The Trapezoidal PV Profile “H25” is a purpose-built low-profile aluminum bridge engineered specifically for mounting solar panels on trapezoidal sheet metal roofs with a 25 mm rib height. Unlike full-height trapezoidal profiles that span between ribs or standard PV mounting rails that require separate roof hooks, the H25 sits directly on top of the raised ribs of the trapezoidal sheet, creating a flush, low-profile mounting platform at just 24.5 mm height and 66 mm width. Manufactured from EN AW-6060 T6 aluminum alloy, this specialized solar bridge profile provides a stable, lightweight, and corrosion-resistant base for photovoltaic installations across industrial warehouses, commercial buildings, and agricultural structures with H25-type trapezoidal roofing. ULAMEX supplies this profile at B2B wholesale conditions with European-wide delivery from stock in Poland, making it the practical choice for solar installers and distributors who need reliable trapezoidal roof mounting components in volume.
Technical Specifications
The Trapezoidal PV Profile H25 is extruded from EN AW-6060 T6 aluminum (AlMgSi alloy, solution heat-treated and artificially aged), delivering a minimum tensile strength of 190 MPa, minimum yield strength of 150 MPa, and minimum elongation of 8%. The T6 temper condition ensures consistent mechanical performance that withstands the dynamic wind and thermal cycling loads experienced on exposed metal rooftops over decades of outdoor service.
At 66 mm width and 24.5 mm height, the H25 profile is deliberately compact. Its low profile minimizes wind resistance and aesthetic intrusion on the roofline, while the 66 mm width provides sufficient bearing surface to distribute panel loads across the trapezoidal sheet rib without concentrating stress. The profile is designed to sit flush on H25-type trapezoidal ribs — one of the most widely used industrial roofing profiles across Central and Northern Europe, including popular designations such as T-18, T-25, and equivalent profiles from major European sheet metal manufacturers.
The upper channel of the H25 profile accepts M8 allen bolts (DIN 912) paired with square nuts (DIN 557), providing full compatibility with standard ULAMEX aluminum mid-clamps and end-clamps for secure solar panel retention. This means you can use the same clamp hardware across your entire installation, whether you are mounting on standard PV rails or on the H25 bridge profile.
Available Sizes
| Profile | Width (mm) | Height (mm) | Material | Length (mm) | Fastening to Roof | Upper Channel |
|---|---|---|---|---|---|---|
| Trapezoidal PV Profile H25 | 66 | 24.5 | EN AW-6060 T6 | 4,300 | Bi-metal screws 6.0×25 + EJ screws 5.5×25 | M8 allen bolt + square nut |
*The H25 profile is supplied in a single standard length of 4,300 mm. For projects requiring shorter sections, the aluminum profile can be cut to length on site using standard aluminum cutting tools.
Channel and Fastening System
The fastening architecture of the H25 profile operates on two distinct levels. Roof attachment is achieved using 6.0×25 bi-metal self-drilling screws and 5.5×25 EJ self-drilling screws, which penetrate both the aluminum profile and the steel trapezoidal sheet in a single drilling operation. The bi-metal construction of these fasteners is specifically engineered to prevent galvanic corrosion at the aluminum-to-steel contact interface — a critical detail for long-term durability in outdoor environments where moisture and condensation are unavoidable.
Panel attachment uses the upper T-slot channel, which accepts M8 allen bolts (DIN 912) with square nuts (DIN 557). Clamps slide into position along the channel and are tightened to the module manufacturer’s specified torque. This system is identical to the clamp attachment method used on standard 40×40 and 45×40 PV mounting rails, meaning installers work with the same tools and techniques regardless of the roof type.
The separation of roof fastening (screws from below) and panel fastening (clamps from above) ensures that structural loads are transferred efficiently through the profile without conflict between the two connection systems.
Installation Applications
The Trapezoidal PV Profile H25 is designed for a specific but widespread application: solar panel mounting on trapezoidal sheet metal roofs with 25 mm rib height. This roof type is common on the following building categories:
- Industrial warehouses and production halls — large-area roofs with consistent trapezoidal sheeting where the H25 profile enables rapid, row-by-row solar panel installation without penetrating the primary waterproofing layer beyond the screw points.
