Construction And Repair

Technology semi floor screed: pros are two ways to perform

Uneven flooring can spoil the look of any interior.On this floor is impossible to lay any flooring or laminate.The flooring is not only not hide irregularities, but also spoil faster.Therefore, the first step in the repair of any premises must be screed: semi-dry, dry or wet.It all depends on the time in which you have to invest, the efforts and costs for which you'll have to decide.


characteristic of moist alignment ↑

semi-dry screed - a leveling equality throughUse a hard semi-dry cement-sand mortar, the strength of which is provided by a metal grid or the addition of polypropylene fibers.This type of screed maturity is a cross between a wet and dry screed.If the dry screed start further work can be immediately when wet - in 2-4 weeks (28 days), then the

semi - after 4 days.

Fiberglass: 10 square meters.meters of space it will require 0.27 kg

This semi-dry screed has a number of advantages.When used in the course are inexpensive, but quality materials.After the cement-sand layer is applied, aligned and polished rule, he did not require additional treatment: either dub or humidify it, as is done in liquid screed cement-sand mortar, it is not necessary.This gives a solid foundation for a smooth monolithic floor, which is not afraid of cracking and shrinkage.

When installing semi-ties do not have to worry that the fluid will seep out of solution and leaks to the ground floor.The semi-dry screed of Fiber not only durability and resistance to mechanical impact, but also has acoustic and thermal insulation characteristics.Installation of such ties can be carried out using mechanical devices that greatly facilitates the process.

When used semi-dry floor screed?↑

  • limited repair time;
  • thin slab and the likelihood of fluid flow on the lower floors.

Semi-dry floor screed is applied on such a basis:

  • hardwood floors (in the homes of the old model);
  • concrete floors (modern high-rise buildings);
  • compacted sand or gravel-sandy soil (basements, homes, ground floor).

What materials will be needed?↑

semi-dry screed made sand-cement mortar.To ensure the strength and solidity of the screed using a reinforced metal mesh that is filled poluzastyvshim solution, or simply added to the solution fibrovolokno.Polypropylene fiber prevents the formation of cracks.For semi-dry floor screed with addition of fiberglass materials are needed:

  • bead tape penoizol (poliizol, izolon);
  • sifted sand;
  • cement;
  • fibrovolokno;
  • water.
Using the grid antisettling
use antisettling grid

antisettling steel mesh reduces the formation of cracks, and in the case of cracking holds a monolithic material.For semi-dry cement-sand screed on the basis of the grid will need:

  • skirting tape;
  • antisettling mesh and wire;
  • sand;
  • cement;
  • water;
  • hardeners and modifiers.

To semi-floating screed on the basis of which further provides thermal insulation, also used such materials:

  • tile adhesive or Self leveling solution - to smooth large irregularities;
  • surfaced the web material (as an option - with asphalt roofing felt enhanced) - for waterproofing;
  • expanded polystyrene, extruded polystyrene or mineral wool - for warmth.

solution for alignment ↑

Mixing cement-sand mortar on the floor
Mixing cement-sand mortar on the floor

To prepare the solution with the use of fiberglass in Pneumosupercharger poured 120 liters of sand, 150 g fiberglass, 50 kg of cement.Consumption of fiber to the room of 20 square meters.- 0.54 kg.Everything is mixed for 3 minutes, after which water is added, the solution was further mixed and fed through the hose to the place where it will be carried screed.

Mechanized feeding solution from Pneumosuperchargers
Mechanized feeding solution from Pneumosuperchargers

When using reinforcing mesh for solution take 1 part Portland cement, 3 parts 400 and sifted sand.The mixture can be prepared on-site laying screed, even without the use of mixers.First poured sand then cement.The dry mixture was slowly added water.With it, the main thing is not to overdo it.The solution should be ductile.If you take it in hand, it will be easy to form.But the water to drain from it should not be.

also kneading added impact modifier, making tie even more plastic and heat resistance (important for installation of underfloor heating).The solution was thoroughly mixed and then applied to a substrate.In addition to conventional solution using sand concrete and other dry mixes ready for floor screed, which diluted with water according to the instructions for use.The solutions were added coupler hardening accelerators, plasticizing materials, reinforcing fibers, and lightweight fillers, such as foam or expanded clay aggregates.A thorough kneading of the solution - a guarantee of quality for future ties.The tools that will be useful for semi-dry floor screed:

  • Pneumosupercharger with a hose;
  • concrete mixer;
  • sander;
  • level;
  • beacons;
  • termorezka;
  • trowel;
  • rule (2-3 m);
  • plate tamper for tamping;
  • spatula;
  • polyurethane or wooden float.

semi-dry screed: process technology ↑

Option 1 - "Semi-dry floor screed» ↑

  • cleaning premises

As with any screed, you first need to prepare the ground.To do this, clean the remnants of old floors, sweep away any debris and examine the rest of the surface.

  • primer base

If the presence of deep pits, sharp ridges between the plates, then they are covered with a primer or with special glue.It is important that if the flaws were, they were significantly smoothed.Priming also prevents the absorption of moisture basis.

  • Laying damper tape

use of edge tape is especially important when installing underfloor heating.After all, the temperature affects the future quality of the floor.Tape or buy ready-made or cut into strips large roll of polyethylene foam.It will provide sound insulation and security ties.

