Hardie™ Trim-Over™ Installation Method
Cut time, cut costs, and earn more using the Hardie Trim-Over™ Installation Method, the most cost-effective way to install Hardie® siding and trim.
What is the Trim-Over™ Method?
With the Hardie Trim-Over™ Method, pros install siding before trim, which eliminates most caulking - saving time, materials, and labor while increasing efficiency and profitability.
How does it work?
Watch our installation videos to learn how to install the Trim-Over™ Method using these simple steps:
Run plank off the wall edge and fasten
Score-and-snap plank at the wall edge
Pre-build corner trim
Fasten corner trim to the wall
Designed with water and pest protection in mind
When installed correctly, the Hardie™ Trim-Over™ Method is designed to effectively manage water penetration and pest intrusion. See how the wall assembly, weather-resistive barrier, and corner flashing work together to help protect the structure.
Access tools and training to get started
Get exclusive access to essential resources to help you implement the Trim-Over™ Method, including the installation guide, training presentations, and how-to videos.
Benefits that make a difference on the jobsite
30% increase
in average installation rate has been demonstrated in installation studies compared to butt-to installation.
Lower costs
Trim covers cut edges—less caulking is needed. Save on materials, callbacks, and labor.
Increased productivity
Score-and-snap lets crews stage and install siding with less precise measuring or cutting.
See why contractors are switching to the Hardie™ Trim-Over™ Method
Contractor Testimonial: How the Trim-Over™ Method boosted installation efficiency & sales
Discover how Cousins Roofing, Siding & Decks transformed their business with the Hardie™ Trim-Over™ Method.
Contractor Testimonial: How the Trim-Over™ Method puts Hardie® products within reach for more homeowners
See how JB West Roofing contractors are reducing callbacks, finishing jobs more efficiently, and making premium siding projects more affordable.
Contractor Testimonial: How the Trim-Over™ Method opens more doors for premium siding projects
See how Fernandes Construction boosts efficiency, reduces waste, and makes premium Hardie® siding a viable alternative to vinyl projects.
Get hands-on installation support
Receive hands‑on training experience that helps make your jobs with Hardie® products faster, easier, and more profitable. Get connected with the James Hardie sales team to see if there is a Hardie™ Pro Lab event in your area.
Get everything you need to start installing
Access the tools and resources need to implement the Trim-Over™ Installation Method.
