120mm x 240mm Green Treated Garden Railway Sleeper 2.4m

Product Overview

Softwood railway sleeper measuring 2.4m in length, pressure treated green to UC3 standards for reliable outdoor performance.

At 2.4m long, this sleeper spans typical bed and border dimensions, aligns with standard fence and deck layouts, and reduces the number of joints required in construction.

The timber is pressure treated with a brown preservative, which penetrates deep into the grain to protect against fungal decay, rot, and insect attack. 

This treatment extends service life in outdoor conditions where the sleeper is exposed to air and rain, provided cut edges are re-sealed with an appropriate preservative.

The 120 × 240mm profile is a mid-to-large section sleeper that bridges the gap between lighter garden sleepers and the heaviest-duty profiles. 

It’s ideal for medium-to-tall retaining structures, where the increased thickness and depth give it the strength to handle higher soil loads without movement.

Please Note: Timber is a natural material and variations in colour, grain, and finish should be expected. Dimensions are nominal. Treat cut or drilled edges with a suitable preservative to maintain durability.

Features & Benefits

• UC3 green pressure treatment: Preservative treatment penetrates the timber to protect against fungal decay, rot, and insect attack, giving the sleeper reliable durability for long-term use outdoors above ground.
• 2.4m length: Spans common garden bed and fence bay dimensions, reducing the need for multiple joints, speeding up installation, and creating cleaner finishes with less material waste.
• Workable softwood: Can be cut, drilled, and fixed with standard woodworking tools, allowing easy adjustments on site for precise fitting.
• Natural timber finish: Supplied with a green tint from treatment that will weather to a silver-grey patina if left untreated, or can be over-coated with stains and oils for a customised look.
• 120 × 240mm profile: A substantial section well suited for retaining walls, terraces, steps, and raised beds where soil loads are heavier.

Applications

• Retaining walls: Provides the strength and depth needed for medium-to-tall walls, holding back soil with stability.
• Terracing and level changes: Forms solid structures for creating usable spaces on sloped ground.
• Garden steps: Delivers a durable framework for wide, heavy-duty steps that won’t shift under use.
• Raised planters: Builds substantial raised beds with fewer layers and a bold, architectural finish.
• Structural landscaping: Suitable for projects where engineered strength and long-term durability are required.
  
  

Installation Guidance

• Fixings: Use galvanised or stainless steel sleeper screws, coach bolts, or landscape fixings (typically 150–250mm). Pre-drill pilot holes to reduce splitting and ensure secure fastening.
• Base preparation: Lay sleepers on a firm foundation such as compacted MOT Type 1, sharp sand, or paving slabs. A stable, level base prevents long-term movement.
• Drainage: Maintain airflow and encourage water run-off. Where sleepers are used in raised beds or low retaining roles, backfill with free-draining material to avoid waterlogging.
• Cut ends: Always re-seal any cut or drilled areas immediately with an appropriate end-grain preservative to maintain protection.
• Jointing & stability: Stagger joints for added strength, and secure stacked courses together with long fixings or steel brackets as required.
• Alignment: Use a string line or spirit level during installation. Check regularly to keep runs straight and true.

Compliance & Performance

• Treatment classification: UC3 - suitable for external, above-ground use where timber is exposed to rain and air circulation.
• Service life: Pressure treatment provides long-term resistance to decay; regular inspections and retreatment of cut edges will maximise durability.
• Usage note: Not designed for permanent ground contact (UC4) or for structural building use.