Owens Corning R-21 Un-Faced Fiberglass Insulation Batts (All Sizes) This item is made to order and cannot be cancelled or amended or returned once ordered as it's dispatched from the manufacturer. It installs over a curb

It installs over a curb to provide a leak-proof cap

Suitable for all types of insulation including extruded polystyrene (XPS)

comfort and safety

supporting healthier indoor air quality during installation

Owens Corning R-21 Un-Faced Fiberglass Insulation Batts (All Sizes) This item is made to order and cannot be cancelled or amended or returned once ordered as it's dispatched from the manufacturer. It installs over a curbThe Owens Corning R 21 Un Faced Batts are flexible fiberglass insulation batts that are used for roof ceiling and interior exterior wall applications. They're installed in wood or metal framing cavities or between furring channels. Size Sq Ft Pack Batts Per Bag IRN Application 5. 5 in. x 15 in. x 93 in. 77. 5 8 U89B Wood 5. 5 in. x 15 in. x 105 in. 87. 5 8 K27 Wood 5. 5 in. x 15. 25 in. x 93 in. 68. 94 7 BU107 Wood 5. 5 in. x 23 in. x 93 in. 89. 13 6