Earth Wall Builders Unite!

Mechanically stabilized earth (MSE) walls have gained significant popularity due to their economic advantages, ease of construction, and the wide array of proprietary systems available. These walls operate as gravity-retaining structures, relying on facing elements, compacted soil, and reinforcement working in conjunction. The reinforced-soil mass, formed by interlayered soil backfill and reinforcement, uses its self-weight to resist lateral pressures from various sources, including earth, surcharges from vehicles and buildings, seismic events, and water. A key benefit of MSE walls is their cost-effectiveness, often reducing expenses by 50 percent or more compared to conventional reinforced-concrete retaining structures, as highlighted by a 2001 USDOT and FHWA publication. Furthermore, their aesthetic appeal and straightforward construction methods, which don't necessitate highly specialized skills or equipment, contribute to their widespread adoption. While granular and free-draining select soil backfill is ideal, projects can utilize less desirable site soils if appropriate design and construction controls are implemented. Despite their advantages, MSE walls are susceptible to failure or performance issues, often stemming from common contributors such as the impact of civil site improvements, inadequate surface and subsurface water management, and poor project communication. Civil site improvements, particularly utility installations, pose significant challenges. Utilities, whether water-bearing (like drainage or pressurized waterlines) or non-water-bearing (like electrical conduits and gas lines), can be installed at various depths and locations relative to the wall, potentially affecting its performance. These installations can interfere with the soil reinforcing, leading to discontinuities. For instance, guardrails, utility manholes, and light poles might penetrate the reinforcing elements, causing damage or necessitating their removal, thereby reducing the wall's resistance to loads or introducing additional stresses. Such interferences are frequently overlooked during the design phase, requiring careful consideration from the MSE wall designer, civil site engineer, and contractor during construction. Water-bearing utilities are particularly problematic. If placed within or directly behind the reinforced fill, they can interrupt reinforcing and are prone to leakage over time. Severe leaks can lead to rapid hydrostatic or seepage pressure buildup behind the wall and erode the soil by transporting fine-grained particles through the mass. The wall designer must account for potential leakage and assess whether designing for water pressures is necessary to prevent structural issues. These considerations emphasize the critical need for comprehensive planning, design coordination, and effective communication among all project stakeholders to mitigate risks and ensure the long-term stability and performance of MSE walls. #BryanPStrohman #CivilEngineering #MechanicallyStabilizedEarthFoundationWalls #ReinforcedSoil #RetainingWall #ScottJDiFiore #WaterManagement

The use of rammed earth as a building material is experiencing a resurgence in UK and European architecture, moving beyond its historical association with 'eco' projects or aid work. Scott Boote of Webb Yates Engineers advocates for this ancient method as a viable low-carbon alternative in contemporary construction, particularly as the industry aims to meet 2030 carbon and energy targets, adopt circular economy principles, and engage with initiatives like the RetroFirst campaign. Modern multi-storey buildings often rely on concrete, steel, or timber frames with non-structural external walls made from energy-intensive materials like metal studwork or concrete blocks. Rammed earth, by contrast, offers a sustainable solution that leverages locally available soil, reducing both manufacturing and transportation emissions. While some perceive rammed earth as primitive, it can be finished in various ways, including rendering, cladding, painting, plastering, dry-lining, or sealing, making it a direct substitute for energy-hungry clay bricks or concrete blocks. The material is primarily composed of aggregates such as sands and gravels, with a small clay content acting as a binder. Careful control of moisture content is crucial during its formation to prevent shrinkage, cracking, or inadequate binding. However, with proper preparation, rammed earth allows for faster construction than cob or adobe mud buildings and can be scaled for projects such as new office blocks or housing schemes. Its durability, when correctly detailed, is evident in historical structures like parts of the Great Wall of China and the Great Pyramid of Giza, as well as numerous 200-year-old rammed earth buildings in the UK. Design considerations, such as building on durable plinths and incorporating increased roof overhangs or 'speed bumps' like slate or tile courses, can protect against erosion and enhance longevity. Earth walls are typically thick, which provides significant thermal mass and moisture buffering, helping to regulate internal environments without the complex layering common in modern construction. Although rammed earth has low embodied energy, it requires insulation in cooler climates. Its density and constituent materials are similar to clay brickwork or concrete blockwork, resulting in comparable thermal performance. However, employing earth construction can reduce a wall's carbon footprint by two-thirds. Construction costs are often on par with conventional masonry, and the use of site-won or local materials can further enhance its