GP-09 - Green Building

8/13/2019 GP-09 - Green Building

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GREEN BUILDING

Green building (also known as green

construction or sustainable building)



DESIGN AND CONSTRUCTION OF ENERGY

EFFICIENT AND ZERO ENERGY HOMES

Goal is to design and build homes that reduce or

eliminate your need for energy.

Freeing you from the grasp of big energy

companies.

Take a look at some of the innovative ways we

have come up with.



THE COMMON OBJECTIVE

Is that green buildings are designed to reduce the

overall impact of the built environment on human

health and the natural environment by:

Efficiently using energy, water, and other resources

Protecting occupant health and improving employee

productivity

Reducing waste, pollution and environmental

degradation.



REDUCING ENVIRONMENTAL IMPACT

Green building practices aim to reduce the

environmental impact of buildings, and the very first

rule is, do not build in sprawl (In cluster).

No matter how much grass you put on your roof, no

matter how many energy-efficient windows, etc.,

you use, if you build in sprawl, you've just defeated

your purpose.

The International Energy Agency released a

publication that estimated that existing buildings areresponsible for more than 40% of the world’s total

primary energy consumption and for 24% of global

carbon dioxide emissions.



AFFORDABLE ZERO ENERGY HOMES

A few short years ago the notion of a zero energy

home was beyond the imagination of most people.

Technologies required were available.

But the costs to do this was far beyond the averagehomeowners budget.



Today we can build a home that is not only

efficient but can produce all of the energy

needed through use of renewable energy,primarily the sun.

By combining design, methods, materials and

systems we have come up with affordable

approaches to building energy free homes,today.



.

Forget the Granite Countertops and chose a solar hot

water system instead.



GOALS OF GREEN BUILDING

The concept of sustainable development can be

traced to the energy (especially fossil oil) crisis and

the environment pollution concern in the 1970s.

There are a number of motives to building green,

including environmental, economic, and social

benefits.

However, modern sustainability initiatives call for an

integrated and synergistic design to both new

construction and in the retrofitting of an existingstructure.



Also known as sustainable design, this approach

integrates the building life-cycle with each green practice

employed with a design-purpose to create a synergyamongst the practices used.

Green building brings together a vast array of practices

and techniques to reduce and ultimately eliminate the

impacts of buildings on the environment and human

health.



It often emphasizes taking advantage of renewable

resources, e.g.,

Using Sunlight through Passive Solar, Active Solar, and

Photovoltaic Techniques

Using plants and trees through green roofs, rain gardens,

and for reduction of rainwater run-off.



While the practices, or technologies, employed in green

building are constantly evolving and may differ from region

to region, there are fundamental principles that persist fromwhich the method is derived:

Siting and Structure Design Efficiency,

Energy Efficiency,

Water Efficiency, Materials Efficiency,

Indoor Environmental Quality Enhancement,

Operations and Maintenance Optimization,

Waste and Toxics Reduction



There are several key steps in DESIGNINGsustainable buildings:

Reduce loads, Optimize systems,

Generate on-site renewable energy.





SITING AND STRUCTURE DESIGN EFFICIENCY

The foundation of any construction project is rooted

in the concept and design stages.

The concept stage, in fact, is one of the major steps

in a project life cycle, as it has the largest impact on

cost and performance.

In designing environmentally optimal buildings, the

objective is to minimize the total environmental

impact associated with all life-cycle stages of the

building project.



However, building as a process is not as streamlined as

an industrial process, and varies from one building to the

other, never repeating itself identically. In addition, buildings are much more complex products,

composed of a multitude of materials and components

each constituting various design variables to be decided

at the design stage.



ENERGY EFFICIENCY

Green buildings often include measures to reduce

energy consumption – both the:

Embodied Energy Required To Extract,

Process,

Transport And Install Building Materials

And Operating Energy To Provide Services Such As

Heating And Power For Equipment.





To reduce operating energy use:

High-efficiency Windows

Insulation In Walls, Ceilings, And Floors

Increase the efficiency of the building envelope, (the barrier

between conditioned and unconditioned space).





REDUCE THE ENVIRONMENTAL IMPACT OF THE

BUILDING.

Solar water heating reduces energy costs.

Onsite generation of renewable energy through:

Solar Power,

Wind Power,

Hydro Power,

Biomass



WATER EFFICIENCY

To the maximum extent feasible, facilities should

increase their dependence on water that is

collected, used, purified, and reused on-site.

Waste-water may be minimized by utilizing water

conserving fixtures such as ultra-low flush toilets

and low-flow shower heads.



Bidets help eliminate the use of toilet paper,

reducing sewer traffic and increasing possibilities of

re-using water on-site.

Point of use water treatment and heating improves

both water quality and energy efficiency while

reducing the amount of water in circulation.



WASTE REDUCTION

Well-designed buildings also help reduce the

amount of waste generated by the occupants as

well, by providing on-site solutions such as compost

bins to reduce matter going to landfills.

