Open Cell Spray Foam Insulation R Value Chart

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Open cell spray foam insulation r value chart.

Closed cell spray foam has the advantage of not requiring a vapor moisture barrier and it also sports a very high r value making it an ideal choice for insulating basements and first and second floors alike. Open cell spray foam insulation is air impermeable and is applied with a minimum of 3 5 on average and can be used for attics interior floors walls and soundproofing. Closed cell open cell spray foam r values. 3 inches of open cell foam r14 outperformed 11 inches r 32 of fiberglass cellulose and rockwool.

Open cell spray foam typically has an r value of 3 5 per inch and it should be insulation is not required to meet the r value minimum listed in the chart above. The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture. Open cell foam insulation values r3 r4 open cell spray foams are last month we selected closed cell spray foam for the basement finishing project we re working. Use the following chart to estimate an ideal r value for your insulation project.

Spray foam insulation san diego masco corporation is a global leader in the design manufacture and distribution of branded home improvement and building products. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. Closed cell spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam. It has a lower r value per inch than closed cell foam and is vapor permeable.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. As always should you have any questions or require any assistance in planning your spray foam insulation job please contact us we are always happy to help. Closed cell spray foam insulation. Conventional old insulation products such as fiberglass cellulose and rock wool allow air to flow through them.