What should be the right facade insulation?

17 August 2020

What should be the right facade insulation?

Preparation of the application surface before facade thermal insulation
Before starting the thermal insulation of the facade surface, the mechanical strength and compatibility of the application area should be checked. In new buildings, the wall surface should be washed with pressurized water, and in old buildings, dirt, oil, cement residues, and dust stuck to the surface should be cleaned.

Bumps and cracks on the wall in old buildings should be repaired.

In order to insulate the facade, the air temperature should be above +5oC and below +30oC.

Facade profile installation
Facade profiles are applied at a height of 30 cm from the ground to protect the facade insulation from external impact and humidity from the basement.

The size of the profiles is determined according to the system structure and the thickness of the thermal insulation material that will be needed for the building.

Facade profiles should be fixed with fixing elements suitable for the application surface and fixed by cutting the end parts at a 45o angle at the corner joints. At the same time, they should be fastened together, leaving a distance of at least 1 mm between the corners.


Bonding of thermal insulation material
On smooth surfaces, the thermal insulation material is attached horizontally to the facade with cement over the facade profile.

The heat insulation material should be arranged without any gaps between them. This rule should also be applied to corner sections. When laying the thermal insulation material, care should be taken that cement does not leak between the material and the smoothness of the surface should be constantly checked during application.

Fastening of heat insulating material with dowels
The doweling process should start 24 hours after the thermal insulation material is attached. The type and length of the mechanical dowel to be used in the system should be determined according to the applied surface structure, the thickness of the thermal insulation material and the mechanical load criteria that may occur on the facade.

A hole is made in the insulating material with the body of the dowel and the drill head, and the meter head should be opened by selecting a counter opening device suitable for the dowel heads. Dowels should be placed and applied to these headers, and the gaps left around the header should be covered with plaster to create a smooth surface. 5 dowels are used for each thermal insulation pile.

Application of edge and corner profiles
The edges and corners of the building facade, as well as the edges and corners of the door and window sections, are the parts of the facade that are subject to the highest mechanical stress and the risk of cracking is greater. Aluminum or PVC profiles should be used in the building to create a smooth and durable look in these parts.

Application of facade insulation mesh and plaster to facade thermal insulation material
Plaster is applied to the facade at least 24 hours after gluing the insulation material, and the facade insulation mesh should be placed from bottom to top without waiting for the cement to dry.

To prevent cracks that may appear on the surface, 2 mm plaster should be applied in each layer and the total thickness should not exceed 4 mm. Other reinforcing profiles should be used for sensitive areas such as windows and door corners on the facade.

Application of paint or decorative plaster
Before applying paint or decorative plaster, a primer should be applied to balance the absorbency of the surface and increase the adhesion between the coating and the surface. The mentioned process should be carried out after the primer applications are completely dry (after about 6-7 days). Decorative plaster is applied with a steel or plastic trowel, and at the final stage, a texture is created on the surface using another trowel according to the coating material used.

After the decorative plaster has dried, exterior paint (can be changed according to desire and taste) is applied, and the system is completed.