Hairline cracks in stucco are not always an emergency, but ignoring them in the Los Altos, CA climate is a gamble. Between the heavy morning moisture rolling off the Santa Cruz Mountains and the dry summer heat we get right here in Los Altos, CA, exterior walls take a beating. Over the years running Mighty Stucco Solutions, we have walked dozens of properties from the Country Club neighborhood down to downtown, and we see the same preventable damage over and over. Catching these issues early saves you thousands of dollars, but you have to know what you are actually looking at on your stucco.
Before You Start Walking the Walls
Grab a clipboard, a flashlight, and a garden hose, but leave the heavy tools in the garage. You do not need a moisture meter right out of the gate to do a solid visual check of your stucco exterior. Walk the perimeter of your house on a bright day when the sun hits the stucco walls at an angle. That side-lighting is a key tool because it exposes shadow lines, bulges, and subtle texture changes that disappear under a high overhead sun. Clear away any heavy shrubs or ivy touching the stucco siding. If water cannot evaporate off the stucco because a bush is hugging the wall, Mighty Stucco Solutions knows you are inviting trouble.
What You Can Check Yourself
Start scanning the stucco surface for cracks, keeping an eye out for anything wider than a credit card edge. Hairline fractures under a sixteenth of an inch are usually just normal curing or seasonal expansion, but wider stucco gaps need attention. Look closely around window frames and door corners because those spots deal with the most stress as a house settles into the clay-heavy soil common around Los Altos, CA. Check the weep screed at the very bottom of the stucco wall, too. If that metal mesh channel is buried under mulch or dirt, moisture has nowhere to go. You can easily rake back the debris yourself to clear those stucco vents.
When It is Time to Call a Pro
If you tap on the stucco with a screwdriver handle and hear a hollow, booming sound, stop what you are doing. That means the outer stucco coat has delaminated from the lath underneath, and a simple stucco patch will not cut it. Stains that look like rust streaks or dark, damp patches on the stucco that never seem to dry out even after a week of sunshine point to hidden leaks behind the barrier. At Mighty Stucco Solutions, we bring out thermal cameras and probing tools to see how far the rot has traveled beneath the stucco surface. Leave the invasive testing and structural stucco patching to someone with experience, especially if you spot spiderweb cracking or crumbling stucco corners.
For homes and businesses in Los Altos, CA, Mighty Stucco Solutions provides Stucco Repair services.