Technical information floor boards

Years of delight with a floor begin with a good preparation of the space where it will be laid, the clean execution of the laying work and proper subsequent cleaning and care.


The right room-climatic conditions are particularly important, as are the properties of the ground.

Construction Site Preparation 34.6K

During laying

Here you can download our official instruction documents for laying pur natur floorboards.

Installation Instructions 727.3K
Surface Treatment 279.8K

After laying

For lasting delight in your boards, here you can download care and cleaning instructions.

Cleaning & Care 77.6K


Important in Winter: Keep humidity at 40-50% 

Keep an eye on humidity. If you don't humidify, humidity in many rooms can drop below 30-35% during the heating period. Too low of a humidity can lead to drying up of the wood and cracks in the floorboards. pur natur assumes no liability in those cases. We recommend humidifying the rooms with humidifier, so that humidity is kept at 45-50%.

Underfloor heating

Solid floorboards on screed with underfloor heating



Floor board


Upper flooring construction height


Minimum screed thickness


Recommended distance from heating pipes


Thickness of the floor board


Layer thickness of the parquet glue


Minimum covering of the heating pipes


Diameter of the heating pipes



All pur natur boards are marked with the CE stamp in accordance with the DIN EN 14342, and fundamentally suitable for underfloor heating.

Solid boards with a thickness of 35mm and a width of 400mm are automatically suitable for underfloor heating due to their material strength. We will gladly provide you with advice on this subject.

3-layer boards in widths of 400 and 450mm can be used without harm with underfloor heating.

In all cases, please pay attention to the room-climatic conditions.

Floor construction

Full-surface gluing on screed

Graphic of solid floorboards with underfloor heating glued to the screed over the entire area


pur natur boards can be glued directly onto the screed. Especially in the case of new constructions, this is one of the most common choices for laying the boards. The direct gluing onto the screed makes it possible to use underfloor heating (heated screed) without any problems. A further advantage is the relatively low construction height on the screed.

Concealed screw connection with joist cross bracing

Scheme of solid floorboards screwed to cross battens


Laying the boards on a “joist cross bracing” is recommended for new constructions or substructures in places where a certain height bridging in necessary in the substructure (as of 100mm UK height). The construction with two wooden joist levels also makes the use of two different insulation materials possible, for example filling/panel material, which in turn means an optimal use of the hollow space in combination with heat and/or noise insulation. 

Screwed from above with joist cross bracing


When screwing from above, drill a 6-10mm deep hole with a 15mm Forstner bit at a distance from both board edges. Then pre-drill with a 3-4mm wood drill (Attention: only through the plank, not into the sub-construction). Then screw the plank in place with the appropriate screw. Appropriate screws are available from pur natur. See also the reference tables for the appropriate screw size. The spacing of the screws is usually determined by the distance between the joists. The recommended screw spacing is +-60cm, the maximum spacing is 100cm.