SATE / Insulation

External thermal insulation system (SATE)

This type of system is used in construction to achieve the thermal (and acoustic) insulation required by the building from the outside. The SATE is used in the rehabilitation of facades and in new construction projects and provides buildings with greater energy efficiency.

From Nutersa we offer the industrialist solutions specially designed to provide the building with the desired thermal and acoustic insulation.

SATE insulation

In Nutersa, we are specialist distributors of the SATE system for the insulation of facades in the construction and rehabilitation of buildings. Our 20 years of experience allow us to offer to the industrialist integral building solutions, specially designed to provide thermal and acoustic insulation to all types of buildings.

What is the SATE (Exterior Thermal Insulation) system and how is it installed?

The SATE system (Exterior Thermal Insulation System) is mainly used for the thermal and acoustic insulation of the facades of a building. It is a system widely used in both new construction and building renovation.
It has several benefits for the home, such as: a great energy saving, a great improvement in thermal and acoustic comfort and a wide range of decorative finishes. Its installation consists of placing an insulating material adhered to the wall, usually by mixed fixing by means of adhesive and mechanical fixing, serving as a support for the final finish: acrylic or mineral mortar with a wide range of colors or cladding.

What are the advantages of insulating on the outside?

Insulating the exterior of a building's façade with the SATE insulation system has many advantages:

  • Home energy savings
  • Significant reduction or minimization of thermal bridges
  • Increased thermal comfort of the home
  • Reduced risk of fungal growth, condensation and mold damaging the building's façade
  • Helps improve façade maintenance
  • Fast and economical installation
  • Respect for the environment
  • Increased thermal and acoustic insulation

Installation phases of the SATE

The installation process of the SATE system consists of five stages: first the facade support is prepared, then the starting profiles are placed, the insulating boards are installed (EPS, EPS-G, XPS, rock wool,...), after fixing them, the regularization and screed layer is applied and finally the chosen finish is applied: acrylic or mineral mortar or cladding.

The surface of the facade and the height of the building, due to the assembly of auxiliary elements such as scaffolding, are some of the elements that influence the time it takes to install the SATE, although they are usually fast works.

Building preparation. Supports

We will pay special attention to the cohesion, stability, planimetry, resistance and cleanliness of the facade where the SATE thermal insulation system is to be installed. In order to achieve maximum adherence of the facade, any imperfections it may have should be corrected.

Brick, stone, concrete or existing plaster are the different supports where the installation of a thermal insulation SATE can be carried out. For this reason, we carry out an exhaustive analysis of which will be the most suitable system depending on the typology of the building and the existing support.

Start-up profiles

It is recommended to place the starting profile at the lower limit of the area to be covered, anchoring it to the substrate by means of screws, spacers and connectors, with a 3 mm spacing between them, facilitating the starting of the insulation assembly and guaranteeing its horizontality. It includes a dripper that guarantees the vertical drainage of the water avoiding its return.

Installation of insulation boards

There is a wide variety of insulating panels approved for the SATE system. We find from EPS in white or with graphite particles (EPS-G), extruded polystyrene XPS panels and rock wool. In addition to the most ecological ones made of cork or wood chips.

Adhesive material will be applied to the panel in sticks and placed by pressure against the substrate, starting from the starting profile already in place, with a joint breaker. Subsequently, after the adhesive has dried, mechanical fastening is carried out by means of PVC dowels with circular heads.

To ensure a perfect meeting of the plates at the singular points, the use of a hot wire cutting table is recommended.

Mortar application

In this phase, the SATE accessories are installed. This consists of a wide range of solutions such as edge protection with mesh for the edges, drips for lintels, profiles for sales frames or expansion joints, among others, all of which are fastened with a thin film of SATE adhesive mortar. Then another layer of adhesive mortar is applied to the entire surface of the insulation of between 1 and 2 mm. thick to place by pressure the approved mesh for SATE of 160 gr/m2.

Once this layer is dry, a second layer of adhesive mortar will be applied to achieve the 4 mm. thickness approved by the system and regularize the surface for the subsequent placement of the chosen finish. The surface will be worked in fresh to trowel it and leave it homogeneous.

Placement of the decorative finish

To finish the process, the chosen decorative finish will be applied. There is a wide range of possibilities, although the most common is the finish with acrylic or colored mineral mortar, with textures differentiated according to granulometry and with an extensive catalog of colors. A layer of primer is applied as a bonding bridge and the surface is then troweled.

Other finishing options, ranging from fine lime-based stuccos to ceramic tile cladding adhered with highly flexible cementitious adhesives, provide the SATE system with great versatility.

Influence of the SATE on energy efficiency

The facade of a house withstands all weather conditions throughout the year. In winter, heat is lost from the interior of homes, while in summer fresh air is lost. Consequently, a greater effort is made in air conditioning, increasing energy costs.

To balance these losses, minimizing them, and increase both their energy efficiency and insulation capacity, the SATE system is used in facade rehabilitation and in new construction projects. In relation to new construction, in 2019 the new Technical Building Code (CTE) came into force, increasing energy efficiency levels.
In this aspect, the SATE system is the perfect type of insulation to meet all the requirements of the CTE since the type of insulating panel can be adapted, as well as its thickness according to the thermal transmittance of the project and it also offers great possibilities of decorative finishes.

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