Heat insulated metal roofing and cladding sheets

NOISE REDUCTION

The roof of a building is an important part of the building. Defended and insulated against external noise. METAhybrid® Heat insulated metal roofing and cladding sheets technology means that 4 or 5 tenths of metal can be improved by 6 mm of high-density sound insulation, adhering perfectly to the sheet (aluminium, pre-painted steel, etc.).
We can have a sound insulated metal roof that decreases the impact of rain, hailstorm, METAhybrid® will not vibrate thus there is no diapason effect. This gives a padded emission quite similar to brick roofs. In fact, to absorb noise, a roofing packet consisting of components with different physical characteristics.
Significant noise coming from direct impact (noises transmitted by air), which can be easily transmitted to underlying premises and thus increase discomfort. METAhybrid® mass insulation reduce such effect.
The size of a hailstone is generally 0.5 to 2 cm in diameter and the effects it can have when impacting a roof depends on the material used. Brick roofs, for example, are hard but unable to absorb the impact, becoming fragile to later crack and break resulting in leakage. On the other hand, metal roofs are malleable but do not break and, absorb the impact, are dented but do not lose their weatherproof function. The monolithic high density expanded insulating layer, adhering perfectly to the METAhybrid ®, participates in absorbing the impact.
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METAhybrid Thermal Insulated metal roofing sheets

Condensation Effect Reduction

Condensation in metal sheds is a very commonly reported problem resulting in the damp atmosphere and rust forming. The inside of the roof runs with water which creates a damp atmosphere that is bad for the items stored in roof sheds. Tools and machinery go rusty, fabric and food items become mildewed. METAhybrid® is most useful in such condition.
 METAhybrid® Heat insulated metal roofing and cladding sheets in winter preserves thermal insulation and keeping the roof dry sweeping away any condensation phenomenon. Heat filtered through METAhybrid® prevents direct contact between steam and “naked” sheet, limiting condensation appearance.
In the composite METAhybrid® Heat insulated metal roofing and cladding sheets  system with foam insulation element has different functions. The most important is to limit the condensation effect. The solution to this problem is given by the fact that the layer of foam insulation inside the roof (with a high thermal inertia function) interrupts contact between the inside environment and the external roofing sheet, preventing steam from coming into contact with a cold surface and condensing reducing condensation.
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Heat insulated metal roofing and cladding sheets

Heat insulated metal roofing and cladding sheets​

 Heat insulated metal roofing and cladding sheets is common knowledge that a metal roof exposed to the sun’s rays gets hot. Thermal insulated roof buildings is an important factor to achieve thermal comfort, thermal roof insulation interrupt the heat flow, heat barrier material blocks the inflow of the radiant heat from the roof surface and reduces temperature and give better thermal resistance. consequently, this insulating layer is able to give a much better result
 
 Constant air circulation removes heat transmitted through the roof. Thermal Insulated layer on the inner surface of roof reduces transmission of heat through sheet helping inside occupant and better level of living comfort.
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Heat insulated metal roofing and cladding sheets

EXCELLENT walkability

Impact resistance for metal roof shed helps in reducing vibration caused by industrial activity. If just metal sheets are used on the roof they often come up against difficulties in guaranteeing good walkability resistance.
A metal roof must guarantee treadability also over time to allow correct maintenance, necessary to ensure a long life of the roof. Using some “softer” materials often increases the risk of denting which, even if these dents do not undermine the functionality of the roofing system itself, they do create permanent roof flaws. The answer to this important problem is to increase walking surface “consistency”: this can be done by increasing its thickness, of the roofing sheet or coupling it with another material to form one whole system with a specific consistency. METAhybrid® Heat insulated metal roofing and cladding sheets  have a system with an intermediate layer of insulation which provides impact resistance and good walkability with the advantage of 295mm valley profile.
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Heat insulated metal roofing and cladding sheets

Thermal bridge elimination

It  is important in metal structures to isolate the roof sheet from the underlying metal structure. By using METAhybrid®  Heat insulated metal roofing and cladding sheets     with its protective layer covering the roof sheet at the intrados, the head load that bears on the surface of the roof sheet is reduced by about 25% and attenuates heat bridges noticeably, constituting a barrier to heat dispersion. This phenomenon happens when in the presence of electrolytic solutions, two different metals are in contact with each other and a “potential” difference occurs between them.

The conduct of the two metals is that of a battery with one metal acting as an anode and the other as a cathode which, over time, leads to a more or less pronounced dissolution of the anodic part. This type of corrosion is known by the name of “galvanic corrosion”. Any kind of contact between the sheet and the underlying structure can be avoided by applying a Galvanic couples elimination

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Heat insulated metal roofing and cladding sheets

Thermal mass and Conduction​

when outside temperatures are fluctuating throughout the day.it is important to have good insulating material below roof sheet METAhybrid®  Heat insulated metal roofing and cladding sheets  with high-density insulating material gives better thermal mass insulation
Heat energy is passed through roof sheets from molecule to molecule in a material. In order for the heat to be conducted, there should be physical contact between particles and some temperature difference.to minimize this phenomenon METAhybrid® insulation material with aluminium foil act as the barrier to direct heat coming from the rooftop.
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Product Specification

Heat insulated metal roofing and cladding sheets
Metahybrid Profile

 METAhybrid® Heat insulated metal roofing and cladding sheets are under-deck multilayer thermal insulated colour coated metal sheet. Top profile sheet Hot dip galvanized in  CRCA steel confirming to IS 513 with zinc coating as per IS 277 with specially formulated and applied with chemical conversion coating followed by 5 to 7 micron epoxy primer coating on both top and back surfaces and finished top coatof 20micron (DFT) on exposed surface and 5 micron (DFT) on unexposed surface. Thickness 0.50mm (TCT) with profile dimensions  355mm Pitch ,crest height 28mm with cover width of 1060mm, Intermediate layer of close cell 6.00mm insulation with bottom side Aluminum foil.  

Heat insulated metal roofing and cladding sheets
Metahybrid Profile

No.

Characteristic

Test Result

Method

1

Density

30-40 Kg/m3

ISO 845 1988 (E)

2

Reflectivity

0.97

ASTM E408

3

Emissivity Aluminium Foil

0.03

ASTM C1371

4

UV Resistance

Excellent

5

Chemical Resistance

Excellent with AI Foil

ASTM D-543/BS 4618

6

Temperature Range

-80 C to + 90 C

7

Flexibility

Excellent

BS4433

8

Heat Resistance (R-Value)

3.0m3 C/W

ASTM C236

9

Thermal Conductivity

0.030 Kcal/m3

ASTM C-177

10

Water absorption

<2%

ASTM D 1056 -98

11

Flammability

HF-1

UL-94

 12

Water Vapour permeance (28 days)

<6×103 ng

 

ASTM E-96

13

Tensile Strength (N/m2)

Min 25

BS 4370 Part 2

14

Dimension Stability

No Visible Changes observed

BS 4370 Part 1

 

15

Fire characteristic

a)      Surface spread of flame   Class 1

BS 476 Part 7

 

 

b)      Fire Propagation                    Class 0                  

BS 476 Part 6

 

 

(For both plain and foil faced material)

 

16

Colour

Grey

 

Note:- Please refer the above data for guidance purpose only and may contact geometric steels office for further information .

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