Hi Sam,

The default figures in our material library are based on industry averages. I would assume that the Interface & Mohawk carpets are ‘higher end’ products which wouldn’t be representative of the ‘average’ carpet.

Unless you can provide references that confirms that ‘business-as-usual’ in commercial/office buildings have thicker carpet underlays (i.e. NCC requirement for min carpet thickness), I would suggest sticking with the industry average defaults in the Reference Design.