Innendämmung ohne Dampfsperre - aufgespritzte und verputzte Altpapierzellulose auf dem Prüfstand

Interior insulation without a vapour barrier - spray-on rendered recycled paper cellulose put to the test.

In the course of increasing thermal upgrades of existing buildings, interior insulation is in many cases the only way of achieving a substantial increase in comfort and safeguarding the value of the building.
In recent years, numerous diffusion-open, capillary-active systems have appeared on the market, one of which is presented in the following, a system with a number of special characteristics and a wide range of possible applications.
Since its development in collaboration with Joanneum Research and the CelluloseProduktionHartberg - CPH company under a subsidised research project, the spray-on rendered cellulose insulation has been refined in three further subsidised projects headed by the Institute of Building Construction at Graz University of Technology in cooperation with renowned national and international partners and tested by means of long-term in situ measurements combined with transient hygrothermal simulation calculations. Most recently in a comparison with four other interior insulation systems regarded as ecological and diffusion-open based on the integration of timber beams, a particularly critical factor.
Even though the application is highly demanding, it was possible to demonstrate the suitability of spray-on rendered recycled paper cellulose as diffusion-open interior insulation without a vapour barrier even with integrated timber beams. The system is thus recommended for thermal upgrade of extremely uneven or curved structures.