I highly recommend Keller! The windows which I had replaced in my home are wonderful and I was very pleased with working with Keller. John Keller was very professional and honest in his recommendations for my windows as well as giving me a fair price for quality windows and workmanship. This is the only company to go with for window and door installation!
Door Installation Service
Entry Door Installation in O'Fallon, MO
Keller Window & Door LLC installs entry doors for O'Fallon homeowners who want better security, efficiency, and curb appeal.
- A properly sealed entry door reduces air leakage, helping lower heating and cooling costs year-round.
- A new door with a solid core and updated hardware improves home security at the main point of entry.
- Fresh entry door installation updates your home's exterior appearance and adds to resale value.
- Correct frame fitting and weatherstripping prevents moisture from working into the door opening over time.
- A well-installed entry door operates smoothly through Missouri's seasonal temperature changes without warping or sticking.
Expert Entry Door Installation in O'Fallon, MO
Entry door installation in O'Fallon means more than swapping out an old door. It means putting in a unit that holds up against Missouri's wide temperature swings, from summer highs near 89°F down to January lows around 20°F. At Keller Window & Door LLC, we handle the full process: removing the existing door, checking the frame for damage, fitting the new unit, and sealing it against air and moisture. A poorly sealed entry door lets conditioned air escape and lets humidity work into the frame over time. O'Fallon's mix of established subdivisions and newer builds means door openings vary in size and condition. We measure carefully and address any frame issues before the new door goes in. Whether you are replacing a worn front door or upgrading to a unit with sidelights, we make sure the fit is tight and the finish is clean. Call Keller Window & Door LLC to schedule your entry door installation in O'Fallon.
What's included
- A properly sealed entry door reduces air leakage, helping lower heating and cooling costs year-round.
- A new door with a solid core and updated hardware improves home security at the main point of entry.
- Fresh entry door installation updates your home's exterior appearance and adds to resale value.
- Correct frame fitting and weatherstripping prevents moisture from working into the door opening over time.
- A well-installed entry door operates smoothly through Missouri's seasonal temperature changes without warping or sticking.
Andersen Certified Contractor and Elite Certified distinction
Former Andersen employee owner with 30 years field experience
Factory-level installation precision and quality standards
Transparent pricing and clean workmanship
Appointment-only service for focused attention
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FAQ
Entry Door Installation FAQ
Common questions about entry door installation in O'Fallon, MO.
Yes, we install entry doors in existing O'Fallon homes, including replacements for worn or damaged units. We handle both standard openings and situations where the frame needs attention before the new door goes in.
We remove the old door and inspect the frame before installing the new unit. If we find rot or damage in the O'Fallon home's frame, we address it so the new door fits correctly and seals tight.
Yes, we install entry door units with sidelights for O'Fallon homeowners. We measure the opening carefully to confirm the new configuration fits the existing rough opening or discuss what adjustments are needed.
O'Fallon experiences large temperature swings between summer and winter, so a tight weatherstripping seal keeps conditioned air inside and moisture out. A door installed without proper sealing will lose efficiency quickly in this climate.
If your door sticks, drafts come through the frame, or the door shows visible warping or rot, full replacement is usually the right call. Our team can assess the condition of your current door and frame at your O'Fallon home before recommending next steps.
Yes, we serve homeowners throughout O'Fallon, Missouri. Contact us to confirm service to your specific address and to get your entry door installation scheduled.
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Phone
(314) 399-2001Hours
- Monday 8:30 AM - 4:30 PM
- Tuesday 8:30 AM - 4:30 PM
- Wednesday 8:30 AM - 4:30 PM
- Thursday 8:30 AM - 4:30 PM
- Friday 8:30 AM - 4:30 PM
- Saturday Closed
- Sunday Closed