Anytime you need window repair or residential glass replacement make sure you call someone who specializes in window replacement and repair and knows what he is doing. It's better if you replace your old drafty windows with new quality windows which will save you money on your utilities. It will keep the cold out in the winter and keep you cooler in the summer. But if you can't afford residential glass replacement, you can still improve the energy efficiency of existing windows.
Here are some tips on how you can improve the existing windows. First of all you should start by checking for air infiltration or leakage around the window frames and this way you can discover if you have any gaps or cracks that allow warm or cold air to leave or enter the house. But this isn't a major problem because it can be fixed inexpensively with weather stripping and caulk. Another method is by applying a window film to the glass to reflect harsh sunlight. Films are generally made of polyester or thin plastic applied to the window's interior by homeowners or glued to the surface by professional installers. So, as you can see, when it comes to window repair you might still need specialists. At least you know you are getting quality work.
Older windows that are drafty, sagging and refuse to open often suffer from lack of maintenance rather than poor workmanship. Depending on the problems you have you can always call a window repair specialist or a residential glass replacement contractor. Just think about your safety. You can't allow an intruder break into your home via a glass window.