Open-cell spray foam delivers R-3.5 per inch and provides excellent air sealing and acoustic performance — making it the right choice for interior walls where noise reduction alongside thermal performance is the goal. It fills every gap and irregular void in a wall cavity, absorbing sound waves and eliminating air pathways through which both airborne noise and heat travel. For Langley strata units, secondary suites, and home offices where noise reduction matters alongside comfort, open-cell spray foam delivers meaningful results in a single application. Full application guide at westerninsulation.ca/spray-foam-insulation/