Should You Use Plexiglass to Replace a Window? Pros and Cons

When faced with replacing a broken or outdated window, many homeowners wonder if they should opt for plexiglass as an alternative to traditional glass. Plexiglass, a form of acrylic, is known for its lightweight, durable, and shatter-resistant properties, making it a popular option for various projects. However, replacing a window with plexiglass comes with both benefits and drawbacks that should be considered before making a decision.

In this post, we’ll explore whether plexiglass is the right material for window replacement by discussing its durability, clarity, insulation capabilities, and overall cost.

 

Durability: Why Plexiglass Outlasts Traditional Glass

One of the key reasons people choose plexiglass for window replacement is its superior durability compared to standard glass. Plexiglass is about 17 times more impact-resistant than glass, which makes it an excellent choice for areas prone to high traffic, storms, or accidents.

For families with children or pets, plexiglass offers a safer alternative, as it’s far less likely to break or shatter under pressure. This strength makes it a go-to choice for schools, playgrounds, or homes located in areas where severe weather can cause damage to traditional windows.

When Durability is a Deciding Factor

  • High-impact environments: Schools, sports facilities, or homes with active children.
  • Areas prone to hurricanes or severe weather: Plexiglass won’t shatter like glass, reducing the risk of injury from broken glass.
  • Vulnerable entry points: Doors and windows that may be at risk of forced entry can benefit from plexiglass’s resilience.

 

Clarity: How Plexiglass Compares to Glass

Plexiglass is transparent and offers excellent clarity, much like traditional glass. When installed, the average person might not even notice a visual difference. However, over time, exposure to ultraviolet (UV) rays can cause plexiglass to become yellowed or cloudy, especially if it lacks a UV-resistant coating.

This gradual yellowing can affect the overall appearance of your windows and reduce visibility. To counteract this, many plexiglass sheets are treated with UV-resistant coatings, though these may add to the cost.

Key Considerations for Window Clarity

  • Short-term clarity: When first installed, plexiglass can look as clear as glass.
  • Long-term clarity: Over time, especially with sun exposure, untreated plexiglass can yellow.
  • UV protection: Invest in UV-resistant plexiglass if you’re using it for windows exposed to direct sunlight.

 

Cost Comparison: Plexiglass vs. Glass

In terms of initial cost, plexiglass is often a more affordable option than glass, particularly for larger windows or custom shapes. Additionally, plexiglass is lighter, making it easier (and sometimes cheaper) to install.

However, over time, plexiglass may require more frequent maintenance due to scratching or yellowing, which could result in higher replacement costs in the long run.

Pros and Cons of Plexiglass Cost

  • Lower upfront cost: Plexiglass is generally cheaper to purchase and install than traditional glass.
  • Maintenance expenses: Plexiglass may need to be replaced or polished more often due to wear and tear.
  • Customization: Easier to cut and shape than glass, plexiglass is a good choice for custom or unusually shaped windows.

 

Insulation and Energy Efficiency

While plexiglass offers several benefits in terms of durability and cost, it falls short when it comes to insulation. Traditional double-pane glass windows are designed to insulate homes more effectively, reducing energy costs and maintaining a consistent indoor temperature.

Plexiglass, on the other hand, doesn’t offer the same level of thermal insulation. Homes in colder climates may experience higher energy bills if plexiglass windows are used. To combat this, some manufacturers offer double-pane plexiglass options, but these tend to be more expensive.

Considerations for Insulation

  • Energy efficiency: Glass is superior to plexiglass in terms of insulating properties.
  • Cost of heating/cooling: Homes with plexiglass windows may see increased heating or cooling costs.
  • Climate: If you live in a mild climate, plexiglass’s lack of insulation might not be a major issue, but it could significantly impact homes in extreme weather conditions.

 

Safety and Shatter Resistance

One of the biggest advantages of plexiglass over glass is safety. Plexiglass doesn’t shatter like glass does, which makes it an ideal choice for locations where safety is a concern. If a glass window breaks, the shards can cause severe injuries. Plexiglass, by contrast, will only crack rather than shatter into sharp pieces.

This makes plexiglass particularly appealing for use in schools, daycare centers, and homes with children or pets. It can also be beneficial in storefront windows or other public-facing locations where vandalism might occur.

Situations Where Plexiglass Safety Shines

  • High-traffic environments: Where children, pets, or sports may increase the risk of breakage.
  • Commercial or retail use: Storefronts and public buildings benefit from the shatter-resistance of plexiglass.
  • Home safety: Families looking for added security in playrooms or near pool areas may find plexiglass ideal.

 

Scratch Sensitivity and Maintenance

One downside of using plexiglass to replace a window is that it’s more prone to scratching than traditional glass. Even light cleaning can cause superficial scratches if not done carefully. Special cleaners and scratch-resistant coatings can help, but they may increase costs.

In contrast, glass is much more resistant to minor abrasions, making it a lower-maintenance option for areas where scratches could be an issue.

Plexiglass Maintenance Tips

  • Use soft cloths and non-abrasive cleaners to avoid scratching.
  • Consider purchasing plexiglass with a scratch-resistant coating.
  • Regularly check for signs of wear and be prepared for occasional replacements.

 

Key Takeaways

  • Durability: Plexiglass is highly impact-resistant, making it a safer, more durable option than glass.
  • Cost: Initially cheaper than glass, plexiglass may require more frequent maintenance and replacement.
  • Clarity: Plexiglass offers excellent short-term clarity but may yellow without UV protection.
  • Insulation: Plexiglass doesn’t insulate as well as double-pane glass, which can lead to higher energy costs.
  • Safety: Plexiglass is safer due to its shatter-resistant nature, ideal for homes with children or high-traffic areas.
  • Maintenance: More prone to scratching, plexiglass may require special cleaners and coatings for longevity.

 

FAQs

1. Can plexiglass be used in all types of windows?

Plexiglass can be used in most window types, but it’s best for smaller windows or non-insulated areas. For large windows or areas where energy efficiency is crucial, glass may be the better option.

2. Does plexiglass provide good insulation?

No, plexiglass doesn’t provide the same level of insulation as double-pane glass. Homes in extreme climates may experience higher heating or cooling costs if plexiglass is used.

3. How can I prevent plexiglass from scratching?

Use soft, non-abrasive cleaning materials, and consider purchasing plexiglass with a scratch-resistant coating for added protection.

4. Is plexiglass a good window replacement?

Plexiglass can be a good window replacement for temporary or less critical applications, as it is shatter-resistant and lightweight. However, it scratches more easily and doesn’t provide the same insulation or longevity as traditional glass.

5. Can I put plexiglass over my windows?

Yes, you can put plexiglass over your windows to add an extra layer of insulation or protection. It’s often used for storm windows or draft-proofing, though proper mounting is required to prevent moisture buildup.

 

By weighing the pros and cons of plexiglass, homeowners can make an informed decision about whether it’s the right choice for their window replacement needs.

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