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    The most frequently requested technical terms

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Abrasion classes

The abrasion class is determined in tests by mechanical stress. Depending on how long a floor covering withstands exposure to sandpaper, it is classified in one of the wear classes between A1 (the lowest resistance) and A5 (the highest resistance).

Abrasion resistance

Wear resistance of wood depends on the density of the wood. The wear resistance of finished substrates varies depending on the type of surface treatment (oiled, waxed, sealed).


Synthetic resin, which is a component of paints, varnishes and adhesives.

AD (Air dried)

AD refers to the natural wood drying process, in which the wood is dried by the ambient air rather than by technical means.

Adhesive net

Fabric placed under mosaic parquet, which holds together the installation units.

Airborne sound

Acoustic sound generated by talking, music and walking in a room.


Reddish-yellow hardwood with a medium hardness. Exposure to light causes it to darken rapidly, giving it a reddish-brown colour.

Annual rings

Refers to the ring-shaped grain of the wood of a perennial plant, especially a tree, visible in cross-section.


Hard hardwood with a colouration that can turn out whitish, light yellow, but also olive-brown. A special feature is the distinctive annual ring patterns, which give the ash wood a vivid surface appearance.


Basic cleaning

Removal of heavy soiling that cannot be removed by maintenance cleaning. In the process, the old cleaner residues are removed, so that a new initial care must be carried out afterwards.

Bending stiffness

Describes the resistance to deflection of materials.


Biocides are chemical substances used to control living organisms. These include, for example, fungicides and insecticides that damage the human organism.

Blind bottom

Subfloor, which is not a screed, but wood-based panels or boards.


Blue fungi occur mainly in softwoods and transform wood constituents due to sufficient moisture. The altered substances and the fungus itself cause a colour change that persists even after the fungus dies.

Braiding pattern

Is a classic parquet installation pattern in braided look, which is created by parallel arrangement of the strips and right-angled rotation of such formations. This also includes the cube formation.

Brinell hardness

Measurement in which the degree of hardness of wood is determined. Determines the mechanical resistance of wood to mechanical point loads. The resulting degree of hardness is important for wear resistance.


Care treatment

Is also referred to as initial treatment and is done by applying a sacrificial layer by appropriate care product after the final cleaning of the building.


Is a classic installation pattern. Cube-like dressing with four vertically arranged parquet strips bordered by four circumferential bars.

Center position

Support layer for multi-layer parquet and floor, which is made of wood-based materials or softwood.


Bevelled surface on a plank at 45° or 60° to the plane.

Chateau planks

A term for room-length solid wood planks. Like the name, these planks are magnificent and need suitable large rooms.

Cherry tree

The medium-hard wood has a yellowish to reddish colouration as well as a strong annual ring pattern and darkens into a reddish brown.


Clamps, which are made of spring steel and are used for a floating installation of certain wooden boards. This type of installation is also called installation with clamps.

Click connection

When installing with a click connection, the tongue and groove interlock seamlessly by simply snapping into place. This allows for easy, fast, glue-free and floating installation, which allows for disassembly and re-installation without any problems.


Elastic, renewable natural material obtained from the bark of the cork oak and processed into a fine-grained granulate.

Country style plank

Multi-layered plank with a layer of wood, which includes a continuous lamella or two lamellas glued next to each other. The installation is carried out as in a floating manner often using a click connection.

Country style planks

The country style planks, like the chateau planks, run through the entire room – without interruption.

Creed drying

Gradual heating of the damp screed, leading to readiness of covering. Takes place after the functional heating.


Is a classic installation pattern and is also called a checkerboard pattern. In case of this pattern, the parquet strips are arranged in squares and alternately aligned horizontally or vertically.


Decorative wax

Pigmented wax used for colour treatment of wood surfaces.


Ratio of mass to volume of a material.


Heterogeneous mixture in which the substances neither dissolve into each other nor chemically combine. They are water-based solid particles that are distributed evenly for a short time by vigorous shaking.

