Although this comparison of costs is derived from construction of a walkway, it's obvious results can apply to any situation where the two materials would be continually be exposed to water and at the mercy of other adverse weather conditions outdoors.
Assumptions In the case of wood, it is assumed that maintenance will be undertaken annually after 2 years, and replacement be necessary after 7 years. The annual cost of maintenance involving both labour and materials is averaged at £176 per annum. This figure to not take account of inflation.
In the time period illustrated, a 100m walkway cost £1300 in timber and just £370 using Recycled plastic materials.
Conclusion The costs are initially higher for recycled plastic but the lifetime costs very much lower compared to treated wood.
* Established in 2000, WRAP (Waste and Resources Action Programme) is an independent body funded by all 4 UK Governments and the EU, with responsibility for promoting recycling programmes throughout the UK.
Kedel's Tear Drop Tongue and Groove boards/profiles will never rot, warp, splinter or crack. They are UV protected to the highest standard to minimise fading. A far more cost effective material compared to wood. Comes in various colours and is made from crushed recycled CD cases.
A traditional Picnic Table that looks and feels like wood but behaves like plastic. No rot, no painting, no maintenance. Made from 100% British sourced recycled plastic (crushed CD cases and old coat hangers). UV protected against fading in direct sunlight. Will still be looking good when all the wooden picnic tables have rotted away.
Recycled Plastic Planks 150 x 25mm - A popular profile used for raised beds, planters, garden edging, fascia boards, barge boards, and quayside buffers. Tough, solid board that will never rot or need preservatives or paint