Homeowners often ask if a vapor barrier is necessary for optimizing attic insulation and protecting their homes from moisture-related damage. The answer, however, isn’t one-size-fits-all.

Reviews and recommendations are unbiased and products are independently selected. Postmedia may earn an affiliate commission from purchases made through links on this page. Attic rain occurs when ...

For attic walls, the recommended R-value varies ... Adding too much insulation can trap moisture and hinder ventilation, potentially leading to mold growth or structural damage.

McHenry said it’s common for heat to escape a house and into its attic, which causes condensation to build. "It appears to cause leaks," McHenry said. McHenry said condensation is more likely to ...