Distance spacers

Distance spacers are small blocks made of wood or plastic, which are used for temporary fixation of the expansion joint between the plank and rising structural component. After installation, they are removed again.

Douglas fir

The reddish-yellow softwood has a plain to decorative wood grain and darkens when exposed to light. Douglas fir is a medium hard wood and less susceptible to moisture. A special variant is the Douglas fir wood from North America, known as Oregon Pine.

Dry screed

Ready to lay screed elements made of anhydrite, concrete, gypsum fibre materials or brick.


Elasticity against wear

Prevents muscle fatigue on parquet floor so that the muscles of the feet and legs do not fatigue.

Electrical resistance

Is measured in ohms. Wood has an electrical resistance of 10⁸ to 10¹⁰ ohms. For this reason, wood is a good insulator and has a slight electrostatic charging power.

End grain wood

Also referred to as head grain. Wood in which the cross-section is the usable area and in which the annual rings are partially or even completely visible.

Expansion joint

Necessary distance of a wood floor from all rising structural components with a width of 10 to 15 mm. The joint creates enough space for the wood to expand during the natural swelling process and is concealed using skirting boards.

Exposed joint

If very wide planks are installed, it is recommended to provide them with an exposed joint of about 2 mm between the individual planks.

External tongue

Loose wooden tongue used for installing round grooved parquet strips.


Felt gliders

Adhesive or screwable protective caps made of felt to be placed under furniture legs.

Fibre direction

Indicates the direction of the wood fibre in the tree trunk. A distinction is made between radial direction and tangential direction.

Final cleaning of the building

Cleaning, which is carried out immediately after installation.

Floating screed

Liquid anhydrite screed, which due to its consistency runs smoothly and by itself.


Frame, which surrounds a door.


Decorative edge finish, which clearly stands out from the overall surface.

Front side

Narrow side of the wooden planks.

Functional heating

First heating of an underfloor heating system after installation of the screed to check its defect-free construction. This is followed by screed curing, which leads to the drying of the screed.

Fusible filler

Filler for repairing scratches or damage. It must be heated and then included.



Is the counterpart to the tongue in the tongue-and-groove connection of floor planks.

Grout solution

Filler for large joints.


Half-offset formation

Is a classic installation pattern in which the parquet strips are staggered by half and arranged parallel to each other in absolute regularity. This installation pattern looks strict, but calm and is well suited for small rooms.

Hard wax

Consists of natural or artificial components and is used for surface treatment of wooden floors. Wax is characterised by high abrasion resistance and has a water- as well as dirt-repellent character.

Hardening time

Specific period of time required for a building material (paint, screed, adhesive) to harden.


Inner wood core in hardwood that is darker and more resistant compared to the outer sapwood.

Heating rosette

Ring-shaped orifice made of plastic or wood to cover joints on heating pipes.

Heating screed

A floor structure integrated with heating pipes, which gives off heat comprehensively.


With this installation pattern, the planks are arranged at an angle of 90 degrees.


Impregnation against moisture.


Impact sound

Structure-borne sound generated by contact with the ground and propagated as airborne sound.

Initial care

Is also referred to as care treatment and is done by applying a sacrificial layer by appropriate care product after the final cleaning of the building.

Installation pattern

Arrangement of boards in different patterns such as half-offset formation, herringbone, braided pattern, ship floor and cube.

Installation unit

Combination of several parquet strips, which are fixed on the bottom side with an adhesive net.

Installation with clamps

Floating installation method of solid wood planks using steel clamps.

Insulating underlay

Additional layer between the substrate and the ground with insulating function.


Yellow-reddish to light brown tropical hardwood that darkens into a reddish brown.


A yellowish grey to light brown type of wood that darkens into a brown-olive wood tone.



The reddish-brown type of wood has a vivid colouration with fine wood grain and is one of the hardest parquet woods.


Small cracks in the planks, which can occur due to the natural shrinkage and swelling behaviour of wood in fluctuating indoor climates, due to humidity.



A yellowish grey to light brown type of wood that darkens into a brown-olive wood tone.



