Spray Foam Types – Open Cell vs Closed Cell

Open cell foam is breathable, flexible, and ideal for interior applications.

Best for:

• Attics and rooflines (vented)

• Internal walls and ceilings

• Soundproofing between rooms

• Residential retrofits

Key Benefits:

• Excellent air seal with breathability

• Lower cost per m² than closed cell

• Flexible and less dense — ideal for timber roofs

• Effective sound absorption

See where we use it in homes »
Learn about soundproofing applications »

Closed cell foam is rigid, strong, and moisture-resistant — ideal for exposed or damp environments.

Best for:

• Garages and farm sheds

• Floors and external walls

• Containers and concrete slabs

• Flat roofs or metal structures

Key Benefits:

• High thermal resistance (R-value)

• Vapour barrier in one layer

• Adds strength to wall/roof panels

• Water-resistant — prevents condensation

Explore farm and shed insulation »
Learn about container insulation »