Technology as close up the seams between the floor slabs

Joints between floor slabs are among the hard-to-sealing of defects ceiling.This happens because the plate is shifted between a shrinkage of the building, and at seasonal ground motions.Sometimes this offset imperceptible eye, causing the complete destruction of the solution, fill the joints, and the seam is shown again.Closing the usual solutions helps only for a while.Many solve this problem with the help of false ceilings of gypsum board or suspended ceilings, but if the room height does not allow it to perform the necessary finishing sealing joints between floor slabs on the ceiling.

Materials

to safe and putty seams between the floor slabs, it is necessary to carry out preparatory work for the jointing and joint sealing, as well as to acquire the necessary materials having specific properties and suitable for this purpose:

• For deep joints required cement brand NC, which is a feature of the expansion during solidification, allowing him to tightly fill the deep seams and joints;
• for wide seam overlap should be used sealing materials of polyethylene foam or polystyrene or polyurethane foam;
• Primer deep penetration;
• Plastered with residual elasticity, for example, latex;
• serpyanku width not less than 20 cm;
• putty to the ceiling, the preliminary and finishing;

Tool: narrow and wide spatula, brush and spray.

technology of works

1. seams sealed slabs usually simultaneously with the repair of the ceiling, so it is more convenient to make the preparatory work in the complex.From the ceiling removed old paint: latex paint whitewash or moisten with water from a spray, stand 10-15 minutes and remove with a spatula to a wide plaster.If the ceiling is covered with a thick layer of putty, it is cleaned only in those places where it has poor adhesion.If the ceiling has a rust - they are removed by special trains.The joints between the slabs embroider: remove old putty and plaster coming loose in the joints.If necessary, use a hammer.After treatment, the seam should have a U-shaped or slightly extended inwardly form to coat better kept.From the resulting weld remove dust, sweeping brush and wiping it with a damp sponge.
   

   Removal of old coatings from the ceiling and the preparation of joint

2. Inspect the resulting seam.If the width is greater than 3 cm, and the depth is small - it sealed with foam.For this seam slightly moistened with pure water and the foam is applied from a cylinder.Waiting for the start of its expansion and solidification, and then remove the excess by cutting them with a knife so that the seam on the location recess formed a triangular shape with a maximum depth of 0.5 cm. If the seam depth and thus a narrow, it must be sealed with foam, foamed polyethylene or anyanother elastic material.The suture is pre-treated with primer deep penetration and well dried.The seal is fixed by means of moisture resistant sealant at the same surface of the concrete must be dry.The seal lay in the depth of the plate, on the outside seam sealed cement solution mark NC so that there is little uglublenie.Prosushivayut mortar at the junction.
   

   Removal of old coatings from the ceiling and the preparation of joint

   

   putty seam sample in which the foam

3. the prepared groove with a fixed mounting foam or grout is applied putty for rustication with residual elasticity, for example, latex.Align it flush with the surface of the plate.Lay the putty into the seam comfortable using two spatulas: to cause a sufficient amount of filler, and lay it in a narrow seam, compacting and smoothing the inside seam.After applying the putty on the part of its smooth seam wide spatula, removing the excess.
   

   process of applying latex putty

4. solution is dried for a day and proceed to putty joints.Apply seam and the adjacent surface layer of pre-slabs putty and paste over it serpyanku or the masking grid, pushing her into the bed of putty.Iron spatula along the seam.Width serpyanku or mesh should not be less than 20 cm. Plaster dried and after drying align it with sandpaper.Apply another layer of pre-filler with a fine grain to the entire ceiling, aligning its wide spatula.Dried and treated with sandpaper.After that, a layer of smooth finishing putty, dried, leveled with fine sandpaper and paint.
   

   After applying the putty dried her day

5. If the slabs have a drop height greater than 1 cm, the ceiling after the grout will have to be plastered.Apply the plaster composition based on plaster reinforcing masking grid.The ceiling is treated with a special primer "concrete-contact", containing solid particles - it creates a rough layer on the surface of the plates and facilitates the adhesion of the solution.The mesh is attached to the layer of plaster, carefully smoothing it.After complete drying of the plaster for 2-3 days, you can proceed to putty.
   

   technology plastering the ceiling

thus comply ceiling looks completely smooth, with no destruction grout and putty the resulting micro-cracks due to plasticity are invisible.However, this method is not acceptable for apartments in new buildings - the house within three to four years give pellet and slab will inevitably shift.Therefore, for new homes is better to use other types of finishing the ceiling, for example, suspended ceiling.