cost-effectiveness. Recycled concrete, brick, and stone can also form the bulk of the rammed earth mixture, requiring only a small addition of dried clay, which contributes to a more economical and sustainable building process. Meeting climate commitments necessitates a shift towards new working methods and a more circular design approach. This involves moving away from linear design processes that culminate in mass-produced products and, instead, focusing on sourcing and utilizing locally available materials. These materials would be thoroughly tested, analyzed, and certified on a project-by-project basis. The integration of site-won demolition or excavation materials into new construction projects, such as using them in the fabric of a building, is a logical and environmentally responsible step in this evolving paradigm. The article provides several examples of contemporary rammed earth architecture, including the Strawbale Workshops by Grain Architecture, Bushey Cemetery by Waugh Thistleton Architects, Yorkshire Sculpture Park by Feilden Fowles (though using a similar aesthetic with pigmented concrete), the TECLA 3D-printed dwelling prototype by Mario Cucinella Architects and WASP, and the CobBauge project for new-generation cob homes, demonstrating the versatility and potential of earth-based construction methods. #RammedEarth #SustainableArchitecture #LowCarbonConstruction #CircularEconomy #BuildingMaterials #ArchitecturalInnovation #RetroFirst #GreenBuilding #EmbodiedEnergy

The concept of a 'gallery wall' traditionally evokes images of framed family photos, but this article expands that notion to encompass a diverse array of objects and styles, transforming walls into dynamic displays of personal expression and decorative flair. The article showcases various innovative approaches to wall decoration, moving beyond conventional framed art. One featured idea involves industrial-style oversized clocks, demonstrating how functional items can be repurposed as impactful decorative elements. This approach is exemplified by a display at N. Reding and Sons Vintage Industrial Uniques, where multiple large clocks create a timely and visually striking statement. Another technique highlighted is the use of mirrors. A Birmingham home, designed by Corey Damen Jenkins, incorporates a collection of antique and vintage-inspired mirrors, which collectively create a 'serious pop' on the wall, adding depth and reflecting light to enhance the room's aesthetic. Beyond traditional décor, the article explores more unconventional options like wall planters. Glazed ceramic wallscape pots, available in various sizes, can be arranged to form a 'garden gallery wall,' effectively bringing nature indoors and turning plants into living art pieces. This method offers a refreshing alternative to static wall art and introduces organic textures and colors into the living space. A particularly creative example is presented from Art Van's new store in Canton, where hundreds of white melamine plates are arranged to form a large-scale collage. Leah Zanetti, Art Van's director of graphics, explains the challenge of finding lightweight dinnerware suitable for vertical mounting. The installation process, carried out by Detroit's Prop Art Studio, involved drilling tiny pins into the back of each plate and cup, which were then mounted to the wall with silicone. This intricate display creates a unique focal point in the dining area, demonstrating how everyday objects can be elevated into significant artistic installations. The article also includes examples from Ashley Furniture, which utilizes a mix of oversized art and various wall décor items to craft a 'cool collage,' suggesting that varied scales and textures can contribute to an engaging display. For those who prefer a more classic approach, a dining room wall featuring a collage of family photos is also shown, acknowledging the enduring appeal of personal photographic displays. Tips for creating an effective gallery wall are also provided, including advice from interior stylist Kirsten Grove of 'Simply Styling.' She recommends maintaining a spacing of 4 to 5 inches between standard-sized frames to ensure a cohesive and balanced arrangement. The article further diversifies its suggestions by presenting a gallery wall made from scarves, offering a soft, textile-based alternative to framed items, and a display of vintage artwork, which can add character and a sense of history to a space. Lastly, the article notes the availability of a wide range of oversized clocks at retailers like Pier 1 Imports, emphasizing the accessibility of diverse decorative elements for creating impactful wall displays. Overall, the article aims to inspire readers to think creatively about wall decoration, encouraging them to use a variety of objects to personalize and enhance their living environments. #InteriorDesign #WallDecor #GalleryWall #HomeStyling #CreativeDecor #HomeAccessories #ArtisticDisplay #DIYHomeDecor

