DECIDAMP? SP80 ATTENUATION OF RAIN NOISE ON METAL ROOFING

THE CHALLENGES

Metal roofing is a popular construction material in many parts of the world, for both residential and commercial buildings and is utilised in many other industrial applications. With a variety of benefits one disadvantage is its tendency to exhibit excessive noise during events of rainfall. This is primarily due to the minimal internal damping of metal roofing. The net effect is an increase of the noise level experienced within the interior of the building, particularly in the case of high rainfall rates, this can reduce speech intelligibility and cause disruption to activities such as sleep or any task which requires concentration. Introducing an effective damping compound to highly resonant metal roofing results in the structure being less prone to excitation from rainfall impact, leading to reduction in airborne noise. Decidamp? SP80 has been specifically developed for building and construction use. It is water-based, easily sprayable and exhibits a high damping loss factor. It was tested on performance in this scenario when applied onto the rear side of the roofing panels at a dry film thickness of 1 mm.

THE SOLUTION

The test results revealed that Decidamp? SP80 is highly effective in reducing rainfall noise and increasing transmission loss of metal roofing. With minimum treatment sound intensity has been reduced by 10-11 dB and transmission noise (Rw) improved by 5-6 points. Decidamp? SP80 is a viable solution on its own or as an element of a more comprehensive system when attenuating rainfall noise on metal roofing.

TESTING SUMMARY

COLORBOND?, 0.42 mm corrugated steel.

COLORBOND? Ultra, 0.48 mm corrugated steel.

Lysaght Custom Orb design, (a sinusoidal wave pattern with rib depth of 16 mm.)

Independent testing was conducted to ISO 10140-5 at the University of Auckland. Improvement was recorded over the entire measured frequency spectrum across all results for both airborne and rainfall noise insulation.

For more information on this testing and the full report visit: https://www.pyrotek.com/DeliverFile/fcddf90f89c9c3fba0fbf8071e2c30df

For more information on acoustic and thermal solutions for your project, please contact us or visit?www.pyroteknc.com.