Brick plinth for strip foundation

Brick plinth for strip foundation Installation of a brick basement on a strip foundation

Operation characteristics of strip foundations much better than all other alternative support structures for structures and buildings. The tape makes it possible to create basements or a basement floor, something is completely excluded, or is significantly hampered on other types of bases.

At the same time, a feature of the material that is used to create a brick base on a strip foundation is its instability to indirect or direct contact with water. If the first problem can be easily dealt with by means of waterproofing, then it is much more difficult to deal with the settling of air moisture on cool brick or concrete.

We suggest you consider the most effective method of solving the issue - insulation of the tape-type base.

Is it required to insulate the strip base?

The importance of insulation is actively discussed by all interested people - owners of country houses, builders and summer cottages. Here are the reasons for tape insulation:

  1. Cutting the tape from contact with cool soil layers or frosty air reduces the temperature difference between the brick and the internal humid air.
  2. An increase in the temperature of the tape greatly changes the ratio of the degree of heating of the air and the surface of the concrete, which reduces the intensity of condensation.
  3. Reduces the impact of surrounding cool soil layers on areas located directly below the house, which reduces the risk of frost-type heaving loads.
  4. Reduces the level of deformation of house structures, which are caused by temperature differences between individual elements and areas.

The opponents of insulation have the following arguments:

  1. The efficiency of mounting a thermal insulator on a massive concrete strip is relatively low and cannot fully solve the problem.
  2. The procedure is quite laborious and expensive.
  3. Insulation will not eliminate the need to create high-quality ventilation in the basement, which can itself solve the problem of condensation.

Both the first and the second are based on statistical data and personal experience of using strip foundations. There is still a consensus of tapes, although there are still more supporters of insulation.

The reason for this is an improvement in the quality of thermal insulators and a better understanding of the essence of the physical processes that take place in the area of ​​the strip base and surrounding elements.


Key questions

When is insulation needed

Thermal insulation of the base is necessary if the surrounding soil has a tendency to heave in winter. This is the main condition and reason for the implementation of activities.Moreover, the installation of a thermal insulator makes it possible to exclude heat losses through the tape material, which reduces the cost of heating the entire house and basement. When combined with a high-quality supply and exhaust ventilation system in the basement, insulation makes it possible to remove the exhaust humid air, solving the problem of moisture condensation on cool strip surfaces and ceiling tiles.

Please note that the tape must be insulated both outside and inside the premises. Applying the technique separately, either internally or externally, will not bring the expected effect and will turn out to be a waste of money.

To what depth

Brick plinth for strip foundation Tape insulation is carried out throughout areas, including areas immersed in the ground, and those that are on the day surface. To do this, you need to remove the earth to the entire depth of the trench (if you are insulating the operating base), or to mount the insulator directly in the construction process of the foundation (ideal).

Partial insulation of some areas, only the upper tape part, or other options for incomplete cut-off from the influence of cold will not give a beneficial result.

On the contrary, at the border of open and insulated tape sections, the process of moisture condensation is activated, and the level of thermal expansion of the tape also increases, which gives preconditions for the appearance of microscopic cracks that absorb water into concrete with further destruction.

The problem is solved only by 100% hermetic installation of insulation on the entire working surface of the base.

Basic installation methods

The installation of a brick basement on a strip foundation is quite important, and first of all, you need to divide the procedure into two main parts:

  • External insulation - installation of a thermal insulator is performed on the outer tape part. The process will require direct access to the surface of the foundation, and therefore the best option would be to insulate it immediately after construction.
  • Internal insulation - installation of a thermal insulator from the basement side.

    It can be performed both during construction and later, although it is recommended to carry out all work as early as possible. This makes it possible to exclude the accumulation of moisture in the material, which is absorbed when the condensate settles on the surface.

Moreover, there are different installation technologies of thermal insulators, which are due to the characteristics and parameters of each of them. according to the installation method, there are such thermal insulators:

  • Sprayed.
  • Backfill.

  • Okay.

The choice of the most successful option is determined by the owner's capabilities, budget, as well as the operating conditions of the tape. One of the most important material requirements is the thickness that provides the best insulation effect. Moreover, it is important to take into account the material's resistance to moisture.The use of thermal insulators, which tend to absorb and absorb moisture, is excluded, because together with thermal savings, they will contribute to wetting and tape destruction.

