Brunette Girl On The Couch At The Window

vinyl or PVC - very good - good(1) - low - low - very low
Aluminum - bad(2) - good - very low - low - typically >95% - used in most large structures
Steel - medium - superior - very low - high - >98% - typically welded at corner joints
Fiberglass - very good - very good(1) - very low - high - medium