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Thermal Insulation for Roofs

Thermal Insulation

A ready-mixed, cement-free flexible skimming base coat that is highly elastic and resistant to the biological attack of mold and algae.

Excellent for fixing deteriorated insulating systems and micro-cracked render and making reinforced skim coats on insulating panels and thermal insulation systems.
Common Types of Thermal Insulation Used on Roofs

Polyurethane Foam (PIR/PUR)

Polyurethane Foam, also known as PIR or PUR, is a type of insulation created through a chemical process combining rigid polyurethane foam with an isocyanurate catalyst. It is highly versatile and effective, making it ideal for all kinds of exposed roofs, particularly suited for adhered and ballasted roof systems.

Advantages of PIR/PUR

  • Fire Resistance: Exceptional, withstands temperatures over 250°C.
  • Thermal Conductivity: Extremely low, between 0.023 – 0.028 W/m·K, making it a very efficient insulator.
  • Compressive Strength: Ranges from 100 – 300 kPa, suitable even for some ballasted applications.
  • Weight: Lightweight, typically between 30 – 60 kg/m3, easing installation and structural load.

Stone Wool

Stone wool, also referred to as rock wool, is derived from basalt stone fibers. It is commonly used for exposed roofs that are mechanically fastened and require high levels of fire resistance.

Advantages of Stone Wool

  • Fire Resistance: Excellent, withstanding temperatures up to over 1000°C, classified as noncombustible.
  • Thermal Conductivity: Low, between 0.038 – 0.041 W/m·K.
  • Compressive Strength: Sufficient for exposed roofing, ranging from 40 – 80 kPa.
  • Weight: Heavier, between 100 – 200 kg/m3, which might influence structural considerations.

Expanded Polystyrene (EPS)

EPS is a lightweight and cost-effective thermal insulation board made from expanded polystyrene granules. It is popular for exposed and ballasted roofing systems due to its balance of performance and affordability.

Advantages of EPS

  • Fire Resistance: Generally self-extinguishing.
  • Thermal Conductivity: Moderately low, around 0.037 – 0.041 W/m·K.
  • Compressive Strength: Ranges from 100 – 250 kPa, making it adequate for various roofing needs.
  • Weight: Very light, between 20 – 40 kg/m3, which simplifies handling and installation.

Extruded Polystyrene (XPS)

XPS is produced from polystyrene through an extrusion process. Its unique properties make it particularly suitable for inverted ballasted roof systems and utility roof decks, as well as exposed roofing systems.

Advantages of XPS

  • Water Absorption: Almost zero, preventing moisture penetration and related issues.
  • Fire Resistance: Mostly self-extinguishing.
  • Thermal Conductivity: Very low, between 0.034 – 0.038 W/m·K, offering excellent insulation.
  • Compressive Strength: Extremely high, ranging from 250 – 700 kPa, which supports high-traffic roof decks.
High Elasticity

Thanks to the use of innovative resin;

High Impact Strength

Its elastic structure dissipates impact loads;

High Adhesion Strength

Adheres perfectly to insulating panels, old and new render, organic and cementitious skimming compounds, paint and coatings, including those that are deteriorated, as long as they are sound, well bonded to the substrate and do not suffer from rising dampness;


Thanks to the automatic colouring system.

Available in two grades with different particle sizes: 0.5 mm and 1.5 mm, for different requirements and uses.


It is ideal for reinforced levelling coats on walls and insulating panels, especially when work needs to be completed quickly; no primer or curing is required before applying the finishing product. Recommended for repair work on thermal insulation systems, as long as they are well bonded.


Used in combination with smooth textured finishing products for external applications, it is excellent for levelling micro-cracked and uneven walls in interiors. Where required, Color Net mesh may also be incorporated to form reinforced levelling coats to contain cracked areas, including widespread cracking.

Where to use
Repair Work

Apply a first coat

Place in position

Finishing coat with a sponge float

Finishing Coat

Apply a coat over 0.5 mm with a roller

Apply over 1.5 mm with a trowel

Thermal insulation

Even though protection for masonry buildings is still entrusted to the use of textured paint and coating products, thermal insulation systems are becoming increasingly widespread. Apart from offering protection from bad weather, they help contain energy losses, which are both costly and increase the level of CO2 emissions. This type of system, however, which has been adopted for several decades, needs to be maintained, and sometimes particular maintenance interventions are required. In the worst cases, the entire system may need to be removed entirely and replaced.

In the case of normal maintenance, or if the damage or deterioration has been identified in time, it is possible to carry out repairs using technologically suitable products, and if applied by skilled workers, the intervention will be reliable, durable and economically advantageous.

It is within this context that a new product with exclusive, versatile characteristics has been successfully used to carry out repair and maintenance work that is efficient and has an aesthetically pleasing finish.

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