VTI reaches new innovation to the window industry

01. Jun 2015

As the only producer of glulam VTI (Vinderup Træindustri) has reached the goal of developing a new glulam product, that has been both heat treated, finger jointed and is energy efficient.

VTI ENERGYwood is the name of VTI’s newly developed product series – heat treated glulam for the window industry and outdoor market. The heat treatment means that the stability of the wood is enhanced by up to 50 %, the insulation properties by over 30 %, and the woods biologic durability is enhanced from class 3-4 to 2-3 in accordance with norm EN350-2. - Heat treated wood itself is not a new invention, but the combination of finger joints and heat treatment is. At

- Heat treated wood itself is not a new invention, but the combination of finger joints and heat treatment is. At VTI we are very proud of the fact that we are the only producer to have reached the goal of developing heat treated finger jointed glulam. We have been working intensively on its development for the past five years, and the development has been done in close cooperation with the Danish Technological Institute, says director of VTI Bjarne Andersen. Big expectations for the new product - We at VTI have big expectations of the heat treated

Big expectations for the new product - We at VTI have big expectations of the heat treated

- We at VTI have big expectations of the heat treated glulam, because it matches the trend of increased interest for environmentally friendly raw materials. Because of this, the goal is to provide products with immediate effect. We estimate that the new product will fit right in with both window and outdoor products in parts of Europe. We have already sold the wood to the outdoor industry and the window- and door manufacturers in both Denmark and Norway, says VTI’s sales manager for windows, Jan F. Boch and he adds:

- The processing method and properties of the heat treatment have been known for decades and is therefore well documented. The wood achieves a greatly enhanced resistance to rot and mold, it also achieves enhanced stability and insulation capability. The heat treatment, or the new paradigm – thermal modification – is a drying process that changes the woods chemical composition. Subsequent surface treatment can be done with the same surface systems that are used for normal pine, which means there will be little or no need for technical changes in our customer’s production. They won’t even need to invest in new production equipment. VTI have tested the heat treated wood’s tensile strength, carrying capacity, screw firmness, deformation and deflection. All tests comply with the requirements for production of windows and doors cf. DDV. VTI ENERGYwood also contributes to the compliance of the building regulations of 2020 concerning the insulation properties for windows.  

- The processing method and properties of the heat treatment have been known for decades and is therefore well documented. The wood achieves a greatly enhanced resistance to rot and mold, it also achieves enhanced stability and insulation capability. The heat treatment, or the new paradigm – thermal modification – is a drying process that changes the woods chemical composition. Subsequent surface treatment can be done with the same surface systems that are used for normal pine, which means there will be little or no need for technical changes in our customer’s production. They won’t even need to invest in new production equipment. VTI have tested the heat treated wood’s tensile strength, carrying capacity, screw firmness,

VTI have tested the heat treated wood’s tensile strength, carrying capacity, screw firmness, deformation and deflection. All tests comply with the requirements for production of windows and doors cf. DDV. VTI ENERGYwood also contributes to the compliance of the building regulations of 2020 concerning the insulation properties for windows.