Windows That Stop Drafts and Leaks

Energy-efficient window replacement for homes in the Pacific Northwest

When windows let in cold air around the edges, fog up between the panes, or stick when you try to open them, they are no longer doing their job. In the greater Portland area, where heating costs add up during the fall and winter, drafty windows force your furnace to run longer and waste energy that could be saved with a proper seal. Peak Exteriors handles energy-efficient window replacement using professional removal and installation that includes weather-sealed framing and proper flashing to prevent moisture intrusion.


The process starts with measuring each window opening to order the correct size, then removing the old window and inspecting the framing for rot or water damage. The crew installs the new window with shims to keep it level and square, seals the gaps with low-expansion foam, and applies flashing tape around the exterior to keep water from running behind the siding. All work is performed by fully licensed and insured exterior specialists with over thirty years of experience.


Contact Peak Exteriors to schedule a window consultation in the greater Portland area and see what replacement will do for your home.

What you notice after windows are replaced

When Peak Exteriors replaces windows at your home in Lake Oswego, West Linn, Hillsboro, Oregon City, or Newberg, the crew removes interior trim carefully to avoid damaging drywall, pulls the old window unit from the opening, and checks the sill and framing for soft spots or mold before installing the new window. Each unit is leveled with shims, screwed into place through the mounting flanges, and sealed with foam that expands just enough to fill gaps without bowing the frame. Exterior flashing is applied in layers to direct water away from the opening.


After the new windows are in, you will notice cold drafts are gone, condensation no longer forms between the panes, and the windows open and close smoothly without sticking. Proper flashing and sealing prevent moisture intrusion that can rot the framing over time.


Peak Exteriors installs windows that improve natural light and curb appeal for aging homes, and the crew replaces interior trim to match the existing style once the window is sealed and tested. The work does not include painting or drywall repair beyond trim replacement, but any structural issues found during removal are addressed before the new window is installed. Energy-efficient window replacement improves insulation and reduces drafts that drive up heating costs.

What homeowners want to know before replacing windows

Homeowners often ask how long window replacement takes, whether old windows can be repaired instead of replaced, and what flashing does to protect the framing.

How long does window replacement take?
Most single-window replacements take two to three hours from start to finish, including removal, installation, sealing, and trim work. Whole-house window projects in Tualatin are usually completed in one to three days depending on the number of windows and any framing repairs needed.
Why does flashing matter for new windows?
Flashing directs water away from the window opening and prevents it from running behind the siding or into the wall cavity. Without proper flashing, moisture can rot the sill, studs, and sheathing even if the window itself is installed correctly.
What does energy-efficient mean for windows?
Energy-efficient windows have multiple panes of glass with inert gas between them, low-emissivity coatings that reflect heat, and frames designed to reduce heat transfer. These features keep your home warmer in winter and cooler in summer without relying as much on heating and cooling systems.
What happens to the trim after the window is installed?
Peak Exteriors replaces interior trim to match the style and dimensions of your existing trim once the window is sealed and tested. The crew cuts and fits the trim carefully to avoid gaps or visible seams.
When should I replace windows instead of repairing them?
If your windows are single-pane, if the glass is fogged from a broken seal, or if the frames are rotting or no longer hold a seal, replacement is usually the better option. Peak Exteriors inspects each window and explains what can and cannot be repaired.

Peak Exteriors has been installing windows for homes across Tualatin and surrounding areas for over thirty years, and all work is performed by fully licensed and insured crews. Reach out to Peak Exteriors to schedule a free estimate and get a clear breakdown of what your window replacement will involve.