Waterproofing of the basement : the materials , the description of the action

In what cases need waterproofing the basement?

In general, any foundation needs extra protection from underground (groundwater) and surface waters .That is why the specially created blind area.The issue is that in some cases require additional waterproofing.Below we will look at it when it needs to be done.

• In cases where the distance from the base to the bottom of groundwater than 1 meter.

While this value is specified with a show of spring water (as it is known, due to melting snow raised by 1-2 meters in this period, groundwater).

• When the groundwater level above the bottom level of the basement.

addition, do not only waterproofing and drainage.It is designed for water drainage.If not make drainage, the hydrostatic pressure will be created, which reduces the strength of the foundation support.That is why all kinds of shifts can occur and even tipping over.

• When building a house on impermeable soil (loam or clay).

That there is often a layer of water.It is proved by the fact that this does not penetrate the surface sediments in downstream layers.

• is believed that if the water table is less than one meter from the bottom of the foundation, it is possible not to carry out waterproofing.

But it is worth considering the fact that the increase in water level can be not only seasonal, but year-round, for example, due to the increasing density of buildings, paving, drainage arrangement in the neighboring areas.Therefore, in this case can be made inexpensive surface waterproofing of the foundation.

Waterproofing Materials for the foundation: types

Depending on the type of foundation and the existing conditions selected different type of materials for insulation.Let us consider in detail each of them.

• of coating materials , such as mastic asphalt MBI, BKM, IDB, MBC, MBU, as well as compositions based on rubber (synthetic resin).

Protect them most of capillary rise, but not water under pressure.The main disadvantage - low ductility and low mechanical strength.This isolation can withstand loads are shifted, often it gives all sorts of leaks and leads to the formation of cracks, which can be got microorganisms.Protect it can be further insulation, geotextiles, presser brick wall.Apply sealant to waterproof the foundation on a level, the dried surface.

• Roller (Wood banding) materials - roofing, gidrostekloizol, flashing, stekloizol, stekloelast Izol, rubiteks.

They provide high resistance to deformation.This is more expensive, but more durable in comparison with lubricative means.Apply it over the mastic for roofing material.

• sprayed waterproofing , which is easily and quickly applied with a special spray.

The advantage of this method is that the surface does not need to be further processed only remove dust.Apply it is usually for the foundations of complex shape, when it is difficult to paste over a typical web material.

What materials should not be used?

can not be used for insulation of the basement and basement windproof, membrane and Roofing films. is substantiated by the fact that they are very thin and do not stretch.It is therefore easily torn.Plus, they will not withstand the friction of the surface of the ground in the soil shifts.And, of course, easily burst under the pressure of groundwater.

also not necessary to use materials with UV stabilization. These include PVC membrane.After all, its main function - is the protection from ultraviolet radiation, which is under the ground simply do not need.Yes, and such membranes are much more expensive.It turns overpayment for the material that is not appropriate and beneficial.