Data bank

Researched information on cellulose insulation

The CE marking for construction products is a European certification procedure that verifies and standardizes product properties in a uniform and comparable manner across member states. In the UK, the UKCA certificate is required to demonstrate product conformity for goods placed on the market.

A Declaration of Performance (DoP), in which you can find all relevant product information, is published for each CE/UKCA-marked product. Product information is applied in construction according to the Classification of Buildings category, so it is important that this is clear before purchasing insulation material.

Important product information and explanations

Thermal conductivity λD (23,50) 0,038 W/mK

The lower the thermal conductivity, the better the insulation. The thermal resistance of Termex Cellulose insulation remains uniform throughout its density range (26–60 kg/m3), regardless of the installation method.

AFr airflow resistance 4–40kPa S/m2 (26–60 kg/m3)

High airflow resistance prevents heat loss caused by natural convection (air movement). The air flow resistance of Termex Cellulose insulation changes as its density changes. For example, with an insulation thickness of 450 mm, the air flow resistance is 6 kPa*s/m2, and convection is not accounted for in calculations.

European fire class B-s2,d0

The European fire class (A-F) gives information about a product’s fire properties. B =very low contribution to fire. Termex Cellulose insulation burns slowly by smouldering, without losing its volume (= no melting), even at high temperatures.

Water vapour permeability µ = 1.4

Water vapour permeability indicates a product’s resistance to water vapour. The lower the number, the better the vapour passes through the insulation material. Moisture transfers mainly in the hygroscopic area of the cellulose insulation, meaning that it insulates well even when moist.

Mould resistance: mould index = 0 (no mould)

Mould index 0 = the product passes a strict test without growing mouldy

Settlement: 0-10%

<10 %(dry open blow: attics, intermediate floors and floors)
0% (forced blowing: wall cavities, pitched roofs and floors)
0% (Sidox installations: attics and walls)

Heat capacity 1600 kJ/kg

Specific heat capacity indicates how much energy is needed to change the material’s temperature by one degree. The higher the heat capacity, the longer it takes to change the material’s temperature.

Global warming potential GWP 105 g CO2e/kg

Global warming potential indicates the quantity of climate emissions the manufacturing of the product causes (negative climate impact).

Biogenic carbon storage 1350 g CO2e/kg

Biogenic carbon storage indicates how much carbon the manufacture of the product binds from the atmosphere (positive climate effect).

(Sources: EAD 040138-01-1201, RTS_150_21, research report ECO–P22022-22014-en)