CASCADIA CLIP® FIBERGLASS THERMAL SPACERS FOR EXTERIOR INSULATED CLADDING SYSTEMS Traditional methods of attaching cladding through exterior insulated wall assemblies cause so much thermal bridging that meeting code requirements is virtually impossible. The Cascadia Clip® is an answer to that problem. As one of the first thermal clip systems on the market, we are experts on thermal bridging and cladding attachment. Cascadia Clips are universal and can be used with any type of cladding.