Waterproofing foundation from inside

As a construction foundation they usually use monolithic ferro-concrete structures that are simple in fabrication, reliable and relatively unexpensive. The concrete itself isn’t afraid of water, the problem is in its structure that becomes a reason of the fact that even a high-grade foundation acts like a sponge if you don’t take special measures.

In what cases it is possible to do without foundation waterproofing

You can completely give up on the foundation waterproofing from inside only when building non-domestic premises. And if there is no subterranean water, also during the raining or flood season. In all other cases foundation waterproofing is necessary, even when special, in other words “moisture-proof” concrete is used.

Main foundation waterproofing from inside types

Water proofing is divided according to the appropriation and to its conduction methods. According to the appropriation there are two types of water proofing:

  • horizontal;

From a constructional point of view the foundation waterproofing can be:

  • surface (roll);
  • membrane (liquid);
  • evaporable;
  • penetrating;
  • screen;


Is conducted with roll protective materials, the most famous of which is a roofing felt. Service durability and flexibility of the last one is not high enough, so present-day polyester-based compositional materials are used instead of it.

Membrane waterproofing

This concrete waterproofing type is relatively cheap, simple and quite effective where it is necessary to prevent subterranean water shallow and filamentous invasion. When conducting the work bitum mastic applying in several layers is used.


The evaporable waterproofing is used where the foundation form is very complicated or if in close vicinity to it there are constructions inhibiting work conduction. As the name implies, special evaporators that apply polymer waterproofing reagent are used for its setting up.


This is a foundation reinforced guard for special serious cases. Its surface is applied with aqueous solution based on cement-quartz compositional materials with active agents. The peculiarity of this method is that a strong enough layer is being formed on the monolith surface, that firmly protects the foundation from subterranean water aggressive action.


This water proofing is applied where the subterranean water pressure is so high that other waterproofing methods are ineffective. This method consists of the so called «cut-out lock» assembly from attached to each other special waterproofing quills.


In this case in the monolith mass bores are drilled out, through which a binding substance based on acrylate gels, silicates, polyurethane compositional materials, resins etc. are being injected.