R-Values for Common Insulation Products
(based on NRCan requirements outlined in the ecoENERGY Retrofit program)
Batt & Loose Fill Insulation R-value
Glass Fibre Batt/Blanket 3.2 R/in
Mineral Wool Batt/Blanket 3.3 R/in
Cellulose Fibre Blown 3.6 R/in
Cellulose Fibre Poured 3.4 R/in
Glass Fibre Blown 2.9 R/in
Glass Fibre Poured 3.0 R/in
Mineral Wool Blown 3.0 R/in
Mineral Wool Poured 3.2 R/in
Rigid Board Insulation
Glass Fibre Boards (below-grade) 4.2 R/in
Glass Fibre Boards (exterior sheathing) 4.4 R/in
Expanded Polystyrene (EPS) – low density 3.7 R/in
Expanded Polystyrene (EPS) – high density 4.0 R/in
Extruded Polystyrene (XTPS) – low density 4.7-5.0 R/in
Extruded Polystyrene (XTPS) – high density 5.0 R/in
Polyurethane & Polyisocyanurate Boards 5.8-7.2 R/in
Phenolic Foam Boards—open cell 4.3 R/in
Phenolic Foam Boards—closed cell 8.3 R/in
Semi-Flexible Isocyanurate Plastic Foam 4.3 R/in
Spray Foam
Polyurethane Spray Foam 6.0 R/in
The above tables represent typical R-values for insulation types. Specific products may vary.