Living green walls, also known as vertical gardens, are increasingly popular in urban environments worldwide, offering various benefits for urban sustainability. These installations help address the urban heat island effect and rising temperatures by providing natural cooling for buildings through microclimate regulation and enhancing urban ecosystems by creating habitats for diverse species. Beyond environmental advantages, green walls also contribute aesthetic and emotional value to buildings and their occupants. For instance, workers in a building featuring living green walls reported finding the installations visually appealing, refreshing, restorative, and a source of significant mental and emotional well-being throughout their workday. Despite these numerous benefits, the widespread adoption of living green walls faces several significant challenges. A primary obstacle is maintenance, particularly in climates with extreme heat and drought, such as Australia. Keeping plants alive and thriving requires frequent watering, pruning, and pest management, which can be demanding and costly. Without consistent care, plant failures are common, especially during adverse weather conditions. Designers and clients often struggle with the long-term financial commitment and specialized knowledge required for proper upkeep, making maintenance a substantial barrier to wider implementation. Fire safety is another critical concern, as many living green walls utilize plastic components that can pose fire risks, particularly during dry periods. The lack of adequate fire safety guidelines and the difficulty of accessing high-rise installations for firefighting operations exacerbate these concerns. There is a clear need for updated regulations and the incorporation of fire-resistant materials in green wall designs to mitigate these risks and ensure public safety. The high costs associated with living green walls, encompassing both initial installation and ongoing maintenance, present a significant financial hurdle. These costs include plant replacement, irrigation systems, and expert labor, deterring many potential adopters. The absence of government subsidies or other financial incentives further compounds affordability issues, limiting the adoption of these beneficial structures. Many proposed projects involving green walls fail to proceed to the construction phase due to these prohibitive costs compared to perceived benefits. Design complexities also limit the applicability of living green walls. Not all building structures or environmental conditions are suitable for every type of vertical garden system. Poor system selection can lead to structural risks, system failure, or inadequate plant growth. Effective design requires careful consideration of a building's architecture, location, and specific climate conditions, necessitating expert consultation. The lack of standardized guidelines for installation, fire safety, and maintenance further contributes to inconsistent quality and performance across the industry. Industry stakeholders advocate for clearer government regulations and industry-wide best practices to ensure more reliable and successful implementations of living green walls in urban areas. Addressing these challenges through improved guidelines, resilient designs, and financial support is crucial for realizing the full potential of green walls in enhancing urban sustainability and fostering climate-resilient cities. #LivingGreenWalls #VerticalGardens #UrbanSustainability #UrbanHeatIsland #SustainableArchitecture #GreenInfrastructure #ClimateResilientCities #EnvironmentalBenefits #BuildingDesign

Rammed earth construction, an ancient technique originating independently in China and the Iberian Peninsula several thousand years ago, is gaining recognition for its numerous green building benefits. This method, utilized in structures like the Hakka Tulou in China and the Alhambra Palace in Spain, offers low embodied energy, recyclability, high thermal mass, low energy loads, and non-toxicity. Terrell Wong, principal of Stone’s Throw Design Inc. in Ontario, Canada, advocates for rammed earth, highlighting its durability and longevity, asserting that a rammed earth house can last 500 years or more without needing paint. Rammed earth walls are constructed in approximately 11.5 ft. panels with flexible joints. The material mix typically includes 20% to 30% clay, sand, and 5% to 10% cement for added strength, with silicate-based waterproofing sometimes incorporated for cold, wet climates. The process involves layering a foot of material into formwork, which is then compressed to 6 inches using a pneumatic tamper. The forms, usually made from Marine-grade plywood and 2x12 walers, are about 20 inches wide and 4 feet tall. For multi-panel walls, a recess on the first panel locks with the second. Conduits for plumbing and electrical wiring are integrated during construction, requiring precise planning as changes are impossible once the wall is set. Walls typically dry within 24 hours and possess a load-bearing capacity comparable to concrete. Despite its ancient origins and proven effectiveness, rammed earth construction remains a niche method in North America. Terrell Wong designs three to four rammed earth houses annually, noting only a handful of builders in Ontario specialize in this technique. Sylvia Cook of Aerecura Rammed Earth Builders emphasizes that the method's thermal mass benefits apply universally, delaying heat gain in hot climates and shifting heat loss in cold climates to periods when solar gain can compensate, thus maintaining consistent indoor temperatures. The limited adoption is primarily attributed to a lack of public and professional knowledge about the system’s versatility across different climates. The distinctive earthy-toned striations characteristic of rammed earth walls are achieved by adding pigment to the cement mix. The ramming process pushes the colors to the formwork edges, creating a natural gradation. Exaggerating the undulations in the formwork can enhance these visual effects. While modern rammed earth construction has advanced, North America lacks specific building codes for it, unlike Australia and New Zealand where codes are formalized, and research even suggests superior seismic resistance compared to brick or block walls. In Canada, builders obtain approval