Hardie Siding Installation: What Homeowners Need to Know.
Replacing your home’s siding is one of the most impactful upgrades you can make—not just for curb appeal, but for protection, energy efficiency, and long-term value. In the Pacific Northwest, where constant rain, wind, and temperature swings are part of daily life, choosing a durable siding material is especially important. That’s why more and more homeowners are turning to James Hardie fiber cement siding—a product built to withstand the harsh conditions of the PNW.
Hardie siding (often called HardiePlank) is designed to resist rot, moisture, fire, pests, and even fading. But like any major home improvement, the product is only as good as its installation. Improper handling or shortcuts can lead to water infiltration, premature wear, or even warranty issues. Whether you’re planning to upgrade your current siding or building from scratch, it’s important to understand the full scope of what’s involved in a proper Hardie siding installation.
From preparation to finish work, here’s what every homeowner should know before starting a Hardie siding project.
ASSESSING YOUR EXISTING SIDING
Before installation begins, your current siding will need to be inspected and removed. If there’s any existing moisture damage, rot, or structural issues, those need to be addressed first. Skipping this step can trap moisture beneath your new siding—leading to problems that can void your warranty. A quality contractor will take time to repair and prep the sheathing underneath so your new siding has a strong, dry foundation.
PROPER WEATHER BARRIER INSTALLATION
Once your old siding is removed, a high-quality weather barrier or house wrap must be applied over the home’s exterior. This layer helps prevent wind-driven rain from seeping into the walls while still allowing moisture from inside the home to escape. For homes in the Pacific Northwest, this step is critical for preventing long-term water damage and maintaining energy efficiency.
CORRECT NAILING AND SPACING
Hardie siding has specific installation guidelines that must be followed to the letter. This includes using corrosion-resistant nails, keeping fasteners spaced correctly, and leaving the proper clearance around windows, doors, and foundation lines. Improper nailing can lead to cracking, shifting, and even siding failure over time. A trained team will also use flashing in key areas to protect joints from water penetration.
CAULKING AND PAINTING
After installation, joints and trim are sealed with high-quality, paintable caulk to keep moisture out. Most Hardie products come pre-primed or pre-painted with ColorPlus® technology, but if your siding is being painted on-site, it’s important to use approved paints and techniques. The finishing touches are what protect your investment—and ensure your home looks beautiful for years to come.
CHOOSING THE RIGHT TEAM
Hardie siding may be a superior product, but it still requires expert handling. Look for a contractor who is James Hardie–preferred or has significant experience with fiber cement materials. A proper install not only ensures long-term performance but also keeps your warranty intact—something you won’t get with a rushed or inexperienced job.
FREE HARDIE SIDING ESTIMATES FROM AE&I
At AE&I Roofing and Construction, we specialize in professional Hardie siding installation throughout Vancouver, Washington and Portland, Oregon. Whether you’re upgrading from old wood, T1-11, or vinyl siding, our team is trained to install HardiePlank the right way—ensuring maximum durability, beauty, and value. We offer free estimates and inspections, and we’re happy to walk you through your options without pressure or sales tactics.
Contact us today to schedule your free siding consultation and discover why so many homeowners trust AE&I to protect and beautify their homes from the outside in.
Call AE&I Construction for help from the professionals.
(360) 209 - 6818
