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By combining the high mass and cementitious floor finish of Isosonic Screed Planks and the acoustic properties of Isorubber resilient layers the Isosonic Screed Plank Systems provide versatile and high performance acoustic solutions for all types of floor.

  • Provides hard and robust screed like finish.
  • Shallow build depth.
  • Extremely dense, increasing floor mass.
  • Dry system, saving on construction time and screed pumping.
  • Direct to joist, structural solution available.
  • Compatible with the Isorubber range of acoustic products, so solutions can be tailored to project requirements.
  • Ideal for use with Under Floor Heating.
Acoustic Performance:
Test results will vary for each floor type.
Site test performance: Impact = 58dB LnTw Airborne = 52dB Rw + Ctr
Test performance shown is an average for Isosonic Screed Plank 20 when used over 6mm Isorubber Base on a structural timber floor with an Isosonic Ceiling system.

Isosonic Screed Plank Variants:

ISP 18
Board Size: 18mm x 1.2m x 0.6m
Board Weight: 14.26Kg (70 boards per pallet)

ISP 20
Board Size: 20mm x 1.2m x 0.6m
Board Weight: 15.84Kg (50 boards per pallet)

Board Size: 18mm x 1.2m x 0.6m
Board Weight: 19.44Kg (50 boards per pallet)

Board Size: 25mm x 1.2m x 0.6m
Board Weight: 27.0Kg (35 boards per pallet)

Isosonic Plank Adhesive
Bottle Size: 1L
Bottle Weight: 1Kg
Coverage: Approx. 25m2 of Screed Plank (per bottle)

Isoedge 6/75
Roll Size: 6mm x 75mm x 50m
Roll Weight: 1.5Kg (15 Rolls in a Bag)
Density: 30Kg/m3

Isosonic Brackets 45
Box Quantity: 100
Box Weight: 5.8Kg

Isosonic Ceiling Strip
Roll Size: 40mm x 25m
Roll Weight: 0.8Kg (10 Rolls in a Bag)
Density: 30Kg/m3

Isosonic Screed Plank boards are high mass, gypsum T&G flooring boards available in four variants: ISP 18 and ISP 20 – For use as fully supported floating floor and have a mass of 1100Kg/m3. ISPS 18 and ISPS 25 – For use as a spanning structural deck or supported floating floor and have a mass of 1500Kg/m3.

Isosonic Plank Adhesive is a single layer joint adhesive used to bond the T&G joints of Screed Plank boards. It is fast setting, will not discolour overlays and has good heat resistance.

Isorubber resilient layers provide thin, robust acoustic isolation with numerous underlay and soft covering variants available.

Isosonic Cleats provide acoustic separation to a standard MF ceiling construction. A universal fixing, they simply replace the standard soffit cleats and should be compatible with all MF ceiling constructions.

Isosonic Ceiling treatments utilise Isosonic Hangers or Isosonic Brackets to separate the plasterboard from the joist. This extensive range of acoustic hangers and brackets provide the flexibility to design a ceiling to suit most situations.

The Isosonic Hangers are attached to the bottom or side of the joists and hold 50 x 50mm battens which the plasterboard is then fixed into. An acoustic foam or rubber layer within each hanger isolates the battens from the joists, reducing direct sound transfer between the joist and the plasterboard.

The Isosonic Brackets are attached to the bottom of the joists and hold 50 x 50mm battens or standard metal channels which the plasterboard is then fixed into. Specially designed rubber fixings isolate the brackets from the joists, reducing direct sound transfer between the joist and the plasterboard.

Please refer to our Brackets and Hangers page for further information regarding the options available.

Isosonic Ceiling Strip should be used around the ceiling perimeter to help reduce flanking sound transmission.

The Isosonic Screed Plank system is a versatile acoustic treatment that is ideal for lightweight floors. With the choice of 4 Screed Plank board variants, multiple types of Isorubber resilient layer and various Isosonic Ceiling options a solution can be tailored to the needs of the project.

The Screed Plank board range is divided into two types, fully supported boards (ISP) and spanning structural boards (ISPS).

The ISP boards are fitted as a floating floor over an isolating Isorubber layer that is laid onto a structural deck. The ISPS boards are suitable for spanning and so can be used as the structural deck, directly over joists. An isolating layer of Isorubber can be used between the joist and ISPS or over the ISPS.

The Screed Plank boards also work excellently over under floor heating systems. The high mass Screed Plank boards provide an even and speedy heat distribution and are suitable for use with warm water and electrical systems.

An Isosonic Ceiling is also required, consisting of Isosonic Cleats with an MF ceiling system. Alternatively, Isosonic Hanger or Isosonic Bracket systems can be used. All ceiling systems are under drawn with a layer of 12.5mm plasterboard and either a layer of 19mm plasterboard plank or 15mm Soundbloc board.