At Siding & Windows Wizards LLC we like to take care about people's houses and like to share ideas about vinyl siding, replacement windows, fiber cement siding, roofing, or anything else that can make people's life easier.
Back to Blog
Every part of the replacement window is important. In many cases you replace your old windows, because you couldn't open or close them. Every window is as good as it balance system. So let’s have a look what types of balance systems are used in replacement windows.
Block and Tackle Balance System
This type of balance system uses composite cords to connect the coil spring to the balance shoe. Many manufacturers guarantee, that you can use window sashes for about 28000 times. The big plus of the block and tackle balance system is that it does not need lubrication. So you don't have to worry about your window sashes getting stuck. The minus of this system is that it can be used in double pane glass windows. It can’t be applied to triple pane glass windows.
Constant Force Balance System
This balance system works by utilizing a rolled coil steel spring to counter the balance of the weight of a window sash. Constant force balance system is widely used. Both in double and triple pane replacement windows. Many manufacturers guarantee that both sashes can be opened and closed for up to 15000 times. The negative side of this balance system is that all the dirt and dust accumulates in spring casing. It makes the operation of the window harder. Replacement windows with constant force balance systems may need maintenance after 20-25 years.
Spiral Balance System
The spiral balance relies on tension applied to spiral rod inside a balance tube. When you open or close the window, some tension is applied by turning the spiral rod that extends out from the bottom of the tube counter clockwise. Spiral Balance system was widely used in replacement windows. Lately most window manufacturers switched to constant force or block and tackle balance systems. The main problem with this balance system is that it provides of up to 1000 cycles of usage. The more you use the window the weaker the spiral spring becomes and sashes are not stay open, they fall down. The other negative side of this balance system is that it needs lubrication from time to time.
14 CommentsRead More
4/25/2017 09:10:37 am
I have spiral balance system in my windows, some of the windows are very difficult to open. Is any way to fix them?
4/25/2017 09:38:49 am
Hi James, to make your Windows work better, you can try oil the balance system with a bit of lubricant or WD40
9/1/2018 10:48:27 am
Need assistance reinstalling the window into the block and tackle window manufactured by defunct Gorell. Any ideas, weird pin shape socket movement makes it difficult. Thanks Mike
9/1/2018 02:58:16 pm
Hi Mike. Do you have any pictures of that balance system ?
9/1/2018 04:03:34 pm
Internal pictures or the sash frame and attached pin and socket??
9/1/2018 04:12:09 pm
What happens is the pin is keyed and the socket has corresponding notch in the socket that accepts the pin. Consequently the pin must enter the slot in the identical position for both slots. When the frame is twisted and removed the upper slot is out of position to accept the keyed pin. The slot mechanism will not move downward unless the pin is inserted. If the upper pin is inserted into the slot then it takes two people to maneuver the window downward to the exact position for the downward pin to enter the slot. There is only one of me. To make matters more complicated the slot mechanism is unpredictable in its movement pattern and ease of movement. Thanks Mike
9/1/2018 04:30:58 pm
Mike, i have a youtube video how to fix sash that doesn't stay up, i use a screw driver to turn the lock of the shoe so it can receive the pin. That's the link https://youtu.be/s5m0engxFbA
9/1/2018 05:17:01 pm
6/19/2020 05:26:33 pm
I have a spiral balance system that has disconnected on both sides of the window and I can't figure out how it connects back on to the window. The window has a metal bottom and looks like the Balance end might clip on somehow. Plus how do you lubricate it with WD, do you spray the inside of the Metal Tube?
6/23/2020 06:49:18 am
10/29/2020 07:58:10 pm
I have a vinyl window with spiral balance system and it looks like one (plastic?) pin broke. Can it be fixed?
10/30/2020 09:49:39 pm
10/30/2020 10:22:11 pm
Thanks for the reply, Andre!
11/1/2020 08:39:41 pm
Leave a Reply.