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Glossaire

The Glossary

The benchmark for definitions and concepts in the screed, thermal insulation, and acoustic solutions sector.

# terms · updated regularly

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A

Aa
Hat styles

Anhydrite screed: definition and characteristics

A calcium sulfate-based liquid screed with near-zero shrinkage, preferred for underfloor heating systems.

B

Xx
Thermal insulation

XPS: definition and use under a screed

Rigid insulation made of closed-cell extruded polystyrene, which absorbs very little water and withstands high compression.

Tt
Thermal insulation

Thermal bridge: definition and weak points of a floor

Area of a building element where insulation is interrupted or weakened, through which heat escapes faster than elsewhere.

Ee
Thermal insulation

EPB: definition and what it requires of a floor

Belgian regional regulation setting the minimum energy performance of new and renovated buildings, including floor insulation.

Rr
Thermal insulation

R-value: definition and calculation

How well a laid layer holds back heat, equal to its thickness divided by its lambda, in m².K/W: the higher it is, the better the layer insulates.

Uu
Thermal insulation

U-value: definition and what it means for a floor

The amount of heat passing through a whole building element, all layers included, in W/m².K: the lower it is, the better the element insulates.

Cc
Implementation

Crawl space: definition and effect on the screed

A ventilated void arranged between the natural ground and the lowest floor of a building, avoiding direct contact with the soil.

Vv
Thermal insulation

Vapour barrier: definition and role under a screed

A membrane that slows the migration of water vapour through a building element, to prevent it condensing within the insulation.

Tt
Thermal insulation

Thermal conductivity: definition and reading lambda

A quantity measuring how readily a material lets heat pass, written as lambda and expressed in W/m.K.

Dd
Acoustics

Decoupling: definition and principle

The principle of removing all rigid contact between the screed and the structure, in order to block the transmission of vibration.

Ss
Implementation

Screed reinforcement mesh: definition and purpose

A steel mesh embedded in the screed, which distributes stresses and limits the opening of shrinkage cracks.

Cc
Hat styles

Concrete screed: definition and loose usage

A common term that in reality describes a cement-based screed, often confused with a concrete slab.

Ii
Implementation

Infill block: definition and role in the floor

A precast element that fills the space between the beams of a floor, before the structural topping is poured.

Ff
Implementation

Floor levelling: definition and purpose

A thin layer of mortar applied to correct the flatness defects of a substrate before the floor covering is laid.

Ss
Implementation

Self-levelling compound: definition and use

A fine, free-flowing mortar applied in a thin layer to correct the flatness of a substrate before the floor covering is laid.

Tt
Hat styles

Traditional screed: definition and composition

A sand-cement mortar screed, mixed and levelled by hand on site, the most versatile of all screeds.

Ee
Implementation

Edge insulation strip: definition and role

A flexible strip installed against walls before pouring, which prevents any rigid contact between the screed and the walls.

Ss
Implementation

Screed layer: definition, role, and skills

A professional specializing in surface preparation and the installation of screeds prior to flooring application.

Ee
Thermal insulation

EPS (expanded polystyrene): definition and uses

Expanded polystyrene, a rigid thermal insulation used under screeds in panels or as poured insulating mortar.

Ss
Thermal insulation

Spray-applied PUR: definition and principles

Polyurethane foam applied via spray, which expands on-site to form a continuous, seamless insulating layer.

Rr
Acoustics

Resilient underlayment: definition and role

A flexible layer placed between the subfloor and the screed that absorbs vibrational energy from impacts.

Ff
Acoustics

Floating floors: definition and acoustic principles

A flooring system separated from the structure by a resilient layer, designed to block the transmission of impact noise.

Aa
Hat styles

Anhydrite screed: definition and characteristics

A calcium sulfate-based liquid screed with near-zero shrinkage, preferred for underfloor heating systems.

Ll
Hat styles

Liquid screed: definition and characteristics

A self-leveling screed poured in a fluid state that spreads on its own and levels out without the need for manual screeding.

Bb
Hat styles

Bonded screed: definition and principle

A screed poured directly onto the substrate, with which it forms a solid, unified structure without any intermediate layer.

