Key Benefits

• High mass build-up for airborne noise reduction — two layers of 5kg/m² MLV combined with two layers of 15mm Knauff Soundshield acoustic plasterboard add significant surface mass, reducing the transmission of everyday airborne noise including speech and TV
• Cost-effective ceiling soundproofing for timber construction — designed as a practical upgrade for timber joist ceilings where the primary issue is speech, TV noise, or general household sound at normal levels
• No structural work required — the system overboards the existing ceiling surface, making it achievable without removing the existing ceiling or altering the structure above
• Complete system supply — all components are included in the calculator output, so you can order everything needed for your ceiling soundproofing project in one place
• 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
• Competent DIY achievable — a full installation guide is available covering MLV layering, plasterboard fixing sequence, joint staggering, and airtightness sealing

Important Notes

• This system is designed primarily for airborne noise (speech/TV).
• If the issue is heavy impact noise from above, a different approach may be required.
• Results will vary depending on the existing ceiling construction, joist spacing, void depth, 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

Installation Summary

• Ensure the existing ceiling surface is sound and suitable for overboarding
• Install first layer of 5kg MLV
• Install first layer of 15mm acoustic plasterboard
• Install second layer of 5kg MLV, staggering joints where possible
• Apply contact adhesive as required during installation
• Install second layer of 15mm acoustic plasterboard, staggering joints
• Seal perimeter gaps with AC95 and tape joints as required

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.