Is an artificially produced floor covering with a photo-realistic decorative surface made of resin-impregnated paper. Considered particularly durable, easy to clean and can be installed as a floating floor.


Medium hard softwood with distinct wood markings and a yellow colouration that darkens into a reddish-brown wood tone when exposed to light.

Lip of the groove

Upper or lower part of the groove.


Lye is a kind with which the surface of the planks can be treated. Lye can be used in combination with other means of surface treatment.



Is a precious wood with a reddish-grey colour that darkens into a reddish-brown.

Maintenance care

Refreshing of the sacrificial layer by additional application of a care product. This is done after the maintenance cleaning has been performed.

Maintenance cleaning

Removal of light soiling with using a cleaner without layer-forming substances. Subsequently, the maintenance care is carried out.

Moisture barrier

Plastic sheet designed to prevent the diffusion of moisture in a building component. As a rule, the barrier is made of PVC and has a thickness of 0.5 mm. This is also called a vapor retarder or vapor barrier.

Mosaic parquet

Solid parquet, made of small parquet strips, which form an installation unit.

Muscle fatigue

Premature foot and leg muscle fatigue on hard floors, especially during standing activities. This is rarely the case with parquet, as it is considered to be resilient to footsteps due to the structure of the wood.



Has a light grey-brown wood, which darkens by sunlight and can have very different patternings. Oak is offered in various product variants and is characterised by a high degree of hardness. If the surface is smoked, oak wood has a dark brown colour. In some cases, lighter sapwood may also be present.


Oil is a type of surface treatment that can be used to treat the planks. This gives the wood surface a protection and, depending on the oil, a new colour.


Parquet belts

Solid wood strip with tongue and groove.

Parquet strip

Solid wood strip, which has a circular groove for installation with external tongues.


Light yellowish to reddish brown coniferous wood with strongly pronounced annual rings. The medium-hard wood looks particularly rustic.

Planed planks

Simple planks of hardwood or softwood in undefined moisture content with planed surface and tongue and groove joint. As a rule, they dry out strongly and form shrinkage joints, which makes them less suitable for residential use.


Planks are the individual elements of a wooden floor. DIPRO® planks are available in different dimensions, types of wood and colours.

Polishing machine

Machine with rotating polishing wheel for working in oils and waxes on wooden floors.


Wood, metal or plastic rails for covering transitions between two floor coverings.

Pull bar

Also called assembly iron. It is a tool for attaching the last parquet strips of an installation row.


Radial direction

Direction within a tree trunk from the bark to the pith.

Ready for application

Term describing that the substrate meets the guidelines for installing parquet (dry, level, solid and horizontal).

Ready screed

Consists of individual dry screed panels ready for installation, made of anhydrite, concrete, gypsum or brick.


Sanding of the wood surface and resealing with varnish or new treatment with oil or wax. The frequency of renovation depends on the thickness of its top layer.


Greenish-yellow hardwood, which darkens into golden brown.

Room length

Room-length planks have the same length as your room.


Reddish-grey to dark red wood with a very hard solidity.


Sacrificial layer

Film-forming care product layer applied to the underlying parquet for protection. If this layer is worn out, after the basic cleaning, a new care must be applied.


Light area of a wooden trunk surrounding the dark heartwood.

Scrap wood

Scrap wood includes wood that has already fulfilled its intended use and, depending on its condition, is further processed into chipboards or for energy use.


Subfloor ready for covering, usually made of cement, anhydrite or asphalt. It must be dry, even, firm and horizontal.


Seal Film-forming varnish layer on wooden floors.


Film-forming varnish layer on wooden floors, which protects the wooden floor from wear.

Selected load

Selected pressure load on a surface.


Hardening of adhesives or screed.

Ship floor

Is a classic installation pattern in an irregular formation, where the parquet strips are arranged in parallel in an uneven sequence.


The removal of moisture or drying of the wood causes a natural reduction in volume.

