When It's Time to Repair Windows
If your windows require repair, it's important to be careful when working. First, put on a pair of safety gloves and cut-resistant gloves to stop glass shards from cutting you as you work.
Covering the crack with a plastic sheet over the crack is a quick fix for a cracked window. This will keep rain, snow and insects from entering your home.
Cracked Glass
Cracked window glass not only makes your home look less appealing however, it could also let drafts and other elements into the home. If the cracks were caused by an impact (like an impact from a soccer or baseball ball) or are a result of stress, for example an abrupt change in temperature it is crucial to have them fixed as soon as possible to prevent further damage and ensure that your windows are functioning properly.
If your window is cracked but not broken, a quick solution is to apply clear tape to cover it. It's an easy and affordable solution that provides protection from dust, water, bugs and other debris and keep out the weather.
If the crack is getting larger or has become extensive, it is best to consult with an expert. A professional glazier can identify the root of the crack and recommend the most effective repair method.
A crack caused by an impact is the most popular kind of window break, typically resulting from a hard object hitting your window with enough force to break it. These cracks usually have an arc of lines and broken pieces. They could be dangerous in the event that they become loose. This crack can compromise the gas that is between the panes of your double-pane windows and lower its energy efficiency.
Another kind of crack is a stress fracture, that develops slowly as time passes because of extreme temperature changes or other environmental elements. These cracks start around the edges of your window and can eventually grow into full-blown cracks.
A more serious but still feasible crack is a pressure crack. It is a curvy straight line that can stretch across the window on one or more sides. It could be caused by low or high pressure that causes the glass to expand or contract.
There are other products that can be used to repair cracks in window glass if you're willing go beyond nail varnish and tape. A product such as Glass Repair Film is a bit more expensive but will provide a bit more protection and longevity for your windows. If you'd rather take the DIY route epoxy is a sturdy adhesive that can fill cracks to stop further damage and make your window look like it never had cracks at all!
Leaking Windows
If you notice a damp spot under your window or that the wood around it appears soft or decaying, it may be the time to fix your windows. In excess moisture, it creates the perfect environment for mildew and mold, which can create a range of issues for your home. They can lead to indoor air pollution, sagging walls, and even increase the severity of allergies. If left unchecked, they can cause structural damage to your house.
If the water is coming in from the outside or is visible through the frame it's best to contact a professional to help you repair the issue immediately. Leaking windows are one of the leading causes of structural damage and mold and should not be left untreated.
In many instances caulking is a great option to stop leaks. Before applying the caulking, it's necessary clean the area and remove any existing caulking.
Check the weepholes on the frame for debris. These are designed to drain excess rainwater, however they can get blocked by insect carcasses and other debris over time.
Examine the seal between your double-paned window and the metal frame. This will help to maintain the gas from escaping between the panes, which makes windows more energy efficient. Over time the seal will be worn out and allow water to enter your home.

Another sign of a leak is the presence of water stains on the ceiling and walls. The drywall will turn discolored once it is saturated with water. You might also find peeling paint as a result of the water weakening its adhesive properties and pulling it away from the wall.
Faux Muntins & Mullions
In the past, mullions and muntins (or glazing bars in the UK) separated and held panes of glass in traditional multi-pane windows. Since bigger expanses of glass with tempered coatings became available following WWII They went out of fashion. They're mostly used as decorative elements in a few older homes.
Often it is the case that a small or even a single group of these wooden supports could get damaged by rain or wind and cause cracks to the window. The good thing is that you are able to repair most of these rotting or brittle parts.
First, clean the affected areas using a sponge and an ammonia-based cleaning agent that won't leave a residue. Get rid of any rotting or loose pieces and cut the intersections of the horizontal and vertical window muntins using an exact knife. After trimming the intersections, use painter's masking tape to tape off the lower portion of the window frame. Apply a thick layer of white paint to the areas you lightly painted in the initial pass. Allow the paint to dry completely before removing the tape and applying a second coat.
If you're experiencing an issue that is more serious, such as cracks that create an hourglass-like shape in the center of the window, it's recommended to replace the sash. In double glazing Watford , it's important to find an alternative window that is in line with the style and size of the current one.
To save money you can install an attached grid window. These windows are made of a full glass pane that has a series of muntins that are fixed to the surface. This gives them a divided appearance. They're not as efficient as traditional windows, but they are.
Installing a drip cap will prevent water from leaking into the window frame. You can purchase a range of these drip caps made of aluminum at the majority of home centers for around $20. They're a lot easier to install than a replacement window sash, and they'll provide you with the same functionality as an authentic muntin or mullion.
Broken Sashes & Frames
A broken window sash should be a signal that you should contact a professional. If not taken care of the broken sash may cause water leaks, wood rot and more serious issues with the frame and sill. If you have a damaged sash, replace it as soon as possible to ensure that the window is sealed.
Often, the problem is caused by worn out or poorly installed cords for sash. It is easy to replace these cords in most double-hung window models. To start, you'll need to take off the tabs of metal that keep the sash in place. To do this push up on one side (it does not matter which side) of the sash and then pull it toward the opposite side to remove it from the window frame. To access the sash cords, you'll need to remove the strip of separation that separates the sash.
After you've removed your sash, you must make sure you examine its metal tabs against the tabs on the new sash. If they're different it can be difficult to place the new one in its place and impact how the sash operates. Fortunately, this issue can be rectified by placing tabs in their proper places on your new window.
In addition to the sashes, you'll also need to check the frame of your windows for damage or rot. It's a good idea to do regularly, as wood will shrink and break down as time passes. If you notice any visible damage it should be addressed as soon as you can to avoid an even bigger issue from arising.
If your window frames have deteriorated, you can treat them using a homemade preserver made with half mineral spirits and boiling Linseed. After the treatment has dried for two full days, you are able to re-finish your frames using a high quality latex paint. A fresh coat of paint can also shield your window from the elements.