Greencor. Consider it as a marvel of geo-engineering

Steven ChuObama’s former Energy Secretary & Nobel Prize Winner pioneered the study of Urban Heat Islands (UHIs).

Some people believe that nuclear power is the answer to climate change, others have proposed green technologies such as wind or solar power, but Barack Obama's top man on global warming has suggested something far simpler

White roofs or Grey roofs
Not Green, Blue, Red or Yellow Roofs...

Steven Chu, the former US Secretary of Energy and a Nobel prize-winning scientist, said that making roofs white or natural grey shade would help to reduce global warming by both conserving energy and reflecting sunlight back into space

White and natural grey roofs have a dramatic impact on the amount of energy used to keep buildings comfortable, as well as directly offsetting global warming by increasing the reflectivity of the Earth.

“If that building is air-conditioned, it's going to be a lot cooler, it can use 10 or 15 percentage less electricity, You change the albedo of the Earth – and make it more reflective. So the sunlight comes down and it actually goes back up – there is no greenhouse effect.” Steven Chu


Average temperature on a hot summer day will be seven degrees warmer in urban areas that surrounding rural areas.

Roofing takes up a lot of surface area in urban areas, but roofing is not often considered a source of urban heat because it is “out of sight, out of mind.” Yet colored roofing accounts for 38%, or almost three degrees, of the seven degree difference associated with UHIs

Installation of Greencor roofing during initial construction or when re-roofing, offers immediate benefits, not only toward mitigation of UHIs but also as energy savings.

A mainly financial Life Cycle Analysis (LCA) approach for comparing roof systems might consider the following:

  • Installation – product cost, installation costs, tear-off costs, disposal costs, business disruption costs.
  • Long Term Durability – routine maintenance costs, roof replacement costs.
  • Repairs – roof repair costs, interior damage repair costs.
  • Energy Savings – estimated savings, rebates and incentives.
  • Warranty – cost premiums.
“White or Grey roofs will help cool the world, simply by reflecting the sun’s energy back to the atmosphere, thereby mitigating global warming. World-wide use of reflective roofing will produce a global cooling effect equivalent to offsetting 24 gigatons of CO2 over the lifetime of the roofs. This equates to $600 billion in savings from CO2 emissions reduction”. Lawrence Berkeley National Laboratory Study.

Greencor reduces global warming


Properties Metal Sheets Greencor Sheets Inference
Material Galvanised Iron Cement, Fly Ash, Synthetic Fibre Greencor ensures zero maintenance Resistance to natural weathering / corrosion
Sound High Noise Pollution Zero Noise Pollution Greencor ensures calm and quiet environment
Heat Difference (0oC) Absorbs heat, hence warmer Keeps the interior 5oC cooler in summer and warmer in winter Greencor reduces and keeps internal temperature cooler than ambient temperature.
Lightning and Power Conducts & Affects Does not conduct and affect Greencor is unaffected by lightning and live power wire hence ensures a safe environment.
Thermal Conductivity (λ)(ASTM C177) 20 W/mK 0.18 W/mK Greencor has very low thermal conductivity property which results in lower conductance of heat or cold. This results in better living environment.
Load Bearing Strength -- 3300 N/m Greencor has excellent load bearing strength
Non- combustibility Poor Excellent Greencor is non-combustible / Fire resistant
Life 8 Years 40 Years Greencor is more durable when compared to all metal sheets Metal sheets tend to corrode and rust.
Chemical Resistance Poor Excellent Greencor has excellent chemical resistance.
Vapour Permeability Poor Good Greencor prevents condensation because of breathability.
Deform Stability Satisfactory Good Satisfactory
*Tested at RIL R&D lab under specific conditions


Urban Heat Island Mitigation

Cities can be 2° to 8°F warmer than surrounding areas due to dark materials, roads and roofs including roofs, which absorb the sun’s light energy as heat during the day and release it at night as heat. This phenomenon prevents air from cooling down at night and results in higher temperatures being maintained longer. By immediately reflecting solar radiation back into the atmosphere and re-emitting some portion of it as infrared light, Roofs like Greencor result in cooler air temperatures for urban environments.

Reduced Smog

Greencor roofs, through mitigation of the urban heat island effect reduce ambient air temperatures, and improve air quality. Smog is created by photochemical reactions of air pollutants and these reactions increase at higher temperatures. Therefore, by reducing the air temperature, Greencor roofs decrease the rate of smog formation.

Public Health Benefits

Lower ambient air temperatures and the subsequent improved air quality also results in a reduction in heat-related and smog-related health issues, including heat stroke and asthma and worker productivity.

Peak Energy Savings and Grid Stability

Because Greencor Roofs reduce air-conditioning use during the day’s hottest periods, the associated energy savings occur when the demand for electricity is at its peak. Therefore, Greencor roofs reduce stress on the energy grid during hot summer months and help avoid shortages that can cause blackouts or brownouts.

Secondary Energy   Benefits

Greencor roofs directly reduce air conditioning use for buildings by reducing heat gain in the building below, but they also indirectly reduce air conditioning use in urban areas by helping lower ambient air temperatures. Cooler daytime temperatures mean that buildings use less air conditioning. In turn, this results in a reduction in the CO2 emissions from electricity generating power plants.

A Commercial Roofing System Solution

Up-front cost is often perceived as the key factor in choosing a roofing system. However, the life cycle cost is the more important financial aspect that needs to be investigated. Considerations should include: tear-off, maintenance expenses, energy savings, additional warranty cost, and fast, non-disruptive installations.

The profitability of high performance design must be considered for the entire life-cycle of a building, not simply the initial cost of construction.

Installing Contractors

Smart Build Roofing contractors are trained and authorized by the manufacturer to ensure that quality is kept at the highest level.

Ramco Greencor conforms to
IS 14871:2000

Length (m) 1.5, 1.75, 2.0, 2.75, 3.0 +/- 10
Width (mm) 1050 +10, -5
Laid Width (half corrugation) 1010 +10, -5
Pitch (mm) 146 +6, -2
Depth (mm) 48 +3, -5
Thickness (mm) 6 ± 10%
Out of squareness of sheets (mm) Less than 10 N/A
Sheet weight (Kg/m) 13.1 ---
Number of corrugation 7 Nil
  Weight of 100m2 as laid*  
a) With 3 m sheet 1.42 Tonnes ---
b) With 1.5 m sheet 1.52 Tonnes

Installation Specifications

Side Lap (min) 40 mm
End Lap (min) (for lower slopes use lap sealants or increase end laps) 150 mm
Actual Cover of 3 m sheet as Laid (allowing for loss by side lap of 40 mm and end lap 150 mm) 2.55 sq.m
Sheeting require of 100 sq.m as Laid
a) using 3 m sheets with side and end lap loss 109.38 sq.m
b) using 1.5 m sheets with side and end lap loss 115.51 sq.m
Purlin Spacing for Side Cladding 1400 mm
Runner Spacing for Side Cladding 1700 mm
Maximum free over at Eaves 300 mm


Greencor sheets must be lifted at both ends
Greencor sheets must be stored on a dry, smooth and stable platform
Greencor sheets must be stored to maxium number of 40 per stack height

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