How to soundproof a shared party wall

How to soundproof a party wall in a 1960s semi-detached home the right way. We treat every noise path (party wall, suspended floor void, ceiling void, chimney stack & fireback, RSJ/steel beam, window wall, and an upstairs paramount board partition) to stop neighbour noise, airborne and flanking transmission.

You’ll see why dot & dab plasterboard and quick-fix panel/clip systems often fail, and how our four-step soundproofing method (find holes → open voids → sound-deaden → isolate/add mass) delivers a real reduction so you can stay in the home you love.

Materials & methods: viscoelastic sound-deadening membrane, 10–20 mm rubber isolation, RW3 Rockwool, resilient bars/channels, honeycomb/constrained-layer board, 15 mm acoustic plasterboard, acoustic sealant/adhesives, moisture membranes, acoustic secondary glazing. Includes our “tuck it up & tuck it down” approach for floors/ceilings.

Need help?
🎓 Noise-Free DIY Soundproofing Course 👉 https://jimprior.com/nfdiy-s4b-offer/
• 🤝 DWY consults 👉 https://jimprior.com/work-with-me/
• 🛠️ DFY Quietco installations:👉 https://quietco.uk/contact-us/


FREE STUFF 👇👇👇👇👇

🎥 Soundproofing for Beginners | Full Course Tutorial
   • Soundproofing For Beginners | FULL COURSE ...  

💻 FREE SOUNDPROOFING MASTERCLASS This link takes you to my website and tells you what the Masterclass is about:
https://jimprior.com/soundproofing-ma...

📚 Get your FREE copy of the Noise Free Home Book: https://quietco.uk/free-book/

🪚 🔨 Purchase the Full Noise Free DIY Soundproofing Course:
https://jimprior.com/nfdiy-s4b-offer/

YouTube Videos you might like:

7 Ways to Soundproof a wall:
   • 7 ways to Soundproof a wall | #diy  &list=PL-ZigmSd311dNw8Tbe1IfLiJgEiJcjvMN

7 Ways to Soundproof a Ceiling
   • 7 WAYS TO SOUNDPROOF A CEILING | #diy  &list=PL-ZigmSd311dNw8Tbe1IfLiJgEiJcjvMN

How much does SOUNDPROOFING cost?
   • How much does #soundproofing cost?  

If you are a DIYer and looking to soundproof or renovate you own home, why not consider the soundproofing education courses available below:

👉 Noise Free DIY Soundproofing Course Trailer:
   • The Noise Free DIY Soundproofing Course  

Spray contact adhesive, (Non chlorinated and Safe Heat Tested)
👉 https://bit.ly/3s82pjv

Work With ME
👉 https://jimprior.com/work-with-me/

Timestamps
00:00 Intro & who this helps
00:39 Problems: speech, thumps, washing-machine vibration
01:37 Method: no quick fixes; treat every noise path
02:54 Root causes: holes + suspended floor “amplifier”
06:33 Why the party wall alone fails
10:33 Ceiling/floor opened; holes bricked & sealed
11:14 Suspended floor: clear void, damp/airflow; joist disconnection notes
14:28 Fireback & chimney stack: deaden + resilient layer
17:16 RSJ & window wall: deaden RSJ; 50 mm wall system
20:30 Party wall build: deaden → floating frame → RW3 → resilient bars → boards
22:23 Tuck down & up into floor/ceiling voids
24:00 Fireback build details; chimney finish
26:32 Rear/extension wall & RSJs explained
28:39 Ceiling: RW3 infill + full acoustic overboard
29:41 Upstairs paramount board flanking path
31:42 Fixtures/fittings (sockets, TV), putty-pad myth
34:21 Finishes; window returns; absorption (carpet/soft furnishings)
36:52 Acoustic secondary glazing (bay)
37:43 Results after ~4 weeks; realistic expectations
40:18 Strategy tips; old vs new-build
41:46 Wrap-up & CTAs

soundproofing, party wall soundproofing, noisy neighbours, flanking noise, suspended floor void, RSJ soundproofing, chimney stack, RW3 Rockwool, resilient bars, MLV, acoustic plasterboard, floating frame, viscoelastic membrane, tuck it up & down, DIY soundproofing course, UK semi-detached.
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