roof insulation - green buildings

HOLISTIC APPROACH TO CREATE ENERGY EFFICIENT BUILDING

insulationofroof — Sat, 30 May 2009 08:37:23 +0000

1. Salient Features of Treatment:

Environmental Friendly
Energy Saving
Dead Weight Reduction
Long Lasting
No Heat Transmission to Surroundings

2. Why Insulate

Heating & Cooling (Space Conditioning) account for 50% to 70% of the total energy used in a typical commercial establishment.
On the other hand, lighting and appliances and everything else account for 10% to 30% of the energy used in most buildings.
Inadequate insulation and air leakages are leading causes of energy waste.
Insulation saves money and energy resources

3. Thermal Insulation of Roofs:

Conventional Method of Thermal Insulation:

Under Deck Thermal Insulation:

DISADVANTAGES

Scheme allows heat energy to be absorbed by top deck. This hot mass of concrete radiates heat in the environment.
Waterproofing not available.

Method Proposed:

Over the Deck Thermal Insulation.
Thermal Insulation ensures negligible heat absorption by Deck.
Materials have good bonding and excellent water resistance.
Light Weight Materials

Insuplast is mineral based, over deck roof insulation, which helps decrease the flow of heat to the interiors. With Insuplast Roof Insulation, the RCC/roof slab is not allowed to absorb heat, even during the hottest summer days, keeping indoor temperatures within a comfortable range.

Applying Insuplast guarantees a temperature difference of upto 7 to 10 degrees compared to the external temperature. What’s more, this in turn helps reduce a minimum of 25% of your total power consumption in a year.

Insuplast Roof Insulation is a brownish, flaky, light weight material a natural mineral that is exfoliated to obtain high insulation properties. The product is extremely light and its supplied density is 220kg/m3. Insuplast also is totally non-toxic, eco friendly and retains insulation properties for lifetime.

4. Solution must incorporate:

Gradient for bailing out rain water.
Thermal Insulation.

SOURCES OF HEAT TRANSFER

insulationofroof — Sat, 30 May 2009 08:19:41 +0000

Roof Decks: The upper roof surface is exposed for the longest duration directly to almost intense perpendicular solar heat radiation. The heat accumulated on the roofing material is transmitted gradually through the roof into the rooms below and keeps transmitting the heat accumulated in the roof during the day even after the sunsets. Incase we insulate the roof top, we stop accumulation of heat on roof and its transmission in to the rooms below, thus bringing the temperatures in the rooms significantly down. This reduces period of use of cooling devices such as coolers and Air Conditioners, thus saving in energy costs.

Wall: • Walls, specially west facing walls, cause transfer of heat in summers from outside.

Glass Windows/Doors/Panels: • These are also a major source of heat transfer from outside into building.

ADVANTAGES OF THERMAL INSULATION

insulationofroof — Sat, 30 May 2009 08:17:04 +0000

Due to thermal insulation, the room remains cooler in summer and warmer in winter than outside. Hence, a room provided with thermal insulation gives comfort both in summer and winter.
Energy Saving: Due to thermal insulation transfer of heat between inside and outside of the room is restricted. This results in less quantity of energy required for maintaining the desired temperature in the room.
Prevention of thermal stress on roofs. Due to thermal stresses, roof decks tend to crack. These would be reduced to a great extent.
Generally over-the-deck insulation materials are much lighter than the currently used brickbat coba or concrete, resulting in reduced deadweight on the roof slab.
Non-Toxic, Environmental friendly solutions.
Energy saving resulting in reduced costs of
1. Running cost of Air-conditioning.
2. Capital equipment cost reduction.
No Heat absorption and subsequent dissipation.
Can avoid Expansion Joints.
Temperature drop of 5oC to 10oC depending on outside Temperature.
Composite approach to:

Thermal Insulation.
Waterproofing
Slope Creation.

GREEN BUILDINGS – NEED OF THE HOUR

insulationofroof — Sat, 30 May 2009 08:07:13 +0000

Today’s modern buildings are no doubt a marvel in terms of architecture and technology, but have also led to an adverse impact on the environment. The new-age buildings account for 12% of water usage, 30% of green house gas (GHG) emissions, 65% of waste output and 70% of electrical consumption.

