Stop Drafts and Lower Your Heating Bills

Window and Door Replacement in Buffalo for homes with air leaks, condensation, or worn weatherstripping

MD Construction delivers window and door replacement services throughout Buffalo and surrounding areas, installing modern, weather-sealed products that reduce drafts and improve energy performance. You receive removal of old units, preparation of rough openings, and installation with proper flashing and sealing to prevent moisture intrusion. This service is for homeowners who notice cold air near windows, condensation between panes, or difficulty opening and closing doors.


The work involves removing existing windows and doors without damaging surrounding siding or trim, inspecting the framing for rot or misalignment, and installing new units that fit squarely within the opening. Flashing is applied around the perimeter to direct water away from the interior, and gaps are filled with low-expansion foam or backer rod before caulking. Products are selected based on thermal performance, architectural style, and budget, and installation follows manufacturer guidelines to maintain warranty coverage.



Reach out to discuss which windows or doors need replacement and what options match your home.

Flashing, Sealing, and Proper Fit in Every Opening

Your project begins with measurements and an assessment of the rough openings to ensure the new units will fit without forcing or shimming excessively. MD Construction removes old windows and doors carefully, checks the framing for level and plumb, and makes adjustments if the opening has shifted over time. New units are set into place, secured with fasteners, and surrounded by flashing tape or metal flashing to create a waterproof seal.


Once the replacement is complete, you no longer feel cold air near windows, condensation stops forming between panes, and doors close smoothly without sticking or gaps. Locks engage fully, and weatherstripping compresses evenly around the perimeter. The home feels quieter, warmer in winter, and more secure overall.



The timeline depends on the number of units being replaced and the condition of the rough openings. Most projects require one to three days for a full-home replacement. Custom sizes or structural repairs add time. Options include vinyl, fiberglass, and wood-clad windows, as well as insulated steel or fiberglass entry doors.

Common Questions About Replacing Windows and Doors

Homeowners want to know what materials perform best, how to avoid leaks, and when replacement makes more sense than repair.

  • What type of windows are best for Buffalo winters?

    Double or triple-pane windows with low-emissivity coatings and insulated frames reduce heat loss and prevent condensation during cold weather.

  • How do you prevent water from leaking around new windows?

    Proper flashing is applied to the exterior before the window is set, and all gaps are sealed with foam and caulk to direct water away from the opening.

  • When should you replace a door instead of adjusting it?

    If the door frame is rotted, the door no longer closes tightly, or the weatherstripping is compressed and ineffective, replacement is more reliable than adjustment.

  • Why does proper sealing matter after installation?

    Gaps around windows and doors allow air infiltration, which increases heating costs, causes drafts, and allows moisture to enter the wall cavity over time.

  • How long does a typical window replacement take?

    Most homes require one to two days for full replacement, depending on the number of units and whether framing repairs are needed.

MD Construction installs windows and doors with attention to fit, flashing, and long-term performance, so your home stays comfortable and protected. Contact the team to schedule an evaluation and review product options that meet your needs.