Shattering the Myths: The Real Difference Between Impact and Non-Impact Windows

Joe Underwood • July 3, 2025

From Safety to Science — Understanding Which Window Type Is Right for Your Florida Home

🌀 Florida Weather Demands Serious Protection

If you’ve lived in Florida longer than a cup of iced tea can melt on your porch, you know we don’t play around when it comes to hurricanes. In this great state of sunshine, saltwater, and sideways rain, your windows aren’t just for looks — they’re part of your home's survival strategy.

That’s where the eternal debate begins: Impact vs. Non-Impact Windows.

Which is better? Which is safer? Which costs more? And here’s the real kicker — are you just paying extra for peace of mind, or is there real science behind it?

Buckle up, because this blog post from Windoor Retro Professionals is about to shatter more than a few myths — and maybe a few outdated assumptions — about your window options.

We proudly serve Ocala, Gainesville, Tampa, Orlando, Saint Petersburg, Crystal River, Inverness, Citrus Springs, Homosassa, Hernando, and all surrounding areas. So let’s get into the nitty-gritty.

💥 What Are Impact Windows?

Let’s start with the basics.

Impact windows are engineered to withstand hurricane-force winds and flying debris. These aren’t just your grandma’s storm shutters — they’re windows with muscle.

🔬 How it works: Impact windows are built using laminated glass — two panes of glass bonded with a tough, clear plastic interlayer (usually polyvinyl butyral, or PVB) that holds the glass together even if it cracks.

This technology is similar to what’s used in your car’s windshield.

Benefits of Impact Windows:

🛡️ Withstands wind-borne debris up to 150+ mph
🚫 Prevents glass from shattering into dangerous shards
🧯 Acts as a barrier against intruders
🔇 Reduces noise pollution significantly
🔥 Some models have fire-retardant features
💰 Can lower homeowner’s insurance

🪟 What Are Non-Impact Windows?

Non-impact windows are traditional windows that do not include laminated interlayers or enhanced pressure-resistant framing. They may be double-pane and energy-efficient, but when it comes to hurricane resistance, they’re basically your window’s version of a paper towel.

Now, that’s not to say they’re bad. In fact, non-impact windows still serve many Florida homes quite well — when paired with shutters or other hurricane protection systems.

Benefits of Non-Impact Windows:

💸 Typically more affordable up front
🌞 Available in a wide range of styles
✅ Easier and faster to manufacture and deliver
🧰 Often simpler to install for retrofit projects

But… they don’t stop a two-by-four hurled at 100mph. They’ll likely shatter — and worse, compromise the structural envelope of your home, which is where the real danger begins during a hurricane.

🔬 The Science Behind Laminated and Tempered Glass

Let’s talk about glass like nerds for a minute.

💎 Laminated Glass (Impact Windows)

2 sheets of annealed or heat-strengthened glass
A plastic interlayer like PVB or SGP (SentryGlas Plus)
The interlayer holds the glass together when struck

🔬 Result: Even if the glass cracks, it stays in place. That’s why your windshield doesn’t cave in during a fender bender.

🔥 Tempered Glass (Optional in Some Impact Windows)

Tempered glass is heat-treated to be 4–5x stronger than regular glass. When it breaks, it shatters into small, blunt chunks instead of jagged shards.

Many premium manufacturers use BOTH tempered and laminated glass in their impact window designs. Why?

🔩 Tempered glass gives strength
🧷 Laminated layers give retention and impact resistance

This combo is like putting a bodybuilder in Kevlar. You’ve got power and protection.

🏢 Who’s Doing It Right? Top Manufacturers for Impact & Tempered Windows

Not all impact windows are created equal. Some manufacturers go the extra mile — or don’t go far enough. Here are a few of our preferred and trusted names we often recommend and install:

✅ Eastern Architectural Systems – Excellent design pressure ratings, customizable options
✅ CWS by Pella – Strong Florida presence, reliable impact and energy ratings
✅ PGT Innovations – Florida-born and raised, they’re industry leaders in impact design
✅ Viwinco – Independently owned with precision manufacturing, often combining impact and tempered options
✅ Simonton (by Cornerstone) – Budget-friendly with strong energy performance
✅ PlastPro & Therma-Tru Doors – For door systems with high durability and complementary aesthetics

Many of these brands offer certified combinations of laminated and tempered glass — which we’ll always explain clearly during your consultation. No gimmicks.

