How does the insulation Densima® work ?
DENSIMA is non symmetric and composed of the following compressible successive layers:
- an upper reflective and highly vapour permeable membrane
- a 37 mm thick, compressible layer of moisture-proof polyester fiber
- a layer of bubbles of dry air enclosed in polyethylene
- a lower film of pure aluminium, 30 microns thick, treated against oxidation
The upper reflective membrane reflects the solar radiation in summer and improves comfort by reducing the risk of overheating whereas the lower film of aluminium returns the thermal radiation in winter. The core of the insulation, composed of a polyester wadding and a layer of dry, stable air trapped in a bubble film effectively slow the transfer of energy by conduction.
DENSIMA is used as a reflective breather membrane for roofs when there is no insulation material between the rafters.