Uploaded June 2025 | Updated September 2026, 2 hours ago

---

*An Essential Guide To Moisture Resistant Construction (eBook)* : asiri-designs.com/shop/ols/products/essential-guide-to-mold-resistant-construction

You've decided to insulate your old home... You're probably wondering do you need a vapor barrier? In this video, we explain when and where to use vapor barriers and retarders when insulating old homes, whether you even need a vapor barrier or vapor retarder, emphasizing that the decision depends on insulation type, the location of the insulation within the assembly, the type of construction, and the local climate. We also discuss the importance of air barriers and air sealing as a means of moisture control.

*A Moisture Management Guide For Residential Remodels (eBook)* : asiri-designs.com/shop/ols/products/moisture-management-for-residential-remodels

*Get our High Performance CAD Details* : asiri-designs.com/shop

*150+ Free Building Science Articles* : asiri-designs.com/resources-1

*Request Building Science Consulting Services For Your Project:* asiri-designs.com/consulting