Depot buildings are often adapted to the barns etc. The thickness of the insulation depends on the type of material from which the wall is built. Generally layer 4-6 cm Pianki pur written on the wall is sufficient, to ensure no freezing at very low temperatures. If you would like to provide a gas-tight building that is the minimum required 4 cm insulation.
As regards the roof – from below, they should be reinforced 7cm polyurethane insulation - the insulation meets the very low temperature.
Polyurethane foam used for storage is so Hard, that adopted vegetables or fruits do not damage the insulation, and the foam from your site does not allow for freezing vegetables directly in contact with the insulated wall.
It is also significant, the polyurethane insulation is free of any odors that may affect the quality of vegetables or fruit. It has a hygienic certificate NIH.
