Pro Timber Floor Soundproofing System – Carpet

Best For

  • Timber floors with a carpet finish where a high level of sound reduction is needed for loud noise, music, or persistent impact noise

Application

  • Timber floor soundproofing — flats, apartments, and living spaces where standard mat and underlay systems are insufficient

System Depth

  • Approximately 42mm overall build-up above the joists (excluding carpet)

Availability

  • Usually In Stock

Notes

  • Advanced DIY — requires lifting existing floorboards; check door and threshold clearances before ordering

Use the Soundproofing System Calculator below to enter your area and get the correct quantities — then simply add everything to your cart.

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Maximum Timber Floor Upgrade for Loud Noise and Music (Carpet Finish)

Our Pro Timber Floor Soundproofing System – Carpet is our highest performance timber floor build-up for situations where you're dealing with loud noise, music, or persistent impact noise and need a more serious upgrade. This system improves performance by upgrading the structural deck using 22mm STS TG4 and adding decoupling and damping at the joists with Green Glue Joist Tape, before finishing with two layers of 5kg MLV and Silent Floor Ultra Acoustic Underlay under the carpet finish.

To make things easier, our online calculator works out the quantities required for your project, with an additional 5% already allowed for waste.

Designed for Loud Noise & Music Through Timber Floors (Carpet Finish)

This Pro system is designed for timber floors where you need a higher level of sound reduction than mat and underlay systems can typically provide — particularly for loud airborne noise such as music, bass, TV at higher volume, and persistent impact noise. This is an advanced DIY system as it involves lifting the existing floorboards and installing a new structural deck.

The build-up consists of:

  • Existing floorboards removed
  • Green Glue Joist Tape applied to joists
  • 22mm STS TG4 Acoustic Floorboard (fixed with 50mm screws and PU Adhesive)
  • 2 layers of 5kg MLV (Soundproofing Mat), joints staggered
  • Silent Floor Ultra Acoustic Underlay
  • Everbuild AC95 Acoustic Sealant
  • Jointing Tape
  • Contact Adhesive

The finished build-up is approximately 42mm overall above the joists, excluding the carpet finish.

Important Supply Information

All components required for this system are supplied by us as part of the calculator output. The only items you need to source separately are the carpet finish itself.

How the System Works

This system improves floor sound insulation using multiple mechanisms:

  • Green Glue Joist Tape reduces vibration transfer at the joists — a common weak point in timber floors — by decoupling the new deck from the joist structure
  • 22mm STS TG4 Acoustic Floorboard adds stiffness and mass to the structural deck, improving the base performance before acoustic layers are added
  • 2 layers of 5kg MLV add dense mass to help reduce airborne sound transmission, with staggered joints to minimise sound leakage at seams
  • Silent Floor Ultra Acoustic Underlay provides additional impact reduction and acoustic comfort directly under the carpet, improving the overall performance of the finished floor
  • AC95 Acoustic Sealant and Jointing Tape reduce sound leakage through perimeter gaps and board joints

What We Supply

The system calculator works out the estimated quantities required for all soundproofing materials we supply, including:

  • 50mm Green Glue Joist Tape
  • 22mm STS TG4 Acoustic Floorboards
  • 50mm STS Cement Board Screws
  • STS Slow Set PU Adhesive
  • 5kg MLV (Soundproofing Mat) — 2 layers
  • Silent Floor Ultra Acoustic Underlay
  • High Strength Contact Adhesive
  • AC95 Acoustic Sealant
  • PVC Jointing Tape

We also include an additional 5% allowance for waste in the calculated quantities.

Your Soundproofing System Calculator

 



Key Benefits

  • Highest performance timber floor option for loud noise and music — Green Glue Joist Tape, dual MLV layers, and Silent Floor Ultra combine to deliver significantly better airborne and impact noise reduction than standard mat and underlay systems
  • Joist-level decoupling with Green Glue Joist Tape — applied directly to the joists before the new deck is installed, reducing vibration transfer at the structural level — a common weak point in timber floors
  • 22mm STS TG4 structural deck — heavier and stiffer than the 18mm Essential board, providing a more solid base for the acoustic layers above and improving overall mass and rigidity
  • 2 layers of 5kg MLV — double mass loaded vinyl with staggered joints adds dense mass to help reduce airborne sound transmission, including bass-heavy noise and music
  • Silent Floor Ultra Acoustic Underlay — provides additional impact reduction and acoustic comfort directly under the carpet, improving the overall performance of the finished floor
  • Suitable for carpet finishes — Silent Floor Ultra provides a high-performance acoustic substrate directly under the carpet
  • Advanced DIY system — requires lifting existing floorboards; suitable for competent DIYers or tradespeople comfortable with structural floor work
  • Built-in 5% waste allowance — calculator quantities include a 5% overage to account for cuts and waste, reducing the risk of under-ordering on site


Important Notes 

  • This is an advanced DIY system and involves removing existing floorboards
  • Results will vary depending on joist spacing, void depth, existing ceiling below, and flanking paths
  • Sealant quantities are an approximation only and should be treated as a guide
  • The calculator is provided as a guide only, and final quantities should always be checked before ordering
  • If the floor below is a sensitive area (bedroom/living room), consider addressing the ceiling below as well for best results


Installation Summary

  1. Lift and remove existing floorboards
  2. Apply Green Glue Joist Tape to joists
  3. Install 22mm STS TG4 using 50mm cement board screws
  4. Install first layer of 5kg MLV
  5. Install second layer of 5kg MLV, staggering joints where possible
  6. Tape joints and seal perimeter gaps with AC95
  7. Install Silent Floor Ultra Underlay
  8. Fit carpet finish as normal

For a more detailed installation guide click here.


Calculator Disclaimer 

This calculator is intended as a guide only. Advanced Acoustics will not be held responsible for any decisions made as a result of using this calculator.