Windows, like every other part of a building, require care and maintenance. The problems you encounter though will vary, depending on the material your windows are made of.
Timber-framed windows are desirable in period properties but are also susceptible to rot. If the wood has become soft and spongy then you know there's a problem, but the entire window unit doesn't necessarily have to be replaced. Smaller areas can be cut out and filled with putty or filler, while larger areas can be removed and replaced with new wood. Loose joints are another common problem with timber frames. Once the damage has been replaced it's possible to strengthen the corner with an angle bracket made from stainless steel.
Plastic windows have been marketed as low maintenance and many believe that they will last forever. Unfortunately, this is untrue, as plastic windows become brittle after exposure to UV rays and require replacement within three decades of installation. Another problem which can arise with plastic windows is misting up. This results from the erosion of the edge seals, which allows moisture into the cavity between the inner and outer panes. Once this happens the glazed unit will have to be replaced, if not the entire window.
Metal window frames can become warped or corroded over time. Rusty iron or steel frames might expand, potentially causing the glass to crack. If the rust is only superficial though it can be easily removed with a wire brush, while more damaged sections can be removed and replacements welded in.
Sash windows rely on a system of sash cords and pulleys to open. If this system malfunctions then they can either become jammed or slide down uncontrollably. They need to be taken out of their frames to be repaired. Broken sash cords are easy to replace though and pulleys might simply need to be lubricated. Distorted wood should be planed off.
When repairing windows, you might also decide to have double-glazing installed. This has the benefit of both muffling exterior noise as well as helping to insulate the room. But do note that if you fit double-glazing to existing sash windows then the added weight might cause problems with counterbalancing. An alternative is to install secondary glazing which opens on the inside. If you have an outside view you might want to have splashback windows installed, so that it is reflected in the glass.
Contact a windows repair service for assistance.
