Enhancing Efficiency: Insulating Exterior Walls with Fiberglass and Foil Insulation

InfraStop® Staple Tab Wall InsulationIf you want to combine insulation types, using reflective insulation and fiberglass insulation in a wall space can boost the R-value by 3.9 points. By utilizing reflective insulation, an R-21 total wall assembly can be created, with a vapor and moisture barrier.

In our InfraStop® line is a foil staple tab insulation product offered in 16", 24", and 48" widths. The staple tab option allows you to recess the insulation 3/4" into the stud bay.

This necessary 3/4" airspace is for the reflective insulation to operate optimally. This is also your goal while installing, to create continuous 3/4" airspace between the insulation and the interior panel, most often drywall.

For fiberglass insulation, choose R-19 un-faced option. You do not need the kraft back as the reflective insulation provides the vapor and moisture barrier. The un-faced is also less expensive.

To install, un-roll and cut the fiberglass insulation to length. Compress into the stud walls. To install the reflective insulation, unroll and cut to length. From the top, staple every 2", 3" as you go down the stud, compressing the fiberglass insulation as you go. Click the image for our installation page for this application.

The benefits of adding reflective insulation are two-fold. One, you get an increased thermal benefit, R-21, a 10% increase. Secondly, you get the major benefit of a radiant barrier. The reflective insulation will block 96% of radiant heat. This will pay dividends in comfort and in your pocket during the heating and cooling seasons.

Leave a Reply