by demonstrating that rammed earth meets existing code requirements, similar to concrete. In colder regions like Ontario, fiberglass rebar is used for structural stability, and recycled polyiso insulation is often integrated into the walls to minimize thermal bridging. The cost of rammed earth projects is influenced by design complexity, with curved or angled walls being more expensive due to the labor-intensive nature of the method. However, by simplifying design and formwork, Terrell Wong successfully applied the technique to an affordable housing project meeting Passive House standards. Many rammed earth homes are hybrids, incorporating elements like stick- or timber-frame walls for interior partitions or upper floors, sometimes combined with straw-bale construction or CLT-panel roofs. The featured single-family home, situated in a rural Ontario subdivision, exemplifies the integration of rammed earth with Passive House strategies. The design maximizes thermal mass, harvests southern light, and utilizes cross breezes to enhance passive ventilation, eliminating the need for mechanical cooling. The home's heating demand is approximately 20 kWh/m2 annually. The exterior walls consist of 530 tons of thermal mass, comprising two 6-inch rammed earth wythes around 6 inches of insulation. The construction’s embodied energy is exceptionally low, as 90% of the unprocessed material was sourced from a nearby gravel pit, and salvaged wood from a local roundhouse was repurposed for the main stair. #RammedEarthConstruction #SustainableBuilding #GreenBuilding #ThermalMass #PassiveHouse #BuildingMaterials #EcoFriendlyHomes #ArchitecturalDesign #CanadianArchitecture

In the remote Pilbara region of Western Australia, a new architectural project known as “The Great Wall of WA” features a zig-zagging rammed earth structure housing 12 residences. Designed by architect Luigi Rosselli, this 230-meter-long wall is considered the longest rammed earth wall in Australia and potentially the Southern Hemisphere. The design leverages the Earth's natural cooling properties, embedding the homes beneath the rocky red soil to offer protection from the intense heat of the arid climate. This collective housing project, initially conceived as guest houses for a century-old family cattle station, demonstrates the effectiveness and aesthetic appeal of earth-sheltered architecture. It was recognized as a finalist in the Australian Institute of Architects Western Australia architecture awards and won "best housing project" in ArchDaily's Building of the Year contest in 2016. The residences are accented by Cor-Ten steel canopies and are stepped to ensure privacy, with only their verandahs visible from the exterior. These awnings are strategically placed to prevent direct sunlight from entering the interiors through the glass doors. The complex also includes an oval chapel, positioned on an artificial dune overlooking the family cemetery, with its roof matching the Cor-Ten steel canopies of the residences. The back of each guest house leads to a communal meeting area and lounge, featuring a pergola constructed from old drilling pipes. The chapel, drawing inspiration from the Pantheon of Rome, is oriented eastward and includes a glass-covered oculus. Its curved glass windows can be opened to the elements or closed to protect against dust storms. The firm highlights that the 450-mm thick rammed earth facade and the sand dune covering the rear and roofs of the residences provide exceptional thermal mass. This design makes the homes naturally cool in the subtropical environment, offering a significant improvement over traditional corrugated metal shelters commonly found in remote North Western Australia. The construction materials, including rammed earth sourced from local clay pans and pebbles and gravel from the river bed, integrate seamlessly with the natural landscape. The interiors, designed by Sarah Foletta, feature a restrained, natural, and robust selection of materials and furniture, contributing to a comfortable living space naturally cooled by the earth walls and the meter-deep sand hill. The rammed earth construction process involves filling a framework with damp earth and compressing it, resulting in a strong, naturally pigmented, and beautifully striated wall. While rammed earth alone may not offer optimal thermal performance, its combination with earth-sheltering creates a sustainable solution that utilizes abundant local resources and minimizes the need for mechanical heating and cooling systems, showcasing an innovative approach to remote Australian architecture. #RammedEarthArchitecture #EarthShelteredHomes #SustainableDesign #AustralianArchitecture #LuigiRosselli #PilbaraRegion #EcoFriendlyHomes #ThermalMass #CorTenSteel

In the pursuit of sustainable architecture and green building practices, innovative solutions are constantly being explored to minimize environmental impact while maintaining aesthetic appeal. One such advancement is the utilization of stormwater collection to irrigate Living Walls. A compelling case study from Sempergreen Europe highlights the significant potential of Living Walls in transforming urban landscapes and promoting water conservation, as exemplified by the Enni Headquarters in Moers, Germany. Enni, an energy supplier based in Germany, features a Living Wall spanning an impressive 650 square meters (approximately 7,000 sq. ft.) at its new office headquarters. This design is notable not only for its scale but also for its ingenious use of harvested stormwater as the primary irrigation source. The system incorporates a smart backup connection to the building’s water supply, ensuring continuous