Single layer parquet

Solid parquet made of small parquet strips, which form an installation unit. Solid parquet, made of small parquet strips, which form an installation unit.


Small parquet sticks.


Squared lumber is used as a substructure for wooden floors. Their wood moisture content must not exceed the value of 15%, a gap of no more than 50 cm must be observed during installation.


Over a period of 4 to 5 weeks, the wood is evenly fumigated with ammonia. The chemical reaction of basic ammonia and the tannic acid in the wood turns it dark. This results in a colour spectrum from hazel to deep black. It also makes the wood softer, easier to work with, and more light-resistant than non-smoked wood.


Soap is a type of surface treatment that can be used to treat the boards.

Solid wood

Pure solid wood.

Solid wood plank

A solid wood plank is made from one piece of wood and is the most natural form of wooden floors.


Natural increase in volume of wood due to moisture absorption.


Yellowish-white coniferous wood, which is one of the soft woods. It is used, among other things, for the wear layer of country style planks and darkens into a reddish yellow.


Chemical agent for surface treatment and colouring of wood, metal or plastic.

Standard climate

A room climate of 20° to 22° C air temperature at a humidity of 50 percent is recommended.


Tangential direction

The direction within a wooden trunk that is parallel to the annual rings.


A tree is referred to as conical if it rises in a more conical shape toward the crown than average.


Large-pored hardwood of golden yellow colour, which darkens into medium brown.

Thermal bridge

Temperature loss due to faulty construction in the building, which can lead to the formation of condensation, mold and profound structural damage.

Thermal conductivity

Physical property that defines the heat flux density within a substance.

Thermal resistance

Physically measurable resistance that opposes the flow of heat in a homogeneous body or component of a certain size. The higher the thermal resistance, the more thermally insulating the material.


The tongue is part of the tongue and groove connection of parquet elements and is the counterpart to the groove. The tongue can also be inserted as a free connecting element between two grooves or worked directly onto an edge of the wooden slats as a tongue and groove joint.

Tongue and groove joint

Profiling parquet strips with planed tongue and groove on the opposite side.

Toothed spatula

Spatula with cog profile for applying adhesive.

Top layer

In multilayer parquet used, made of real wood or cork, treated in the factory.

Torn joint

If the lateral parquet elements are accidentally glued during sealing, it will not be possible to form a uniform joint of the wood during the heating period. For this reason, there is a large traction force, which may tear the parquet apart. The result is a large joint, which is also called a torn joint.


Underfloor heating

Heating pipes installed in the screed.



Firmly defined wood surface, in which the planks are divided based on their surface to obtain as uniform an installation pattern as possible during installation. Variant criteria include the presence of knotholes, cracks, grain inclination, sapwood and natural colour differences.



Is a fine-grained hardwood with a greyish brown to dark brown colour, which may occasionally have a purple tint.

Water seal

Water-based film-forming varnishes for sealing wooden surfaces.

Wax filler

Wax-based filler for repairing scratches and damages to the parquet surface.


Abrasion of the substrate due to use, which can be prevented with appropriate care. In case of heavy wear, wooden floors must be sanded and resealed.


Also called panga panga and is one of the hardest types of wood. Its light-brown colouration takes on a blackish brown colour over time.

White glue

Dispersion of PVAC for gluing parquet strips with tongue and groove joints.

Wood chippings

Wood residue for which there is no longer any use.

Wood decor

A surface image that photorealistically mimics the character of wood is printed onto a carrier layer.

Wood filler

Wood paste made of dyed hard wax for repairing scratches and damage.

Wood grain

The grain of a tree trunk means the expressions of the different characteristics such as annual rings, knottiness and wood colour.

Wood inlay

Incorporated image motifs in the parquet.

Wood moisture

Naturally occurring moisture content in wood, which is only contained as residual moisture in air-dried wood. For solid wood planks, the moisture content is between 8 and 11 percent.

Wooden paving

Solid, untreated parquet made of sharp-edged wooden blocks, the wear layer of which consists of abrasion-resistant end-grain wood.

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