Facts About Paulownia
Paulownia is native to Southeast Asia but it is used throughout the world with a number of uses from construction to, surfboards to bio-fuel.
Paulownia wood is knot free, which greatly reduces wastage and makes it a good choice for many applications such as our wooden surf and stand up paddle boards.
Paulownia wood is also the lightest known timber other than balsa. It is around two-thirds of the weight of the lightest commercial wood currently being grown in Europe. It’s a third of the weight of Oak and half the weight of Pine. Perfect material for building a paulownia surfboard.
Paulownia wood also has the highest strength to weight ratios of any wood in the world. Auburn University tested the strength of 18lbs p/cubic ft. against balsa with an average weight of 10lbs p/cubic foot.
Strength of modus rupture mor (psi)
Paulownia………5750 Source Dr. R.C. Tang, Auburn University
Wooden Paulownia Surfboard Facts
Hollow wooden surfboards are made of wood and Epoxy. Hollow wooden surfboards particularly have no foam in their development. (Sheets made with foam and wood are normally known as compounds or polish sheets.) Various development strategies are utilised within the surfboard and help reduce the heaviness of the finished board. By and large, hollow wood surfboard are generally 30% to 300% heavier than a standard foam surfboard.
The primary motivation, aside from magnificence, is this is an all the more ecologically neighbourly strategy for development (contrasted with epoxy and polyurethane techniques) which utilises quickly developing, eco-friendly wood, such as paulownia,
The present development strategies dive from the 1930’s Tom Blake paddle boarding technique, which supports a focal stringer with exclusively formed transverse ribs secured with a skin and rails. A cutting edge elucidation of Tom Blake’s work is the border stringer strategy utilised by a few makers, using covered rails as stringers associated with a progression of plywood ribs. This skeleton is then sheathed with 5-8mm-thick wood strips, making a quick empty board with great flex properties.
Paulownia has been thoroughly tested and found to have a higher strength to weight ratio than Balsa!
Auburn University tested the strength of 18 lb p/cubic ft. Paulownia against Balsa, with an average weight of 10 lbs p/cubic foot.
Some Balsa core material is sliced at 3/8 inch with end-grained material. Paulownia can be cut at 3/16 and offer approximately the same strength and weight. Paulownia offers a space saving benefit, being cut half as thick. There is also a significant cost savings because half as much material is needed.
Lighter grades of Paulownia weigh only 14lbs per cubic foot. This is lighter than many Balsa grades.
When considering the large amount of epoxy that Balsa soaks up, Paulownia gains an even larger weight advantage.
Paulownia is easily carved and can hold nails and screws without splitting. It also provides greater stability and flexibility for making molds and models.
Paulownia is about 2/3 the weight of the lightest commercial wood grown in the US. It weighs an average of 14 to 19 lbs per cubic foot. Paulownia is almost 1/3 the weight of Oak (44 lbs p/cubic ft) and half the weight of Pine (30 lbs p/cubic ft).
The specific gravity of Paulownia ranges between 0.23 to 0.30 (23 to 30% of the density of water).
FSC Certified – What does it mean?
Our Paulownia comes with FCS certification which in simple terms means that the timber has been sourced in a responsible manner in terms of forestry management.
It means our supplier adheres to ten rules that cover the essentials of responsible forest management. These rules apply worldwide, across all ecosystems and cultural, political, and legal systems, with specific guidance provided for local interpretation.