LOW-E IMPACT GLASS · ES WINDOWS

Energy Efficient Windows for South Florida

ES impact windows with Low-E glass options that keep the sun's heat outside, block UV and quiet the street, so your home stays cooler and your AC works less.

  • Low-E Impact Glass Options
  • Local, Licensed & Insured
  • 15+ Years Of Experience
Sale Ends Soon! 11-01-2026

Limited time offer, 0% interest

Home » Impact Windows » Energy Efficient Windows
Bright living room with three large black-framed windows looking out to palm trees and a hedge
WHAT MAKES A WINDOW ENERGY EFFICIENT

Energy efficient windows start with the glass

In South Florida, energy efficient windows have one main job: keeping the sun's heat outside. Here, most of the heat a window lets in arrives as direct sunlight, so the glass you choose matters more than anything else.

Every window we install is an ES Windows impact window with laminated glass, which already blocks most UV and dampens street noise. Add Low-E glass and a microscopically thin coating reflects much of the sun's infrared heat while still letting daylight in.

GlassLaminated impact glass
Energy upgradeLow-E coating options
Also helps withUV fading and street noise
WindowsES Windows, 5 frame colors
WHY IT WORKS IN SOUTH FLORIDA

What Low-E impact glass does for your home

Less heat through the glassLow-E glass reflects much of the sun's infrared heat, so sunny rooms take on less heat in the afternoon.
Less work for the ACWith less heat coming in and a well-sealed installation, your air conditioner runs less to hold the same temperature.
Less UV fadingLaminated glass blocks most of the UV that fades floors, rugs and furniture, and a Low-E coating cuts it further.
A quieter houseThe laminated layer dampens traffic, lawn equipment and storm noise far better than old single-pane glass.
White stucco Florida home split down the middle: old shuttered window and door on the left, black-framed impact picture window and glass door on the right
Before and after
DESIGN IT ONLINE

See the before and after on a Florida home

Our visualizer swaps old shuttered windows for ES impact windows on a South Florida house. Try single hung, horizontal roller, casement and picture windows in all five frame colors, then bring your favorites to your free estimate. We bring real frame and glass samples.

YOUR GLASS OPTIONS

Choose how much heat control you want

Every ES impact window starts with laminated glass. From there, the glass package decides how much of the sun's heat stays outside. We help you match it to how much sun each side of your house gets.

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EVERY WINDOWLaminated impact glassTwo panes bonded to a tough interlayer that holds together when debris hits it. It blocks most UV and cuts noise, and it is the base of every impact window we install.
MORE HEAT CONTROLLow-E laminated glassThe same impact glass with a Low-E coating that reflects much of the sun's infrared heat while letting daylight through. A strong choice for rooms that get direct sun.
BEST INSULATIONInsulating laminated glassA dual-pane unit: a Low-E pane, a sealed air space, then the laminated impact layer. ES designs its Elite windows to take this glass. It insulates best, and it weighs and costs more. Ask about it at your estimate.

Energy ratings change with the window style, size and glass package. Ask for the NFRC ratings of the exact windows you are pricing.

HOW IT WORKS

From estimate to final inspection

Free in-home estimateWe measure every opening and show you styles, frame colors and glass options.
PermitsWe pull the building permit and handle the paperwork.
InstallationOur crew removes the old windows and installs your new impact windows.
Final inspectionWe schedule the city inspection and close out the permit.

What South Florida homeowners say

FFred★★★★★
I can't say enough great things about the team at Guardian Impact Windows! We love our new windows for our home in Fort Lauderdale!
TTim★★★★★
From start to finish the team was great to work with. Our new windows keep the hot air out! We recommend Guardian Windows.
JJohnny★★★★★
Everyone at Guardian was a pleasure to work with! We love the way our new windows and doors look! We are saving a lot on our energy bills as well!
READ OUR REVIEWS
Sale Ends Soon! 11-01-2026

2.9% APR OR 60 MONTHS NO INTEREST

GET FREE PRICING

Energy Efficient Windows for South Florida Homes

South Florida homes deal with heat, humidity and hurricane season all at once. Energy efficient windows from Guardian Impact Windows and Roofing handle all three: ES Windows impact frames, laminated glass that protects the opening in a storm, and Low-E glass options that keep the sun's heat outside. We measure, permit and install them across Miami-Dade, Broward and Palm Beach counties.

