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Soundproofing

Real acoustic isolation for home studios, media rooms, shared walls, and rental duplexes. Mass, decoupling, damping, and sealing — done right, not just thicker insulation.

Seattle Craftsmanship Since 1983

Quality Soundproofing Craftsmanship

Jensen Contracting, Inc. has been delivering soundproofing services across Seattle, Snohomish, King, and Kitsap Counties for over 40 years — with the premium materials, modern methods, and meticulous attention to detail that our neighbors keep coming back for.

We're the contractor other contractors refer to when a job gets complicated. We invite you to put us to the test.

Get A Free Estimate (425) 420-5641

Soundproofing materials — mass loaded vinyl, acoustic insulation

Real Soundproofing, Not Just More Insulation

Most "soundproofing" jobs are just more fiberglass — which addresses maybe 15% of the real problem. Stopping sound requires four principles: mass (heavy, dense materials), decoupling (isolation clips, resilient channels, double studs), damping (green glue and similar materials that convert vibration to heat), and sealing (any air gap leaks sound).

We design systems that address all four. Our projects don't just “sound quieter” — they measurably block decibels.

Every Project Starts With a Home Assessment

Before we quote a soundproofing job, we come out and listen. Where is the sound coming from? Flanking through the ceiling? Coming up through the floor? Leaking around the door? The same "soundproofed room" might need a completely different system depending on the source.

We bring experience — and honest answers. Sometimes the right solution is a $300 door upgrade; sometimes it's a proper double-wall build. We'll tell you.

Home Studios, Media Rooms & Rental Properties

Our most common soundproofing projects:

Home recording studios & podcast rooms. Real isolation — sound stays in, traffic stays out.
Media & home theater rooms. Movie nights without neighbors hearing.
Bedrooms off busy streets. Cut road noise by 60% or more with proper window and wall treatment.
Shared walls in duplexes & ADUs. Tenants on both sides actually livable.
Floors & ceilings. Critical for stacked apartments and ADU conversions.
Doors & windows. Usually the weakest link — we upgrade both.

Our Work

Recent Projects

Real Seattle-area homes, real Jensen Contracting craftsmanship.

For Rental Properties & Property Managers

If you own a duplex or ADU where tenants complain about noise, soundproofing is often cheaper than a vacant unit. We've retrofitted dozens of Seattle rentals — quietly, cleanly, and with minimal disruption to tenants on the other side.

Minimal tenant disruption. Work staged to one room at a time where possible.
Code-compliant assemblies. STC-rated assemblies that satisfy Seattle building code.
Written performance goals. We target specific STC improvement, not just "better."

Ready to Build Something Right?

Call us or request an estimate online. We'll visit your home, scope the work, and send you a clear written quote.

Get A Free Estimate (425) 420-5641