Did you find something that would work for you yet? There are a few options here: https://www.houzz.com/photos/transparent-roof-phbr0lbl-bl~l_47649

New, dual pane energy efficient windows is the way to go. Not only is it a sound barrier it will keep the heat/cold in. We replaced our windows..twice..now, I can't hear the phone ring when sitting on the patio and our heating/cooling bills have decreased significantly as well.

A thick concrete wall can keep your house cool. Steel will make your house hot unless you insulated the walls well. Insulated walls don't work very well in a flood zone. When they get wet, you need to tear them apart. You will need concrete for the foundation most likely unless you are driving steel pylons. There is probably a combination of the two that will suit your needs best. It would be helpful to know what you want to achieve by using steel. There are advantages to both. Steel floors can be cantilevered further. It is easier to make bigger window openings. Floor and roof spans can be lighter and quicker to build with steel, but the roof will get hotter and therefore need good insulation and need to be well ventilated. These are just general assumptions of certain building practices so that you know what to ask people where you live. The practices and resources vary from place to place and building something for a specific purpose can change the benefits of one material or the other. My best guess is that you will probably want to use both.

Hello All, For a top floor apartment(18th floor), what are the heat resistant or insulation options that I can implement(ceiling, color, etc.). It goes upto 40-43 deg C in summer here. Thanks!