NBS Source
GreenCoat® PLX Snaplock® Seam
Compare variants


The Snaplock® seam system is extensively used in Europe and the United States of America, where the system has proved itself in the extremely varied climate. The system gives an aesthetically pleasing finish whilst avoiding the industrial finishes found in other seam systems.

Features and benefits:

  • Manufactured from lightweight (350 g/m² zinc coated) corrosion resistant steel.
  • Ultraviolet (UV) light and scratch resistant.
  • Seams are available in 25 or 38 mm formats.
  • GreenCoat® colour coated steel products from SSAB Swedish Steel use Swedish rapeseed oil in the coating, producing a sustainable colour coated steel for exterior buildings. The patented BT coatings (Bio-based Technology) offer environmental advantages (100% recyclable) and increased performance.
  • The Snaplock® seam system can be laid on a ventilated timber substrate, composite panel or direct on insulation, using special warm roof fixing clips.
  • Snaplock® is much simpler and requires less skill/ hand tools than the traditional standing seam. The profile contains an undercloak and an overcloak – the undercloak side is fixed with a stainless steel fixing clip with the overcloak side then snapped into place.
  • The system can be provided as a complete roof kit including all flashing, matching rainwater products and ancillaries.
  • Also available in GreenCoat® S280 commercial grade steel.


Snaplock® can be mounted on all roof build-ups, the only pre-requisite being that it is fully supported.

Suitable substructure materials:

  • Ventilated 18 mm-thick weather and boil proof (WPB) plywood.
  • Ventilated oriented strand board OSB3.
  • Hard metal board.
  • Composite panel.
  • Rigid insulation.


ISO-Mat Pro® underlay is recommended by the manufacturer depending upon the application.


  • 25 mm seam: SM-EH-Snap-25 (SM-EDH-Snap-25 for fixing to rigid insulation).
  • 38 mm seam: SM-EH-Snap-38 (SM-EDH-Snap-38 for fixing to rigid insulation).
  • Flashing clips: SM-ELH-27.

General information




Insert project requirements, maximum length: 12 m.

Uniclass 2015

Pr_25_71_51_15 Carbon steel sheetsPrimary


H31/10 Metal

H31/120 Metal

Specification data - Carbon steel sheets Enhanced data




Insert project requirements, maximum length: 12 m. Alternative (bespoke) lengths are available, if they are logistically possible to transport. Consult manufacturer for details.



425 mm (25 mm seam).




Acorn Brown RR827 / SS0434.

Anthracite Grey RR2H8 / SS0087.

Brick Red RR7F2 / SS0742.

Cottage Red RR29 / SS0758.

Leaf Green RR594 / SS0874.

Metallic Copper RR979 / SS0778.

Metallic Dark Silver RR41 / SS0044.

Metallic Gold RR042.

Metallic Silver RR40 / SS0045.

Metallic Sterling RR974 / SS6045.

Mountain Grey RR23 / SS0036.

Nordic Night Black RR33 / SS0015.

Quarry Grey RR287 / SS0244.

Silver Fir Green RR5J3 / SS0975.

Snow White RR19 / SS0001.

Special order.

See 'Options' and insert requirements.

Product Reference

GreenCoat® PLX Snaplock® Seam


25 mm.

Minimum pitch: 7°. Nominal centres: 425 mm.

Coefficient of thermal expansion

0.012 mm/m·K.

GreenCoat PLX offers an approximately 50% lower expansion coefficient in contrast to all other metals. This property allows for longer profiles/sections (consult technical literature for details) and prevents buckling and deformation for many decades.


Snaplock® System Installation Guide

Snaplock® System Installation Guide

GreenCoat Installation Guide

GreenCoat Installation Guide

GreenCoat Colours

GreenCoat Colours

Similar products from Metal Solutions Limited

GreenCoat® PLX Batten Roll

GreenCoat® PLX Batten Roll

GreenCoat® PLX Shingles

GreenCoat® PLX Shingles

GreenCoat® PLX Standing Seam

GreenCoat® PLX Standing Seam

GreenCoat® S280 Reveal Panel

GreenCoat® S280 Reveal Panel

GreenCoat® S280 Snaplock® Seam

GreenCoat® S280 Snaplock® Seam