Ff
Hat styles

Floating screed: definition and principle

A screed poured over a compressible layer and separated from the walls, with no rigid contact with the structure.

C

Cc
Hat styles

Concrete screed: definition and loose usage

A common term that in reality describes a cement-based screed, often confused with a concrete slab.

Cc
Implementation

Crawl space: definition and effect on the screed

A ventilated void arranged between the natural ground and the lowest floor of a building, avoiding direct contact with the soil.

D

Dd
Acoustics

Decoupling: definition and principle

The principle of removing all rigid contact between the screed and the structure, in order to block the transmission of vibration.

E

Ee
Implementation

Edge insulation strip: definition and role

A flexible strip installed against walls before pouring, which prevents any rigid contact between the screed and the walls.

Ee
Thermal insulation

EPB: definition and what it requires of a floor

Belgian regional regulation setting the minimum energy performance of new and renovated buildings, including floor insulation.

Ee
Thermal insulation

EPS (expanded polystyrene): definition and uses

Expanded polystyrene, a rigid thermal insulation used under screeds in panels or as poured insulating mortar.

F

Ff
Acoustics

Floating floors: definition and acoustic principles

A flooring system separated from the structure by a resilient layer, designed to block the transmission of impact noise.

Ff
Hat styles

Floating screed: definition and principle

A screed poured over a compressible layer and separated from the walls, with no rigid contact with the structure.

Ff
Implementation

Floor levelling: definition and purpose

A thin layer of mortar applied to correct the flatness defects of a substrate before the floor covering is laid.

G

No items found.

H

No items found.

I

Ii
Implementation

Infill block: definition and role in the floor

A precast element that fills the space between the beams of a floor, before the structural topping is poured.

J

No items found.

K

No items found.

L

Ll
Hat styles

Liquid screed: definition and characteristics

A self-leveling screed poured in a fluid state that spreads on its own and levels out without the need for manual screeding.

M

No items found.

N

No items found.

O

No items found.

P

No items found.

Q

No items found.

R

Rr
Acoustics

Resilient underlayment: definition and role

A flexible layer placed between the subfloor and the screed that absorbs vibrational energy from impacts.

Rr
Thermal insulation

R-value: definition and calculation

How well a laid layer holds back heat, equal to its thickness divided by its lambda, in m².K/W: the higher it is, the better the layer insulates.

S

Ss
Implementation

Screed reinforcement mesh: definition and purpose

A steel mesh embedded in the screed, which distributes stresses and limits the opening of shrinkage cracks.

Ss
Implementation

Screed layer: definition, role, and skills

A professional specializing in surface preparation and the installation of screeds prior to flooring application.

Ss
Implementation

Self-levelling compound: definition and use

A fine, free-flowing mortar applied in a thin layer to correct the flatness of a substrate before the floor covering is laid.

Ss
Thermal insulation

Spray-applied PUR: definition and principles

Polyurethane foam applied via spray, which expands on-site to form a continuous, seamless insulating layer.

T

Tt
Thermal insulation

Thermal bridge: definition and weak points of a floor

Area of a building element where insulation is interrupted or weakened, through which heat escapes faster than elsewhere.

Tt
Thermal insulation

Thermal conductivity: definition and reading lambda

A quantity measuring how readily a material lets heat pass, written as lambda and expressed in W/m.K.

Tt
Hat styles

Traditional screed: definition and composition

A sand-cement mortar screed, mixed and levelled by hand on site, the most versatile of all screeds.

U

Uu
Thermal insulation

U-value: definition and what it means for a floor

The amount of heat passing through a whole building element, all layers included, in W/m².K: the lower it is, the better the element insulates.

V

Vv
Thermal insulation

Vapour barrier: definition and role under a screed

A membrane that slows the migration of water vapour through a building element, to prevent it condensing within the insulation.

W

No items found.

X

Xx
Thermal insulation

XPS: definition and use under a screed

Rigid insulation made of closed-cell extruded polystyrene, which absorbs very little water and withstands high compression.

Y

No items found.

Z

No items found.
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