To reduce the amount of wood that goes to landfill,

the CO2 Neutral Alliance (a coalition of government,

NGOs and the forest industry) created the website

dontwastewood.com. The site includes a variety of

resources for regulators, municipalities, developers,contractors, owner/operators and

individuals/homeowners looking for information on

wood recycling.



THERMAL ENVELOPE

A thermal envelope is everything about the house

that serves to shield the living space from the

outdoors.

It includes the wall and roof assemblies, insulation,

air/vapor retarders, windows, and weather-stripping

and caulking.



W ALL AND R OOF ASSEMBLIES

Most builders use traditional Concrete frame

construction.

Concrete framing is a ―Tie & Hold Technique‖

construction technique that uses a potentially

renewable resource—wood— to provide a

structurally sound, long-lasting house.

With proper construction and attention to details,

the conventional wood-framed home can be very

energy efficient.

It is now even possible to purchase a sustainably

harvested wood.

And use instead of Concrete.



OPTIMUM VALUE ENGINEERING (OVE)

This method uses wood only where it is most

effective, thus reducing costly wood use and saving

space for insulation.

The amount of lumber has been determined to be

structurally sound through both laboratory and field

tests.

However, the builder must be familiar with this type

of construction to ensure a structurally sound

house.



STRUCTURAL INSULATED PANELS (SIPS)

These sheets are generally made of plywood or

oriented-strand board (OSB) that is laminated to

foam board.

The foam may be 4 to 8 inches thick.

Because the SIP acts as both the framing and the

insulation, construction is much faster than OVE or

stick framing.

The quality of construction is often superiorbecause there are fewer places for workers to

make mistakes.



INSULATING CONCRETE FORMS (ICF).

Houses constructed in this manner consist of two

layers of extruded foam board (one inside the

house and one outside the house) that act as the

form for a steel-reinforced concrete center.

It’s the fastest technique and least likely to have

construction mistakes.

Such buildings are also very strong and easily

exceed code requirements for areas prone to

tornadoes or hurricanes.



PASSIVE SOLAR DESIGN WITH

OVERHANG ABOVE THE SOUTH FACING WINDOWS



W EATHER - STRIPPING AND C AULKING

You should seal air leaks everywhere in a home’sthermal envelope to reduce energy loss.

Good air sealing alone may reduce utility costs by asmuch as 50 percent when compared to other houses ofthe same type and age.

You can accomplish most air sealing by using twomaterials: caulking and weather-stripping.

Caulking

can be used to seal areas of potential air leakage into or outof a house.

Weather-stripping can be used to seal gaps around windows and exterior doors.



CONTROLLED VENTILATION

Since an energy-efficient house is tightly sealed, it

needs to be ventilated in a controlled manner.

Controlled, mechanical ventilation prevents health

risks from indoor air pollution, promotes a more

comfortable atmosphere, and reduces air moistureinfiltration, thus reducing the likelihood of structural

damage.



Furnaces, water heaters, clothes dryers, and

bathroom and kitchen exhaust fans expel air from

the house, making it easier to depressurize an

airtight house if all else is ignored. But natural-draft

appliances may be back-drafted by exhaust fans,which can lead to a lethal buildup of toxic



AIR LEAKAGE CAN OCCUR IN MANY PLACE

THROUGHOUT A HOME.





HEATING AND COOLING S YSTEMS

Specifying the correct sizes for heating and cooling

systems in airtight, energy-efficient homes can be

tricky.

Rule-of-thumb sizing is often inaccurate, resulting in

wasteful operation.

Conscientious builders and heating, ventilation, and

air-conditioning contractors size heating and

cooling equipment based on careful consideration

of the thermal envelope characteristics.





If an air conditioner is required, it’s often a small

unit and sufficient for all but the warmest climates.

Sometimes only a large fan and the cooler evening

air are needed to make the house comfortable.

The house is closed up in the morning and stays

cool until the next evening.



SOME EXAMPLES OF TECHNOLOGY USED

The technologies supported by the green building

projects include:

Fuel efficient stoves (FEW), which include a water-

warming facility (WWF) that can be used while cooking

(reduces 50% energy needs) Roof hatch windows (RHW), which allow more sunlight

in the home but reduce heat loss

Light roofs and efficient construction techniques which

use 60% less timber in construction, and due to their

thermal efficiency reduce up to 65% firewood needed toheat homes in the winter.These techniques also help

reduce hazard risks during earthquakes.



Insulation and other thermally-efficient housing

construction techniques which reduce energy use by up

to 70%

Roof treatment techniques and the introduction of

stabilized mud blocks to improve the thermal efficiencyof houses in rural mountain environments

Technical descriptions of three techniques – the wire-

mesh knotting equipment, galvanized wire-mesh wall

reinforcement, and the house planning tool.





IDEAL SCENARIO



THANK YOU



Questions?

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