Rio Rancho Stucco Repair Water getting in around a window: where stucco leaks at windows and how it is fixed
Water that runs in between the stucco and the house at a window, especially after a stretch of heavy rain, almost always comes from one of four places. Finding which one is most of the job, because a repair aimed at the wrong one leaks again at the next storm.
The four usual sources
| What you see | Usual source |
|---|---|
| A crack running diagonally off a window corner | The corner crack is carrying water straight into the wall |
| A gap or dried-out bead where the stucco meets the window frame | Failed sealant joint at the perimeter |
| Staining or water below the window, worse after wind-driven rain | Missing or failed head flashing above the window, or a sill detail that sends water in instead of out |
| Water inside at the frame itself, with the stucco sound | The window, not the stucco: frame joints, glass seals, or a blocked sill drain |
Why cracks start at window corners
A window opening is a weak point in a stucco wall. The wall moves with temperature and settling, and that movement concentrates at the corners of the opening, so the classic window crack runs diagonally off a corner at roughly 45 degrees. It is common and not in itself a sign of a structural problem, but it is a direct path for water to the paper and lath behind the stucco.
What stucco cracks mean covers how to read crack width and pattern.
How to check it yourself
Note exactly where the water appears inside: which corner, top or bottom of the frame, and whether it only shows when the rain comes from one direction.
Look at the outside corners of the window for a diagonal crack, and run a finger along the joint where the stucco meets the frame. Sealant that is cracked, pulled away, or missing is a likely culprit.
Tap the stucco below and beside the window with a knuckle. A hollow, drummy sound means the stucco has separated from the lath, which means water has been getting in for a while. See hollow or blistered stucco.
Photograph all of it, including a wider shot showing what is above the window. A roofline, canale or scupper above a window can send water down onto it.
What the repair involves
Crack or sealant repair. If the stucco around the window is still bonded, the crack is opened and filled properly and the perimeter joint is cleaned out and resealed with a sealant meant for the movement. This is crack repair, typically $200 to $800.
Cut out and rebuild. If the stucco has gone hollow, or the paper and lath behind it are wet or rusted, the damaged area is cut back to sound material, the paper and lath are replaced where needed, and the stucco is rebuilt in coats. This is patching, typically $500 to $2,000, and it is the point at which flashing above the window can be checked and corrected.
Match the finish so the repair does not show as a patch. See colour and texture matching.
Every figure here is from the pricing page, and the cost calculator prices a specific job.
Why it matters to do it before winter
Water that gets behind stucco at a window does not stay there quietly. In a climate with freezing nights, a wet wall freezes and pushes the stucco off the lath, so a leak that is a crack in September can be a section of hollow stucco by spring. A small repair now is usually the cheaper one.
If you had the window replaced recently
A replacement window set into existing stucco depends entirely on how the joint between the new frame and the old stucco was sealed and flashed. If the leak started after a window was replaced, tell us, and tell the installer too, because the fix may be theirs.
What to expect on the call
Photos of the window from inside and out, where the water shows up, and roughly how long it has been happening. We cover Rio Rancho, Corrales, Bernalillo, Placitas, Albuquerque, and Los Ranchos.
Frequently Asked Questions
Why does water get in around my window only when it rains hard?
Light rain wets the wall and dries off. A hard, wind-driven rain puts enough water on the wall for long enough to find the gap: a crack running off the window corner, a failed sealant joint where the stucco meets the frame, or flashing above the window that is missing or no longer sheds water. The leak was there before; the storm just gave it enough water to show.
Can I just caulk the crack by my window?
As a stopgap until someone can look at it, yes, and it is better than letting water run in all season. It is not the repair. A crack at a window corner usually reopens because the corner keeps moving, and caulk over a joint that has been taking water does nothing about the wet paper and lath behind it.
What does it cost to fix a stucco leak at a window?
A crack or sealant repair at one window typically falls in the $200 to $800 crack-repair range. If the stucco around the window has gone hollow and has to be cut out and rebuilt, it becomes patching work at $500 to $2,000. Those are the ranges published on our pricing page; which one applies depends on what is behind the stucco once it is opened.
Is the leak coming from the window or the stucco?
It can be either, and the fix is different. A leak through the window itself (glass seals, frame joints, a clogged sill drain) is a window job. A leak at the joint between the window and the stucco, or through a crack in the stucco near it, is a stucco job. The quickest way to tell is to note exactly where the water shows up inside and whether it tracks with wind direction.