The installed insulation R-value for 2x6 fiberglass batt ranges between R-19 and R-21. When blown or sprayed cellulose insulation is used, the R-value is typically R-20 for 2x6 walls.
Simply so, what does r19 insulation mean?
What "R-value" Means? At the technical level, R-value is a measure of resistance to heat flow through a given thickness of material. In theory, the higher the R-value, the greater that resistance. That's true to a point, but it's just one of four key factors that determine the effectiveness of an insulation material.
Which side of the insulation faces out?
Regardless of whether fiberglass insulation is installed in a wall, attic, or crawlspace; the paper facing should always face toward the inside of the home. That's because the paper contains a layer of asphalt adhesive which prevents water vapor from passing through it.
How thick is r19 batt insulation?
An example would be compressing R-19 insulation (typically 6 ¼”) thick into a 2x4 stud cavity that is 3 ½” deep. A. When you compress fiber glass batt insulation, the R-value per inch goes up, but the overall R-value goes down because you have less inches or thickness of insulation.