Mounting

Solar mounting systems and roof fixings

Mounting hardware is the least glamorous line on a solar bill of materials and the one that determines whether an array is still exactly where it should be in twenty-five years. We stock complete mounting systems and individual components — rails, roof hooks, clamps, flashings and fixings — for pitched tile and slate roofs, trapezoidal metal, flat roofs and ground mounts, all at trade prices with live stock from our UK warehouse.

Matching the system to the roof

Pitched tile and slate roofs use roof hooks fixed to rafters with rails clamped above the covering; hook choice depends on tile profile, and slate demands flashed fixings that preserve the weathering line. Trapezoidal and standing-seam metal roofs take short rails or direct clamps that fix to the sheet profile without penetrating where avoidable. Flat roofs generally use ballasted tub or frame systems that spread load without membrane penetration — roof structure must be confirmed for the ballast weight. Ground mounts trade roof constraints for foundations, from driven piles to concrete, and suit bifacial panels particularly well.

Components and compatibility

Mid and end clamps must match the panel frame thickness — check your panel datasheet's frame height (commonly 30mm or 35mm) before ordering clamps. Rail spans, cantilever limits and fixing frequencies come from the mounting manufacturer's structural tables against your site's wind and snow zones; staying inside those tables is what keeps the system warranty valid. Stainless fixings and appropriate isolation between dissimilar metals prevent corrosion over the system's life. Earthing and bonding provisions, cable management clips and end caps complete the specification.

Ordering for a job

The tidy way to order is per-string: rails, one pair of end clamps, mid clamps for the panel count, hooks or fixings at the specified frequency, plus flashings and cable clips. Our team can sanity-check a mounting list against your panel choice and roof type before you commit.

Quality and longevity

Mounting failures rarely announce themselves early — an under-specified hook or over-spanned rail passes the first winter and works loose over years of thermal cycling and wind load. Anodised aluminium rails and A2/A4 stainless fixings from established mounting brands cost marginally more than unbranded equivalents and carry the structural documentation an MCS installation file expects. Keep penetrations flashed rather than sealed with mastic alone, torque clamps to the stated values, and retain the manufacturer's installation manual with the job records: it is the document a warranty claim or roof inspection will ask for a decade later.