2mm Aluminium Retention Trim - 2.4m Length

Keep green roof materials securely in place with strong, easy-to-install aluminium retention trim.

This 2.4m aluminium retention trim is designed to hold growing media, gravel, and other surface materials on green roof systems. Made from high-strength 2mm 1050A-grade aluminium, it provides a neat, long-lasting edge detail without restricting water flow. With pre-drilled drainage slots and a lightweight profile, it's quick to install and compatible with most flat and green roof constructions.

Choose a variant:

Retention Trim Size

Starting at £22.27

excluding shipping cost

Features + Benefits

2.4m length for continuous roof edge coverage
2mm aluminium for strength with lightweight handling
Ideal for green roofs, terraces, and ballast retention
Pre-drilled drainage holes to allow water flow
L-shaped profile helps prevent media displacement
Powder-coated finish for corrosion resistance
Fire-rated A2-s1,d0
Fast and simple to fix to most substrates
Recyclable material, made in the UK
Custom lengths or shapes available on request

Specs & Options

Material: 1050A Grade Aluminium
Thickness: 2mm
Length: 2.4 metres
Finish: External-grade polyester powder coating
Fire Rating: A2-s1,d0
Fixings: Pre-drilled drainage holes
Use Case: Green roofs, gravel retention, sedum borders
Lead Time: 3 to 5 working days
Colours: RAL/BS options available
Custom Shapes/Sizes: Available on request

Installation / Usage Instructions

Fix the trim along the roof perimeter using compatible fixings. Position it at the edge of green roof zones to contain gravel or growing media. Ensure slots face outward for proper drainage. Can be cut to size as needed.

Need to keep your green roof layers neat and secure?

This 2mm aluminium retention trim in 2.4m length is the smart choice. Order today or contact the Online Metal Store team for custom sizes or project advice.