How do you deal with acoustics in buildings?

Acoustics - rain impact noise

An acoustic engineer should be consulted for guidance on how to insulate building elements to achieve particular acoustic goals and to provide acoustic calculations. But here we will explain two important phenomenon that you may come across when dealing with building acoustics for particular elements: Rain Impact Noise and Airborne Sound Transmission.

Rain Impact Noise, measured in area-weighted sound intensity level LIA (dB), concerns the amount of direct impact sound transmitted from pouring rain falling onto the outside of a roof to the inside of a building. The lower the value, the better.

Airborne Sound Transmission, measured in area-weighted Sound Reduction Index Rw (dB), concerns the amount of direct sound transmitted from one room or building to another, or from outside to inside, via roofs, floors and walls. The higher the value, the better.

We’ve had a series of acoustic tests completed showing great results for rain impact noise with steel and timber deck flat roofs insulated with Kingspan Thermaroof products and Kingspan OPTIM-R Vacuum Insulation Panels. A test result of 27.5 LIA (dB) was achieved for a green roof build-up insulated with 100 mm Thermaroof TR26/TR27 LPC/FM. An assessed test result of 41.6 LIA (dB) was achieved for a metal deck flat roof build-up insulated with 100 mm Thermaroof TR27 LPC/FM.

Acoustic tests were also completed for airborne sound transmission with steel and timber deck flat roofs insulated with Thermaroof products and OPTIM-R Vacuum Insulation Panels, and also steel frame walls insulated with Kingspan Kooltherm products. A test result of 47 Rw (dB) was achieved for a metal deck flat roof build-up insulated with 150 mm Thermaroof TR26 LPC/FM. An assessed test result of 51 Rw (dB) was achieved for a metal deck flat roof build-up insulated with 60 mm Thermaroof TR26 LPC/FM. A test result of 62 Rw (dB) was achieved for a steel frame wall build-up insulated with 60 mm Kooltherm K15 Rainscreen Board.

To view more detailed results visit our website to download our acoustic technical bulletins. Advice is also available in our post which answers the question ‘what is acoustics?’

If you require further acoustic advice contact our Technical Service Department by emailing acoustics@kingspaninsulation.co.uk or calling 01544 387 382.

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Kingspan Insulation is a market leading manufacturer of optimum, premium and high performance rigid insulation products and insulated systems for building fabric and building services applications.

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