Old attic insulation can hurt indoor air quality when it becomes wet, deteriorated, or contaminated

https://telegra.ph/How-to-Pick-an-Honest-San-Diego-Insulation-Contractor-How-to-Pick-an-Honest-San-Diego-Insulation-Contractor-09-03

Old attic insulation can hurt indoor air quality when it becomes wet, deteriorated, or contaminated, allowing biological pollutants and allergens to linger indoors.