In contrast, ‘Green’ buildings are eco friendly and can contribute towards a cleaner environment by reducing the amount of energy used to light, heat, cool and operate buildings and GHG and other harmful emissions.

Recognising the need for green buildings, several individuals as well as organizations are making efforts towards increasing the awareness of their importance and the challenges that need to be tackled.

A building’s initial construction cost may represent only 20 – 30% of its building’s entire useful life costs. Usually, the cost of constructing green buildings is higher by 15 – 20%, but they save around 30% on energy usage annually. Hence, there is a need to create awareness about not only the ‘First’ cost, but also year – to – year operating costs for any project. Builders as well as users should remember that life cycle benefits of a Green design more than make up for the additional initial costs. In order to appreciate the cost effectiveness of green buildings over a period of time, adopting the practice of separating capital and operating cost is necessary.

Insuplast – an excellent material to keep your indoors COOL

insulationofroof — Sat, 30 May 2009 07:59:48 +0000

Insuplast is a mineral based, over deck roof insulation, which helps decrease the flow of heat to the interiors. With Insuplast Roof Insulation, the RCC/roof slab is not allowed to absorb heat, even during the hottest summer days, keeping indoor temperatures within a comfortable range.

Choosing the right material for roof insulation

insulationofroof — Sat, 30 May 2009 07:57:43 +0000

Choosing the right material:

The over deck insulation material should have adequate compression resistance, low water absorption, resistance to high ambient temperature and low thermal conductivity which can be measured in terms of u values and R values. This can be carried out by either preformed insulation material or insitu application.

In over deck roof insulation Exfoliated Vermiculite remains one of the most trusted thermal barriers. Vermiculite loose fill masonry insulation is an inert, inorganic, lightweight granular material that can be been treated for water repellency. It is non-flammable, non-combustible, economical, and does not emit odors, toxic fumes, or attract vermin. It will not deteriorate or decompose through its lifetime and since it is simply installed it is one of the easiest means of providing a barrier against the transmission of heat, sound, and moisture.

Thermal Insulation a key to making building green

insulationofroof — Sat, 30 May 2009 07:55:20 +0000

Thermal Insulation a key to Making Buildings Green

Buildings are responsible for more than half of harmful greenhouse gas emissions in most major cities of the world. Large organizations across the globe today are working on programs that bring together banks, energy services companies, cities, and building owners to perform energy efficiency retrofits that guarantee energy and cost-savings.

Thermal Insualtion of buildings has become one of the key practices across the globe to effectively manage heat incidence in the buildings. With the right materials used as thermal barriers in buildings it has helped reduce energy consumptions having a deep impact on the environment as a whole.

Application:

The roofs of buildings receive the thrust of heat during the day. The construction practices adopted in the country mainly involve reinforced cement concrete (RCC) as the roofing element which is noted for its high thermal conductivity. If the roof can be protected from heat incidence, the conditions down below can be controlled to a great extent. When buildings are air-conditioned, the purpose of the system is to maintain a lower temperature than ambient inside the building. If the roof is exposed to solar heat, it will input continuous heat inside the building, which in turn will add to the A.C. machinery load.

Thermal barrier provided in buildings are generally installed in two ways – Over deck and under deck Insulation:

With over-deck thermal insulation, a thermal barrier or insulation is provided over the RCC so that the heat of the sun is not allowed to touch the RCC slab of the roof at all. In this way we can preserve the RCC from getting heated up. Once the RCC is heated up, there is no other way for the heat to escape other than inside the building. The other method is using thermal insulation under the roof by using methods like false ceiling or extruded polystyrene. However the effectiveness of under deck insulation is always a question as since the thermal barrier is provided under the RCC, some heat passes through it and heats up the ambience of the room. This decreases the comfort level of the room and if the building is centrally air-conditioned, increases the AC load. Hence it can safely be concluded that over deck insulation has its own advantages against under deck.