Thermal Gard Double-Hung Season-All Window - Spiral Tilt Window Balances

Question

Hello, I am not sure which length and strength I need to install to replace the spiral tilt window balances in my Thermal Gard windows. As you can see from the photos, the existing balances are of varying lengths, which suggests that someone already did some repair work. One is 21" long, one is 22", and another is 25". These all came out of the same window. The 25" balance has a reddish brown end, and the 21" balance has a green end. The 25" balance came out of the front/bottom sash, and the shorter ones came out of opposite sides of the upper/rear sash. So the question is, which length and color is the correct one? The outer dimension of the sash height is about 25.5" if that helps.

User submitted photos of a window balance.

Paul · Accepted Answer

Hello! It definitely looks like someone did some on-the-spot repairwork, yes. Do you have another Thermal Gard window in the house that is the same size? That would be a good point of reference, assuming all the hardware there is original.

If not, I will need some more measurements. Please tell me the height and width of the visible glass for both the top and bottom sash. Then, please remove each sash and place them on a scale, then tell me their weight. Knowing the size of the visible glass and the weight of each sash will allow me to determine what length and color bearing you need for your balances.