ONDULINE ROOFING SHEETS
Thermal and acoustic qualities
OFITECH for OFIC SA
35, rue Baudin
92300 LEVALLOIS PERRET
e-mail: export@ondulinecom
LL, May 2008
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Date
Thermal and Acoustic Qualities
of 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)
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Thermal conductivity λ :
(Ability of a material to conduct HEAT)
Examples (materials):
Low
•
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
High
•
Iron : 52 to 80 W/m.°C
The lower the
λ value is, the lower HEAT
conduction will be.
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Thermal conductivity of ONDULINE:
(French L.N.E certificate)
Performed
according to NF X
10-021
Test report
DMAT/1707916
λ= 0.099 W/m.°C
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Thermal conductivity λ :
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
•
Low
High
ONDULINE : 0.099 W/m.°C
ONDULINE value is very closed to λ Cork
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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)
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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………….
Warm
Cooler
(Until T1-16°C
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Thermal RESISTANCE
A building is cooler when compared to metal roof
Customers testimonies :
Outside
temperature
Onduline
=
cooler
Metal roofs
=
hotter
Thermal and acoustic Qualities
of ONDULINE sheets
SOUND Emission
2) Acoustic quality :
Acoustic attenuation : SRI
Ability of a product to reduce
SOUND transmission
Absorption
(testing)
Reception
Expressed in decibels (dB)
(insulated box)
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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)
Onduline
=
(almost) silence
Listen &
compare
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 acoustic Qualities
• Thermal conductivity : λ= 0.098 W/m.°C
Thermal resistance : R= 0,178 m²/°C.W
• Acoustic attenuation : SRI =28 dB,
(Sound Reduction Index)
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YOUR
QUESTIONS….?
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THANK YOU FOR
YOUR QUESTIONS.
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