

Just like the specs above, you want more than text on a web page about the warranty. While downloading a warranty is a good start (you can find and download ours here), you also want to be able to ask and get good answers on how that warranty is applied. You should be able to talk to someone at the company and ask how warranty claims are handled and what is involved. Just seeing a stated warranty period is not enough to fall back on. Be wary of certain things that can void your warranty (like installing by salt water) or stipulations on what’s covered and what is not (especially on ‘Lifetime’ warranties).
An excellent example of the limitations is how large a hinged window’s opening element can be. Most aluminium windows only go up to around 1.2 m or 1.5 m, with side-opening windows even smaller at 600 mm or 900 mm. So you won’t find extra-large opening windows beyond these sizes.