RESONAC is an efficient panel damping material, extremely effective in the suppression of vibration and vibration generated noise. Resonac meets the requirements of Class "0" Fire Propagation over non-combustible substrates to the 1991 Building Regulations. In addition, RESONAC has low smoke and toxic fume emission and suitable for use on steel, stainless steel, aluminium and enamel panels used for example in tunnels, underground stations, lift carriages, on metal roofing sheet and in passenger carrying vehicles eg, buses, trains and boats.
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The water-based viscoelastic compound is lightweight and easily applied using spray equipment or trowel on metal panels with complex shapes and profiles.
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PREVIEW
It has always been a challenge to reduce rain impact noise for metal roofs. Over the decade, many institutional building such as schools, colleges and performing spaces which utilizes the metal roofing has faced the intrusion of overwhelming rain impact noise during heavy downpour.
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In recent years, various noise control solutions have been proposed to reduce the transmission of rain impact noise through metal deck roof. Many involve adding layers of hardboard material to the basic metal deck roofing system to enhance the transmission loss properties. No doubt such solution provides significant relief to the rain noise problem, but at what costs? Also, what about the radiated noise to adjacent properties caused rain impact on the roofing sheet?
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CONVENTIONAL RAIN NOISE TREATMENT
Using conventional method to treat rain impact noise is straightforward; by adding thicker and higher density board materials. The result is apparent but the costs can be very high.
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HIGHER CONSTRUCTION COSTS
Conventional rain noise treatment typically requires additional supporting structures for the extra weight imposed by the additional board materials, which in turn increases construction costs for having bigger structural columns and beams. In addition, more time, which is always critical in construction projects, is required to build such extensive system. Any delay in constructing the metal roofing as a result of such extensive design will hold back the rest of the building trades as weather tight condition is necessary before interior fitouts and installation can proceed.
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QUALITY OF WORKS
The integrity of sound insulation performance of sandwiched panel system is highly dependent on the joints of the insulation boards. Such conformance cannot be easily monitored due to the inaccessibility of most roofs.
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DANGER OVERHEAD
Specified spacings between purlins are sometimes not conformed to totally and such variation may mean that some of the high density insulation boards are sitting very closely to the purlin edges; any movement in the supporting member due to thermal expansion and contraction may cause the boards to fall out of place and the consequence can be disastrous.
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RADIATED NOISE NOT ARRESTED
Conventional sandwiched panel system only takes care of rain noise reduction below the metal roof. However, rain impact noise on metal roof can affect premises above the roof as well as the adjacent building.
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REVOLUTIONARY RAIN IMPACT NOISE TREATMENT
What other options do we have in rain noise reduction for metal roof? RESONAC may hold the key to alleviating the irritating rain impact noise.
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RESONAC-M is a anti-drumming compound which makes rainy day welcomed, even if you are under bare metal roof system. You have to hear the difference in sound reduction provided by RESONAC-M to appreciate the unique formulation of this viscoelastic vibration damping compound. Instead of the conventional methods of insulating metal roof with sandwiched board construction, the rain impact noise against metal roof can be treated at source by applying a thin layer of RESONAC-M. RESONAC-M outperforms other compound, reducing rain impact noise level up to 15 dB.
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The unique advantages of RESONAC-M are;
EASE-OF-USE
 
It can be spayed or rolled onto the underside of the cladding, on site or at the roof manufacturers' premises and has excellent adhesive qualities to both steel and aluminium surface. It is fast drying and cures to a hard finish. As it is water-based, it is easy to apply and clean.
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LIGHTWEIGHT
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There is little additional weight to the roof as it forms only a thin coating of 0.7mm to 1.0mm thickness.
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REDUCED RADIATED NOISE
 
As RESONAC-M adheres to the metal roofing sheet to form a monolithic coating with the steel surface, it provides effective noise reduction at source through damping the resonance of steel sheet under impact, thereby minimize the rain impact radiated sound to the surroundings.
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EXTRAS
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RESONAC-M is environmentally friendly, UV and water resistant, and is non- combustible.