Window Installation & Waterproofing
Windows are where stucco walls leak. We make them watertight.
More stucco wall failures begin at windows than anywhere else. Every window is a hole in the water barrier, and it stays watertight only if the flashing, barrier, and stucco are integrated correctly — head flashing lapped under the barrier above, sill protection directing water out, and stucco returns sealed without trapping moisture.
Fogg Construction handles window installation and waterproofing as a single scope: setting or re-setting the window, building the flashing and moisture barrier around it, and patching the stucco to match the existing wall. When window replacement crews cut out stucco and leave the patch to "someone," that someone’s work determines whether the wall leaks. We’d rather it be ours.
Our window patching and restoration work follows the same discipline: remove the damaged stucco around the frame, inspect and reinforce the water barrier, and re-apply stucco that blends seamlessly with the facade.
What this capability covers.
New window installation
Windows set, flashed, and integrated into the wall’s moisture barrier in correct shingle-lap sequence.
Replacement window waterproofing
Flashing and barrier rebuilt around retrofit and new-construction-flange replacements — the step most window jobs skip.
Stucco cut-out & patch-back
Clean stucco removal for window work and seamless patch-back matched to the existing texture and color.
Leak repair at existing windows
Diagnosis and correction of windows that already leak: barrier repair, new flashing, and restored stucco returns.
From the wall, not the brochure.
Asked before. Answered straight.
Why do stucco walls so often leak at windows?
Because a window interrupts the wall’s water barrier, and the penalty for incorrect flashing is invisible — water enters behind the stucco and damages framing long before anything shows. Correct shingle-style integration of flashing, barrier, and stucco is what keeps the assembly dry.
My window installer says the stucco patch isn’t their job. Can you handle it?
Yes — that hand-off is exactly where leaks are born. We patch stucco around new windows with the barrier and flashing rebuilt correctly, and we match the existing texture so the patch disappears.
Do you find damage when you open up around windows?
Sometimes — that’s the point of inspecting while the wall is open. If the barrier or framing shows water damage, we document it and correct it before closing up, so you’re not sealing a problem inside the wall.
Can you waterproof windows without replacing them?
Often, yes. If the window unit itself is sound, we can remove the stucco at the perimeter, rebuild the flashing and barrier, and restore the stucco — solving the leak while keeping the existing window.
Will the patch around my new window be visible?
Texture matching is one of our specialties. The patch is finished to match the surrounding wall’s texture, and where color uniformity calls for it, we’ll recommend a fog coat to blend the elevation.
Adjacent scopes, same standard.
Request an assessment for window waterproofing.
Tell us what the building is doing and where. We’ll diagnose the cause, then scope the correction honestly — proportionate to the actual problem, not the worst case.
Prefer to talk? 415-827-0782 · Mon–Fri 7AM–5PM