Fiberglass Insulation

Hayward offers a full line of Johns Manville fiberglass insulation products to meet the thermal, acoustical and manufacturing needs of projects of all sizes.

Standard fiberglass blankets and batts have a thermal resistance or R-value between R-2.9 and R-3.8 per inch of thickness. High-performance (medium-density and high-density) fiberglass blankets and batts have R-values between R-3.7 and R-4.3 per inch of thickness. See the table below for an overview of these characteristics.

To evaluate blanket installation, measure batt thickness and check for gaps between batts as well as between batts and framing. In addition, inspect insulation for a tight fit around building components that penetrate the insulation, such as electrical boxes. To evaluate sprayed or blown-in types of insulation, measure the depth of the insulation and check for gaps in coverage.

Type 15oc 15-1/4″oc 16oc 23oc 23-1/4″oc 24oc
R6.7 (unfaced)  x
R8 (unfaced) x x
R11 (unfaced) x x x
R11 (foil) x
R11 (kraft) x x x x
R13 (unfaced) x x
R13 (kraft) x x
R15 (kraft) x
R19 (unfaced) x x x x
R19 (foil) x
R19 (FSK faced) x x
R19 (kraft) x x x x
R21 (kraft) x
R30 (kraft) x x x
R38 (kraft) x x

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