Retrofit Soundproofing Between Floors: Mixed-Use Event Venue

• Project: Between-Floor Soundproofing Retrofit at Armature Works Mixed-Use Event Venue
• Facility Type: Restored Mixed-Use Building (food hall and ground-floor kitchens, second-floor event space)
• Issue: Kitchen and Food-Hall Noise Bleeding Up Into the Event Floor
• Constraint: Active Building, No Ground-Up Reconstruction Possible
• Solution: Floor Blokker Membrane Retrofit Layered Under New Hardwood
• Outcome: Airborne and Impact Noise Cut, Event Floor Returned to Service

Mixed-use commercial buildings stack incompatible noise profiles on top of each other. Ground-floor commercial kitchens, food halls, and back-of-house operations generate constant low-frequency rumble, hood noise, equipment cycling, and impact from pots and prep work. Second-floor event spaces need a quiet floor and a clean ambient noise floor for guests to enjoy a function.

The original floor assembly at Armature Works was not designed with that vertical separation in mind. The building was a restored former industrial facility, which means most of the existing structure carried sound rather than blocking it. Sound from the kitchen and food hall below was bleeding straight up into the event floor, generating noise complaints during paid events.

Both axes had to be addressed. Airborne noise (voices, music, hood fans) and impact noise (footfall, equipment, dropped items) both move vertically through a floor assembly. The deeper read on the difference lives in our airborne vs structure-borne noise guide.

• Active Operations: Kitchen and Food Hall Could Not Be Closed
• Existing Structure: Floor Joists, Subfloor, and Ceiling Below All Stayed in Place
• Scope of Work: Treatment Layered on Top of the Existing Subfloor
• Finished Surface: New Hardwood Flooring Installed Over the Membrane

Retrofit work has different rules than ground-up construction. Tearing out an existing floor-ceiling assembly to add a decoupled ceiling below or a floating floor above is the highest-performance option, but it forces operations to close and shifts the cost from product to labor and time. Most active commercial buildings cannot tolerate that downtime.

A surface-layered membrane retrofit installs on top of the existing subfloor and adds a new finished floor above it. The kitchen below stays open. The event floor closes briefly for the install and reopens with a quieter assembly than it had before. The performance ceiling is lower than a full demo and rebuild, but the cost ratio is dramatically better for an active building.

For a sister project that ran the same Floor Blokker product in a residential multi-family vertical instead of a commercial mixed-use one, see the multi-family soundproofing underlayment case study.

• Membrane: Floor Blokker Mass-Loaded Sound Barrier
• Decoupling Layer: EVA Foam Above the Mass-Loaded Membrane
• Adhesive: Two-Pass Spray Adhesive (Below Floor Blokker, Below EVA)
• Perimeter Seal: Acoustic Caulk on Existing Subfloor Edges
• Finish: New Hardwood Flooring Above the Full Stack

Floor Blokker is a mass-loaded barrier engineered to add transmission loss to a floor assembly without adding height the way a full floating-floor system would. The mass blocks airborne noise. The EVA foam layer above the membrane decouples the new hardwood from the membrane below, which is what handles impact noise.

The product page with full spec data lives at Floor Blokker acoustic underlayment, including the rated airborne and impact reductions for a typical assembly.

Acoustic caulk on the perimeter is the unsexy but critical step. Sound finds the smallest gap and flanks around the membrane. Sealing the existing subfloor edges before any membrane goes down keeps the airborne path closed. Skipping this step is the most common reason a retrofit underperforms its rated transmission loss.

1. Clean and Prep Subfloor: Strip the existing surface to clean substrate
2. Perimeter Caulk: Run acoustic caulk along the wall edges
3. First Adhesive Pass: Spray adhesive across the full subfloor area
4. Lay Floor Blokker: Roll out and tape down the mass-loaded membrane
5. Second Adhesive Pass: Spray adhesive over the membrane surface
6. Lay EVA Foam: Install the decoupling layer above the membrane
7. Finish Floor: Install hardwood over the full membrane assembly

Sequence matters more than any single step. Putting the EVA below the membrane instead of above it inverts the decoupling logic and cuts impact performance. Skipping the second adhesive pass leaves the EVA loose under the hardwood, which lets the finished floor squeak as it moves against the foam.

For a deeper walkthrough of the general principles behind any floor soundproofing retrofit, see our how to soundproof a floor guide.

Between-floor membrane retrofit targets shift with what is happening above and below the assembly. Mixed-use commercial verticals with a kitchen below need the most isolation. Office-over-office stacks need the least. The table below maps the working windows across four common retrofit scenarios.

The Armature Works retrofit landed in the event-above-kitchen row, which is the most demanding window of the four. The Floor Blokker plus EVA plus hardwood stack delivered enough airborne and impact reduction for the event floor to host paid functions without bleed-through complaints from below.

Retrofit soundproofing between floors is the practical alternative to demolishing and rebuilding a floor-ceiling assembly inside an active commercial building. A mass-loaded membrane plus an EVA decoupling layer plus a new finished floor delivers most of the transmission-loss benefit without the downtime or budget of a full demo. More on the team behind retrofit soundproofing for operators scoping similar work.