This thermal barrier consists of spun glass fibers, mineral wool, or natural fibers formed into long, continuous rolls. Installers cut the material to length and friction-fit or staple it into wall cavities, floor joists, and attic spaces. The continuous roll format reduces gaps and seams compared to pre-cut pieces, providing a more consistent thermal break.
Heard on the job
Grab another roll of blanket insulation from the truck so we can finish this attic run before lunch.
Insider tip
Keep it fluffy during installation, because compressing the fibers squeezes out the trapped air that actually provides the thermal resistance.
Also heard as
- rolled insulation