When it comes to needing information on a particular subject, it is always best to talk to an expert. So when we wanted to find out information on what makes good uPVC windows, we decided to talk to some home improvement experts, in order to get their opinions and a few pointers. We were surprised to find out just how much information can be gleaned from a window label in a salesroom.
The first item of information we were told to look out for on the label was the U-factor of the window unit. This is a very important measurement, as it tells us about the rate that the window transfers heat. As you want a slow heat transfer from a window, the lower the measurement or score that a window gets, the better.
Next the experts told us to watch out for an air leakage score. This is an optional measurement and the manufacturers may not have it on the label. However it does tell you of the ability of the window to block air from getting into the home for the outside. A low air leakage score is what you want to see.
The solar heat gain coefficient of a window sounds like a mouthful, but it is simply a measurement showing how capable the window is at blocking heat from the sun. This is an important measurement, as it will show the ability of your windows to prevent heat build-up in the home.
Visible transmittance measures the ability of the window to allow in light. As one expert said, having a window that blocks the heat is not a lot of good if it blocks all of the light also. What you want is a good combination of heat blockage and a window that lets in a lot of daylight.
The experts advised us that it is compulsory for some of this information to be on the labels for the uPVC windows, but that other measurements were optional. However if the questions are asked, the manufactures will provide the information. This is the best way to ensure that you get good quality windows for your home
