AirTight Open-Cell Foam Insulation

AirTight open-cell spray foam insulation is a spray-applied, half pound density, non-structural, thermal insulation material used in wall cavities, floor assemblies, ceiling assemblies and in attic applications. Open-cell foam insulation is a performance upgrade over conventional insulation that leads to energy efficiency, improved occupant comfort, a cleaner indoor environment and greater noise reduction for building/home owners.

Building envelopes with increased insulation levels are becoming standard practice. Consumers are increasingly involved in the selection of green building products due to rising energy costs and the recent availability of tax credits and energy rebates. Open-cell spray foam technology is a cost-effective solution to improve the energy efficiency of a building. The material expands 120 times its initial volume and fills cavities of any shape providing a continuous, protective air barrier that helps to minimize air leakage and air intrusion.

Open-Cell vs. Closed-Cell Spray Insulation Comparison

Properties1Open Cell SPFClosed Cell SPF
(ASTM D-1622)
0.4 – 0.6 pcf1.8 – 2.2 pcf
Blowing Agent Water/CO2 onlyWater/CO2 and 245fa
Aged R-Value
(ASTM C-518)
Open Cells
(ASTM D-2856)
> 90%
Closed Cells
(ASTM D-6226)
≥ 5 lb/in2≥ 15 lb/in2
Surface Burn Characteristic3
(ASTM E-84)
Class 1Class 1
Water Vapor Permeance2
(ASTM E-96)
Greater than 1 perm at 2 inches
Vapor Retarder
Water Absorption
(ASTM D-2841)
Greater than 2%
Resistant to Flood
Air Permeance2
(ASTM E-2178, E-283)
Greater than 0.2 L/s-m2
Air Barrier
at 4½” Thickness
Greater than 0.2 L/s-m2
Air Barrier
at 2″ Thickness

1 For actual performance data on a specific SPF product consult the manufacturer’s technical data sheet.
2 As designated by the International Code Council in Acceptance Criteria AC377
3 Flammability ratings do not represent actual performance in a fire situation. Class 2 is required in most residential applications. Class 1 is required in commercial buildings and some residential applications.
4 Classified as “Acceptable Flood Resistant Material” by FEMA, Tech Bulletin 29-3. Fiberglass batt and blanket insulation are classified “Unacceptable”.

(Visit the Technical Data Sheets section for additional downloads)
Open-Cell Foam Insulation
(Download The Technical Data Sheet)
download lapolla airtight open cell tds