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ONDULINE ROOFING SHEETS Thermal and acoustic qualities. OFITECH for OFIC SA 35, rue Baudin 92300 LEVALLOIS PERRET e-mail: export@ondulinecom LL, May 2008. Thermal and Acoustic Qualities of ONDULINE sheets. Heat Flow. Warm. Cold. 1) Thermal qualities : Thermal conductivity : λ
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ONDULINE ROOFING SHEETS Thermal and acoustic qualities OFITECH for OFIC SA 35, rue Baudin 92300 LEVALLOIS PERRET e-mail: export@ondulinecom LL, May 2008
Thermal and AcousticQualitiesof ONDULINE sheets Heat Flow Warm Cold 1) Thermal qualities : • Thermal conductivity : λ Ability of a material to conduct HEAT • Thermal resistance : R Ability of a product to reduce HEAT conduction (most of the time heat transmission coefficient K=1/R is recorded)
Thermalconductivityλ : (Ability of a material to conduct HEAT) • Examples (materials): • Expansed Polystyrène : 0.034 W/m.°C • Cork : 0.1 W/m.°C • Bitumen : 0.17 W/m.°C • Wood (pin): 0.36 W/m.°C • Fiber cement : 0.95 W/m.°C • Brick (Clay) : 1.15 W/m.°C • Reinforced concrete : 1.75 W/m.°C • Iron : 52 to 80 W/m.°C Low High The lower the λvalue is, the lower HEAT conduction will be. 3 3 3
Thermalconductivity of ONDULINE:(French L.N.E certificate) Performed according to NF X 10-021 Test report DMAT/1707916 λ= 0.099 W/m.°C
Thermalconductivityλ : • Examples (materials): • Expansed Polystyrène : 0.034 W/m.°C • Cork : 0.1 W/m.°C • Bitumen : 0.17 W/m.°C • Wood : 0.36 W/m.°C • Fibre cement : 0.95 W/m.°C • Brick (Clay) : 1.15 W/m.°C • Reinforced concrete : 1.75 W/m.°C • Iron : 52 to 80 W/m.°C • ONDULINE : 0.099 W/m.°C Low High ONDULINEvalue is very closed to λCork 5 5 5
Thermal RESISTANCE R : Performed on the product Thermal Insulation test performed by Sirim QAS International Sdn Bhd Test method: ISO 8990:1994 Test report: 2004CB1300 Date: 23 August 2004 (Onduline sheet) 6 6 6
Resistance of Heat Transmission R Official laboratory test: 16°C cooler 16°C difference between high and low temperature rooms R= 0.178 m².°C/W K= 1/R=5.6 W/m².°C Thermal Insulation test performed by Sirim QAS International Sdn Bhd Test method: ISO 8990:1994 Test report: 2004CB1300 Date: 23 August 2004
Thermal RESISTANCE • Examples or equivalent : • ONDULINE sheet R=0.178 m².°C/W • is equivalent to : • ~ 2 cm of cork • ~ 7 cm of wood • ~ 21 cm of bricks (clay) • ~ 32 cm of concrete • Etc…………. Cooler (Until T1-16°C) Warm 8 8 8
Thermal RESISTANCE A building is coolerwhen compared to metal roof Customers testimonies : Outside temperature Onduline = cooler Metal roofs = hotter
Thermal and acousticQualitiesof ONDULINE sheets SOUND Emission 2) Acousticquality : Acousticattenuation : SRI Ability of a product to reduce SOUND transmission Expressed in decibels (dB) Absorption (testing) Reception (insulated box)
Comfort Roof - Sound Absorption (3) Noise reduction SRI=28 dB Performed according to BS EN 20354. Test report N°C/95/CL/1896/1
Comfort Roof – Impact noise Absorption Your building remains silent under tropical rain Customers testimonies : Rainfall (shower) Listen & compare Onduline = (almost) silence Metal roof = noise
Comfort Roof - Impact noise Absorption No “drumming” effect at all under tropical rain Onduline material being 3mm thick and relatively soft, sound of tropical rain is greatly reduced; there is no “drumming” effect at all
Thermal and acousticQualities • Thermal conductivity :λ= 0.098 W/m.°C Thermal resistance : R= 0,178 m²/°C.W • Acoustic attenuation :SRI =28 dB, (Sound Reduction Index)
