Stucco Repair in Pasadena, the San Gabriel Valley and the Inland Empire

What causes stucco to crack?

Most stucco cracks come from normal movement: the house settling, concrete or framing shrinking, temperature swings, and vibration. Poor original mixing or curing, and moisture getting behind the stucco, also contribute. Hairline cracks are usually cosmetic, while wide, stair-step or recurring cracks need a closer look to rule out a deeper problem.

Not every crack means trouble, but every crack lets water in if left open. That is why even cosmetic cracks are worth sealing before the next rainy season.

• Hairline cracks: common, often from curing and temperature changes, and sealed with flexible patching material
• Cracks at the corners of windows and doors: stress concentrates there and they often return if the opening is not properly reinforced
• Wide or stair-step cracks: can signal settling or foundation movement, so Cesar will tell you what he sees and when to bring in a specialist
• Bubbling, soft or stained areas: usually moisture behind the stucco, which has to be traced to its source
• Chipped or missing sections: impact, trim failure or water damage

Can stucco be patched, or does a section need to be redone?

Small cracks and chips can be patched. When stucco is loose, hollow-sounding, stained by moisture or missing in larger areas, the damaged section should be cut back to sound material and re-stuccoed. Patching over unsound stucco will fail again, so Cesar checks by tapping and probing the wall.

If the wall has been opened down to lath, as in the photo above, new stucco goes on in coats: a scratch coat, a brown coat, then the finish coat, with curing time between layers.

Can you match my existing stucco texture and color?

We can match common finishes such as smooth, sand, lace and dash textures, and blend new stucco into the old, though an exact match is not always possible. Older stucco has weathered, so the most reliable way to hide a repair is to repaint the whole wall section after the patch cures.

Texture is created by how the finish coat is applied: troweled, sprayed, dashed or floated. We test a sample on the wall, compare it in daylight and adjust before committing to the repair.

Color is harder. Stucco fades and collects dirt, and fresh material is nearly always lighter or different in tone than the surrounding wall. If the existing wall is painted, repainting the repaired section edge to edge, or the whole wall if needed, gives the best result. Painting is one of our services, so the two jobs can be planned together.

How long does stucco repair take?

A small crack or patch repair can be done in a day, while re-stuccoing a larger section takes several days because each coat has to set and cure before the next. Weather matters, since stucco needs the right temperature and moisture to cure well. Cesar gives you a realistic schedule at the free estimate.

Stucco is a material that rewards patience. Fresh stucco cures slowly, often lightly misted so it does not dry too fast, and paint should only go on once the surface has cured as the product directions say.

Rain, wind and very hot or cold weather all affect the schedule. We plan around forecasts, and if conditions are wrong for the work, we reschedule rather than risk a patch that cracks.

What causes water damage behind stucco, and can it be fixed?

Water usually gets in through cracks, failed caulk at windows and doors, poor flashing, roof or gutter leaks, and sprinklers hitting the wall. Behind the stucco it can rot framing and damage insulation. Fixing it means finding the source, drying and repairing the backing, then re-stuccoing the area.

Signs of trouble include dark staining, bulging or soft stucco, efflorescence, which is a white chalky deposit, and cracks that keep reopening in the same place.

Cesar will tell you what he sees and whether the repair is within our scope. Widespread moisture damage, mold or structural rot is scoped separately, and some situations call for a roofer, plumber or other specialist first.

What should I do before the stucco repair visit?

Photograph the cracks and stains, note when you first saw them and whether they change after rain, and clear plants, furniture and decorations away from the wall. Turn sprinklers off near the area. If you know the paint color, brand or texture style, share it, since it speeds up matching.

• Take close-up and wide photos of each problem area
• Trim plants and move items at least a few feet from the wall
• Check whether sprinklers spray the wall and aim them away
• Locate leftover paint or the color name and brand
• Tell us about past repairs or leaks in the same area