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*Please Note: PhoneStar was previously branded as Phonewell

This Direct to Stud Wall solution offers very good results when soundproofing stud walls and should meet Building Regulations provided that the original wall is well constructed and that flanking noise is not a major issue. However where space permits we would highly recommend the Decoupled Timber Stud Wall Soundproofing Solution which will provide even higher noise reduction through timber or metal stud walls.

27.5mm to 30mm

Direct to Timber Wall Solution
Simple slimline solution with a high airborne performance of 50dB. This solution is very popular for reducing airborne noise between bedrooms, bathrooms and offices as well as for meeting Building Regulations.


  • Wall with or without existing plasterboard
  • (Optionally fit 45kg/m³ mineral wool to suit stud cavity, for better results)
  • 15mm PhoneStar Acoustic Insulation
  • 12.5mm or 15mm sound resistant plasterboard

Materials List: (available from our stockists)

  • PhoneStar Acoustic Insulation (1200mm x 800mm x 15mm)
  • PhoneStar Eco-Tape (50mm x 50M)
  • Sound resistant plasterboard (2400mm x 1200mm x 12.5 or 15mm)
  • Adhesive foam and foam gun (approx. coverage per can is 15m²) OR drywall screws can be used in place of the adhesive foam with only 1dB reduction in performance
  • Flexible sealant or Acoustic mastic

Please download the full installation instructions for soundproofing stud walls before commencing work:

Brief Instructions: (have you considered Flanking Noise?)

1. Make existing wall sound by removing any loose material.

2. Bond or screw PhoneStar to the existing wall and butt the panels closely together. Do not leave any gaps between or around the PhoneStar layer. See Cutting and Taping PhoneStar.

3. Bond the plasterboard to the PhoneStar or screw through PhoneStar into the studs, being careful to stagger joints and leave a 5mm perimeter gap around the plasterboard at the floor, walls and ceiling. Optionally add a second layer of plasterboard for better results.

4. Seal 5mm perimeter gaps with flexible mastic or acoustic sealant.

5. Tape and seal all plasterboard joints and fill screw heads.

6. Fit skirting boards ensuring no contact with the floor – leave a 2mm gap.