Last Updated on July 18, 2025
A small crack in a window may appear insignificant at first, but it can quickly worsen over time, posing a safety risk to those in the home. While temporary fixes might offer a short-term solution, the damaged glass should ultimately be replaced by a professional window repair service to ensure long-term safety and durability.
Why does window glass crack?
Cracked window glass can result from several factors, with impact cracks being the most common. A stray baseball from a neighbor or a rock kicked up while mowing the lawn can easily cause the glass to crack. Similarly, weed eaters can also send debris flying, leading to potential damage.
Stress cracks commonly occur due to temperature fluctuations. When one side of the window is shaded by trees and the other is exposed to direct sunlight, it creates conditions for stress cracks. Similarly, window glass cracks as a result of hot daytime temps and dramatically low nighttime temps.
Temperature variations cause the glass to expand and contract. Stress cracks are also possible when homeowners slam a window shut. Using excessive force to close the window puts stress on the glass, producing stress cracks. Severe weather may also send debris flying into the glass and cracking it.
How do homeowners fix cracked window glass?
Minor cracks in the window glass can be repaired by homeowners via DIY methods. Although DIY fixes yield temporary success, the glass is likely to require further attention in the future. If the cracked glass undergoes additional damage, a glass replacement will be necessary.
1. Apply Glass Adhesive
Glass glue is a savior when guests are expected, and the crack is an eyesore. Wear gloves to protect the hands and ensure the room is well-ventilated to prevent inhaling the glue’s fumes. Prior to applying the glass adhesive, clean the window with soap and water and dry the surface.
Position the glass pieces on the window, then apply the glue in the gaps and over the cracks. Give the adhesive time to cure, which can take up to 24 hours, depending on the type of adhesive used and the environmental conditions. Warm outdoor temps accelerate the curing process.
When working with glass adhesives, be aware that different types vary in their ability to resist heat. Many glues are not heat-resistant and fail to withstand high temperatures. As a result, utilize the glass glue method when environmental conditions are favorable.
2. Apply Epoxy
As in the first method, clean the glass thoroughly with dish soap and water. Wipe away any water droplets using a clean rag. Also ensure the glass is free from fingerprints, oil, and any other substance that can interfere with the proper application of the epoxy.
Prepare the two-part epoxy, which consists of both a hardener and a resin in separate containers. Do not mix the epoxy prior to cleaning the glass. Scoop equal parts of the hardener and resin onto a piece of cardboard and mix them with a toothpick for at least 30 seconds.
Apply the epoxy with a putty knife immediately after mixing—homeowners have a short window of 10 to 15 minutes to perform this step. Press the epoxy over the cracked areas, being sure to avoid putting excessive pressure on the glass.
Leave the epoxy undisturbed for 10 minutes to ensure a secure bond within the glass. The adhesive reinforces the glass, reducing the likelihood of the window breaking. Remove any excess epoxy with a razor blade or use acetone to wipe it away. Polish the glass with a commercial glass cleaner.
3. Apply Masking Tape
In an emergency situation, masking or duct tape can be used to hold the cracked window glass together until a more viable repair method is available. Tape creates a short-term barrier to prevent the cracks from allowing hot or cold outside air into the room.
Tape is also useful when the cracked window glass is at risk of breaking. This method temporarily secures the glass and prevents additional damage until a more permanent fix can be arranged. Masking tape fails to be aesthetically pleasing but it does perform for the short-term.
4. Replace the Glass
Replace the glass entirely when the abovementioned methods are ineffective. Homeowners can attempt a DIY replacement; however, hiring window replacement professionals is recommended to achieve the best results. A replacement is especially advised when the crack is major and creates a hazard.
Fix cracked window glass promptly, as neglecting to do so can lead to several drawbacks. The energy efficiency of the home is compromised, as the cracks allow hot or cold air indoors. Plus, the home’s appearance is marred by unsightly window glass cracks.
Window Glass Repair and Replacement from Arax
While applying window glue, epoxy, or masking tape can repair minor cracks in window glass, it’s best to seek the professional services of a window repair company to ensure your window performs as it should. Arax Windows Work provides top-notch window glass replacements and repairs.
Whether your home is traditional or modern, our glass specialists skillfully work with windows of all shapes and types to restore their visual appeal and return optimal functioning. We fix single, double, and triple pane windows, all while preserving your windows’ unique design.
We offer homeowners a wide range of services, such as skylight glass replacement and replacement of custom-shaped window glass. In addition to working on residential windows, our professionals serve area businesses with high-quality commercial glass window replacement and storefront glass replacement.
Upon contacting us, a window specialist will be dispatched to assess the crack. We offer expert advice on whether the glass can be repaired and the best available methods to successfully do so. If we determine the glass can be repaired without replacement, we perform an effective window glass repair.
When a crack compromises the appearance and functionality of your windows, do not hesitate to consult the pros at Arax Windows Work. Arax services windows all throughout Chicagoland including Wood Window Repair in Homer Glen, IL. Call our Cary office today to restore the efficiency, security, and aesthetic appeal of your windows.
