28mm Karma Acoustic Overlay 28 Chipboard

28mm Karma Acoustic Overlay 28 is a high performance acoustic floor panel with an exceptionally high sound reduction performance to height ratio. The combination of P5 chipboard and cross linked polyolefin foam make the overlay board a complete sound proofing solution, tackling both impact and airborne noise. It is used on an existing floor, new ply or chipboard floor or directly to concrete/screed floors making it an ideal product for refurbishment and new build projects. Lightweight non load bearing partitions can be supported on top of Karma Overlay 28 boards.

• Cost-effective solution,
• Quick & Easy to install, offering savings labour,
• Excellent impact and airborne sound performance,
• Minimal height increase,
• Can be used with any floor finish,
• Can be used on existing subfloors or concrete/screed floors,
• Non load bearing partitions can be built off the finished floor surface,
• Eliminates the requirement for a damp proof membrane,
• Fire rating of top layer Class 0 surface spread of flame to BS 476,
• GWP <5 Global Warming Potential of resilient layer,
• Product made recycled or recyclable materials.

• New build apartments, hotels, student accommodation and houses with timber joist floors,
  
• Refurbishment projects where height restrictions exist but reliable performance is still required

• The boards should be located into the environment in which they are to be fixed at least 24 hours prior to fixing.
• The subfloor evenness tolerances must not exceed +/- 2mm per 2 metre run.
• The base floor must also be clean and completely dried out.
• The floor should be clear of pipes and other obstacles.
• Place Karma 5mm x 100mm wide flanking strip between the panels and perimeter walls and existing door frames during installation to reduce flanking sound transmission.
• Lay boards with the grooved edges or cut edges facing the perimeter walls.
• Use the off cut from the final panel in the first row to commence the next row.
• Do not start a row with an off cut less that 250mm long.
• Lay panels in a brick bonded fashion.
• While laying boards apply a liberal amount of Karma PU adhesive to the grooves of the T&G joint and tightly butt the boards together.
• Wipe off excess adhesive with a damp cloth.
• Avoid walking on the boards until the adhesive has dried.