- Commercial retail and logistics buildings — flat or low-slope metal roofs on distribution centres, shopping centres, and office complexes where the low 24.5 mm profile height keeps the solar array close to the roof surface, reducing wind uplift forces.
- Agricultural buildings — barns, storage halls, and livestock shelters with trapezoidal roofing where solar installations generate supplementary income while the building continues its primary function.
- Retrofit installations — existing metal-roofed buildings where adding solar capacity without major structural modifications is a priority. The H25 adds minimal additional dead load to the roof structure.
For trapezoidal roofs with rib heights other than 25 mm, ULAMEX supplies full-height trapezoidal PV profiles in 40, 60, 70, and 100 mm heights, as well as trapezoidal bridge segments with EPDM bonding for non-penetrating point-based mounting.
Why Choose This Profile
The H25 profile addresses a specific technical challenge: how to mount solar panels efficiently on H25-type trapezoidal sheet roofs without the complexity and cost of a full substructure system. Where standard PV mounting rails require roof hooks or separate brackets to bridge the gap between the rail and the roof surface, the H25 eliminates this intermediate layer entirely. The profile sits directly on the trapezoidal rib, is screwed down, and accepts clamps on its upper channel — a three-component system (profile, screws, clamps) instead of the typical five-component system (hook, bolt, rail, bolt, clamp).
This reduction in component count translates directly into faster installation times, lower material costs, and fewer potential failure points. For large-area commercial and industrial rooftops where thousands of square metres must be covered efficiently, these advantages compound significantly. The 4,300 mm length covers multiple panel widths in a single rail run, further reducing splice points and the associated labor.
The H25 is not a universal profile — it is precision-matched to 25 mm rib heights. This specificity is its strength: the flush fit ensures optimal load transfer, eliminates wobble, and provides a clean, professional installation appearance.
Standards and Quality Assurance
The Trapezoidal PV Profile H25 is manufactured from EN AW-6060 T6 aluminum per EN 755-2 and EN 573-3. The alloy’s natural oxide layer provides corrosion protection rated for outdoor exposure in corrosivity categories C1–C3 per EN ISO 9223, suitable for the vast majority of European industrial and commercial environments. The bi-metal fastening screws used for roof attachment are specifically designed to address the galvanic couple between aluminum profiles and galvanized steel roofing sheets, preventing accelerated corrosion at the connection interface. ULAMEX operates under EN 1090 certification for structural aluminum components, and all profiles are supplied with full material traceability documentation.
Why Choose ULAMEX as Your Supplier
With over 35 years in the European steel and aluminum wholesale trade, ULAMEX understands the demanding requirements of professional solar installers. We stock the complete photovoltaic mounting system range — from PV profiles and clamps to roof hooks, fasteners, ballasts, and PV triangles — enabling single-source procurement for your entire trapezoidal roof project. B2B wholesale pricing, pallet and full-truck delivery across Europe, and dedicated export support make ULAMEX the reliable partner for volume PV hardware sourcing. Request a quote for the Trapezoidal PV Profile H25 today.
Frequently Asked Questions
What roof types is the H25 profile compatible with?
The H25 profile is designed specifically for trapezoidal sheet metal roofs with a 25 mm rib height. This includes common European trapezoidal sheet designations such as T-18, T-25, and equivalent profiles. For roofs with other rib heights (40, 60, 70, or 100 mm), ULAMEX supplies full-height trapezoidal PV profiles matched to those dimensions.
Does the H25 profile require roof hooks?
No. The H25 is designed for direct screw attachment to the trapezoidal sheet rib using bi-metal self-drilling screws. No intermediate roof hooks or brackets are needed. This direct-mount approach reduces component count and installation time compared to hook-based systems.
Are the bi-metal screws included with the profile?
The bi-metal self-drilling screws (6.0×25) and EJ self-drilling screws (5.5×25) are available separately from our fasteners and accessories range. This allows you to order the exact quantity of screws matched to your project layout and screw spacing requirements.
Can I use the same clamps on the H25 as on standard PV rails?
Yes. The upper channel of the H25 profile uses the same M8 T-slot geometry as the standard 40×40, 45×40, and 80×40 ULAMEX PV profiles. All ULAMEX mid-clamps and end-clamps are fully compatible, so you maintain a single clamp inventory across different roof types on the same project.