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3 Fast Facts on Bamboo PVC

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Industry Insider

3 Fast Facts on Bamboo PVC

Bamboo-based PVC resists expansion and contraction, heat retention, and more. 

By Toby Bostwick July 20, 2021
Apex bamboo decking
This article first appeared in the Sept/Oct 2021 issue of Pro Remodeler.

If you think of the traditional composites and the way that they’ve been used over the years, it’s always been a wood-plastic composite made with some type of wood filler. Now, however, contractors can find composites made out of bamboo. Here’s what remodelers need to know about bamboo-based PVC composite decking.

Bamboo is a sustainable, lightweight grass

Typically sourced from Asia and South Africa, bamboo is a renewable resource that can be harvested quickly, and it grows back 30 times faster than wood. Because it is grass, bamboo also makes the planks lightweight.

Thanks to low water absorption, bamboo fibers expand and contract less, which results in increased stability versus other composites.

Wood composites can weigh three to four pounds per linear foot. Bamboo-based PVC weighs in at two pounds. From a contractor’s standpoint, if you’re talking about a 20-foot board, that difference in weight can make a huge difference over an entire project when you're carrying them around a jobsite. 

Bamboo composites resist water absorption

One of the reasons bamboo composites weigh less is that the boards retain less water weight. Water likes to hold onto wood fibers, where you don’t get that same kind of absorption with bamboo as the cellular structures are materially different. Bamboo is much more compact than wood, whereas wood has a much more open-cellular structure, giving it the ability to absorb pressure treatment, water and stains.

Similarly, bamboo composites release heat faster than wood-based composites, making the boards cooler in summer.

Bamboo expands and contracts less

Thanks to low water absorption, bamboo fibers expand and contract less, which results in increased stability versus other composites. With bamboo-based composites, contractors will see less movement based upon the temperatures outside. When it’s really hot outside, decking materials are at their fullest and will shrink when the weather gets colder. You want to control that kind of movement as best you to avoid inconsistent gaps.

The less any of the material expands or contracts with temperature, the more true to form it is from when you’re cutting to installation. With less shrinkage and the right additives and extrusion process, bamboo composites give more consistency in installation, and as the weather does change, homeowners will not see as much gapping.

Toby Bostwick is the vice president of Product & Brand for Fortress Building Products.

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