UPM Plywood has released a new water repellent plywood that enables construction even in changing weather and humidity conditions. The water repellent yet breathable surface of WISA-SpruceWR slows down the absorption of moisture into the panel while allowing it to evaporate. Source: Timberbiz
WISA-SpruceWR provides significant benefits especially for developers and builders.
“Wood construction is growing in popularity and we want to offer innovative and responsible solutions to it,” Olli Wirén, End Use Manager at UPM Plywood said.
“Our water repellent WISA-SpruceWR plywood can withstand momentary exposure to rain without the need to immediately protect it from getting wet. The builders at the site can focus on the actual construction work as they no longer need to spend time covering materials when the weather changes.”
WISA-SpruceWR is available in four thicknesses (12–21 mm), in straight-edged and easy-to-install tongue-and-groove options.
Made entirely of spruce, WISA-SpruceWR’s technical properties are the same as those of regular WISA-Spruce plywood: the panel’s strength and light weight make it ideal for all kinds of frame construction, such as walls and floors.
“Wood swells when it gets wet, which can cause problems and extra work in construction. Thanks to the water repellent treatment on the surfaces and edges, WISA-SpruceWR retains its dimensional accuracy and shape better in case of sudden rain and also recovers faster than usual,” Riku Härkönen, Product Manager at UPM Plywood said.
“The construction work becomes easier and faster when the worked edges lock in place more securely during installation, the seams remain tight and the panel does not require a long time to stabilise before installation,”
The water repellent treatment applied to WISA-SpruceWR during manufacturing is done with a wood-based substance that contains no harmful chemicals.
“The panel’s water repellent coating is breathable, which means that it also allows moisture to evaporate. And because less moisture is absorbed into the panel, it also dries faster than usual. The evaporation of moisture from the wood prevents possible structural and health problems later on,” Härkönen points said.
WISA-SpruceWR is made in Finland at UPM Plywood’s Pellos Mill from wood sourced from responsibly managed forests.
