Isolmant Radiante

Isolmant Radiante

Isolmant Radiante

Isolmant Radiante

High performance resilient layer made of 5 mm Isolmant polyethylene joined on the upper side to a radiant tear-proof, embossed and aluminate film and on the underside to FIBTEC XF1 (special needle-worked fibre produced according to specifications designed to provide a better noise reduction). It provides excellent impact sound and airborne insulation for horizontal partitions. Install Isolmant Radiante with the fibre side facing down.


Thickness 8 mm.



Isolmant Radiante is specific for floating screeds as provided by UNI 11516:2013 standards with any type of slab. This product is specific for applications with hot/cold water underfloor heating. (A resilient underlay is always required since thermal panels do not provide impact sound insulation).


Specific for horizontal structures with finishing screed at least 5 cm thick.

Immagine 1


• Excellent acoustic impact sound and airborne insulation.

• Suitable for use in both renovation and new construction.

• Featured by a radiant tear-proof film.

• Low thermal conductivity.

• Unalterable over time.

• Unlimited durability.

• Contact with water does not affect performance or characteristics.

• Impervious to mould or insects.

Isolmant GreenPlanet

  • • Volatile Organic Compounds free(VOC A+).

  • • Eco-friendly and recyclable.

  • • Manufactured with low environmental impact.

  • • Contributes to achieve credits for the environmental certification of a building according to LEED or ITACA standards.

  • • This product can be disposed of according to EWC n. 170604.

  • • Complies with the requirements defined by the Italian CAM Edilizia for acoustic and thermal insulation materials regarding the request for high acoustic insulation performance, the percentage of recycled material and the absence of hazardous substances.

Item Specifications

The resilient layer made of physically reticulated expanded closed-cell polyethylene, joined on the upper side with an embossed aluminate radiant tear-proof film and on the lower side with a special needle-worked fibre that is conceived to enhance the acoustic performance (type Isolmant Radiante). To be installed with the aluminate-coated side facing upwards. Product with overlaps.

Nominal thickness 8 mm.

Dynamic stiffness 15 MN/m3.

Item Specifications Copy item specification

Installation information

1/2 - Installation of Isolmant Radiante

Isolmant Radiante is specifically designed to be installed under the panels for hot/cold water underfloor heating and on top of a systems levelling screed.


These sheets must be accurately joined by using their overlapping fabric and sealed with Isolmant Nastro Alluminio. It is also necessary to be careful to start flush with the wall with the polyethylene, avoiding leaving visible strips of fibre near the walls: the fibre, in fact, absorbs the cement and stiffens, generating a dangerous and continuous acoustic bridge.

1/2 - Installation of Isolmant Radiante
Product with overlaps for easy installation.

2/2 - Installation of Fascia Perimetrale:

To avoid acoustic bridges, the use of Isolmant Fascia Perimetrale Tecnica Radiante is recommended. This product should be installed along the entire perimeter of the room without interruption. In particular, in systems with underfloor heating or cooling, the use of Isolmant Fascia Perimetrale Radiante is recommended, which will be fixed to the wall using a medium-strength tape by making this tape adhere properly to the insulating underlay (the adhesive side of this strip should be positioned downwards) and by spreading the transparent film so that it is stapled under the first passage of the pipe.


The height of the strip must be such as to ensure that it exceeds the floor level by approximately 2/3 cm. This excess must be trimmed after laying the floor.

2/2 - Installation of Fascia Perimetrale:
The excess of the flanking strip must be trimmed only after the flooring has been laid and grouted.