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How to soundproof a ceiling

Soundproof ceiling

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How to install a soundproof ceiling using our high performance, space saving Oscar Iso-Mount acoustic hanger systems.

Buy our Oscar Iso-Mounts online

View our soundproof ceiling product range


This page shows how to install a soundproof ceiling by using our high performance, space saving Oscar Iso-Mount Type1 system.  A fully isolated, floating soundproof ceiling is now possible with as little 6mm ceiling height loss.  All the work can be done from the room below by a local builder or competent DIY person so your noisy upstairs neighbours never need to know!

The Oscar Iso-Mount Type1 system has the following advantages:

  • Class leading acoustic performance
  • Achieves (better than), compliance with British building regs Document E
  • The Iso-Mount uses a standard clip-on steel channel that is widely available from several manufacturers
  • Easier and faster than installing products on the floor of the room above
  • Fast and simple clip together installation
  • Appears no different to a standard plastered ceiling once completed

View full Iso-Mount Type1 installation guide


A short how-to guide on how to soundproof your ceiling at home

  1. First of all, find the lowest point of the lowest joist as a reference to ensure level insulation. Mark the beam a maximum of 100mm in from the wall to locate the first bracket. Then mark the bracket positions on the sides of the joists – evenly spaced – at 3 per square metre.  Each mount has a maximum point loading of 18kg so each square metre can have up have up to 54kg of loading capability which is more than adequate for most domestic ceilings.

  2. Next fix each bracket with a minimum of two screws fixed diagonally.  Make sure they’re correctly aligned and avoid pipes and cables.  Once they’re secured and the levels are checked, you can move onto the channel clips.

  3. Starting with the end, slide or clip the channels onto the mounts.  They run parallel to the joists so you can fix the Iso-mounts high on the joist which will reduce ceiling height loss.

  4. Then, attach our foam self-adhesive strip around the line of the ceiling.  This will prevent the ceiling boards from directly touching the walls, creating a noise path.  Once this is done, screw the boards onto the channel clips.  You can use standard 12mm gypsum boards with no special acoustic properties.  Push the outer boards to compress the foam strip against the wall.

  5. Seal the boards with Oscar’s acoustic sealant.  Once the boards have been fixed, it’s time to install the loose fill cellulose.

  6. Cut some small discus from the board.  Then fill the void using Celbar, an environmentally friendly, non-itchy, flame retardant and recyclable filler.  This can be done by hand, but we do have specialised machines that can speed things up.  This will provide outstanding noise and thermal insulation.  Once this is complete, replace and seal the discs that were cut out and fix a second layer of gypsum board.

  7. A qualified electrician should check if downlighters require hoods and that electrical wiring in the ceiling void is of adequate capacity to handle the high thermal insulation given by Celbar insulation.

If you follow these steps you too can easily soundproof your home against noisy upstairs neighbours.  


Need to soundproof timber joist or concrete ceilings? 

Our Iso-Mount Type2 acoustic hangers fix under existing concrete & timber joist ceilings with just one fixing saving time & money.  Extensions are also available for deeper voids.

View full Iso-Mount Type2 page


The solution for noisy upstairs neighbours

At some point in our lives, we’ve all probably had noisy upstairs neighbours.  The ones who stomp around, play loud music, or have lively discussions at three in the morning.  We’re already living on top of each other (43% of Londoners now live in flats) which comes with problems which will only get worse with increased urbanisation.  Unfortunately, most floors and ceilings offer little in the way of insulation against noise.  A rigid structure of ceiling boards, joists and floorboards all screwed together will transmit noise, using the ceiling as a drum skin.  Fortunately you can install measures that will break the path of vibration.

Our Iso-Mount acoustic hangers will help you install an effective soundproof ceiling to give you peace and quiet at home.  The system has been designed to be easy to use.  With our engineering heritage we have plenty of experience of installing acoustic barriers so we know the importance of ease of use to save valuable time.  It also helps design, as you’ll have to sacrifice as little as 6mm of ceiling height.


Oscar Iso-Mount reviews

"Ceiling is complete...

I've tested it by powering up a loud DeWalt router in the garage and seeing how loud it is in the room above.

WOW.  Can hardly hear it...It really was much quieter than I thought it would be.  I can finally use the workshop in the evening when the kids are asleep in the room above.  I'll admit not having done it before I was unsure if it would deaden the noise enough for power tools...but I am blown away by how well it works.

Thanks again for your help - much appreciated."

James Burrows
Home DIY installer
5 star review rating


“The whole transaction has been simple and easy.  I fitted the ceiling this weekend and it’s made an instant difference.  So much so that I had to ask the owner of the flat above if he had been using the room above.  I will recommend the product to my friends and will use it on other ceilings in my flat.  Keep up the good work.”

Jim Hood
Home DIY installer
5 star review rating


Important safety information:

  • Only competent persons fully conversant with the use of personal protective equipment should carry out the floating ceiling installation.
  • Consult the manufacturers of the plaster board for fixtures to be fixed directly to the plasterboard.
  • Use fastenings as recommended by the plasterboard manufacturer.
  • Celbar loose fill void insulation (as recommended), is also an excellent thermal insulator.  Bring this to the attention of your qualified electrician who may have to allow for heavier cables and ventilation gaps around down lighters, (too be avoided if possible as this will allow sound through). 

This project uses

Oscar Iso-Mount Type1 - Soundproof ceiling

Oscar Iso-Mount - Type1

Acoustic hanger for timber joist ceilings

  • The minimum of ceiling height is lost: as little as 6mm (less than 1/4 inch)
  • All the work is done from the room below; no work is required to the floor above