  • Laying solution

After preparation of the solution (as is described above), laid the first layer.Its thickness - okolo20 mm.The first layer of the solution is well tamped, then reinforcing mesh is placed.Between the pieces of a grid tie pieces of wire or welded.Top still poured and tamped 3-4 smpolusuhogo solution.If the solution was added fibrovolokno, additional reinforcement in the form of a net is no longer required.

  • Alignment surface
Leveling floor beacons profile

to achieve a perfectly flat surface is working on leveling grouted.A laser level differences determined base.An important step in the work is the installation of beacons.It may be the profiles for the drywall, which is placed in a solution, and then dub them rule the surface and remove excess material.To install the beacon of the profiles, the entire surface rascherchivayut lines.

distance between them should not exceed the length of the rule by which the floor is to be leveled.Along the lines sprinkled pile solution, and which fit the profile.On the edge profiles established rule that is pulled in the direction of the profiles.Excess material is removed, and deepening a little loose and re-added to the solution.In the profiles using the rules and removed all unnecessary.

  • Grout solution

To overwrite the semi-solution using a grater.When the solution hardens several profiles are removed, and traces of them immediately filled with a solution and polished.Used for this grinding machine.

  • Care screed

After the screed is laid, it is necessary to cover with foil to keep it from drying out too quickly.For the maturation of cement paste needed to provide moisture conditions throughout the day with a thickness styazhki5 see. Within 4 days can be placed decorative floor covering from linoleum to wood flooring and vinyl tile.After such ties any material runs out perfectly aligned on the floor.

Option 2: reinforced with ↑

This method is called "semi-floating screed" is performed using a conventional solution and metal mesh laid on a layer of thermal insulation materials.

  • cleaning premises

The first stage - the cleaning of ties with the basis for all waste, including the remnants of the old floor.

  • Irregularity

When you see the quality of the floor, then if you want you can pour some glue bulges and irregularities.It is important that there was no sharp transitions, depressions, bumps.Bulge knock or scraped, moistened with water, after which the applied solution or paste.With the application of self-leveling is not necessary to hurry, otherwise the whole fluid drained in one place and the effect will be the opposite.To smooth roughness used: TekhnoNIKOL, Bikrost, linokrom.

  • Soundproofing

Around the perimeter of the room lay the ribbon of polyethylene foam (also suitable izolon).Krepjat skirting tape with liquid nails, double-sided tape or silicone.The bands should be slightly wider than the thickness of a future tie.Excess can be trimmed.The resulting edge will be the layer between the wall and the screed, soundproofed, cushioning and durability.

  • waterproofing and insulation

To prevent the ingress of moisture in bathrooms or rooms of the first floor, all seams are hermetically glued, and then produce a fusing with the web material.Rolls preheated to the substrate and fusing the bottom edge of the wall, the strips are glued to each other.A cheaper option to use with roofing bitumen impregnation.

  • floating screed

next stage - laying insulation layer.Before that you need using the laser level Gaugeable the entire area and to identify irregularities, make appropriate marks on the walls.In places the presence of deep grooves will need to build an additional layer of polystyrene foam.To adjust the thickness of the polystyrene by the necessary use termorezku.She cut the necessary thickness layers of foam.

  • Installation Beacons

on flat floor surface screwed beacons.In this case - screw on wood.They are easy to twist and adjust the height.This method is suitable for the foam as it is light and loosely lying on the floor, and at any movement loses its place.When laying a layer of expanded polystyrene will need to make holes in the sheets so that they are well formed in places where the lighthouse stands.Sheets should be stacked very tightly, without unnecessary gaps.If there is a need to lay wires or communication, in that the foam is easy to cut the necessary holes - slots.When laying the pipes turn izolona and wires are placed in corrugated stainless steel or plastic.When laying the slabs of expanded polystyrene leave unencumbered path between them.This is done in order to avoid having to mark time on the fragile plates from foam.

  • laying layer of mortar and mesh

solution or kneaded in the tank with the construction of the mixer or on the floor.The finished mixture is semi-dry with a spade scatter layer B2 smpo entire surface of the premises.Next, fit the grid.If it consists of several pieces, they are fixed to each other by means of a wire.On top is covered with a new layer and spread with a solution.It must be carefully trample down.Next - with alignment rules and level.If irregularities are formed, the places fill up the solution.To make it better grappled with the previous layer, the lower layer of slightly loosened.

  • Grout

penultimate stage would be floating and grinding.With this we achieve a perfectly smooth surface.When the screed has hardened, a metal spatula knock mounds and place of their education levels.For this purpose the frozen surface is wetted with an atomizer, solution spread on top of sand and cement (1: 1), triturated wood or polyurethane float.After leveling the surface once again checked by the rules and level.Next beacons are removed, and the place where they were installed, in addition overwritten.Grinding surface grinding machine.

Grinding screed
Grinding screed

semi-dry screed has the strength and durability thanks to the use of reinforcing mesh fiberglass or additives.In order to insulate the floor at the same time, using the technology of "floating screed" with the laying of a thermal insulation layer.Providing structural strength, tight deadlines floor ready for further use, a variety of methods and means - it is different from other types of semi-dry screed.Video will help to fully understand the present and the process technology.

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