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Glossary of technical terms

Heating a hot-water underfloor heating system in order to dry the screed. This is the responsibility of the person(s) laying the floor. Once screed heating has been completed, laying of the floor covering can commence.

A key figure that describes the durability of an underlayment (when loaded by furniture, etc.)

A key figure that describes the pressure stability of an underlayment

Commonly understood to refer to a moisture protection film. There is no normative distinction between this and a "vapour retarder", with the result that this issue is frequently a cause of confusion during planning.

Commonly understood to refer to a moisture protection film. There is no normative distinction between this and a "vapour barrier", with the result that this issue is frequently a cause of confusion during planning.

A key figure that describes the durability of an underlayment (when subjected to footfall, chairs being moved, etc.)

A long layer, folded into handy formats, which combines the advantages of a roll (long format) with those of a panel (flatness, easy to transport)

Substances in the solid state (e.g. walls, floors, ceilings, etc.)

An additional layer that protects the floor covering from rising moisture from the substrate. This can also be integrated in the underlayment. The sd-value of a water vapour barrier is at least 75m.

Heating a hot-water underfloor heating system to check that it is functioning properly. This is the responsibility of the heating engineer. After functional heating has been completed, it is not yet time to commence laying the floor covering

Surface heating to heat up the floor can also be designed as room heating. Typical systems include hot-water or electric heating systems.

The noise generated when a floor is walked on and heard in the same room.

The residual moisture level that establishes itself after a specific time at a constant climate. This means that moisture level at which concrete/screed no longer releases moisture into the surroundings. Laying of the floor covering can only commence when the equilibrium moisture level has been reached.

A key figure that describes the reduction in impact noise of an underlayment

The noise that is propagated in a solid body.

Information created by experts about a topic. This information is considered the state of the art.

Rules and guidelines that are created and published by a recognised organisation and its standards committees.

A key figure that describes the ability of an underlayment to compensate for minor irregularities (on concrete or screed substrates)

Commonly understood to refer to a moisture protection film. There are also PE films that do not achieve the required sd-value of 75m. These films are unsuitable for use as moisture protection.

Quantity of water in the screed/concrete. Standard measuring methods for this are CM measurement, according to the principle of electrical resistance or gravimetric moisture determination.

A key figure that describes the ability of an underlayment to protect the floor covering (from falling objects)

A key figure that describes the thermal insulation of an underlayment

A key figure that describes the moisture protection of an underlayment

It represents the technical possibilities at a particular time, based on verified insights acquired in the fields of science and technology.

Rules and guidelines that are created and published by a recognised organisation and its standards committees as possible precursors to a standard.

The noise that is transmitted as structure-borne noise into neightbouring rooms (located below, adjacent, and above).

Commonly understood to refer to the IS-value.

Resilient layer between the substrate and floor covering, added to obtain specific properties.

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Links & References

EPLF®  Fact sheet
  http://www.eplf.com/en/

MMFA Fact sheet
  http://www.mmfa.eu/

SELIT Group

  Selitstraße 2
  D-55234 Erbes-Büdesheim
  +49 (0) 67 31 / 96 70 - 0
  info@selit.com
  www.selit.com

Please visit also

OPTITRON® Interior Insulation Systems
www.optitron.com

SELITBLOC® vinyl flooring underlay
www.selitbloc.de

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