Installing siding is one of the best ways to protect and beautify your home. But when it comes to siding installation on uneven walls, things can get tricky. Uneven surfaces can create problems like gaps, buckling, or improper sealing—issues that can compromise both the look and function of your siding.
If your home’s exterior isn’t perfectly flat, don’t worry. With the right approach, tools, and materials, you can still get a clean, professional finish. In this article, we’ll cover some helpful tips to make siding over uneven surfaces easier and more successful.
Why Uneven Walls Are a Challenge for Siding
Before we jump into solutions, it’s important to understand the problem. Uneven walls might be the result of aging materials, poor framing, foundation shifts, or past repairs. When these surfaces are covered without correction or adjustment, the siding won’t lie flat.
This can lead to:
- Gaps where moisture can seep in
- Visual distortions and waves in the siding
- Poor energy efficiency
- Faster wear and tear
That’s why proper prep and planning are key when tackling siding installation on uneven walls.
1. Start with a Detailed Wall Inspection
Before you begin any work, thoroughly inspect the exterior walls. Use a long level or straight edge to check for dips, bows, or high spots. Mark problem areas so you can address them during prep.
Look out for:
- Rot or damage behind old siding
- Loose or protruding sheathing
- Framing issues that might need correction
Knowing what you’re working with is the first step to a successful siding over uneven surfaces job.
2. Level the Surface When Possible
In some cases, you can correct uneven walls by adding furring strips—thin strips of wood or composite—that help create a flat base. These are installed vertically across the wall, giving the siding a level plane to attach to.
Using furring strips can:
- Bridge gaps in the sheathing
- Provide a strong, uniform backing
- Make installation easier and more precise
This method is especially helpful when installing fiber cement or other rigid materials that require a flat surface.
3. Use Flexible Siding Materials
Not all siding materials are created equal. Some are better suited for siding over uneven surfaces than others. For instance, vinyl siding has some flexibility, which can make it easier to install on slightly uneven walls. Similarly, engineered wood siding can adapt to imperfect conditions better than traditional wood planks.
However, it’s important not to rely solely on the material’s flexibility. Always combine it with proper surface prep to get the best result.
4. Take Your Time with Fastening
When it comes to siding installation on uneven walls, how you attach the panels makes a big difference. Fasten siding loosely enough to allow for slight movement but tightly enough to keep it secure. Overdriving nails can force the siding to follow the uneven contours underneath, leading to buckling or gaps.
Tips for fastening siding on uneven walls:
- Use a level with each row
- Step back frequently to check for visual alignment
- Don’t overtighten fasteners
- Leave room for expansion and contraction
5. Don’t Skip the Moisture Barrier
A moisture barrier (like house wrap) is essential on every siding job, but even more so when working on uneven walls. These surfaces often have small gaps that can let in water. The barrier adds a layer of protection between your home and the elements.
Install the wrap carefully and overlap all seams. Secure it tightly to the wall before applying any siding. For added security, flashing around windows and doors should be inspected or replaced if needed.
When to Call a Professional
If your walls are significantly uneven or you’re unsure how to correct the problem, it might be time to call in a professional. A licensed roofing contractor with siding experience will know exactly how to handle uneven surfaces and ensure a clean, long-lasting finish.
They can also help you select the best materials, prepare the surface properly, and avoid common pitfalls—saving you time and money in the long run.
Why Siding Matters
Quality siding does more than improve your home’s curb appeal. It helps regulate temperature, blocks out moisture, and adds structural strength. Poor installation, especially on uneven surfaces, can lead to costly repairs down the line.
At Bucci Roofing, we understand the importance of getting siding done right. Whether you’re replacing old siding or working with a brand-new exterior, we’re here to help. Our experienced team specializes in siding services and knows how to handle even the most challenging installs.
Final Thoughts on Siding Installation on Uneven Walls
Tackling siding installation on uneven walls requires a careful blend of prep, the right tools, and smart technique. Whether you’re DIY-ing or hiring a pro, the key is to take your time and not cut corners. With the right approach, your home will look great and stay protected for years to come.
From using furring strips to choosing flexible materials, there are plenty of ways to make siding over uneven surfaces look seamless and professional.
Ready to Get Started? Call Us Today!
Need help with siding installation on uneven walls or unsure where to begin? Bucci Roofing is here to help. We bring years of experience and a commitment to quality in every job we do.
