What is the difference between blown-in insulation and batt insulation?
Batt insulation comes in pre-cut rolls or panels that get fitted into wall cavities and between framing. Blown-in loose-fill insulation is sprayed in and settles into an even layer, which makes it the usual choice for attic floors where it can get into corners batts cannot reach. For most attics we use blown-in to top up coverage; for walls and framed cavities we use batt. The right call depends on the space, which is one reason we check the site before recommending anything. See our attic blown-in insulation and fibreglass batt insulation pages for more.