FT55 AL Pipewrap - High Performance Acoustic HVAC Insulation

  • FT55 AL Pipewrap - High Performance Acoustic HVAC Insulation
Product Code: A210
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Price: £126.00
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FT55AL High Performance Acoustic Insulation for Pipes

Product Description

FT 55 AL is a soundproofing complex made up of a porous felt mat and our high performance 5kg/m² synthetic acoustic membrane, faced with reinforced aluminium foil.



  • Increases acoustic insulation of the duct element to which it is applied, basing its effect on the presence of an absorbent element and a high elasticity and high density insulating membrane
  • Tested to BS EN 14366:2004
  • Flexible
  • Easy handling and adaptable to uneven surfaces
  • Cold- and heat-resistant
  • Excellent ageing resistance
  • On surfaces in good condition, installation can be corrected without loss of adhesiveness
  • Made using 100% recycled felt


  • Soundproofing of PVC sewage ducts in building
  • Soundproofing of air conditioning ducts
  • Soundproofing of industrial pipes


Measure the development of the duct to be soundproofed, adding 5 cm for overlaps. Use scissors to cut the required quantity of FT 55 AL, crosswise. Wrap tie duct in such a way that the textile felt is, as much as possible, in contact with the surface, starting at the lower part of the pipe. Use a plastic flange for anchoring, every 20 cm. To seal the overlaps, an aluminium adhesive tape is used. It is important that the joints are perfectly sealed to prevent diminishing of the insulation. Usually the treated pipe is boxed in with double 15mm plasterboard to finish (with a rockwool infill in the box section).

This product is also extremely useful as an underlay inside vehicles to reduce road noise. It should be applied with the foil side facing upwards and felt side facing down to the chassis.

The substrate must be free from materials which can damage the product both during and after application, such as mortar remains, etc.

FT55AL Acoustic Duct Lagging shown placed around a soil pipe stackDrainpipes

Noise caused by the discharge of fluids in drainpipes is one of the commonest problems in residential and office buildings, due to low acoustic insulation provided by standard pipes built into walls and false ceilings.

In one single product FT 55 AL gives you an absorbent material and a heavy layer insulating membrane, with the characteristics needed to provide an answer to this problem.

Soundproofing of drainpipes and soilpipes (especially at the elbows) as well as ductwork.

Technical Data
Test Value
Density (membrane) 1.9g/cm³
Pliability (UEAtc) Does not break when bent at -10°C
Tensile Strength (UNE 104-281/6.6) >30 N/cm² (Membrane)
Elongation (UNE 104-281/6.6) 300%
Thermal Conductivity Coefficient 0.037 W/m°C (felt)


Packaging and Storage
Type kg/m² Thickness (mm) Packaging
FT 55 AL 5.5 12.6 5.5 x 1.2m rolls


measuring the pipe diameter to determine the amount of FT55AL required including the overlapcutting the FT55Al to the correct width generally along its lengthwrapping the FT55AL around the pipe

cable tie the FT55AL once wrapped around the pipeapplying our foil duct tape around the horizontal seams of the FT55ALcontinue wrapping the FT55AL up the pipe

apply the foil duct tape to the vertical seams of the FT55ALfinish off the box section with double plasterboard with acoustic wool infill after finishing installing the FT55AL

Normalised airborne sound insertion loss, IL,a,A according to EN 14366: 2005 - dB(A) 100Hz <> 5000Hz
Flow rate 0.5 l/s 1.0 l/s 2.0 l/s 4.0 l/s
IL,a,A with FT55AL and no box section 13 14 14 12
Test report: CSTB 26065008-1

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