Florida Certified General Contractor #CGC1539897 • 4.9 ★★★★★ (112 Reviews)
Energy-Efficient Window Installation for Lower Cooling Costs
Energy-efficient window installation looks at U-factor, solar heat gain coefficient, frame material, and spacer design together, since the coating on the glass is only one piece of what actually lowers a cooling bill.
U-Factor, SHGC & Whole-Window Performance
A window's energy performance comes from three numbers working together: U-factor, which measures how much heat passes through the whole assembly, solar heat gain coefficient (SHGC), which measures how much solar radiation gets through the glass, and air infiltration rate, which measures how much conditioned air leaks around the frame. Low-E coating affects SHGC, but frame material, spacer type, and gas fill between panes all affect U-factor independently of what coating is on the glass.
Aluminum frames without a thermal break conduct heat straight through the metal regardless of how good the glass package is, which is why frame material matters as much as coating choice for a South Florida cooling bill. Warm-edge spacers made of foam or composite material instead of bare aluminum cut conductive heat loss at the edge of the glass, and argon gas fill between panes adds another layer of insulation that a single-pane or standard double-pane assembly doesn't have.
Why Choose Six Senses Builders?
Our 4-Step Engineering & Installation Process
Sun Exposure & Elevation Assessment
The crew walks each elevation of the home to note which openings get direct afternoon sun, since SHGC targets differ for west-facing glass versus shaded north walls.
Glass Package & Frame Material Selection
U-factor and SHGC targets get matched to a specific glass package, spacer type, and frame material combination rather than picking coating alone off a sample board.
Installation & Air Seal Verification
Frames are set, anchored, and sealed with attention to the perimeter air seal, since infiltration around the frame undercuts the performance numbers on the glass itself.
Performance Label Review & Cooling Estimate
The crew reviews the NFRC label on the finished window with the homeowner and walks through what the U-factor and SHGC numbers mean for the specific home.
Energy-Efficient Window Installation for Lower Cooling Costs FAQs
❓ Is Low-E glass enough to make a window energy-efficient?
Low-E coating helps, but it's only one factor. Frame material, spacer type, gas fill, and how tight the installation seals against air infiltration all affect the whole-window U-factor and SHGC rating. A window with great glass in a poorly sealed aluminum frame can still perform worse than expected on a cooling bill.
❓ What SHGC rating should I look for in South Florida?
Most South Florida homes benefit from a low SHGC, generally around 0.25 or lower, especially on west- and south-facing elevations that take direct afternoon sun. A lower SHGC blocks more solar heat before it enters the room, which reduces how hard the air conditioner has to work through the hottest part of the day.
❓ Will energy-efficient windows actually lower my electric bill?
Windows are one piece of the cooling load, alongside attic insulation, duct sealing, and AC system efficiency, so results vary by house. Homeowners with older single-pane or clear-glass aluminum windows tend to see the largest drop in cooling costs after switching to a low-SHGC, properly sealed replacement window.
Six Senses Builders South Florida Service Radius
Corporate Headquarters
601 N Federal Hwy Suite 301, Hallandale Beach, FL 33009
Direct Phone Line
+1 (754) 243-4374 (24/7 Rapid Response)
State Licensure
Florida Certified General Contractor #CGC1539897