125mm x 50mm x 3400mm Plastic Wood - Subframe Application

125mm x 50mm x 3400mm Plastic Wood - Subframe Application

Build your deck on a foundation that will never rot with the 125mm x 50mm x 3400mm Recycled Plastic Joist. This robust, rectangular profile is the ideal structural element for a long-lasting, maintenance-free decking subframe, offering superior performance where traditional timber fails.

Get the foundation your project needs while delivering a powerful environmental return. This durable product is made from 100% recycled waste plastic, utilising a world-first technology to repurpose soft household waste. By actively keeping plastic out of landfills and incinerators, you are directly contributing to net-zero goals and immediately improving your project's sustainability.

Please note that this product does not come with fixings. For assembly, use heavy-duty wood screws (like 6×90mm yellow zinc woodscrews, requiring a 5mm HSS pilot hole) or, for extra rigidity, M8 cup square hex bolts with M8 × 30mm repair washers, M8 nuts, and M8 dome nuts.

Key Features & Benefits

• Eco-Conscious Choice: Actively diverts plastic waste from landfills and incineration, enhancing your project's environmental and net-zero credentials.
• Complete Moisture Immunity: No Rot, Warp, or Decay: Ideal for wet environments like roof terraces, poolside areas, jetties, or decking that has limited under-deck ventilation.
• Resistant to Pests: Zero Maintenance: Impervious to wood-boring insects, fungus, and moss, eliminating the need for periodic chemical treatments, staining, or sealing.
• Dimensionally Stable: Long-Term Integrity: Unlike wood, it resists swelling, cracking, or splintering, ensuring your decking boards remain level and secure for decades.
• Optimised Size: Structural Support: The 125mm x 50mm dimension provides excellent rigidity, supporting the main load of your deck boards when installed at the manufacturer's recommended span/centres.
• Easy to Work With: Fast Installation: Can be easily cut, drilled, and screwed using standard woodworking tools (pre-drilling is recommended to prevent heat build-up).

Applications

This rectangular profile plastic wood joist does not require painting or preserving and is ideal for building your wood plastic decking subframe.  Also available are 50mm x 50mm x 3900mm square profiles, 100mm x 100mm x 3400mm, 60mm x 30mm x 3900mm, 100mm x 25mm x 3400mm and 100mm x 25mm x 3400mm profiles.

Contact Us

Our friendly and knowledgeable First Fence sales team is ready to help! Give us a call at 01283 512 111 or simply start a conversation using our online chat tool today.