change insulation when old insulation becomes visibly dirty, malodorous, or shows signs of physical damage or infestation by pests.