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Adding insulation over vinyl backed insulation

Crazywolf's picture

We are wanting to create living quarters inside of our metal building. our main concern is that the building is already insulated with a vinyl backed insulation (the vinyl is on the inside of the building so the new insulation would be placed against it). The current insulation isnt a high enough R value for a home in our zone. What options do we have for adding rock wool insulation to up the R value?

Where installing faced (post #215888, reply #1 of 1)

Where installing faced fiberglass on the inside, over an existing layer of faced insulation, the traditional approach has been to slash the facing (essentially a corner-to-corner X) of the existing stuff.  I've no idea how effective this actually iss.


Of all the preposterous assumptions of humanity over humanity, nothing exceeds most of the criticisms made on the habits of the poor by the well-housed, well-warmed, and well-fed.  --Herman Melville