Waterproofing of the floor in front of the screed

floor waterproofing before the screed is needed for two reasons: firstly, it prevents the penetration of moisture vapor from the basement or lower floor of the concrete screed, and secondly, it protects floor slab against possible water leakage in wet areas.It is especially important to perform high-quality waterproofing the floor in front of the screed on the ground floor of a private house, which has no basement.Water vapor and capillary moisture rising from the ground, often have an acidic or alkaline environment, they actively interact with the components of the concrete, and a few years later screed can be covered with a network of cracks and start to crumble.

Types floor waterproofing before the screed

There are several ways of waterproofing the floor in front of the screed.In private houses without a basement as the first layer of waterproofing is often used gravel and sand cushion.Under the first subfloor poured gravel or crushed stone, tamped it, and then poured it with sand.The resulting cushion due to the presence of air gaps between the particles prevents capillary rise of moisture from the soil.At the same time on the water vapor is virtually no protection, so you need additional film parogidroizolyatsiya.

Parogidroizolyatsionnye film as waterproofing the floor in front of the screed is used not only in private homes, but also in urban apartments.The films allow you to create a liquid-tight cover and protect the screed from water vapor and moisture coming from the floor slabs, as well as the plate itself from the water leakage in wet areas.

third type of waterproofing the floor in front of the screed - surface waterproofing.It is performed on the basis of mastics bitumen or rubber, applied in several layers.A distinctive feature of this tie is the ability to fill any uneven surface, which is especially useful when a large number of pipe penetrations.

In addition, to make the concrete floor slabs waterproofing properties they can be treated with a solution of the impregnating waterproofing.This technology is relatively new, but has already gained popularity among builders because of its simplicity and effectiveness.Concrete was impregnated by penetrating waterproofing surfaces on either side of the overlap, then the pores of concrete in the interaction with its components begins growth needles, preventing moisture penetration into the concrete column.

performance technology gravel-sand cushion

1. Substrate Preparation is leveling the ground under the future floor and removing from it the fertile layer containing organic impurities.This is usually done at the stage of preparation of the site for construction.
2. on prepared soil sprinkled with crushed stone fraction size of not more than 50 mm.Backfill produced throughout the floor.Tamped Gravel, aligned to eliminate large differences in elevation.Layer thickness - not less than 0.2 m, and in areas with groundwater close proximity -. not less than 0.5 m
   

   gravel compaction process

3. Perform filling coarse sand layer of 0.1-0.4m. The sand shed water and thoroughly tamped manual roller.
4. blanketed gravel and sand cushion layer of geotextile.Strips of geotextile glued with the help of a hair dryer building.Geotextile acts as shock absorber and protects the insulation and waterproofing against damage.
5. Over geotextile butt put foam insulation, for example, polystyrene or penoplex.Styrofoam is not recommended because of a low mechanical strength.
6. After performing these operations, you can perform the waterproofing roll materials prepared by the base or immediately proceed to the floor screed.

technology waterproofing floor roll materials

1. perimeter wall stack damper tape.It is necessary to compensate for the expansion of the concrete screed under the influence of temperature fluctuations.Krepjat damper tape using an adhesive layer or a dowel-nails.
   

   The wall stack damper tape

2. Align as needed basis, overwriting potholes cement-sand mortar or sand them falling asleep.
3. when using plastic waterproofing plenokobrabotka concrete slabs do not need a primer.Optionally, you can treat concrete slabs with a solution for penetrating waterproofing.If you are using a conventional roofing material, the floor must be pre-treated with primer for bituminous mastics.
4. when using plastic waterproofing plenokobrabotka concrete slabs do not need a primer.Optionally, you can treat concrete slabs with a solution for penetrating waterproofing.If you are using a conventional roofing material, the floor must be pre-treated with primer for bituminous mastics.
5. roll waterproofing lay on the prepared floor strips, forming an overlap on the wall at least 15 cm bands also put overlapping width -.. At least 10 cm when using tar paper it is glued to the base using bituminous mastics, and glued joints, forming an overlap.
   

   process of laying roll waterproofing

6. facing materials, for example, stekloizol, fixed on the basis of using a gas burner.Polymer films are placed overlap and are welded together building a hairdryer.
   

   Laying surfaced materials

7. number waterproofing layer depends on the type of material: roofing material put in at least two layers, fusing films and polymer materials - in a single layer.After laying the roll of waterproofing can be carried out reinforcement and floor screed.After hardening of the screed and waterproofing protruding roll damping tape are cut flush with the floor.

perform sex waterproofing technology surface waterproofing

1. Prepared concrete base is cleaned of debris, dust and dirt, carefully necessary to remove sharp particles, cutting edges and projections, as well as patches of oil, solvents, chemically-active substances - the interactionwith surface waterproofing solutions they can destroy it.
   

   Prepared concrete surface is cleaned of dust and dirt

2. surface waterproofing is most often performed by a bitumen or bitumen-rubber mastic cold application.Before starting work the floor surface is recommended to treat primer - primer for the type of mastic.It is better to choose a primer of the same manufacturer.
3. primer is applied by brush in one layer, promazyvaya all areas.It reduces dusting surfaces and improves adhesion to it of mastic.Particular care should be handled joints with the wall and the space around the pipes.Drying time of the primer is typically less than two hours.
   

   process of applying the primer with a brush in one layer

4. Mastic applied with a wide brush or roller in several layers, each subsequent deal after the complete drying of the previous one.The layers are applied in a different direction of movement of the brush or roller.In joints of walls and around pipes mastic applied with a fine brush, carefully promazyvaya all areas.
   

   process of applying mastic

5. Complete drying surface waterproofing usually lasts about two days.After that, you can begin to implement the screed.When laying the reinforcement necessary to use plastic guides to avoid contact with metal construction surface waterproofing - with a load they can damage it.

not one but several methods can be used for reliable waterproofing the floor in front of the screed.For example, if the floor sealing in the private house without a basement can be made of sand-gravel cushion on top of it lay a layer of insulation, waterproof film, and then mount the valve and fill screed.The apartment on the first floor, located above the basement, you can use the penetrating waterproofing floor slabs in conjunction with the roll or surface waterproofing.In wet rooms apartments, located on the upper floors of an apartment building, where any leakage could result in damages to neighbors, it is better to arrange a dual waterproofing: before the tie, and on top of it.In this case, under the screed using roll materials, and on top of the screed perform surface waterproofing.