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Retrofit / Remodel Existing Buildings | Pangea Builders


Existing conventional building can be and should be retrofitted and remodeled toward becoming green buildings.

Remodeling kitchens and bathrooms make a huge difference and increases the value of your home. We are focused on customer satisfaction and the environment and implement many green practices in our kitchen and bathroom remodeling projects. Green building techniques have been practiced by Earthship 360 for many decades. We can show you the pros and cons of the green home remodeling products available. Greening can look different for each green bathroom remodeling project and can be integrated at different levels.

earthship greenhouse solarium


We will guide you through the design process and material selections keeping your budget in mind to achieve an outcome beyond your expectations in the most used room of your home. We handle all aspects of the project from the demolition and design work to the finishing touches. We install granite, quartz, soapstone & laminate counters, wood and ceramic flooring, ceramic backsplash, and a wide range of high quality cabinetry.


Hall bath, master bath or powder room – we use the highest quality materials, from bath fixtures to ceramic tile. We bring together the latest design elements with curbless showers, custom frameless shower doors, comfort height toilets, whirlpool and bubble tubs. We have invaluable skills and experience with the design of a new bathroom especially when relocating fixtures.


From simply adding living space in your basement or something more complex with a wet bar and bathroom to adding bedrooms or a home office in the attic and everything in between.


Whether it be a small kitchen or bath expansion or a full second story, our team of skilled craftsmen have the knowledge and experience to bring your idea to reality.


Adopting Passive House Building Standards

Insulating older buildings was also necessary to reduce energy consumption, but often proved expensive. The retrofit of the existing housing stock is a real challenge. It’s certainly possible to get it up to that sort of [Passivhaus] standard but I didn’t say it was easy. You either put [insulation] on the outside of the house which will affect what the building looks like or you put it on the inside which affects how big the rooms are [but] it can be done on a piecemeal basis


3 ways to make old homes more sustainable and energy efficient

You don’t need to start from scratch to have a more efficient home. Find out how you can boost your home’s environmental credentials with some smart retrofits

Building regulations require today’s new homes to be more eco-friendly than ever before. But if, like most Australians, you’re not living in a freshly constructed home, you’ll need to embrace retrofitting if you want to improve your home’s sustainability.

thermal mass dynamics

A lot of homeowners are daunted by the word ‘retrofit’. They assume it’s going to be an expensive and complicated process, but retrofitting just means updating your home with the technology and materials we have available to us today. It is making small but effective improvements within the bounds of your existing home’s design.

Here are three ways you can instantly boost your homes green credentials.


read more at earthship360.com/3-ways-to-make-old-homes-more-sustainable-and-energy-efficient

Retrofitting a few city buildings would have big impact on overall carbon emissions.

Many programs encourage owners of homes and other buildings to improve their energy efficiency, sometimes offering substantial subsidies or tax incentives for doing so. Now, planners may have a way to determine where such programs can get the most return for that investment: New research shows how to identify the buildings where retrofitting for energy efficiency will have the biggest impact on a city’s overall greenhouse gas emissions.

sustainable cities

The authors point out that 44 percent of all energy used in buildings in the United States goes toward heating and cooling, and this accounts for 20 percent of the national carbon dioxide emissions. So, making a significant dent in that sector could help the country meet its commitments for curbing greenhouse gas emissions.

But not all housing is created equal, and making retrofits in some of the least efficient buildings could have a much bigger impact on emissions than fixing up buildings that already perform relatively well. Figuring out how to identify the buildings most in need of improvement, however, at a scale useful for city officials and utility companies, is not a simple task.

There are 82 different parameters that can have an effect on the overall thermal efficiency of a building, but much of these data require detailed on-site measurement and in some cases specialized equipment, making it impractical to do such assessments at the scale of entire cities. But after a careful study of representative areas in Boston and Cambridge, Massachusetts, the team found that it is possible to use just eight of these factors to reach conclusions that are almost as accurate, which makes the task much more feasible.

read more about retrofitting cities: earthship360.com/time-to-retrofit-our-cities

Solar Panels on Your House


Retrofitting Existing Buildings to Improve Sustainability and Energy Performance


Retrofitting an existing building can oftentimes be more cost-effective than building a new facility. Since buildings consume a significant amount of energy (40 percent of the nation’s total U.S. energy consumption), particularly for heating and cooling (32 percent), and because existing buildings comprise the largest segment of the built environment, it is important to initiate energy conservation retrofits to reduce energy consumption and the cost of heating, cooling, and lighting buildings. But conserving energy is not the only reason for retrofitting existing buildings. The goal should be to create a high-performance building by applying the integrated, whole-building design process, to the project during the planning or charrette phase that ensures all key design objectives are met. For example, the integrated project team may discover a single design strategy that will meet multiple design objectives. Doing so will mean that the building will be less costly to operate, will increase in value, last longer, and contribute to a better, healthier, more comfortable environment for people in which to live and work. Improving indoor environmental quality, decreasing moisture penetration, and reducing mold all will result in improved occupant health and productivity. Further, when deciding on a retrofit, consider upgrading for accessibility, safety and security at the same time. The unique aspects for retrofit of historic buildings must be given special consideration. Designing major renovations and retrofits for existing buildings to include sustainability initiatives will reduce operation costs and environmental impacts, and can increase building adaptability, durability, and resiliency.