Technologies and materials

Different materials are used to insulate the tape-type base. They have different properties, installation methods, and also have their own pros and cons. Let's consider them in more detail.


The name "styrofoam" has stuck since the moment the material appeared on the market. It, like the word "Xerox", designates the first manufacturer of the material.

The real name is granular polystyrene foam. Insulation, which is excellently leading among the alternative options due to the optimal ratio of cost and quality. it is made in the form of plates with a given thickness and dimensions, which have sufficient rigidity and extremely low weight. It can be easily processed, it is practically resistant to the influence of water (there is little absorption in the small cavities between the granules). It has high thermal saving capabilities.

Installation is carried out by means of adhesives on the tape surface. Installation must be completely sealed, and the resulting gaps must be filled with polyurethane foam. Polyfoam is quite fragile, it can begin to crumble, and therefore it is required to work with it carefully, carefully.

Expanded polystyrene (extruded)

This material is the closest "relative" of foam, but, unlike it, they do not from granules, which are combined under the influence of superheated steam, and by foaming a polystyrene melt. Due to a more advanced technology, a durable and completely invulnerable to liquids material appears, which has an optimal set of qualities for operation.

The installation method is identical to the foam installation technique, the reliability and durability of the extruded polystyrene foam are quite high. Penoplex is a popular type of material in retail chains. The only but tangible disadvantage of the material is its cost, and it is much higher than that of foam.

Liquid polyurethane foam

To insulate a brick base on a strip foundation, a heat insulator is needed, which resembles assembly foam. It is a liquid that you spray onto the treatment surface.

In air, it begins to foam, increases in volume, which results in an airtight and dense fabric. The layer of material has excellent heat-saving properties, ideal resistance to water and air tightness. The special quality of the material is the ability to apply on a surface with a complex configuration, with a large number of protruding elements. The downside is the high cost and the need for special equipment in order to apply the material to the tape surface.

Expanded clay

The material is a free-flowing thermal insulator, used mainly to insulate horizontal surfaces.

The main advantage is durability and the ability to use it repeatedly - if necessary, they take it out, carry out work and again fall asleep in place (or use it for other purposes). The use of expanded clay for insulation of the tape-type base is reduced to filling the sinuses of the trench, which will not give the desired effect. Moisture in the soil has the ability to freely penetrate into the material, which can keep it on the surface of the finishing granules for a long time. This moment is the main factor that limits the use of expanded clay for insulation of the tape-type foundation. In the last couple of years, a special type of foam for underground installation has appeared on the market, which is needed to insulate the surface of the base of buildings or houses.

It has the most successful set of qualities and ensures the effectiveness of tape insulation.

Features of the work performed

The shallow foundation of the strip type rests on the layers of the earth, which can freeze through in winter. This creates the risk of heaving loads appearing, which can deform the support structure, or even destroy it. Under the house there is a section of heated land, which makes it possible to reduce the intensity of the heaving load.

In order to obtain greater efficiency of tape insulation, insulation of the blind area is used.

A layer of thermal insulator is laid under it with a slope section to the drainage pipes, which are located along the house perimeter at a certain depth. It needs to be poured over a thermal insulator, which creates a protective shield that cuts off moisture and cold from the side bands. As a result, the temperature of the earth layers adjacent to the base increases, and the heaving loads are greatly reduced.

Major mistakes

Brick plinth for strip foundation The main mistake that a part makes during warming bases - loose installation of the insulator, as a result of which cold bridges appear.

They begin to actively form condensation, become overgrown with ice or frost.

It is impossible to correct the situation without getting the soil out of the trench, and therefore it is necessary to carefully monitor the tightness and tightness of the insulator installation. The second popular mistake is to install the material only inside or outside.

This will not give the desired effect, since both layers each work in their own mode. They will complement each other and make it possible to obtain the expected result only with joint editing.


Warming is a controversial and complex procedure that will depend on the geological and climatic conditions of the region.

The benefits of it are obvious only if there is a certain combination of external factors that are not always clear to home owners or builders.If there are doubts about the need for insulation, it is important to contact people who have been using strip foundation for a long time and get information from them about the state of the foundation in the cold season. This helps to draw conclusions about whether insulation is needed and make the right decision.