3 Types of Glass Window Cracks (And Ways to Repair Them)

November 1st, 2021

Not all cracked windows are an eyesore (yet), but they can cost you money if left unchecked. The first step is finding out what kind of crack you are dealing with. Knowing this can help you determine if a glass window repair is available for your Toronto home or if it needs to be replaced entirely.

At Academy Glass, we offer prompt and efficient glass repair services in Toronto. Here are the three most common types of window cracks and our suggestions on how to repair them.

3 Common Types of Window Cracks & How to Fix Them

Depending on your window frame, repairing window glass is a challenging task. This guide will outline different types of cracks and teach you how to fix a broken window in just a few simple steps.

Stress Cracks

In most cases a stress crack will start small, typically near the edge of the window. Over time it will expand and spread, resulting in a bigger issue than you may have anticipated. These cracks are most often caused by extreme fluctuations in temperature. For example, when it is extremely cold out, you may use a heater to stay warm, and this drastic fluctuation may eventually lead to a crack.

These stress cracks may also appear due to physical distresses, such as slamming your window shut. Always treat your windows with care to avoid a self-induced stress crack that will require costly repairs.

Pressure Cracks

A pressure crack is probably the least common type of break in a window. It mostly occurs in double-paned windows or insulated glass and is caused by drastic shifts in pressure due to extreme weather. It may also happen if windows are installed too high or low. Windows cannot withstand the pressure of these scenarios and will crack as a result. You can tell that a pressure crack has occurred due to the shape of the break in the glass. In most cases, the crack will follow a curve in the shape of an hourglass.

If you see a pressure crack, you will most likely have to do a complete window replacement.

Impact Cracks

An impact crack is probably what first comes to mind when you think of broken windows. As the name suggests, an impact break is caused by the force of an object hitting your window. You can usually tell when this kind of crack has occurred thanks to the identifiable starburst pattern that spreads outwards from the point of collision.

How to Temporarily Fix a Cracked Window

How to Temporarily Fix a Cracked Window

Repairing broken glass in a window is usually only a temporary fix. There are some simple and quick fixes but the only safe and permanent way to fix cracked glass is to replace it.

1. Masking Tape

Apply masking tape to either side of the crack. This will help to keep the glass intact and prevent it from breaking further, while simultaneously preventing water from leaking through. Make sure to extend the tape past the crack on both sides, pressing it firmly into the glass for best results.

2. Glass Adhesives

Glass adhesives that are typically used on car windshields may also be used for emergency glass repair in your Toronto home. Thoroughly clean the break, flushing out any potential debris with an eyedropper before applying tape to the back of the crack. This will keep the adhesive from leaking out the opposite side of the window. Use a syringe or brush to apply the adhesive to the crack and let it dry completely before removing the tape.

3. Thick Plastic Cover

If you’re looking for a temporary solution that will keep out bugs or pollutants, apply a thick plastic covering on top of the window crack. Cut a piece of plastic from a shower curtain, tarp, shopping bag, or other household item large enough to cover the surface of the broken glass. Use duct tape to adhere the edges of the plastic to the glass.

How to Permanently Repair a Cracked Glass Window

How to Permanently Repair a Cracked Glass Window

Solvent-based adhesives like epoxy can be used as a sealant for broken glass windows. It’s an excellent way to keep the glass intact and prevent further damage. Check out this step-by-step guide on how to fix cracked windows using epoxy.

  • Clean the glass using liquid dishwashing soap and a damp microfiber cloth to remove any dust, fingerprints, or oil residue. Leave it for a few minutes to allow it to completely dry.
  • Create a mixture of two-part epoxy by combining the hardener and resin. Use a toothpick to stir as well as blend the solution on a disposable cardboard or paper plate.
  • Apply the epoxy mixture to the broken glass using a putty knife, pressing gently to fill up the cracks. Leave it to dry for at least five minutes.
  • Get rid of any excess epoxy protruding on the surface using a sharp blade or a few drops of acetone on cotton or a dry cloth.
  • Polish your glass window using a glass cleaner and a clean rag.

For minor cracks, this DIY approach can work temporarily. But for complicated, risky issues and permanent solutions, call in a pro. Remember, even if you think that small crack isn’t that bad, it will only worsen with time. Whether it is a minor or big crack, consulting an expert glass repair company in Toronto is always advisable. Academy Glass can take care of your window glass repair, installation, and maintenance needs. Our expert technicians will be able to assess the situation and recommend the best course of action.