Surface waterproofing the basement

surface waterproofing the foundation is used in cases when it is required by capillary moisture protection, and the hydrostatic pressure does not exceed 0.1 MPa.Execute surface waterproofing using asphalt or polymer cements, forming a waterproof film on the surface of the foundation.As the main protection obmazochnuyu technology is used for vertical waterproofing of the foundation.When the horizontal obmazochnye waterproofing material used as an additional moisture barrier, since their strength is low.

Materials for surface waterproofing

The most common materials are asphalt, bitumen-polymer, rubber mastic as well as primers for the preparation of grounds, varnishes, inks and water-based emulsion.Assignment component mastics:

• Bitumen - petroleum, allowing to create a water-repellent coating, black color, with low plasticity.It is used in dispersed form in the emulsion composition in the molten or in solutions of organic solvents.
• Rubber - liquid rubber.Gives Mastic plasticity, good adhesion, resistance to cracking during shrinkage of the building.
• Polymeric fillers improve adhesion and penetration, saturate the pores of the material.Contribute to increase mechanical resistance.
• solvents.They may be organic, for example, mineral spirits, and water.Tools for surface waterproofing, water-based is used as a primary waterproofing membrane films.

mastics for surface waterproofing are as cold, ready-to-use, and hot - they are available in blocks as a viscous solid mass and require preheating to a temperature of 160-180 degrees Celsius.

technology performance surface waterproofing

1. foundation surface is cleaned from dust and dirt.Sharp projections, corners and edges must be rounded to a radius of at least 3 cm using the grinder, or by mechanical pressure of the soil or structures will damage the waterproofing layer.If the coating to be inside corners, you need to fillet a triangular cross-section - with their help decrease the pressure of the backfill on the waterproofing layer.Cracks and seams embroider to a solid base, sealed with cement mortar.Sinks also obscure the grout - by coating the air remains in them, and after a while formed bubbles at break which disturbed the continuous moisture barrier.
   

   Step 1 - Preparation of the surface of the foundation

2. To improve the adhesion of waterproofing film with a base used so-called primers - primers designed for a specific type of coverage.For bituminous mastics organic solvent-based primers are used with the same kind of solvent to water-based formulations - soluble primer.Primer is applied to the dust-free base with a roller, brush coat with additional angles.Drying time of the primer is typically less than a few hours.
   

   Step 2 - The process of applying the primer

3. Under the bitumen and bitumen-polymer mastic is applied to the first layer of fast-drying bitumen varnish, ensuring good adhesion.The varnish is applied with a brush, with vertical strokes, or sprayed on the entire surface of the foundation.Wait for complete drying it.
   

   Step 4 - the process of applying quick-drying varnish bitumen on the foundation

4. Prepare a paste for application.Monocomponent stirred and diluted with an appropriate solvent if necessary.Mastic mixed for instructions on the package.
   

   Step 5 - the process of mixing the mastic

5. Apply the first layer of mastic with a wide brush, roller or spatula.Mastic is applied without gaps, carefully promazyvaya angles to form a whole and for seamless coverage.vertical - direction strokes.Similarly, applied two or three layers of mastic, always waiting for the full time of her cure.When working at subzero temperatures under mastic be heated slightly to improve its ductility.
   

   Applying the first layer of mastic on the foundation

6. In the case of construction of new buildings must be reinforced waterproofing, to avoid damage to its shrinkage.For this purpose, fiberglass, fiberglass, pasting them on the first layer of mastic, so that they were completely wet it.Also be sure to reinforce fiberglass corners, fillets, cusps beveled.
   

   protection of waterproofing materials

7. bituminous mastics for hot application must first be heated to a temperature of 160-180 degrees in a metal container.Apply it with a spatula, stiff brush lining.The hot bitumen mastic is usually applied to the horizontal waterproofing the basement, where you want a thicker layer, and rapid hardening of bitumen layer.
   

   To prepare the bitumen mastic it is necessary to kindle the fire

8. After drying putty proceed to the basement insulation or produce Backward filling of soil.To backfill sand should be used without foreign inclusions - they may damage the waterproofing layer.To reduce the stagnant water at the walls of the basement and reduce the hydrostatic pressure in areas with high groundwater levels perform drainage before backfilling.

surface waterproofing is also used as an additional protection for the basement and sub-layer lining hydraulic seals.In this case, the surface preparation of the foundation is carried out in a similar manner, including rounding of sharp corners and performing chamfering, fillets device and a primer or lacquer coating and the first layer of mastic.Next, you lining hydraulic seals.

mastic and primer for additional protection is selected depending on the web material: for roofing material bitumen coating - mastic Bitumen, Polymer - water soluble mastic rubber-based and the dispersed oil as bitumen with respect to polymeric coatings isaggressive material and can cause their destruction.You also can not use mastic asphalt-based organic solvents such as unprotected before waterproofing insulation foam and polystyrene foundation.It is better to choose water-emulsion composition based on polymers or cement coat waterproofing primer.

surface waterproofing cement modified solutions

Variety surface waterproofing - Waterproofing of cement modified solutions.As is well known, concrete - a porous material easily absorbs moisture.The use of a solution with a high content of higher grade cement and modifiers, filling the pores and capillaries, allows you to make concrete is not only waterproof, but also chemically resistant to aggressive liquids.In addition, the surface of the material becomes very strong.These qualities of coating cement waterproofing due to its scope - the foundations of buildings, installed in areas with high humidity and the possibility of contact with aggressive groundwater.In addition, a layer of surface waterproofing cement-based plaster acts under any topcoat: tiles, decorative stone, painting.