Technology: Heat insulation of facades

Technology: HEAT INSULATION OF FACADES


Uses of the heat insulation system

  • Complex systems for heat and sound insulation of building facades.
  • Protection of building structures from the effects of precipitation.
  • Heat saving during the heating season.
  • Energy saving in summer period.
  • Prevention of mold growth inside the structure.
  • Restoration of damaged facades.

System elements

scheme heat insulation of facades


  1. Wall
  2. Adhesive solution ZM-01

    The solution is designed for the installation of heat insulation plates made from expanded polystyrene to outer walls (facade) of buildings. The solution is applicable to all existing construction substrates

  3. Heat insulation system tiles made from expanded polystyrene

    As an insulation material the expanded polystyrene EPS 70 is used. Its main task is the heat insulation of external and internal walls. The maximum permitted heat insulation in the system is 200mm. Expanded polystyrene is composed of a flame retardant material to prevent combustion. Maximum flammability class D1.

    Brand EPS 70
    Density, kg/m3 13,5
    Thermal conductivity, W/(mK) 0,039
    Compressive strength, kPa 60
    Tensile strength, kPa 100
    Ultimate flexural strength, kPa 100
    Water absorption per volume in 24h, % 2
    Afterflame time, s 2
    Flammability class D1
  4. ZM-02 adhesive solution reinforcing

    The adhesive solution is designed to make a coating reinforced by facade netting. The coating forms a protection from mechanical damage and is used for the subsequent finishing of the wall. The adhesive reinforcing coating consists of an adhesive solution and netting that is sunk into the solution.

  5. Reinforcing netting

    The glass fiber reinforcing netting is recommended for the reinforcement of plastering and spackling coatings on the interior and exterior surfaces of buildings and structures of various purposes.

  6. Acrylic primer

    The priming mixture increases the adhesion to the decorative coating. Partially prevents the penetration of moisture into the insulated coating. The primer is white in colour. In the case of using coarse plaster, the priming coating should be painted.

  7. Decorative priming coating

There are several types of plasters.

Acrylic plaster
Produced based on acrylic resins. It is a ready-to-use water-dispersion composition. May be applied on old dispersion surfaces and mineral substrates. Coloured in the selected color or painted with acrylic paints. The main advantage is the resistance to climate. No need for repair for 15-20 years, however has a low rate of vapor permeability.

Important notice: Due to the low vapor permeability is not allowed to use on plaster facade systems that are based on mineral wool.

Silicate plaster
Produced based on liquid potash glass. It is a ready-to-use mixture. Suitable for use on prepared mineral substrates and over old silicate surfaces. The downside is the need to be used together with a silicate primer, as well as the small variety of colors. Partial discoloration during heavy slanting rain is also possible. However, after drying the colour of the coating becomes of the same colour as before.

Silicone plaster
Produced based on silicone resins. It is a ready-to-use composition. It is used on all types of mineral substrates and on old dispersion surfaces. Coloured in the selected color or painted with acrylic paints.

Mineral decorative plaster
Contains water-repellent additives in the form of a dry mixture. After dilution with water forms a homogeneous plaster solution.

Mounting of the heat insulation system

Preliminary works

Before the start of installation works it is necessary to remove dirt, dust, and various roughnesses. Roughnesses of the substrate must not exceed 1 cm x 2m. The facade of the building must be checked for the presence of voids under the plaster coating. Upon detection of voids the old coating is required to be dismantled or repaired.

Preliminary works. Heat insulation of facades
Substrate processing

The surface must be primed with a roller or painting brush to ensure adhesion with the adhesive solution. Deep-penetrating primer fills the cracks and partially prevents the penetration of moisture into the insulated coating.

Substrate processing
Adhesive for expanded polystyrene plates

The adhesive is applied to the plates with a notched trowel on the perimeter with a strip of 30-50 mm, thickness of 10 mm with a deviation from the edge by 20 mm, 6-8 strokes with a diameter of 150 mm and a thickness of about 10 mm are placed in the center of the plates. The adhesive solution should be at least 40% per cent of the area of the plate. After applying the solution it is necessary to glue the plates within 10 minutes.

Important notice: The adhesive solution should not get into the seams between the plates.

Adhesive for expanded polystyrene plates
Expanded polystyrene foam

Expanded polystyrene blocks are installed upwards in such a way that the subsequent seam falls into the center of the plate forming T-shaped joints. It is recommended to install whole pieces of plates to the corner ledges of the building, as well as window openings, remove the remains with a hacksaw. After complete drying of the adhesive solution, the plates must be secured with disk-shaped dowels.

Important notice: All corner pieces are to be additionally armoured with an angle bar with reinforcing netting.
Expanded polystyrene foam
Reinforcing surface

With a notched trowel apply the reinforcing solution onto the surface of expanded polystyrene plates, without waiting for the surface crusting, sink the solution into the reinforcing netting for 10mm using a smooth trowel. After drying, treat the surface with the priming mixture, when necessary, add a colorant to the colour of the decorative plaster to avoid the appearance of white specs in the “rustic-textured” decorative coating.

Important notice: Before applying protective decorative plaster the surface should dry completely.

Reinforcing surface
Decorative finishing coating

The decorative plaster is applied with a spatula in circular motions by 1 square meter at a time, after the application of the whole decorative coating, use a grater to level the surface and remove excesses.

There are many different techniques for applying a decorative coating, the method of applying the “vermiculation“ is explained above.

Important notice: The decorative finishing coating dries within 15 minutes.

Decorative finishing coating