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Tecsound 50 – Floor Soundproofing Membrane

Tecsound 50 – Floor Soundproofing Membrane

Tecsound 50 acoustic membrane is a thin (2.5mm), high density, visco elastic, polymer-based, asphalt-free, synthetic soundproofing layer, that offers excellent airborne sound insulation in different building elements. It has a reinforcing scrim on one side to improve the tear strength of the membrane and at the same time provide a protective finish. Tecsound 50 weighs 5kg per m² at only 2.5mm thickness. It is also available in a 10kg per m² version and with a self adhesive backing.  Tecsound 100 can be used on walls and floors. 

On floors, due to it’s thickness of only 2.5mm – it can be laid on top of the sub floor to add additional soundproofing mass and then the floor finish is placed top. An even more effective method of using Tecsound 50 is to sandwich it between two layers of OSB or Plywood. In doing that the visco elastic properties of Tecsound are brought to the fore and further improve the airborne sound insulation of the floor. 


  • High acoustic insulation, combined with soft, flexible elements
  • Tecsound 50 weight – 5.0kg per m² @ 2.5mm
  • Viscoelastic properties
  • Easy handling and adaptable to uneven surfaces
  • Has protective reinforcement scrim
  • Acts as a vapour control layer
  • Cold and heat resistant
  • Excellent ageing resistance
  • Rotproof

Tecsound is suggested for use as follows

  • Soundproofing against airborne noise in lightweight partition walls
  • Soundproofing against airborne noise in ceilings and lightweight roofs
  • Reduction of impact noise level in all types of floors, sandwiched between floor slabs and loose-laid flooring
  • Damping of impact noise caused by rain or hail on metal decks
  • Insulation of gutter pipes
  • Sound damping of metal sheets
  • Soundproofing of booths and machine-rooms


Description Unit Tecsound 50 Tecsound100
Nominal Thickness mm 2.5 5
Length mm 6000 4000
Width mm 1220 1200
Overall Superficial Mass kg/m² 5.0 10
Density kg/m³ 2000 2000
Compressive Strength kg/m² 4.84 4.84
Tensile strength N/cm2 30 30
Vapour Water Resistance Factor µ ≥ 4.15 x 104 µ ≥ 4.15 x 104
Fire Resistance Euroclass B, s2, d0 (Class 0)
Airborne Sound Insulation dB 25.2 31.2


Substrate: Tecsound lends itself to all types of normal building substrates (renderings, gypsum board, metal, DM, plastic materials). The substrate must be even, smooth, clean and dry. It must also be free from elements that could damage the membrane. If the rendering is old, its condition must be checked to avoid adhesion problems between the Tecsound sheet and the rendering.

Installation of the membrane: When using on a floor it should be loose laid on the floor surface with joints butted together tightly. Prior to installing on a vertical surface membrane, an adhesive should be applied according to the instructions of the adhesive manufacturer before bonding the two surfaces. Pressure must be exerted on all the points to ensure correct adherence. It can also be mechanically fastened. The number of fixings will depend on the product, the support and the system where the membrane will be applied.

Installation of the membrane on metal decks: Extend the roll over the substrate, keeping the reinforcement face up so it protects the membrane. The membrane must be applied in such a way that the length of the roll is perpendicular to the direction of the deck profile. The membrane must be made to follow the profile of the metal support at all times, ensuring that there is no formation of air pockets. The thermal insulation boards are then installed and mechanically fastened.

Laps: Overlap 5 cm both vertically and horizontally. Care must be taken to always seal the laps correctly, as small openings can reduce the level of acoustic insulation required.

Yield: 1 m2 of membrane covers approximately 0.90 m2 of surface area, including overlaps.

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