Skip to content
James Hardie HardieTrim 5/4 Smooth Fiber Cement Trim Board, 1 in x 5.5 in x 12 ft, Primed, HardieZone 10
Regular price $43.94Orders start at $399 — combine any items to reach the minimum. Learn more
James Hardie HardieTrim 5/4 Smooth Fiber Cement Trim Board, 1 in x 5.5 in x 12 ft, Primed, HardieZone 10
This is a James Hardie HardieTrim 5/4 Smooth fiber cement trim board, 1 in thick x 5.5 in wide x 12 ft long, engineered for HardieZone 10 hot, humid climates and supplied factory primed for field painting. One order is one 12 ft board weighing about 36.3 lb. It pairs with Hardie Plank lap siding as corner, fascia, window and door trim.
Key Features:
- Fiber cement durability: Non-combustible fiber cement trim that resists water, rot and pests and will not ignite when exposed to a direct flame.
- Smooth finish: Smooth board face delivers clean, modern trim lines.
- HardieZone 10 engineered: Engineered for Climate for HZ10 regions with hot, humid conditions and blistering sun.
- Factory primed: Supplied primed and ready for field painting in your chosen color.
- Full 5/4 profile: True 1 in x 5.5 in x 12 ft dimensions for substantial trim presence at corners, fascia and openings.
- Code recognized: Recognized under ICC-ES ESR-2290, ESR-1844 and ESR-2273 and approved by Miami-Dade, Florida and TDI.
- Class A fire rating: Class A fire rating when tested in accordance with ASTM E84.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | James Hardie |
| Sell unit | 1 board, 1 in x 5.5 in x 12 ft |
| Product line | HardieTrim 5/4 |
| Profile / style | Smooth face trim board |
| Color / finish | Primed (ready for field painting) |
| Dimensions | 1 in x 5.5 in x 12 ft (5/4 board) |
| Thickness | 1 in |
| Exposure | 5-1/2 in |
| Material | Fiber cement (sand, water, cellulose fibers, Portland cement) |
| Fire rating | Class A per ASTM E84; non-combustible per ASTM E136 |
| Approvals | ASTM E84; ASTM C1186 Type A Grade II; WUI Listed; ICC-ES ESR-2290, ESR-1844, ESR-2273; Miami-Dade; Florida FL889; TDI EC-23; and others as listed |
| Zone | HardieZone 10 (HZ10) |
| Warranty | 30-year, non-prorated warranty on Hardie fiber cement products |
| Weight | 36.3 lb per board |
| Intended use | Exterior trim for corners, columns, fascia, doors and windows; also suitable as fascia board |
Coverage & How Much You Need:
Each board provides 12 linear feet of 5.5 in trim. Measure corner, fascia and opening runs and add a little for cuts; boards butt at trim joints per the manufacturer's installation instructions.
Fit and Compatibility:
Pairs with Hardie Plank lap siding and other Hardie siding products; suitable trim companions include other Hardie Trim Boards, fiber cement, real wood, engineered wood, vinyl, or coated corrosion-resistant aluminum. Fasten with corrosion-resistant, galvanized or stainless fasteners approved by ICC-ES ESR-2290, spaced per the Wind Load Tables.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One primed HardieTrim 5/4 Smooth board, 1 in x 5.5 in x 12 ft.
Q: Is it painted or primed?
A: It arrives primed, ready for field painting; ColorPlus factory finishes are a separate product option.
Q: Where can I use it?
A: Corners, columns, fascia, doors and windows, and anywhere trim board is needed with Hardie siding.
Q: What climate is it made for?
A: HardieZone 10 products protect homes from hot, humid conditions and blistering sun.
Q: What fasteners should I use?
A: Corrosion-resistant, galvanized or stainless steel fasteners approved by ICC-ES ESR-2290, spaced per the Wind Load Tables.
Q: What warranty applies?
A: Hardie fiber cement products carry a 30-year, non-prorated warranty.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
This 5.5 in HZ10 primed 5/4 board is the go-to trim width for matching 5/4 window casings and corner boards on Hardie Plank jobs in hot-humid regions. Prime all cut edges and field-paint with exterior paint per the manufacturer's instructions; blind nailing hides fasteners for the cleanest look, though high-wind codes may require face nailing. Choose a ColorPlus finished trim board instead if you want a factory-applied color with a 15-year finish warranty.
Cut fiber cement with a dust-reducing saw and follow silica dust safety practices, cutting outdoors with HEPA extraction where possible.
Order the James Hardie HardieTrim 5/4 Smooth 1 in x 5.5 in x 12 ft primed board for long-lasting HZ10 trim.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
