![An attic kneewall sheathed with OSB and extended upward to create an insulation dam [Photo credit: Dave Yelovich, Tilson Homes]](https://www.energyvanguard.com/wp-content/uploads/2021/07/attic-kneewall-osb-sheathing-insulation-dam.jpg)
An attic kneewall sheathed with OSB and extended upward to create an insulation dam [Photo credit: Dave Yelovich, Tilson Homes]
An attic kneewall sheathed with OSB and extended upward to create an insulation dam [Photo credit: Dave Yelovich, Tilson Homes]
