Funny that you should ask. It is one of the most misunderstood components in the construction of steel windows and door. In almost all cases they are NOT made out of steel. You wouldn’t know to look at them because they are painted to match the hot-rolled steel profile sections. What you see is paint not steel but then again, you never see the steel of steel windows either.
To make the best decision about anything, you need to identify your goal before you begin. Most of the time this means that you have a single vision or concept about what your life will be like when this goal is attained and some idea about what it will look like. This process identifies like a sniper, laser focused on our original vision and how to ascertain it.
Yesterday, I had the pleasure to meet a project architect from a firm I have worked with for many, many years on a job site. We showed some samples and discussed her project’s design intent and special needs. It was a lot of fun for me because I have not done a lot of site meetings in the last few years.
The steel window and door industry has long been resistant to adding thermal insulation to their products. We need a little history here to help explain the reasons behind the reluctance.