Frame for a window and a method for making a frame

A first frame of a window for positioning adjacent to a second frame of the window, the first frame comprising:

• a top member and a bottom member and first and second side members, each such member having an outboard surface configured to face a corresponding outboard surface of the second frame of the window,
• at least one of the top, bottom and side members including an insulating abutment list on the outboard surface configured to face an outboard surface of the second frame of the window, the insulating abutment list being made from a material having a thermal conductivity of less than 0.08 W/(m·K), and
• the first frame configured as a stationary frame or as a sash frame.

A method for making a frame for a window comprising the steps of

• providing an insulating abutment list and a frame main body;
• and
• attaching the insulating abutment list to the frame main body at a top, bottom, or side members of the main body, wherein the insulating abutment list is made from a different material than the main body, the different material having a thermal conductivity of less than 0.08 W/(m·K).