R thermal resistance: approximately 2.40-2.60/10 cm.
Application: walls, ceilings, roofs
Low density open-cell foam does not form a vapour barrier because it easily absorbs moisture, therefore the interior of the building must be covered with vapour insulation material.
Open-cell foam makes good thermal insulation even though it is almost twice lower comparing to closed-cell foam. This foam is much more friable, lighter, it expands to a greater extent, therefore it is perfect for filling gaps. The price of sprayed cubic metre is lower, however, its layer must be twice as thick comparing to closed-cell foam in order to obtain the desired thermal resistance.
Open-cell or fibrous thermal insulation materials can lose up to 30% of R value after absorbing only 2% of moisture.
Depending on the field of application, this foam has its own advantages and disadvantages.
Characteristics of open-cell polyurethane foam:
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Closed-cell content (in accordance with ISO 5490) |
CCC1 in accordance with EN 14315 ≥ 20% |
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Thermal conductivity (value in accordance with EN 12667 and EN 12939 |
0.034 – 0.036 W/m x K |
|
Water resistance (in accordance with EN 12087) |
Not suitable for direct contact with water |
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Rate of resistance to water vapour (µ) (in accordance with EN 12086) |
High permeability µ < 15 |
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Resistance to air flow |
Tightness depends on thickness |
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Compressive strength (in accordance with EN 826) |
≥10 kPa |
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Resistance and rigidity |
Low resistance and rigidity, does not overload structures of the building |
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Material density (in accordance with EN 1602) |
8-15 kg/m³ |
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Sound absorption rate (in accordance with EN ISO 11654) |
High sound absorption rate = 0,5 |
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Reaction to fire according to classification (in accordance with EN 13501-1) |
F; E |
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Foaming agent |
CO2, H2O |
OPEN-CELL POLYURETHANE certificate