When it comes to windows and doors, there can be many elements, that are hard to understand. But don't worry, below we will give you more in-depth information about the pine we use! Pine is the kind of wood most often used for Scandinavian windows. 

What does the tree rings in the tree mean for my window?

The tree rings are an important indicator that the wood is of good quality. Trees grow not only in height but also in width. The closer together the tree rings are, the colder it has been, where the tree has grown. Each individual ring consists of 2 zones - a lighter ring that shows the growth in the spring/summer period, and a dark ring that shows growth in the autumn/windows period.


Pine as a raw material

The slow annual growth rate is something we as window manufacturers look for, to ensure our customers the very best raw materials for their new doors and windows. Of course, old and slow-growing pines also have many knots. As a window manufacturer, we are not very happy with these knots, because they cause resin sweats, which does not look good. But for the quality of the windows and doors it's great. In modern sawmills, the tree trunks are cut into planks used for window production. The knots are cut out and subsequently, the planks are assembled longitudinally with what we call finger joints so that you end up with a highly directional strong piece of processed pine. It is this engineered timber Klarwindows uses for all our windows and doors.

Are certifications important?

At Klarwindows we only use slow-growing pinewood from Estonian sawmills that are FSC and PEFC certified. These certifications ensure replanting and responsible forestry.

The Forest Stewardship Council (FSC) brand is a guarantee that you can buy timber products with a clear conscience. In an FSC forest, no more wood is cut down than the forest can reproduce. At the same time, the FSC-certification is a guarantee that forest management takes many considerations into the biodiversity of the forest and that the people working in the forest receive education, safety equipment, and a reasonable salary.

Wood offers many environmental benefits and is a raw material that is renewable. Therefore you should consider replacing other materials, such as plastic, steel, aluminum, and cement with wood. 

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