Hallway & Under-Stairs Guide
How to Soundproof a Home Office Set Up Directly Under a High-Traffic Staircase
A home office positioned directly under an actively used staircase receives impact sound — footsteps, running, and the general vibration of movement — transmitted through the stair structure above. Reducing this to an acceptable working level requires acoustic treatment at the stair-to-office interface.
Impact Sound vs. Airborne Sound in Under-Stairs Offices
The dominant noise issue under a staircase is impact sound — structure-borne vibration from footsteps — rather than airborne sound. Airborne sound (conversation, TV) can be addressed with acoustic panel linings on the office walls. Impact sound requires decoupling the floor surface from the stair structure — placing resilient anti-vibration mats or a floating floor platform over the existing stair soffit lining. An acoustic quilt between the stair soffit and the office ceiling panel, combined with 50mm acoustic slab between the joists, reduces impact transmission significantly.
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Practical Acoustic Specification for a Compact Space
A complete acoustic treatment for an under-stairs office of 1.5m × 1.2m involves: 50mm acoustic mineral wool between the stair joists above (installed during the build), 12.5mm acoustic plasterboard on the office ceiling, 9mm acoustic board on all wall faces, and a resilient anti-vibration layer under the floor surface. Combined, these measures can reduce impact sound transmission by 10–15dB — meaningful improvement but not complete isolation. For Zoom and Teams calls, a headset with noise cancellation eliminates the microphone pickup of impact noise entirely.
FAQ
Common Questions
Can a home office under the stairs ever be truly silent from stair impact noise?
Complete isolation is not achievable without structural floating of the entire office shell — disproportionate for a small space. Practical improvement to an acceptable level is achievable.
Does acoustic treatment significantly increase the cost of the office build?
Adding a basic acoustic specification adds approximately £300–£600 to the build cost of a small under-stairs office.
Are video call microphones sensitive to impact noise?
Standard laptop and headset microphones are significantly less sensitive to impact noise than to airborne noise. A quality headset with noise cancellation eliminates almost all impact noise from the recorded audio.
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