All of our profiles used in producing the Steel or Bronze Windows and Doors utilize a two part thermal break including a fiberglass reinforced structural center of extruded polyamide which is then filled with high density polyurethane to increase the insulation values of the thermal break. This thermal break technology also lends itself to a better acoustical comfort level.
As you can see in the photos below, both profile types have a similar thermal break. The Narrow Stretto profile and the Ampio share the same type of thermal break but it is relative to the size of the profile. The Ampio is the more robust of the two types and is used primarily for larger door units and lift-slide systems.
Stretto Profile Ampio Profile