Traditional floor screed is a uniform layer, which during laying has a loose consistency, plastic or liquid, and after a certain period of time it hardens. Such a screed performs the function of a jointless floor underlay, less often jointless floor. The thickness of the wet floor screed is a minimum 5 Cm.

An alternative to a traditional floor screed is a floor made of gypsum-fiber or gypsum-cardboard screed boards.

Division of screeds depending on the substrate, on which they are laid:
• Screed bonded to the substrate – Laid directly on a previously primed substrate; the minimum thickness of the layer of such a primer is 20-25 Mm.
• Screed on the separating layer – Laid on the weak, Lymph, moist substrates; this type of screed is laid on moisture insulation.
• Floating screed – Laid on a layer of thermal and acoustic insulation made of mineral wool or polystyrene boards.

Varieties of screed plates:
• Single plasterboard or gypsum fiber boards – Two layers of plates laid out in passing, which is connected with floor glue and special system screws. The top layer of the plates is rotated at an angle 90 steps to the bottom layer, with a minimum of weld shift 30 Cm.

• Factory prepared composite elements with a lap or tongue and groove joint (total thickness of plates 25 Mm) – These boards are glued together on the plants and screwed with system screws or stitched with staples using a tacker. To increase the thermal insulation and sound insulation parameters of the room, an additional layer of mineral wool panels with a minimum thickness of at least 4 Cm (polystyrene boards do not significantly improve sound insulation).

• Composite boards, factory-combined with a bottom layer of sound and thermal insulation made of mineral wool or polystyrene foam.

In addition to gypsum boards, dry screed systems also include: sealing emulsions, levelling ballasts, gypsum adhesives, putty compounds, edge strips and screws or staples.

Before starting to lay screed elements, circumferential insulation is made from strips of mineral wool. Dry screed plates should be laid on a level ground – slight unevenness (below 5 Mm) aligns by laying an additional layer, e.g.. Corrugated, polyethylene foam, e.t.c. Unevenness of the ground to 20 mm is leveled with putty. Inequalities above 20 mm is leveled with levelling ballast (on wooden ceilings, a layer of carpet should be laid to protect against spillage of ballast).

If the floor is on a floor made on the ground, it is necessary to make a damp-proof horizontal insulation, preventing capillary pulling up of water.