ENERGY STAR rated Pella with Low-E argon-filled glass. Triple-pane available for premium thermal performance. Real-world bill reduction documented.
Every energy-efficient windows project KPro takes on starts with a free 24-hour drone inspection. We document everything before we touch a single shingle, fastener, or membrane — and you get those photos and the written assessment whether you proceed or not.
Our St. Louis customers have been telling us the same thing for 6 years strong: the difference is in the details. Three magnet sweeps for nails. Final drone inspection before sign-off. Two rounds of rain test for any roofing work. Owner on-site for every insurance adjuster meeting.
From Manchester to Chesterfield, Wildwood to Ballwin, Kirkwood to Town & Country — KPro has installed, repaired, and maintained energy-efficient windows across every St. Louis suburb. Family-owned since 2020. 4.9 stars on 160+ verified reviews.
Not all replacement windows save money. The performance is in the spec sheet.
Glass coating (Low-E). Microscopic metallic coating that reflects heat. Major performance driver.
Gas fill (argon or krypton). Inert gas between panes is denser than air, slows heat transfer.
Number of panes. Double-pane is standard. Triple-pane reserved for premium installs in cold-weather priority homes.
Frame material. Vinyl and fiberglass insulate better than aluminum. Pella offers all three.
U-Factor and SHGC. The two ENERGY STAR ratings that matter. Look for U-Factor under 0.30 and SHGC matched to your exposure.
On-site within 24 hours. Drone aerial photos, ground walkthrough, written assessment. Free even if you don't proceed.
Itemized: materials, labor, warranty terms. No surprises, no hidden fees.
Materials delivered the morning of. Crew on-site at 7am. Most residential jobs finish in one day.
Three magnet sweeps for nails, final inspection together, you sign off. Manufacturer + KPro labor warranty on file.
KPro provides energy-efficient windows services throughout the St. Louis metropolitan area and surrounding Missouri suburbs, plus Quincy, IL.
Common questions about energy-efficient windows in the St. Louis area. Don't see yours? Call (636) 386-7499.
Replacing single-pane or 30-year-old double-pane: 10–25% on heating/cooling typical. Highly variable based on home insulation, window count, and your usage patterns.
For most St. Louis homes: probably not. The marginal energy savings rarely justify the 30–40% cost premium over double-pane Low-E. Worth it in cold-snap-prone microclimates.
Yes — ENERGY STAR rated windows qualify for federal Energy Efficient Home Improvement Credit (up to $600 for windows). We provide the documentation.
Pella runs seasonal rebate promotions. We check current incentives at quote time.
KPro provides energy-efficient windows across the entire St. Louis metropolitan area including Manchester, Chesterfield, Wildwood, Ballwin, Kirkwood, Town & Country, Ellisville, Creve Coeur, Webster Groves, Wentzville, O'Fallon, St. Peters, Festus, and more — plus Quincy, IL on the Illinois side. Call (636) 386-7499 to confirm we serve your specific zip code.
Same-week scheduling for all standard estimates. Same-day response for active leaks or storm damage. We provide a written, itemized estimate within 24 hours of the on-site inspection.
No obligation. Real St. Louis roofers since 2020. Bilingual crew. Owner on every claim.
