Properties and methods of using a waterproofing membrane

When constructing buildings, waterproofing is used to protect the foundation, floor, roof, walls from the destructive effects of moisture. Previously, roofing material or a film was used as it. But now the industry produces special materials that create reliable insulation - waterproofing membranes.

The membrane, although similar in thickness, density and material to a vapor barrier film, has the main difference in principle of operation. Vapor barrier is used to protect the insulation from the internal humidity of the house. She does not pass steam and water.

Waterproofing not only protects against moisture, wind, but also allows steam to pass through. The moisture that has got into the insulation should go away. The membrane has a porous structure, and water passes through these micropores.

Basic properties

A waterproofing membrane is a polymeric material with the following qualities:

• Elasticity;
• Weather resistance;
• Strength;
• Resistance to temperature differences;
• Durability.

Membranes can be used for:

1. Roofing, foundation, walls, floor. The membrane protects the roof from wind and moisture, removes excess water from the insulation, while maintaining its performance. If necessary, the membrane itself can be temporarily used instead of slate or tile (but not more than 1.5 months). Membranes are also used for waterproofing the foundation, walls and concrete screed. Their properties are the same.
2. Basin. Here, the material adds strength to the structure and reliably protects against water leaks. Can carry a decorative function.
3. Basements, tunnels, underground structures. Apply where settlement of the structure is possible.

Types of membranes

Waterproofing membranes are divided into several types:

• Diffuse - in structure is more complicated than a simple film. Its pores, like microscopic funnels, remove moisture from the inside, but do not pass from the outside;
• Superdiffuse - the principle of operation is the same as that of diffuse. The main difference is the rate of moisture removal. The superdiffuse membrane removes water much faster, so ventilation gaps are not required;
• Anti-condensation - suitable for coatings that are sensitive to condensation on the inside (metal profile or metal tile). Through it, excess moisture does not come out. The back side of the membrane retains water with tiny villi. Water escapes through the ventilation gap.

How to choose

There are special membranes with a protective layer from ultraviolet radiation, which can temporarily replace the roof of the house. There is a waterproofing membrane with a self-adhesive tape at the base. It is much easier to mount. This can be used for waterproofing basements and foundations.

The membrane should be selected according to its main parameter - water resistance. The higher it is, the better the membrane will retain moisture. It is worth paying attention to the breaking load. The greater its value, the stronger and longer the material will serve. It is also important to properly install the waterproofing membrane.