TagSound Insulation(120)

A presentation slide (page 11) summarizing field assessment findings related to window installation and maintenance issues, including screws at sill bottoms promoting water damage, caulked-over weepholes, and design factors affecting longevity and repairability. Specific concerns noted include non-removeable storm panels on fixed picture windows and inability to clean windows with moving sashes.

A presentation slide summarizing field assessment findings for a noise insulation or mitigation program. Key findings include operational and appearance issues with windows (locking, condensation, seal failures, mold), absence of entry doors in port-sponsored installations, and ventilation via non-mechanical vents or fresh air intakes.

A presentation slide states that third-party consultants conducted field assessment and acoustic testing concurrently at 30 homes over a two-week period beginning August 19, 2024. The 30 homes were selected to reflect the distribution of manufacturers by year for sound insulation packages installed between 1986 and 2014.

Slide 8 from a Port of Seattle / ESA 2024 report presents two tables summarizing 1,067 survey responses about sound insulation packages installed at Sea-Tac Airport. The left table compares response distribution by manufacturer (e.g., Alpine STC44 leading at 21.1%), while the right table breaks down installations by year, with Pre-1993 representing the largest share at 21.4% of survey responses, out of a total program baseline of 3,200 packages.

Slide 7 from a Sea-Tac Airport presentation titled 'Survey Overview and Results (cont.)' showing a geographic map of properties around Seattle-Tacoma International Airport color-coded by sound mitigation contractor (Other, Milgard, Alpine, CDI/Peerless/Devac). The map is dated September 2022 and includes a note directing homeowners to contact the Noise Programs office at 206-787-5393 to determine eligibility for sound mitigation programs.

A presentation slide titled 'Survey Overview and Results (cont.)' reporting 1,067 survey responses (over 33% response rate), with operational concerns ranging from 60–75% and glass-related concerns from 50–72% depending on product. The slide concludes that overall age and design of the finished product—not the specific year or product installed—are the key factors driving residential concerns.

Commission Order 2024-04 directs the Port of Seattle to conduct an assessment of the effectiveness of previously installed Port-funded noise insulation packages, to be completed by end of 2024, involving outreach and data collection from property owners. The order authorized a tax levy-funded budget of $6.5 million, with $5 million set aside for design and construction associated with a Pilot Program.

Presentation slide titled 'Assessment Key Findings' summarizing results of a sound insulation assessment: 99% of products installed prior to 2014 are past their expected useful life, lack of replacement parts limits resident maintenance, and all tested homes (including five Pre-1993) measured under 45dB DNL interior, with sound insulation packages deemed acoustically effective despite operational and appearance concerns.

A Port of Seattle presentation slide dated February 26, 2025, providing an update on the Sound Insulation Repair and Replacement Pilot Program. The slide features a photograph of a residential home at address 12036, illustrating a property subject to the airport noise insulation program near Sea-Tac Airport.

Slide 14 of a presentation on acoustic testing for a Sea-Tac Airport noise insulation program, explaining that interior DNL (calculated as Exterior DNL minus Noise Level Reduction) is the eligibility metric, with a threshold of 45dB DNL. All 30 homes tested fell below the FAA's 45dB DNL interior noise threshold, including five Pre-1993 homes evaluated under the FAA re-insulation program.