The payoff shows up every day, not just in hurricane season: cooler rooms near the windows, an air conditioner that cycles less, floors and furniture that fade more slowly, and a quieter house. Using less electricity for cooling also shrinks your home's carbon footprint.

What Low-E glass does

Low-E stands for low emissivity. A Low-E coating is a microscopically thin, clear metallic layer on the glass that reflects much of the sun's infrared heat back outside while letting visible daylight through. Paired with laminated impact glass, Low-E glass gives you storm protection and heat control in the same window, with no shutters to put up.

How to compare energy efficient windows

  • SHGC (Solar Heat Gain Coefficient): how much of the sun's heat gets through. Lower is better, and in our climate it is the number that matters most.
  • U-factor: how well the window insulates. Lower is better.
  • Visible transmittance: how much daylight gets through. Higher means brighter rooms.
  • Installation: a sealed, square, well-anchored install keeps cool air inside and water outside.

Window energy ratings are certified through the NFRC (National Fenestration Rating Council) and change with each window style, size and glass package. As one example from ES's published specs, the ES-EL100 single hung is listed at a U-value of 0.96 with clear laminated glass and 0.64 with insulating laminated glass that has a Low-E coating, with an SHGC of 0.23 for that Low-E unit.

ENERGY STAR windows and impact windows

Many homeowners start by searching for ENERGY STAR windows. ENERGY STAR sets its window criteria by climate zone, and in Florida the focus is on blocking solar heat. Not every impact window carries the label, so compare the NFRC ratings of the windows you are pricing with the criteria for the Southern zone. For a South Florida home, a low SHGC and impact protection in the same window is what counts.

Energy efficient window replacement, start to finish

Energy efficient window replacement makes the biggest difference where old single-pane windows face the sun. At your free in-home estimate we measure every opening and show you styles, frame colors and glass. We pull the permit, our crew removes the old windows and installs your new ES impact windows, and we schedule the city inspection to close it out. Pair your windows with impact doors and a new roof to protect the whole house.

More window options

Energy efficient window questions

What makes a window energy efficient in South Florida?

Mostly the glass. Here the job is keeping the sun's heat out, so look at the Solar Heat Gain Coefficient (SHGC), where lower means less solar heat gets through, and the U-factor, where lower means better insulation. Low-E coatings and insulating laminated glass improve both. A careful, well-sealed installation matters too.

Is Low-E glass worth it in Florida?

For most South Florida homes, yes, especially in rooms that get direct sun. A Low-E coating reflects much of the sun's infrared heat while letting daylight through, so rooms stay cooler and the AC works less. It also cuts the UV that fades floors and furniture.

How much do energy efficient windows cost?

It depends on the number and size of your openings, the window styles and the glass package. Low-E and insulating laminated glass cost more than standard laminated glass. We measure every opening and price your exact project at a free in-home estimate. Ask about 2.9% APR or 60 months no interest while the sale lasts.

Are impact windows ENERGY STAR certified?

Some are and many are not, so check the exact product and glass package. ENERGY STAR sets window criteria by climate zone, and in Florida's zone the focus is on blocking solar heat. Ask for the NFRC-rated U-factor and SHGC of the windows you are pricing and compare them with ENERGY STAR's criteria for the Southern zone.

Will energy efficient windows lower my electric bill?

They can help. Less solar heat through the glass means the AC runs less to hold the same temperature. How much you save depends on your home: how many windows face the sun, what you are replacing, your insulation and your AC. We won't promise a percentage, but the biggest gains come from replacing old clear single-pane glass in rooms that get direct sun.

Do I need a permit to replace my windows?

Yes. Replacing windows in South Florida needs a building permit and inspections, whatever glass you choose. We pull the permit, schedule the inspections and close it out for you.

Can impact windows lower my insurance too?

Impact windows plus a wind mitigation inspection can help you qualify for windstorm discounts. Ask your insurance company what they offer.

Areas we serve

We install impact windows across Miami-Dade, Broward and Palm Beach counties.