As basic rule is: As thick as possible! This has less to do with the fact that we want to sell as much insulation as possible (naturally we are in business to sell insulation :-) ), but rather with the fact that over the years the recommendations for the optimum insulation thickness are continually being revised. This is because of
- the ever increasing price of energy
- and the associated rise in running costs for tenants
Therefore, such statements as “10cm are absolutely fine” are completely insufficient.
