In a pour-and-debridge system, strength and stiffness of the frame member is reduced because of the lower strength of the thermal break material and the loss of the composite action of inside and outside elements.

Compared to pour-and-debridge, Insulbar® is a totally different approach. Rather than a singular aluminum extrusion which is cut apart after the thermal break is inserted in the channel, Insulbar® takes two separate lineals and joins them through the use of pre-manufatured plastic. Both the inside and outside aluminum profiles are extruded independently with a cavity that will ultimately receive the Insulbar® foot. After the lineals are extruded, knurling wheels ride in the cavities for the entire length of the profiles, imprinting ridges into both legs of the cavity.

Since Insulbar's coeffiecient of expansion is very close to that of aluminum, internal stresses are drastically cut. The creation of a thermal break by inserting Insulbar® into the aluminum is a mechanical operation and, accordingly, is not susceptible to the variables associated with the pour-and-debridge process, which may affect the efficiency of the break itself.