Finding a stud behind a stucco exterior can be a bit more challenging than locating studs behind drywall due to the thickness and texture of stucco. However, with the right tools and techniques, you can successfully locate structural framing. Below, I’ve outlined a step-by-step plan to help you find a stud behind stucco walls.
Step 1: Understand Stucco Walls
Before you begin, it’s essential to understand that stucco is typically applied over a metal lath or wire mesh that is attached to the studs of the wall. This can make traditional magnetic stud finders less effective. You’ll often need a more powerful tool that can detect changes in wall density.
Step 2: Choose the Right Stud Finder
For stucco walls, an electronic stud finder that can detect changes in wall density is usually more effective than a magnetic one. Look for a stud finder that has a deep scan mode, as this can penetrate thicker materials like stucco. Before using your stud finder, make sure it’s designed for use with stucco and check the maximum scanning depth to ensure it’s suitable for your wall thickness.
Step 3: Calibration and Testing
Calibrate your stud finder according to the manufacturer’s instructions. It’s often best to start in an area where you believe there are no studs so that the device can get a baseline reading of the wall’s density. Test the stud finder on an area of the wall where you know a stud exists (for example, next to an outlet or a window frame, which is generally attached to a stud), to ensure it’s working properly.
Step 4: Scan the Wall
Once calibrated, hold the stud finder flat against the wall and begin scanning horizontally. Move it slowly across the surface, and take note of any indications of increased density. Most electric stud finders will signal with a light or beep when a stud is detected. Be sure to mark the edges of where the stud is indicated, as this will give you the most accurate location for the stud’s center. For greater accuracy, you may want to scan both from left to right and from right to left, as readings can sometimes vary.
Step 5: Verify the Stud Location
After you’ve marked where you believe the studs are, verify the position by drilling a small pilot hole. If you hit solid wood, you’ve found your stud. Alternatively, once you have a general idea of where the studs should be (usually spaced 16 to 24 inches apart, center to center), you can try tapping on the wall with a hammer. The sound will be more solid where there is a stud behind the stucco.
Step 6: Mark the Entire Stud Path
When you’ve confirmed the location of one stud, measure 16 or 24 inches from that point to locate adjacent studs. Confirm each with the stud finder or pilot holes. Once located, use a level to draw faint vertical lines along the stud path for future reference.
Tips and Cautions
When drilling into stucco, be careful not to drill too deeply or with excessive force, as it could crack or damage the surface. Consider using a piece of tape on your drill bit to mark the depth you need to reach the stud without going too far. Also, be aware of potential wiring or plumbing that might be within the walls.
Remember that patience and a methodical approach will yield the best results when finding a stud behind stucco. If you’re not confident in your ability to find studs or are working on a particularly important project, it might be best to consult a professional.
Conclusion
Locating a stud behind a stucco wall is more challenging than typical stud finding but can be accomplished with the right tools and techniques. Remember to use the appropriate stud finder, calibrate it for your wall type, scan slowly, verify the findings, and be careful when marking and drilling. With this step-by-step guide, you should be able to securely mount objects to your stucco walls with confidence.