To install blown-in insulation in existing walls, holes are drilled at the top of each stud space (usually on the exterior), and material is blown in via a long, flexible hose.

How to Install Insulation in Walls Installing rolled insulation or batt insulation is relatively easy, but if you want blown-in insulation or spray insulation, it’s better to hire a professional ...

Insulation is measured through a system known as R-value, which determines how resistant different types of insulation are to heat flow, taking into account the thickness and density of the ...