When It's Time to Repair Windows
It is important to be cautious when you are repairing windows. First, you should wear a pair of safety gloves and cut-resistant gloves to prevent shards of glass from cutting you during your work.
An easy solution to a damaged window is to apply a plastic covering over the crack. This will prevent rain, snow and insects from getting into your home.

Glass that has cracked
Glass that has cracked can make your home look less appealing and let drafts to enter. The cracks could be caused by an impact (like the impact of a soccer or baseball ball) or are the result of stress, like a sudden change in temperature or a sudden temperature change, it's crucial to get them repaired as soon as you can to avoid further damage and ensure your windows are working effectively.
If your window is damaged but not broken, a simple solution is to apply clear tape to cover it. This is a cheap and simple solution to shield your window from water, dust, bugs and other sand. It also shields your windows from the weather.
If the crack is extensive or is getting worse, it's best to consult a professional. A skilled glazier can identify the root of the problem and recommend a suitable repair procedure.
An impact crack is the most popular kind of window break, typically resulting from a hard object striking your window with enough force to fracture it. The cracks typically have a starburst of lines and broken pieces. They could be dangerous in the event that they become loose. The crack could compromise the gas in the panes of your double-pane window and reduce its energy efficiency.
Another type of crack is a stress crack, that develops slowly as time passes due to extreme temperature fluctuations or other environmental elements. These cracks usually begin near the edges of your window, and eventually can develop into complete breaks.
A more serious but still feasible crack is one that is a pressure crack. This is a curvy, curve that extends across the window on one or more sides. It can 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 to go further than nail varnish and tape. A product like Glass Repair Film is a little more expensive, but will provide a bit more protection and durability for your windows. If you'd rather DIY epoxy is an adhesive that can be used to fill in cracks and stop further damage. It will make your window appear like it never had any cracks in it at all.
Leaking Windows
If you notice a damp spot under your window, or notice that the wood around it is brittle or rotting, it could be time to consider a window repair project. Mildew and mold thrive in excess moisture and can cause various issues within your home. They can affect the quality of indoor air, lead to sagging drywall and even worsen allergy symptoms. If left unchecked, they can also cause structural damage to the house.
If the water is coming in from outside or visible through the frame it's best to contact a professional to help you repair the issue right away. Leaking windows are one of the main causes of structural and mold damage So don't leave them untreated.
In many cases the use of caulking is to stop leaks. You'll need to carefully clean the area first though, and remove any old caulking before applying a new layer.
Check the weepholes of the frame for debris. These are designed to drain excess rainwater, but they can become clogged with insect corpses and other debris in time.
Check the seal between your double-paned windows and the frame made of metal. This will help to maintain a barrier of gas between the panes, making the windows more energy efficient. The seal could wear down over time, however, and let water enter the home.
Another indication of a leak is the presence of water stains on ceiling and walls. These are caused when the wall is soaked with moisture which weakens the fibers, causing discoloration. Peeling paint is another indication of water altering the adhesive properties of the paint and removing it from the wall.
Faux Muntins & Mullions
In the past, muntins (or glazing bars as they are called in the UK), separated and were used to hold the panes of multi-paned windows. Since larger expanses of glass that were tempered became available after WWII They went out of fashion. Today, they're mainly used as a decorative element in some older homes.
Sometimes just a small or a single group of these wooden supports can be damaged by rain or wind and cause cracks to the window. You can repair the majority of these brittle or rotting elements.
First, clean the affected areas using a rag and an ammonia-based cleaner that won't leave any residue. Remove any loose or rotting parts and use an exacta-knife to reduce the intersections between vertical and horizontal painted window muntins. After trimming the intersections using painter's masking tape, you can use the tape to seal off the lower part of the window frame. Apply a thick layer of white paint to the areas that you lightly painted in the first stroke. Let the paint dry completely before removing the tape and applying a second coat.
If the problem is more severe like an hourglass-shaped crack in the middle of the window, it's better to replace the sash. In these situations it's crucial to find a replacement window that matches the design and size of the current one.
To save money you can install an attached grid window. These windows consist of a complete glass pane that has a series of muntins that are fixed to the surface. This creates a divi-sected appearance. These windows are not as energy-efficient as traditional ones.
If you're looking for an easy way to update your windows, consider installing an additional drip cap to stop water from getting into the window frame. There are a variety of these drip caps made of aluminum at many home centers for less than $20. They're much easier to install than an alternative window sash and come with the same functions as a genuine muntin or mullion.
Broken Sashes & Frames
A broken window sash should be a sign that you need to call for help. If not taken care of the broken sash may cause wood rot, water leaks and more serious issues with the frame and sill. If you've damaged your sash, replace it immediately to ensure that the window is sealed.
The issue is usually caused by worn-out or improperly installed cords. Fortunately, replacing them is quite simple and is possible in all double-hung windows. First, you'll need to take off the tabs of metal that hold the sash. To do this, push up on one side (it does not matter which side) of the sash and then pull it toward the other side to remove it from the window frame. To access the sash cords, you'll need to remove with care the strip that separates the sash.
It's important that you examine the metal tabs of the old sash to those of the new one. If they're different it's difficult to put the new one in its slot and could affect the way it functions. Fortunately, this can be easily fixed by placing tabs in their proper places on your new window.
In addition to the sashes, you'll also be required to inspect the frame of your window for problems or rot. It's a good idea to do regularly, as wood will shrink and break down over time. It is important to repair any visible damage as fast as you can to avoid a more serious issue.
If your window frames have begun to deteriorate, you can treat them with a homemade preserver created from half mineral spirits and boiling Linseed. After the treatment has dried for a total of two days, you can restore your frames with high-quality latex paint. A fresh coat of paint can help to protect your window from the elements too.