If You have a familiar sound that comes from the house and you cannot figure out where it is coming from, it is high time you check the windows, probably the window could be broken and letting a funny sound making it difficult to open and close, for more view here.
Sometimes the windows can become difficult to open and close and if the drafts can be felt coming through the window and if there is visible damage like chippings, cracks then it high time that you plan for window replacements.
If there are possibilities that you are hearing a lot of noise coming from the surroundings, then your windows are not providing suitable protection from the outdoor sounds since they may not be sealed correctly but poorly,view here.
Do you sometimes feel a draft even when you have closed your windows? If the answer is yes, then there could be a tone of issues like poor installations and faulty seals that could be letting the breeze inside the house, a draft window changes the inside temperature of your house and may cause the HVAC system to work twice more that they are required.
To know when it is the right time for window replacement it is when you have soft window frames, chipped and water damages as well and this means show that are damaged beyond repair and therefore need to be fully replaced also if the window frames are sagging, it is time to have the windows replaced,view here.
When you experience closing and opening difficulties for your windows it is time to have replacement done since windows that are not installed properly have balancing issues that could be as a result of poor installations,for more view here.
If you have rusty and rotting windows, then it is high time to have the windows replaced since they could compromise the safety of your home by a high margin.
If the windows have started to have frosting in between the glass layers then the seals have failed and the energy that makes the windows to be self-sufficient has also gone making them faulty.
If you are never comfortable at your home because there is a certain window that lets in cold air,view here, then it is high time to have the windows replaced and this could be serious since in cold winters the air could be so cold prompting you to have large power bills so as to make the temperature in the house conducive ,however with suitable replacement of the window the problem is solved instantly.