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148 items found.

K2 Pitched Roof Systems


K2 pitched-roof mounting systems are built for installers who want fast fitting, secure connections, and a clean finish across a wide range of roof types. From compact rail solutions for tile roofs to robust rails for larger arrays, K2’s modular approach makes it easy to choose the right system for the roof structure, loading requirements, and installation style.

  • Insertion System – Best for tile roofs, corrugated fibre cement, corrugated sheet metal, and trapezoidal sheet metal when you want a sleek, low-profile finish and fast installs (no standard module clamps). 
  • MiniRail System – Best for trapezoidal sheet metal roofs. Short-rail solution designed to reduce components and speed up installs, ideal where full-length rails aren’t needed.
  • MultiRail System – Best for trapezoidal sheet metal and corrugated sheet metal roofs. Flexible short-rail platform for versatile roof layouts, balancing speed and adjustability.
  • SingleRail System – Best for pantiles, corrugated roofs (metal or fibre cement via hanger bolts), and standing seam metal roofs (via seam clamps). Classic single-layer rail setup for straightforward installs and broad compatibility.
  • SolidRail System – Best “cover-most-roofs” option: suitable for pan tiles, plain tiles, slate, plus trapezoidal and corrugated metal, corrugated fibre cement, and standing seam (using the appropriate roof attachments). Heavy-duty rail option for higher loads and larger spans, often chosen for bigger arrays or tougher site conditions.
  • BasicRail System – Best for trapezoidal sheet metal roofs; it’s a floating rail concept (BasicLock) designed to manage thermal expansion. Cost-effective rail solution for standard pitched-roof PV builds with reliable performance.
  • CrossHook / CrossRail CrossHook – A flexible rail system compatible with tile and standing seam roofs via the relevant roof attachments. The system is useful on uneven roofs or when optimising rail positioning.


[1001052] S-5! Seam Clamp Check Availability
S-5! Seam Clamp
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S-5!  | Alternergy

S-5! Seam Clamp


For fastening of K2 System parts on standing seam metal roofs.


Available to order within 2-3 working days. Contact sales on 020 3763 7000 or at sales@alternergy.co.uk.

[79-s-5-GXM10] S-5-GXM 10 Mini insert 229 In Stock
S-5-GXM 10 Mini insert
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S-5!  | Alternergy

S-5-GXM 10 Mini insert


S-5-GXM 10 Mini insert - specifically for use with the S-5-K Grip Mini clamp.

GXM-10 insert is suitable for use on:

  • SpeedDeck® SpeedDeck®
  • LYSAGHT KLIP-LOK® 406
  • McElroy Metal Mirage
  • AEP Span Klip-Rib®
  • Metal Sales Clip-Loc
  • Safintra Saflok 410
  • Safintra Saflok 700
  • Domico Dach®And other similar profiles


Please refer to product datasheet for full list of compatible roof materials.


Note: K-Grip seam clamps can come with 2 different ‘mini inserts’: one smaller S-5-GXM 50 (Mini) and one bigger S-5-GXM 10 (Mini), which is more popular in this country. Still, it's important to check if the insert you require fits in the roof covering before ordering.

[79-s-5-GXM50] S-5-GXM 50 Mini insert Check Availability
S-5-GXM 50 Mini insert
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S-5!  | Alternergy

S-5-GXM 50 Mini insert


S-5-GXM 50 Mini insert - specifically for use with the S-5-K Grip Mini clamp.

GXM-50 insert is suitable for use on:

  • LYSAGHT KLIP-LOK Classic® 700
  • LYSAGHT KLIP-LOK 700 Hi-Strength®
  • Stramit® Speed Deck Ultra®
  • Fielders KingKlip® 700
  • And other similar profiles


Please refer to product datasheet for full list of compatible roof materials.


Note: K-Grip seam clamps can come with 2 different ‘mini inserts’: one smaller S-5-GXM 50 (Mini) and one bigger S-5-GXM 10 (Mini), which is more popular in this country. Still, it's important to check if the insert you require fits in the roof covering before ordering.

[79-S-5-K-Grip-Mini] S-5-K Grip Mini S-5-K Grip Mini   - Image 2 22 In Stock
S-5-K Grip Mini
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S-5!  | Alternergy

S-5-K Grip Mini clamp


The S-5-K Grip Mini clamp was specifically developed to fit Klip-Rib® and other bulb snap-together seams. The design utilizes multiple inserts (sold separately) in order to accommodate a variety of bulb snap-together profiles. Each insert has a unique shape that allows for a tight fit and provides increased holding strength over other attachment options. Compatible with most common metal roofing materials excluding copper.

The S-5-K Grip Mini is a bit shorter than the S-5-K Grip and has one base bolt rather than two.


All included hardware is stainless steel. Each mini clamp is supplied with 1 x M8 bolt.

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