Before making what may amount to a major investment in the retrofit of existing buildings for energy and sustainability improvements, it is important to determine if the investment is worthwhile in perspective with other building conditions. Is the building structurally sound? Are seismic upgrades needed to meet current standards and local building code requirements? Do hazardous material like asbestos, polychlorinated biphenyls (PCB) and lead paint have to be contained and removed? Can the work be done in phases to minimize disruption to the occupants? Relocating occupants to other facilities can be a significant expense. If a vegetative roof is being considered, is the roof able to support the additional weight without costly reinforcement? Look for opportunities to reduce the cost of the work by recycling waste and demolition materials.

Once you have determined that other building conditions are not impediments to upgrading for sustainability and improved energy performance, you should have a plan and follow a sequence of activities in order to determine the best options for energy and sustainability improvements.

  • First, determine if the existing systems are operating at optimum levels before considering replacing existing equipment with new higher efficiency equipment. This can be accomplished by performing an energy audit. Sometimes, considerable savings in utility costs can be gained by evaluating the performance of the building envelope and existing systems: leaks, clogged/dirty filters, stuck dampers, disabled sensors, faulty or incorrect wiring, or even lack of knowledge on how to properly operate and maintain equipment can all contribute to inefficiencies and increased costs. Audit the performance of the building’s water systems as well; since leaking and inefficient systems not only waste water, they also use energy by needlessly running pumps and other electrical equipment.
  • Then, if the building is metered, review utility bills from the last two years to determine if consumption (not cost) has risen.

Federal Agencies are required by Executive Order 13514 to have 15 percent of their existing facilities and buildings meet the Guiding Principles by the end of FY 2015, with continued improvement toward 100 percent thereafter. For existing federal buildings, performing an energy audit (assessing existing condition and operational procedures of the building and major building systems and identify areas for improvement) is one of the Guiding Principles for Sustainable Existing Buildings.

  • Next, determine air tightness of the building envelope by examining the building envelope, looking for leaky windows, gaps around vents and pipe penetrations, and moisture intrusion. Upgrading heating and air-conditioning systems without addressing problems with the building envelope will result in less than optimum performance of those systems. Employ the methods in ASTM E1827, Standard Test Methods for Determining Airtightness of Buildings Using an Orifice Blower Door and ASTM E779, Determining Airtightness of Buildings Air Leakage Rate by Single Zone Air Pressurization. Consider also doing tracer gas test described in ASTM E741, Standard Test Method for Determining Air Change in a Single Zone by Means of a Tracer Gas Dilution.

Sustainability and Energy-Efficiency Strategies

  • Recommission all energy andand water systems to determine they are operating at optimum performance; then upgrade energy and water systems to minimize consumption.
  • Develop a plan to optimize the recycling and reuse of demolition debris and construction waste to minimize waste sent to landfills.
  • Evaluate occupancy patterns, then apply daylight, HVAC and lighting sensors in appropriate locations. Incorporate energy efficient lighting into the project as appropriate for the tasks and functions of the spaces.
  • Determine if natural ventilation and fresh air intake are feasible alternatives to reduce heating and cooling loads.
  • Investigate renewable energy options that can offset the purchase of fossil fuel-based energy.
  • Consider solar shading devices for windows and doors, including those that generate electricity by photovoltaic (PV) devices.
  • Replace existing windows with high-performance windows appropriate for climate and exposure. If building requires security upgrade, evaluate blast resistant windows and films. If building is located in a high noise area, evaluate windows that also include adequate exterior to interior noise reduction.
  • Analyze the benefits of distributed generation if the building is in a campus cluster or can share the on-site energy produced with adjacent buildings.
  • Balance the project’s sustainable goals with its security goals including protecting the building and its occupants from natural and man-caused disasters.
  • Certain site renovations can improve the energy performance of the building including reducing the heat island effect.
  • Determine if a cool roof or green roof are cost-effective ways to reduce heat island effect and stormwater runoff.
  • Employ Energy Star and/or a green building rating system for existing buildings like LEED for Existing Buildings: Operations and Maintenance (LEED EBOM) or Green Globes for Existing Buildings to gage the building’s level of performance.
  • For historic buildings, update systems appropriately to maintain a balance between the need for energy and water savings with the character of the original building fabric.
  • Take the opportunity afforded by the building renovation to incorporate sustainable operations and maintenance practices and switch to green cleaning products and methods.
  • To ensure a newly renovated building continues to perform as designed, measure the performance of the building regularly.
  • If not already metered, plan on installing meters for electric, gas, water and other utilities. Smart meters and submeters are preferable to monitor real-time consumption, control demand and increase tenant accountability (cost control).


Relevant Codes

Relevant Standards



  • Advanced Energy Retrofit Guide for Office Buildings (PDF 3.64 MB), PECI-DOE
  • Advanced Energy Retrofit Guide for Retail Buildings (PDF 2.64 MB), PECI-DOE
  • “Energy Efficiency Retrofitting of Existing Buildings”, Journal of Building Enclosure Design Winter 2009 (PDF 3.3 MB)
  • The Greenest Building: Quantifying the Environmental Value of Building Reuse (PDF 10.5 MB), National Trust for Historic Preservation