Alright, let's talk stucco. As a contractor here in El Monte, I get a lot of the same questions from folks about their homes. It's a popular choice around here, and for good reason – it holds up well to our hot summers and keeps a classic look. But it's not magic, and there are things you should know. So, I figured I'd tackle some of the most common questions I hear, straight up, no fluff.
How long does stucco really last?
That's probably the number one question, and it's a good one. A well-installed, traditional stucco system, the kind with three coats over wire lath, can easily last 50 to 80 years, sometimes even longer. I've seen homes in older parts of El Monte, like near Valley Boulevard, where the stucco is still going strong after 60 years with just some minor upkeep. The key is 'well-installed' and 'minor upkeep.' If it's done right, with proper flashing, weep screeds, and good drainage, it's incredibly durable. EIFS (Exterior Insulation and Finish Systems), which is a different beast, has a shorter lifespan. Usually, you'll see it last 20-30 years before you might start seeing more significant issues or needing a full re-coat.
Is stucco waterproof?
This is a common misunderstanding. Stucco isn't waterproof in the way a rubber boot is. It's water-resistant. Think of it like a good rain jacket – it sheds most of the water, but if you stand out in a downpour long enough, or if there's a tear, some moisture can get through. Traditional stucco is designed to breathe; it can absorb a little moisture and then release it. The real protection comes from the layers underneath it: the building paper or house wrap, and proper flashing around windows, doors, and rooflines. If water gets behind the stucco and can't drain out, that's when you get problems like rot in the sheathing or framing. That's why proper installation of those underlying layers is so critical.
What causes those hairline cracks I see? Are they serious?
Hairline cracks are super common with stucco, and usually, they're not a big deal. They're often just surface-level, caused by the stucco drying and curing, or by minor expansion and contraction due to temperature changes – something we definitely get here in the San Gabriel Valley. Think of them like fine lines on an old map. If you can only see them up close and they don't seem to be growing, they're likely just cosmetic. What you need to watch out for are cracks that are wider than a credit card, spiderweb patterns, or cracks that run horizontally or diagonally from corners of windows or doors. Those can indicate structural movement or water intrusion, and those are the ones you'll want me or another pro to take a look at.
How do I clean my stucco without damaging it?
Cleaning stucco is pretty straightforward, but you gotta be careful. For general dirt and grime, a soft brush, some mild detergent (like dish soap), and a garden hose with a spray nozzle usually do the trick. Just scrub gently and rinse. For tougher stains like mildew or algae, which can pop up on the north-facing sides of houses or in shadier spots, a mix of water and a little bleach (about 1 part bleach to 3-4 parts water) can work. Apply it, let it sit for 15-20 minutes, then scrub and rinse thoroughly. Never, ever use a high-pressure washer too close or on a strong setting. You can blast off the finish coat, or worse, force water into the wall system. I've seen it happen, and it's not pretty. Keep it gentle.
Can I change the color of my stucco? Do I have to repaint?
Absolutely, you can change the color! You've got a couple of main options. The most common is painting. You'll want to use a high-quality acrylic or elastomeric paint specifically designed for stucco. These paints are flexible and breathable, which is important for stucco. Your other option, if you're looking for a more durable, longer-lasting color change, is a fog coat or a color coat. A fog coat is a very thin, pigmented cementitious wash that tints the existing stucco without building up a thick layer. A color coat is a new, thin layer of stucco with integrated color. El Monte Stucco & Plastering does a lot of these, and they can really refresh a home's look without the regular maintenance of paint. It really depends on the condition of your existing stucco and what kind of finish you're after.
What's the deal with stucco and termites?
This is a big one, especially in our climate. Stucco itself isn't a food source for termites, but it can create conditions that make it easier for them to get into your home undetected. The main issue is when stucco goes all the way down to the ground. This creates a 'bridge' for termites, allowing them to build tunnels behind the stucco and directly into your wood framing without you ever seeing their mud tubes on the exterior. It's why building codes require a gap between the bottom of the stucco and the soil, usually 6-8 inches, called a 'termite barrier' or 'clearance.' If your stucco goes to grade, it's a good idea to have it inspected regularly by a pest control company, and consider having a contractor like us create that necessary clearance.
How can I tell if my stucco is traditional or EIFS?
Good question, because they're maintained differently. Traditional stucco, also called hard coat or three-coat stucco, is hard and brittle. If you tap it, it sounds solid. EIFS, on the other hand, usually has a foam insulation board underneath its finish coat. If you tap EIFS, it'll sound hollow or feel softer, almost like plastic. You might also notice EIFS looks a bit 'puffier' around windows or corners because of that foam. If you're still not sure, sometimes a small, discreet poke in an inconspicuous area (like near the foundation or behind a bush) can reveal if there's foam underneath. Just be careful not to damage anything. If you're really stumped, I can usually tell with a quick look.
Hopefully, that clears up some of the mysteries around stucco for you. It's a great material for homes here in El Monte, but like anything else, understanding it helps you take better care of it. If you've got more questions, or if something I mentioned here sounds like a problem you're seeing on your house, don't hesitate to reach out to El Monte Stucco & Plastering. We're always happy to help.