The golden rule for good insulation is: 
High performance products within an insulation system including fitting accessories to ensure air-tightness of surfaces while respecting all professional guidelines and manufacturer recommendations as well as the implementation conditions set out in technical leaflets, taking particular care with all junctions. 

Insulation performance

Effective home insulation requires a high performance insulation system complying with fitting rules to guarantee the home’s thermal continuity and reduce thermal bridges.


Good air tightness is indispensable for an efficient insulation system: insulation that is not air-tight regardless of its insulation factor can represent energy consumption of 1 to kWh/m2.year i.e. 7 to 11% of the building’s consumption. Air tightness therefore needs to be taken on board right from the design stage of the building but also by strictly following professional guidelines during construction.
Measuring air tightness at the end of a building work is a means of checking the general quality of work. Here coordination is key and each profession should be aware that it can make a positive or negative impact. Doing things properly also saves time.

Controlled ventilation

The purpose of ventilation is to evacuate humidity, steam and pollution linked to the occupation of buildings, guaranteeing hygienic premises and healthy occupiers. Losses linked to air renewal can represent between 15 and 20% of a home’s total losses. 

Quality fitting

Good fitting of insulation systems (including insulation material, accessories, breather membranes, joins, etc.) is essential to guarantee perfect draught proofing.

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