A cracked or broken window is more than just an eyesore—it can compromise your home’s security, energy efficiency, and safety. Whether it’s just a small cracked window pane or completely shattered glass, knowing how to assess the damage and choose the best repair route is key for every homeowner. This guide will cover everything homeowners need to know about cracked and broken window replacement, including repair options, temporary fixes, and when a full replacement is your best bet.

Understanding Different Types of Window Damage

There are different types of window damage, and knowing which type you’re dealing with will help you choose the best repair.

Cracked Window Glass

A cracked window typically has a visible fracture in the glass surface but remains intact within the window sash. The damage can spread over time or never get any larger, but the window’s insulation value and security will be severely compromised.

Broken Window Glass

A broken window refers to a window with totally shattered glass. The glass may be missing completely, consisting of large shards of glass (for annealed glass), broken on only one of two panes (for insulated glass units), or spider-webbed for tempered glass with security film. In any of these cases, the window is no longer safe or efficient.

Leaky Windows

Leaky windows are another type of window damage that is not necessarily unsafe or less secure, but certainly less efficient. This damage occurs when the seal between the glass panes in double- or triple-pane glass windows fails, allowing the gas inside to escape, reducing its insulation value. This often shows up as condensation between the panes of glass.

A window unit with condensation inside, indicating leaky seal

Common Causes of Cracked and Broken Window Glass

  • Weather conditions: Extreme temperature changes can cause glass expansion and contraction, leading to cracks.
  • Impact damage: Accidental hits from sports balls, tree branches, or other objects can break a window.
  • Structural stress: Improperly installed window frames can put pressure on the glass, causing it to crack over time.
  • Aging and wear: Over time, glass weakens, making it more susceptible to breakage.

Temporary Fixes for Cracked or Broken Window Glass

While it’s always best to replace a window sash or have a pane replaced by an expert window replacement company, it’s not always possible right away. If you need a temporary fix, the following tips should help. Keep in mind that you should always wear protective gloves before working with cracked glass or broken glass.

Using Tape to Secure the Glass

Applying masking tape, duct tape, or packing tape over the cracked surface can help stabilize it. Cover both sides of the glass to reduce the risk of further breakage. Once taped, do not attempt to remove the tape or you run the risk of cutting yourself with loose broken glass.

Sealing Small Cracks with Nail Polish

For small cracks, applying clear nail polish, super glue, or glass adhesive can serve as a temporary repair. These compounds fill the cracked part and can prevent it from spreading temporarily, but should not be considered a permanent fix even if the damage seems to have disappeared.

Creating a Barrier with Plastic or Cardboard

Covering a broken window glass area with plastic sheeting or a cardboard panel secured with painter’s tape can help keep out debris, wind, and rain until you install a replacement pane. For added weather protection, cover the cardboard with additional tape.

A window repair technician lifts a replacement insulated glass unit into a window frame

When to Replace a Broken Window

While some cracks can be repaired, in most cases, replacing a broken pane or entire window sash is the more permanent solution. It also offers long-term safety and efficiency. For very old windows, a replacement window may be the best option.

Signs You Need Replacement Glass or a Replacement Window:

  • Large cracks or missing pieces
  • Repeated cracking despite repairs
  • Damaged window frame
  • Condensation or fogging between panes
  • Window sashes that don’t operate properly
  • Rattling windows during windy days

If you’re experiencing any of these issues, you should consider calling a window professional rather than do it yourself. A window company will find the right type of replacement glass, insulated glass unit, window sash, or replacement window to ensure you’re happy with the results.

Choosing the Right Replacement Glass

When selecting replacement glass, consider:

  • Tempered vs. standard glass: Tempered glass is more durable and shatter-resistant while standard glass, or annealed glass, breaks into large, sharp pieces.
  • Energy-efficient options: Double-pane or Low-E coated glass improves insulation, helping your home retain its conditioned air and keep the elements out.
  • Matching your home’s windows: Ensure the new pane fits your existing window frame and style. This means matching the pane style and any dividing mullions or trim to the rest of the home.

How to Install a Replacement Pane

Installing replacement glass should be left to professionals. However, these are the steps that they’ll follow for removing the existing glass and replacing it with a replacement pane.

  1. Remove the Broken Glass: Wear protective gloves and carefully dispose of sharp shards.
  2. Remove Window Stops: Remove any window stops or seals holding the glass unit in place.
  3. Clean and Prep the Frame: Scrape away old putty with a putty knife.
  4. Install the New Pane: Apply fresh glazing putty and press the replacement pane into place.
  5. Seal the Edges: Smooth the putty and allow it to dry for a secure fit. Reinstall any seals or stops, as well.

Preventing Future Window Damage

A window replacement will fix the issue, but there are a few things you can do to prevent it from happening again.

  • Ask your contractor to install impact-resistant glass to reduce the risk of breakage.
  • Apply window film for added strength and security, and if the window does break, it will keep the glass in the window frame.
  • Regularly inspect your home’s windows for early signs of damage. Any indicators of damage should be handled quickly to ensure your windows stay in top condition.
  • Keep heat-producing appliances like space heaters away from windows.
  • Have your replacement windows or glass installed by a qualified professional to ensure there aren’t unnecessary stress points.
  • Close and latch windows during storms, and ensure that your locks work properly.
  • Cut back tree branches near windows and secure loose yard items in inclement weather.

Pro Home Improvement Can Handle Your Cracked or Broken Window Repairs

If you have damaged windows that need repairing or replacing, don’t risk your safety and security on a do-it-yourself job. Contact Pro Home Improvement instead. With almost two years of experience in the home improvement industry, we’re well-versed in window repair and installation, and we can help guide you through your damaged window replacement. We’re fully licensed and insured, providing you with peace of mind and protecting your interests. Reach out to Pro Home Improvement for your window repair work today.