irrigation. When the water level in the cistern drops below a critical point, an internal floater device automatically switches to the building's water supply until the stormwater reservoir is sufficiently replenished. The cornerstone of this stormwater harvesting system is a substantial underground cistern with a capacity of 20,000 liters (5,283 gallons). This reservoir is strategically located outside the building and buried at least 2 meters below soil level to efficiently store rainwater collected from the building's rooftops and surrounding areas, while also protecting it from daily traffic. To ensure the quality of the water and protect the Living Wall, a robust pump directs the stormwater through a comprehensive filtration system. This system includes an initial filter to remove larger particles, followed by smart irrigation components that ensure precise and efficient water distribution to the plants. Given that the Living Wall operates on a recirculating system, thorough filtration is paramount. Gutters on the facade, designed to collect runoff, may accumulate rust, which necessitates an additional filter to refine the water before it re-enters the recirculating tank, thereby removing rust and any residual fertilizers. On average, Enni's Living Wall consumes approximately 2 liters of stormwater per square meter per day, which equates to about 1/2 gallon per 10 square feet daily. While this consumption rate is remarkably low, challenges can arise during hot summers, affecting both water consumption and rainfall collection. During such periods, the freshwater building connection becomes crucial to supplement the stormwater supply and maintain the plants' health. Various factors, including wind impact, sun exposure, plant type, and time of year, can influence the water usage of Living Walls. Realizing Enni's innovative vision required collaboration with a water engineer. In Germany, where comprehensive water collection, including blackwater, is a standard practice, such coordination aligns perfectly with their expertise. The success of Enni's stormwater harvesting system underscores the importance of interdisciplinary collaboration in advancing sustainable architecture. The Living Wall is also equipped with moisture sensors to monitor plant health and track water consumption, providing valuable data for long-term sustainability. Temperature sensors address fluctuating water temperatures; when the tank water drops to 2-4 degrees Celsius (36-39 degrees Fahrenheit), an electric heater activates to warm it to a plant-friendly 10 degrees Celsius (50 degrees Fahrenheit), ensuring healthy roots. Historically, Living Walls have sometimes been perceived as high-maintenance in terms of energy and water. However, this project demonstrates that with an appropriate Living Wall system and a sophisticated irrigation design, they can effectively compete with alternative coatings and claddings in net-zero or low-impact buildings. Enni’s Living Wall stands as an inspiring example of how creativity, collaboration, and advanced technology can transform urban spaces into green oases, contributing to a greener and more resilient future. #SustainableArchitecture #LivingWalls #StormwaterHarvesting #GreenBuilding #WaterConservation #UrbanGreening #SempergreenEurope #EnniHeadquarters #MoersGermany

This blog post highlights the significant contributions of Grafico, a printing company, during 'Courtyard Week' on a renovation show, focusing on their innovative wall solutions. Grafico partnered with two competing couples, Jesse & Mel and Mitch & Mark, to deliver custom-printed wall finishes for their outdoor spaces. Jesse & Mel's winning courtyard prominently featured an 8.5-meter high wall adorned with 'Mosaico Digitale.' This particular product, custom-printed by Grafico, utilizes bio-resin mosaic tiles, which are noted for their lightweight properties and versatility. The unique aspect of 'Mosaico Digitale' is its exclusive Italian-made technology that enables almost any image to be printed onto these tiles. Furthermore, the shape of the tiles is customizable, and they are suitable for various applications, including indoor, outdoor, and even wet areas, demonstrating a high degree of adaptability and design flexibility. The judges were particularly impressed with the outcome in Jesse & Mel's courtyard. Simultaneously, Grafico collaborated with Mitch & Mark, providing them with 'Palm Breeze' Outdoor Wallpaper. This wallpaper was specifically designed to wrap over existing Colorbond cladding, contributing to a 'Palm Springs'-inspired aesthetic for their courtyard. This installation was equally challenging, given its height of over eight meters. The Grafico team successfully completed the installation of both extensive walls in a remarkably short timeframe, specifically less than 24 hours, showcasing their efficiency and skill under pressure. The blog post emphasizes the intensity of 'Wall Week' and the demanding nature of these large-scale installations. The article also includes a mention of a video episode featuring Damian from Grafico, detailing the behind-the-scenes action of 'Wall Week,' inviting readers to explore the process further. It concludes by encouraging readers to subscribe to a newsletter for updates and offering a discount on future orders. The overall focus is on the successful implementation of high-impact, custom wall treatments in a competitive design environment, showcasing Grafico's specialized capabilities in custom printing for architectural and design purposes. #WallWeek #Grafico #CourtyardDesign #MosaicoDigitale #BioResinTiles #PalmBreezeWallpaper #OutdoorDecor #CustomPrinting #TheBlock