Those who build or repair their homes know about floods firsthand. Seasonal downpours, snowmelt and, as a result, floods on rivers are frequent in the Southern Federal District.
The Krasnodar Territory is one of the regions with a large area of flood-prone territories — about 4.5 thousand hectares. Residents of the region remember the disaster of 2012 in Krymsk, when 175 people died due to flooding. Last summer, three villages in the Absheron district and a number of territories of the Temryuk district were flooded. Traditional floods also occur in Krasnodar, especially in the Musical District. After the snowfalls of February 2021, the Kuban is also expected to have floods, when the fallen snow begins to melt in early March.
Portal of the South.ru collected cards about what material to choose for the insulation of the house, if it is located in a flooded area.
- Will the house stay warm after the flood?We do not consider the most tragic outcome — a partial or complete collapse of the building. But many minor flooding of the foundation can lead to such long-lasting problems as dampness, fungus and mold.And even palaces are not immune from it. Today, all buildings are built with the insulation of the foundation and walls, this allows you to save on the thickness of building materials and heating. But not every insulation will safely endure the impact of the water element.
- How are the walls most often insulated?Today, there are many insulation materials on the market, but the most common materials are based on mineral wool or foamed polystyrene. From the second group, the optimal is extrusion, or extruded, expanded polystyrene, which is also designated by the Russian abbreviation EPPS or the English XPS.Mineral wool is often chosen because of its low price and relatively low thermal conductivity — these are its main advantages. But using it in homes at risk of flooding is at least short-sighted.
- Which material is more afraid of water?The answer is obvious — mineral wool. It has a fibrous structure, and the space between the fibers is quickly filled with water. The structure of EPPS is different — it consists of small closed cells filled with air, so water penetrates inside only if there is mechanical damage. That is, in the case of flooding, the water absorption of EPPS is close to zero: the material does not absorb moisture due to the isolation of the cells, unlike soft and easily wet mineral wool fibers.
- What happens to mineral wool after flooding?1. It loses its heat-protective functions. With immersion in water, its thermal conductivity (the opposite of heat preservation) can increase tenfold, since water, which has replaced the air between the fibers, has much greater thermal conductivity than air.2. The fibrous structure also leads to the fact that mineral wool settles over time and loses its uniformity — builders call this “cold bridges”. After a flood, the wet fibrous material shrinks even faster.
3.Mold — where without it. In wet cotton wool, a fungus and pathogenic bacteria will eventually appear. After all, any life is born in the water, including undesirable for humans.
4. In the house that survived the flood, the walls of which were insulated with mineral wool, it will become much colder. Heating costs will increase significantly. It will be cheaper to perform major repairs of structures that have been insulated with mineral wool, with its complete replacement.
- And what about the water in styrofoam?1. If the EPPS is not damaged and its integrity is not violated, then it will not lose its heat-protective properties under the influence of water. Building structures insulated with EPPS will store heat in the same way as before the flood.2. Due to the uniform structure, the material does not settle in either dry or wet environments.
3. Since EPPS does not absorb water, it will not serve as a breeding ground for bacteria.
4. As a result, the foundation and walls insulated with extruded polystyrene foam do not require repair after a flood.
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