Fiberglass or rock wool batts and blown 1”

2.8–4.0

Blown cellulose 1”

3.0–4.0

Vermiculite loose fill 1”

2.7

Perlite 1”

2.4

White expanded polystyrene foam (beadboard) 1”

3.9–4.3

Polyurethane/polyisocyanurate foam 1”

6.2–7.0

Extruded polystyrene 1”

5.0

High-density 2-part polyurethane foam 1”

5.8–6.6

Low-density 2-part polyurethane foam 1”

3.6

Oriented strand board (OSB) or plywood ¹/₂”

1.6

Concrete or stucco 1”

0.1

Wood 1”

1.0

Carpet/pad ¹/₂”

2.0

Wood siding ³/₈–³/₄”

0.6–1.0

Concrete block 8”

1.1

Asphalt shingles

0.44

Fired clay bricks 1”

0.1–0.4

Gypsum or plasterboard ¹/₂”

0.4

Single pane glass ¹/₈”

0.9

Low-e insulated glass (Varies according to Solar Heat Gain Coefficient (SHGC) rating.)

3.3–4.2