💰 Cost Comparison: Impact vs. Non-Impact Windows (Now in Paragraph Form with Emojis)

Let’s talk numbers, shall we? 🧮 On average, a non-impact window will cost you anywhere from $500–$750 installed. They’re affordable, stylish, and for homes located farther inland (like Inverness, Ocala, or Homosassa), they’re often a perfectly reasonable choice — as long as you plan on using storm shutters. However, those shutters are an additional cost, require regular maintenance, and let’s face it — are no fun to put up in the middle of a hurricane watch. 🌪️

Now, shift gears to impact windows, and you’re looking at a higher price point — usually $950 to $1,500+ per window installed. 😳 But don’t let the sticker shock scare you away. These windows are essentially built-in insurance policies. 💼 You’ll likely qualify for homeowners insurance discounts, cut down on future repairs, and enjoy year-round peace of mind. And don’t forget: shutters aren't required when you install impact-rated glass. So that’s one less hassle — and one less thing to store in your garage. 🛠️

When you factor in all the long-term benefits — energy savings, fewer replacements, stronger security, and no need for additional storm protection — impact windows can actually be the better financial investment over time. 📈

😱 Common Myths We Hear from Customers

Let’s bust a few while we’re at it:

❌ “You have to wait months after a termite treatment before installing impact windows.”
👉 Nope! We’ve already addressed this in another post. Window installation doesn’t affect treated walls.

❌ “If I get non-impact windows, I can just tape them up in a storm.”
👉 Please don’t. That’s like duct taping a broken umbrella and walking into a hurricane.

❌ “Impact glass is always dark or tinted.”
👉 Not true. Many impact glass options come in clear, low-E, or even reflective finishes.

🏠 Retrofit vs. New Construction Installations

Your installation method matters.

If you’re retrofitting into an older stucco home, we’ll likely:

Cut back exterior stucco carefully
Use flashing tape, waterproof caulk, and trim extenders
Possibly repaint and retexture around the window

New construction or full-frame replacements involve:

Rebuilding the bucking
Possibly installing nail fins
Fully integrating into the wall system

We handle both, and always walk you through the best option for your build.

🔍 What About Warranties?

Impact-rated products generally come with stronger warranties, especially:

Structural warranties (10–20+ years)
Glass breakage warranties
Transferable warranties

Be sure to ask about:

🚫 Limitations (especially if installer is not manufacturer-certified)
🧰 Who handles the labor?
🧾 Transfer fees or exclusions

We always explain all this at Windoor Retro Professionals — no fine print games.

🏡 The Best Fit for Your Florida Home

Here’s a breakdown of what you might consider:

Best for Coastal Homes (e.g., Tampa, Saint Petersburg):

🌀 Impact windows with laminated + tempered glass
High design pressure (DP) ratings
Impact-rated exterior doors

Best for Inland Areas (e.g., Ocala, Gainesville):

Non-impact windows + accordion shutters (budget-friendly)
Impact windows if you’re in a high-wind corridor

Best for Budget-Conscious Projects (e.g., Inverness, Homosassa):

Mix of impact for vulnerable openings (like sliding doors), non-impact for smaller openings

Best for Long-Term Value (anywhere):

Fully impact-rated system with transferable warranties
Installed by licensed, experienced pros

🎯 The Windoor Retro Professionals Promise

We don’t upsell, overstate, or push you into a product you don’t need.

Whether you’re looking to stormproof a bungalow in Citrus Springs, outfit a high-rise condo in Orlando, or protect a family home in Hernando, we bring clarity, craftsmanship, and complete honesty to every estimate and install.

We’ll walk you through: