Calx Sustainable Houses / Pezestudio

The concept of the environmentally responsible home has evolved significantly over the past 80 years, shifting from early passive solar designs to more contemporary approaches like 'passivhaus' and inner-urban apartments. This evolution reflects the broader story of sustainability itself, marked by changing focuses and terminology. In post-WW2 Australia, architects, influenced by figures like Walter Bunning, aimed to create a better society through modernist suburban housing that integrated with the landscape and climate. This led to designs emphasizing climate response, such as courtyards oriented for sunlight and privacy. The 1950s saw the Experimental Building Station promoting these ideas through instructional booklets like 'Designing Houses for Australian Climates' and 'Sunlight and Shade in Australasia'. These efforts focused on 'moral encouragement' for passive solar homes, based on scientific principles. However, their impact on mainstream housing was limited, as mass production of detached houses prioritized speed and quantity over energy efficiency or environmental considerations for the rapidly growing population. The 1960s brought a surge in environmental awareness, inspiring designs that incorporated alternative technology. This period saw a revival of vernacular forms, experimental dome structures, and autonomous houses, all aimed at addressing ecological and energy concerns. Despite these audacious fringe projects, mainstream housing largely remained unaffected. The 1973 oil shock acted as a catalyst, shifting focus towards widespread energy efficiency. Research concentrated on water heating and thermal comfort, leading to recommendations for bulk insulation, double glazing, and internal thermal mass in floors and walls. These solutions, often derived from European or US contexts, primarily targeted heating needs and frequently overlooked the cooling requirements of Australia's hot climates. While individual highly efficient passive solar homes proliferated in literature, they were largely ignored by the conventional building industry. By the 1980s, efficient design began to be reframed as ecologically sustainable development (ESD). This broadened the scope to include water cycle issues such as collection, storage, use, and recycling. The long-term impact of buildings was assessed through life cycle assessment (LCA), which incorporated the embedded energy content of materials and other environmental factors alongside operational energy. Recognizing the limited impact of 'moral encouragement', governments in the 1990s initiated regulatory measures for responsible design. Minimum thermal performance standards were introduced through NatHERS in 1993, highlighting the need for Australian-specific solutions that address both radiant and convective conditions, requiring both cooling and warming strategies. This included external insulation (outsulation), shading, and ceiling thermal mass for passive diurnal cooling. In 2003, specific energy efficiency standards were integrated into the Building Code of Australia, followed by BASIX in 2004, which focused on energy, water, and thermal comfort. While initially more effective for detached houses, BASIX gradually improved its applicability to apartments. Measures like rainwater tanks, stormwater management, and on-site detention became standard. Digital modelling advanced throughout the 2000s, leading to calculations that promoted internal environmental quality (IEQ), encompassing thermal efficiency, natural and artificial lighting, and natural and mechanical ventilation. The German 'passivhaus' concept emerged as a benchmark for extreme energy efficiency, advocating for super-sealed homes with highly controlled fresh air to minimize heating and cooling requirements. However, its application in Australia proved controversial due to its origins in sub-zero European climates, with many arguing that traditional passive design, suitable for Australia's temperate conditions and occupant habits of opening windows, is more appropriate. Since the early 2000s, the widespread availability of affordable and efficient photovoltaic panels (PVs) has enabled homes and apartments to generate electricity, making them carbon neutral, net-zero, or even carbon positive. The definition of environmental performance expanded beyond the building itself to include the embodied and operational impacts of transport and infrastructure. This led to planning considerations regarding dwelling density and location to minimize a home's overall carbon footprint. The challenge became finding the optimal 'Goldilocks' density: too low, and transport costs outweigh building efficiency; too high, and energy demands for services like basement ventilation and air conditioning become problematic. Ultimately, the most sustainable solution identified is a passive-based, well-designed cluster of 'low and close' dwellings situated near essential services, acknowledging that a truly 'fully sustainable home' remains an elusive ideal. #SustainableHouses #ClimateResponse #PassiveSolar #EnergyEfficiency #EcologicalSustainableDevelopment #LifeCycleAssessment #BuildingCodes #NatHERS #BASIX #Passivhaus #PhotovoltaicPanels #CarbonNeutral #UrbanPlanning

The article discusses Architect Jeffrey Adams' "Pretty Good House" (PGH) concept, an alternative to the stringent Passive House standard, which aims for efficiency without being cost-prohibitive. The PGH standard, initially conceived by designer/builder Michael Maines and builder Dan Kolbert in 2012, focuses on creating houses that are efficient, climate-adaptive, healthy, and comfortable. The PGH 2.0 further incorporates embodied carbon and location into its guidelines. Adams' Meadow View House exemplifies the PGH principles through its simple, compact design, a crucial factor in minimizing material and energy consumption. The house’s form, described as "Boxy But Beautiful" by Passive House architect Bronwyn Barry, draws inspiration from vernacular barn architecture, utilizing strategic cut-aways for views and recessed doorways, and a wrap-around porch for shading and outdoor space. A key aspect of the PGH standard, and evident in Meadow View House, is a high-performance building envelope. This includes top-tier low-e glazing, proper solar orientation, exterior rigid insulation to prevent thermal bridging, advanced framing to reduce lumber use and maximize insulation, a ventilated attic with R-60 cellulose insulation, and an insulated concrete slab for thermal mass. Rigorous air sealing further enhances the envelope's effectiveness. The PGH standard also advocates for a holistic approach, emphasizing smaller home sizes, locally sourced materials, and materials with low embodied carbon, contrasting with the potential for Passive Houses to be built with less environmentally conscious materials. The Meadow View House features an all-electric system, facilitated by its minimal heating and cooling demands. It incorporates an induction range, a heat recovery ventilation system for fresh air, and two mini-split heat pumps for climate control. The open-plan ground floor, with utility and flex rooms as the only enclosed spaces, reflects post-pandemic design considerations, placing the utility room conveniently near the main entrance. The article also highlights the unique design of the stair to the second floor, built with thin treads and risers on a steel tube to maximize the view through a large window. On the second floor, Adams opted for one large shared bathroom, with functions separated to allow simultaneous use by multiple people, rather than the typical two-bathroom setup. The article notes a design challenge with mini-splits in individual bedrooms, as observed by Adams himself and the author, where cold air tends to fall downstairs if bedroom doors are closed, suggesting that ducted systems might be more effective for individual rooms. Ultimately, the article raises a question about the sufficiency of the "Pretty Good House" standard in the face of the climate crisis, especially when compared to the more rigorous Passive House standard. While acknowledging that PGH is more accessible and realistic for many Americans who desire single-family homes and cars, the author points out a potential thermal bridge in the Meadow View House's foundation, suggesting that a Passive House approach might have identified and addressed such details more effectively. The discussion concludes by acknowledging PGH's advantages in promoting better building practices, including consideration for embodied carbon and location, but prompts a reflection on whether "pretty good" is adequate given the urgency of climate change. #SustainableArchitecture #PrettyGoodHouse #PassiveHouse #GreenBuilding #EnergyEfficiency #EmbodiedCarbon #HomeDesign #ClimateCrisis #ArchitecturalDesign

The increasing importance of minimizing environmental impact drives the focus on building future-proof eco-houses with environmentally friendly designs. Sustainable home design has evolved significantly, incorporating advanced technologies and building techniques. The article presents ten examples of sustainable homes that showcase innovative eco-friendly design principles and practices. One featured home is a revamped red-brick abode on the outskirts of Byron Bay, clad in sustainably grown golden cypress. This residence incorporates handmade details, including rosewood doors upcycled from the original roof, highlighting the use of recycled and sustainable materials. Another example is a renovated weatherboard cottage, designed to be as off-grid as possible, featuring a central wood stove for winter heating, solar panels for hot water and electricity, and an extensive kitchen garden for self-sufficiency. A home on the NSW South Coast blends classic mid-century modern style with contemporary eco-friendly design, utilizing timber-battened external screens. These screens manage natural light and privacy while contributing to passive-solar design. In Perth, a small eco-friendly house employs a 'reverse-brick veneer' method, where interior bricks help regulate temperature. This design, built on a compact block, prioritizes thermal efficiency. Further demonstrating sustainable living, a modern Australian farmhouse in the Victorian countryside is off-grid, solar-powered, and includes hydronic heating, allowing complete self-sufficiency for the family. Another contemporary home in Perth, built with self-sufficiency in mind, features rainwater harvesting, hydronic floor heating, double-glazed floor-to-ceiling glass, and solar panels. This house aims for minimal environmental impact while maintaining a modern aesthetic. A new Perth home draws inspiration from classic Australian Victorian and Edwardian architecture, integrating an impressive six-star energy-efficient rating to align with the owners' eco-friendly beliefs. Additionally, an updated weatherboard cottage, whose owners are experts in sustainable building design, utilizes recycled, natural, and sustainably produced materials alongside energy-efficient elements like solar panels and rainwater tanks. This approach demonstrates a holistic commitment to sustainability. In Melbourne, a sustainable home emphasizes timber, using recycled Tasmanian oak for flooring. Its design incorporates brise soleil for natural ventilation and shading, along with a rammed earth wall, to seamlessly blend with the natural landscape. Another Melbourne bungalow underwent an eco-friendly transformation, maximizing natural light and incorporating organic materials and upcycled details to enhance its sustainable credentials. These diverse examples illustrate how aesthetic appeal and modern functionality can be achieved while upholding strong environmental values. #EcoFriendlyHome #SustainableDesign #HomeTours #GreenBuilding #EnvironmentalImpact #ArchitecturalInnovation #RenewableEnergy #RecycledMaterials #PassiveDesign

DHaus's 'La Terre' project is a four-bedroom family home situated in the Surrey countryside, Southern England, that exemplifies a commitment to sustainable architecture and ecological integration. The design utilizes modern, eco-friendly construction techniques, prominently featuring stabilized rammed earth, an ancient method updated with contemporary technology to enhance strength, weather resistance, and environmental performance. This material choice offers an eco-friendly alternative to conventional building materials like cut stone, concrete, and brick, achieving optimal environmental performance. The home is conceptualized to appear sculpted from its natural surroundings, with its earth walls subtly blending into the landscape. A distinctive feature is its elevated ground floor, which sits 0.5 meters above the surrounding grass. This elevation creates a visual illusion of weightlessness and levitation, echoing the architectural styles of historic country homes from the 1940s. The London-based practice, DHaus, meticulously designed accessible steps that flow in and out of the living areas, clearly articulating the functional spaces of the home. The structural integrity of 'La Terre' is supported by cast concrete plinths that serve as the foundation for the stabilized earth walls, effectively preventing erosion and ensuring long-term stability. Beyond its structural and aesthetic benefits, the project incorporates passive house principles to minimize energy consumption. This approach underscores a broader commitment to sustainability, aiming for a low environmental footprint throughout the building's lifecycle. Interior design plays a crucial role in connecting residents with the natural environment. Two expansive atriums are integrated into the circulation spaces, each housing Japanese gardens. These interior gardens are designed to immerse inhabitants in the engulfing landscape as they navigate through the house, fostering a continuous visual and experiential link between indoor and outdoor realms. Large expanses of glazing further enhance this connection, particularly in the living spaces, allowing abundant natural light and panoramic views of the surrounding countryside. Further emphasizing its eco-friendly design, a natural pond is incorporated into the property, providing another element that allows inhabitants to connect with nature. The master bathroom also features views overlooking the garden, ensuring that even private spaces maintain a visual relationship with the external environment. Horizontal bands in the architecture create elevated green spaces, which appear to hover in the air, contributing to the home's distinctive and harmonious integration with its site. In essence, 'La Terre' represents a comprehensive architectural solution that prioritizes sustainability, aesthetic integration with nature, and a harmonious living experience through innovative use of materials, passive design strategies, and thoughtful spatial planning. #EcoFriendlyHome #RammedEarthArchitecture #SustainableDesign #PassiveHousePrinciples #ResidentialArchitecture #SurreyCountryside #DHaus #BiophilicDesign #GreenArchitecture

Renovating a home can be a complex and often stressful undertaking, particularly when aiming for eco-friendly practices. However, integrating sustainability into home design has become more accessible, with numerous options available for both major and minor changes. Adopting a sustainable mindset for decisions regarding paint, flooring, lighting, appliances, furniture, textiles, and decor can simplify the renovation process and contribute to a greener living space while benefiting the environment. To ensure sustainable choices during renovation, it is recommended to hire LEED (Leadership in Energy and Environmental Design) accredited professionals. These individuals, including architects, interior designers, and general contractors, are certified by the U.S. Green Building Council (USGBC), guaranteeing their focus on sustainable building practices. Updating appliances is another key step. In bathrooms, installing low-flow faucets and low-flush toilets can significantly reduce water consumption. For large appliances like washing machines, selecting models with the highest energy ratings is crucial. Replacing traditional lighting with LED systems saves energy and lowers operational costs. Furthermore, switching from gas stoves to induction models is a recommended strategy to reduce reliance on fossil fuels, as induction cooking is now considered superior in efficiency and environmental impact. Heat pumps offer a more efficient alternative for home cooling and water heating. The recently enacted Inflation Reduction Act provides tax incentives for climate-friendly improvements, such as installing solar panels and purchasing energy-efficient appliances, windows, and doors. When selecting materials for building, renovation, interior design, and decor, prioritizing naturally regenerative options is essential. Materials such as bamboo and cork are highly recommended. Natural materials like hemp, straw, and wood can improve indoor air quality by eliminating toxic Red List chemicals often found in synthetic products. For paint, low or no VOC (Volatile Organic Compound) options are preferable, with brands like Clare Paint offering such products. Natural clay plaster wall finishes, such as those from British company Clayworks, provide a sustainable alternative to traditional paints by using unfired clays mixed with minerals and natural pigments. For textiles, including curtains, upholstery, and linens, natural materials like hemp and linen are excellent choices due to their sustainability, rapid growth, and recyclability. Innovative eco-friendly materials are also emerging, such as lamps grown from mycelium, the renewable root fibers of mushrooms. Reducing waste is a core principle of sustainable renovation, encompassing the concepts of reduce, reuse, and recycle. Embracing vintage and secondhand items for fashion and home goods is increasingly common. When renovating, homeowners should evaluate existing elements to determine what can be saved, preserved, and rehabilitated instead of undertaking complete gut renovations. For instance, removing layers of past renovations might reveal original features like exposed brick or millwork that can be restored to add character. Refinishing old hardwood floors or painting them if they are too damaged are sustainable alternatives to replacement. Collaborating with contractors who share a commitment to sustainability is important, and homeowners should advocate for their environmentally conscious preferences. DIY renovators can challenge themselves to source as many repurposed materials as possible before purchasing new ones. For example, a DIY kitchen project utilized reclaimed wooden floorboards, recycled crates for shelves, old pipes for rails, and oak laths for an oven hood. For decor, reassessing existing items, repurposing old furniture, and recovering textiles can minimize new purchases. Buying local is another effective way to support sustainable practices. Seeking out small businesses and local artisans with transparent sustainability mission statements helps reduce transportation-related emissions and supports local economies. Companies like Alabama Sawyer, which transforms fallen urban trees into furniture and home goods, exemplify this approach. High-end consignment marketplaces, such as The Local Vault, offer pre-owned luxury furnishings, promoting reuse. Additionally, supporting women- and minority-owned businesses through directories like the Small Business Administration’s searchable database can address the disproportionate impact of climate change on socially vulnerable communities. Finally, integrating nature into indoor spaces, known as biophilic design, benefits both individuals and the planet. Incorporating houseplants or living walls and maximizing natural light with strategies like well-placed mirrors can reduce energy consumption. Biophilic design emphasizes connecting people with nature in the built environment, leading to improved health, productivity, and happiness. This can be achieved through simple additions like plants or by making it a guiding principle in new home construction, ensuring residents feel connected to the natural world. #SustainableRenovation #EcoFriendlyHome #GreenBuilding #LEEDAccreditation #EnergyEfficiency #NaturalMaterials #WasteReduction #BiophilicDesign #LocalSourcing