Ideas Library · Ceilings
A Single Acoustic Raft Floating Over One Zone
A deliberately partial acoustic move rather than a whole-construction one: a single raft hung over the zone that needs it, whose size, height and edge are the design content, and which does not pretend to be separating construction.
Spaces:Dining roomHome officeOpen-plan kitchen and diningStair hallStudio or workshop
Style:ContemporaryArchitecturalUtilitarianModern
Where this idea works
Where this idea works
Contexts this direction tends to suit — and, honestly, where it may not.
- Rooms where one activity is noisy and the rest of the space is fine
- Period rooms whose existing ceiling is worth keeping intact
- Open plans where a raft can mark a zone as well as absorb within it
- Owners wanting a reversible measure rather than a rebuilt ceiling
Where it may not fit
Where it may not fit
- Noise passing between rooms or dwellings, which a raft does not address
- Ceilings where nothing may be hung from the structure above
- Rooms where an object below the ceiling would obstruct sightlines or fittings
Planning
Planning considerations
- A raft absorbs sound within the room and does nothing about sound passing through the floor above, which is a different problem entirely
- Its size relative to the zone below is what makes it read as a designed object rather than a leftover board
- How far it hangs below the ceiling changes both its appearance and its effect, and the effect is for an acoustic professional to assess
- Whether anything may be hung from the structure above is answered before the raft is designed
Layout
Layout considerations
- Set the raft out on the table or desk below it, not on the room
- Leave a clear margin around the raft so the ceiling still reads behind and past it
- A raft low enough to be seen edge-on needs its edge detailed as a visible face
- Consider what lighting does above and below it, since a raft shadows whatever sits over it
Materials & finishes
Materials and finishes to discuss
Named generically as starting points to discuss with professionals — not specifications, and not priced.
Consider:Acoustic absorbent panelsPerforated acoustic plasterboardFabric-faced panel finishesSuspension wires and fixingsTimber edge framing
- Absorbent faces are soft and mark, which matters at a height people can reach
- Suspension fixings carry a hanging load, and what they fix into is a structural question
Maintenance & durability
Maintenance and durability questions
- Soft and perforated faces collect dust and cannot always be cleaned like a painted ceiling
- A raft over a dining table sits in the path of cooking residues and steam
Professional review
What to ask a qualified professional
Bring these questions to a designer, contractor or the relevant qualified professional or authority.
- What is the actual noise problem here, and would an acoustic professional say a raft addresses it?
- What can the structure above accept as a hanging fixing?
- How large should the raft be relative to the zone it covers?
- How far below the ceiling should it hang, and what does that leave for head height and sightlines?
- How is the panel face cleaned, and will it stay acceptable above a table?
More ideas
Related ideas
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