The reveals that make the Architectural Panel grid
Hardie™ Architectural Trim is the aluminum extrusion system for Hardie® Architectural Panel: corner trims, vertical Y and H joint trims, horizontal Z trims, J and transition trims, and base trims, all 10 ft. long. It forms the slim reveals that make the panel grid.
Hardie™ Architectural Trim is the aluminum extrusion system for Hardie® Architectural Panel: corner trims, vertical Y and H joint trims, horizontal Z trims, J and transition trims, and base trims, all 10 ft. long. It forms the slim reveals that make the panel grid.
Hardie Architectural Trim is the aluminum half of the Architectural Collection. Hardie Architectural Panel is laid out as a grid, and these extrusions are what make the grid: the slim corner trims at inside and outside corners, the vertical Y and H trims at the vertical panel joints, the horizontal Z trims at the horizontal joints, J and 2-piece J trims at openings and edges, transition trims where panel meets lap siding, and base trims that give the bottom of the wall a clean reveal or act as a starter. James Hardie groups them four ways, corner, joint and end, transition and base, and every piece is 10 feet long.
It is worth being clear about how much is documented. James Hardie's dealer system lists ten sizes across the four groups for Ontario, while the product page shows sixteen profile names, and no document we could find says which size belongs to which name, so we confirm the exact profile against your drawings when you order. The only installation guidance is inside the US Architectural Panel instructions: fasten with a staple, finish nail or flat head nail and never a button or bugle head, cut with an 80-tooth non-ferrous blade, and put a membrane between the aluminum and any preservative-treated wood. There is no Canadian document, fire listing or warranty that names the trim.
Available at Pro Materials in Newmarket, Ontario, supplying contractors, builders, and homeowners across York Region, the GTA, Simcoe County and Durham Region. All products are available on a quote basis; contact us for wholesale pricing and current availability.
Slimline inside and outside corners, including low-profile and 45° versions for bay windows.
| Length | 10 ft. (120 in.) |
| Dealer listed sizes | 1.25 x 1.25 · 1.625 x 1.625 · 2.125 x 2.125 · 2.25 x 3.25 in. |
| Profiles shown by James Hardie | Low-Profile Inside, Low-Profile 45° Inside, Inside, Low-Profile 45° Outside, Low-Profile Outside |
Vertical Y and H trims for vertical butt joints, and horizontal Z trims for horizontal control joints.
| Length | 10 ft. (120 in.) |
| Dealer listed sizes | 0.375 x 1.5 · 0.375 x 1.75 · 0.375 x 1.875 in. |
| Profiles shown by James Hardie | Vertical Y, Vertical H, Low Profile Horizontal Z, Horizontal Z Flashing |
J and 2-piece J trims for openings and edges, and transitions from panel siding to lap siding.
| Length | 10 ft. (120 in.) |
| Dealer listed size | 0.375 x 1.125 in. |
| Profiles shown by James Hardie | Low Profile Inside Corner Transition, 2-piece J, Low Profile Outside Corner Transition, J, Vertical Siding H-Mold Transition |
A raised reveal base with a ledge the panels rest on, or a minimal L base that acts as a starter strip.
| Length | 10 ft. (120 in.) |
| Dealer listed sizes | 0.25 x 3.4 · 0.3 x 1.5 in. |
| Profiles shown by James Hardie | Raised Reveal Base, L Base |
| Item | What it is for |
|---|---|
| Hardie® Architectural Panel | The panel the trims are designed for |
| Joint sealant | Continuous bead at Z flashing joints |
| Non-permeable membrane | Between the aluminum and any preservative-treated wood or furring |
Order quantities and lead times may vary. Contact us for availability.
No Canadian instructions exist. These points are from James Hardie's US Architectural Panel requirements (HS20110, July 2024)
Fasten trims to wood with a staple, finish nail or flat head nail. Do not use button head or bugle head fasteners
Install inside corner trims first, set panels into them, and slide the outside corner trim behind the last panel before the final row of nails
Vertical orientation: a Y or H trim at every vertical joint, which James Hardie treats as part of the water management
Horizontal joints: low-profile Z trim or Z flashing trim, at least 1/4 in. clearance and a 1/16 in. gap between Z flashing pieces with a continuous sealant bead
Windows: the 2-piece J trim with caulk and Z flashing. James Hardie does not recommend plain J trim at windows and doors
Cut with a mitre saw and an 80-tooth non-ferrous metal blade. Use tin snips for flashings
Where the trim meets preservative-treated wood, install a non-permeable membrane between them, and use hot-dipped galvanized or stainless fasteners
How to install Hardie Architectural Panels and trim (James Hardie, US)
Each one opens the section of our guides that answers it for Hardie™ Architectural Trim and the products beside it on the shelf.
Submit your spec list and we'll respond with pricing and availability - usually within one business day.
Get a wholesale quote
Tell us the product, colour, and quantity - we'll handle the rest.
