100% Pure Sheep's Wool SilentWool Floor with b/paper Acoustic Underlay 1 x 25m (25m2)

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Multi-purpose underfloor acoustic insulation made from pure new sheep’s wool, factory pre-fitted with a breathable backing paper suitable for use on

  • concrete floors
  • solid timber floors,
  • laminate floors,
  • parquet floors  
  • OSB/MDF  

It can be installed upon joisted, raft and concrete floors as well as OSB/MDF boards.

  • An exceptional 21dB Reduction in Impact Sound Level is achieved using SilentWool: Floor insulation. (Test: ISO 140-8 Delta Lw)
  • 100% Pure new sheep's wool         
  • Impact & airborne sound insulation               
  • Inherent thermal Insulation performance     
  • Easy to cut - durable & long lasting shape   
  • Suitable for use with underfloor heating
  • Integrated moisture protection layer - breathable backing paper
  • Patented insect pest protection
  • Patented mould & mildew protection

Silentwool has a very high density making it the perfect solution to acoustic problems. The insulation is easy to cut, durable, making it a great way to soundproof your floors.

Silent Wool carries the Nature Plus Seal


SilentWool Floor rolls are 3.5mm thick 1m wide and are 25m in length. Each roll covers 25m2

Price is per Roll

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SilentWool: Floor is a roll of 3.5mm thick Sheep Wool Insulation, that cushions the impact between the finished surface (laminate, solid or semi-solid wooden floors) and the subfloor (concrete or OSB boards). The layer of wool removes the contact between these two hard surfaces by creating an intermediate layer which absorbs this vibration.

SilentWool: Floor rolls are produced in 1m wide rolls and are 25m in length. 

General: SilentWool: Floor is supplied in 1m width and 25m length rolls. The product should be stored flat on a dry surface. SilentWool: Floor can be used under solid timber floors, laminate floors, parquet floors and OSB/MDF boards. It can be installed upon joisted, raft and concrete floors as well as OSB/MDF boards.

Tools Required: Scissors, wide moisture-resistant sticky tape, measuring tape and marking pen.

Preparation: The sub floor must be thoroughly clean and dry. When setting on a concrete floor, ensure surface is even and free from imperfections that may damage the floor being installed.

Installation: SilentWool: Floor will unroll with the breathable paper on top. At the walls, take edges of the insulation up the wall by 2cm to avoid sound bridging. Cut around any obstacles using the measuring tape and marking pen for accuracy. Side-by-side sheets should be joined with sticky tape and not overlapped to avoid an uneven finish. Install the floor as per manufacturer’s instructions. Return to the floor edges once complete and fold the insulation behind itself to further insulate from the walls.

1) Silent Floor is layedt paper side ‘up’ so when you click your wooden floor into place, you do NOT catch any fibers in the underlay during this process.. .so it can’t / wont’ get ruffled under the flooring.

2) keeping the paper on the top surface also protects the wool from any spilt liquid which  may fall between hairline cracks in the wooden flooring.

DO NOT USE NAILS.... nailing through the underlay  will allow sound to carry through the nail,  avoid putting nails through the underlay. 

100% sheep’s wool Product

Dimensions (m)

Coverage Per Roll

Maximum Rolls/Pallet


10cm x 10m

1 m2


 Floor with backing paper

1m x 25m

25 m2



1m x 25m

25 m2


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Roll Length


Roll Width


Roll Area


Roll Weight


Reduction of Impact Sound (ΔLw)

21dB (ISO140-8)

Water Diffusion Resistance (Sd)


Thermal Transmittance (U Vlaue)


Weight / Area


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