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*Please Note: PhoneStar was previously branded as Phonewell

 

Soundproofing Tips and Advice for Walls

  • Do not let anything bridge across the wall linings (incl. mortar droppings on the wall ties).
  • For twin walls ensure no connection between the two leaves except where ties are necessary for structural reasons.
  • Ensure all block work joints are fully filled with mortar.
  • Ensure all cavity stops/closers are flexible or fixed to one frame only.
  • If using cavity insulation, ensure a snug and accurate fit between studs without sagging and without gaps.
  • Keep chases for services to a minimum and fill with mortar. Avoid back to back chases.
  • Where electrical sockets are absolutely necessary pack behind them with PhoneStar and caulk with flexible sealant. Do not place sockets back to back.
  • Seal all gaps in the original wall especially at the perimeter edges before work commences. Remember sound passes through gaps!
  • Ensure the resilient bars and plasterboard DO NOT TOUCH the adjacent walls, floor and ceiling as they are rigid and will send vibrations into these other structures. Caulk the perimeter gap around the plasterboard with flexible sealant, and tape and seal the plasterboard joints.
  • Ensure the PhoneStar boards DO TOUCH the adjacent walls, floor and ceiling with no gaps between or around the boards.
  • Stagger joints between PhoneStar and plasterboard to avoid air paths.

It is imperative that our Installation Instructions are correctly adhered to for best possible results and please read about flanking noise.

 

 

Soundproofing Tips and Advice for Floors

  • Seal all gaps in the original floor especially at the perimeter edges and between floorboards, if applicable, before work commences. Remember sound passes through gaps!
  • Lay PhoneStar floating on the floor in a brickwork pattern tightly butted together – no need to tape or caulk joints. Ensure the PhoneStar boards DO TOUCH the adjacent walls with no gaps between or around the boards.
  • Flanking strips are not necessary around PhoneStar soundproofing boards. However if an 18-22mm floating top surface is installed above PhoneStar, insert flanking strips around the perimeter of this flooring board to isolate the floor from walls and/or skirting boards. Alternatively a 5mm (min) perimeter gap may be caulked with flexible sealant.
  • If using thermal insulation, lay the quilt snugly between all joists ensuring no gap remains.
  • Ensure ceiling battens or resilient bars are fixed at right angles to the joists below and they must NOT TOUCH the adjacent walls.
  • Screw ceiling plasterboard into battens or resilient bars only – not the joists. Ensure the plasterboard DOES NOT TOUCH the adjacent walls as it will transfer noise into the walls. Caulk the perimeter gap around the plasterboard with flexible sealant, and tape and seal the plasterboard joints.
  • Butt planks or blocks in block and plank floors tightly together and grout all joints.
  • Fill all voids between walls and floors to enhance soundproofing.
  • Try not to use downlights in an acoustic floor and ceiling structure but if required use special fire and acoustic rated downlights. Alternatively the lights can be boxed in with PhoneStar sound insulation. A better acoustic alternative is to install a suspended metal framed ceiling a minimum of 100mm below the upgraded acoustic ceiling so that the downlights will not interfere with the acoustic integrity of the ceiling.
  • If there is only an issue with impact noise or footstep noise going down into the room below, please consider using 12mm or 19mm thick Pavatex Standard Natural Wood Fibre insulation which is also very effective but is more competitively priced. The ceiling below can also be decoupled if possible for enhanced impact soundproofing results.

It is imperative that our Installation Instructions are correctly adhered to for best possible results and please read about flanking noise.

 

 

What is the difference between Impact Sound and Airborne Sound?

Impact sound arises from impacts directly on the floor above e.g. footstep noise or moving furniture, which send vibrations into the floor deck, the timber joists or concrete floor and then down into the plasterboard downstairs. This can be reduced by the addition of a quality resilient layer on top of the floor to absorb the impact. This can be a soft product but please be aware that foam and rubber products do flatten and harden over time and lose their effectiveness. PhoneStar has a soft but compacted filling that will not compress over time – in fact it has a very high loading capacity (5kN/m²) and so will withstand very heavy loads. Decoupling of the ceiling downstairs is also critical to significantly reduce vibrations between the floor / ceiling structure and the plasterboard. PhoneStar very significantly reduces impact sound through both timber and concrete floors.

 

Airborne sound arises when sound waves from television, music, talking or traffic pass through the air and then vibrate the wall or floor so that they pass through to the other side. This noise can only be significantly reduced by the addition of a dense product with mass, but it must also be soft. PhoneStar is heavy (18kg/m²), is very dense (1200 kg/m²) and has a compacted but loose soft sand filling contained within an engineered, fluted cardboard carcass, and these are the critical characteristics required for airborne noise reduction. Soft and lightweight insulation products e.g. thermal insulation quilt will not reduce airborne noise in any noticeable way – it may reduce reverberation within a cavity though. Heavy and dense, but hard, products will give better results but they vibrate a lot within themselves and so are still not ideal. PhoneStar very significantly reduces airborne sound through masonry and timber structures, whether they are floors, walls or ceilings, due to its unique characteristics.

 

We undertook several rigorous and independent tests incorporating PhoneStar on various structures, at the UKAS accredited, Sound Research Laboratory (SRL). Please note though that these results may not be replicated on site, due to many influencing factors of a complex nature such as workmanship, flanking conditions, poor quality materials or other external factors which cannot be fully replicated within laboratory conditions. So it is advisable to try to exceed Building Regulation requirements to allow room for error.