Lifecycle Assessment (LCA) is a methodology used to evaluate the environmental impacts of buildings, products, and materials at all stages of their lifecycle. It looks into resource use, pollution, waste, toxicity to air, water, land, humans and ecology, energy and carbon used for extraction, transportation, and manufacturing, and maintenance, demolition, recycling, and waste disposal. Lifecycle Costing (LCC) is a method to assess the financial impacts of buildings, products and materials at all stages of their lifecycle, including the cost of extraction, transportation, production and construction, maintenance, and replacement. In Denmark, from 2023, LCA will be obligatory for all new buildings with more than 1000 square meters. LCC and Whole Life Costing (WCC) are important to consider the long-term costs and benefits of design decisions, and to take into account the resale value of dismantled building elements for reuse in the future. LCA and LCC are useful to understand and evaluate the impacts of material choices, and make more informed decisions.

Key points in material selection include aligning with the environment, socio-cultural factors, and economics, while also focusing on local availability, craftsmanship, and construction methods. Priority lies in minimizing resource use, opting for non-toxic, low-energy, and low-carbon materials, like carbon-sequestering timber. Attention to human health and regional construction practices is crucial.

Local availability and climatic suitability often dictate material choices. Investigate local artisans, existing solutions, and production processes for improvements.

To prevent over-harvesting, explore nearby renewable material sources with clean extraction. Certified materials, like FSC timber, uphold sustainability.

Reuse is paramount; existing structures and materials should be considered first. Urban mining views buildings as material banks, advocating for reuse and repurposing of anthropogenic materials. To source reused materials, create a harvest map detailing resources from demolished buildings, recycling centers, and local surpluses.

Natural materials are found in nature and can be used for structure elements, roofs, insulation, external and internal cladding or furniture. Renewable materials are those that can be easily replenished, such as timber, fax, cork, hemp, cob, stroke, grasses, salt, bamboo and seaweed. Non renewable materials should be natural and abundant, such as stone, earth, clay, sand or organic slightly processed materials. Biogenic materials sequester carbon and absorb more CO2 than they produce in extraction and manufacturing. Recently, there has been an approach to natural materials that focuses on innovation in cultivating, breeding, raising farming or growing future resources, such as wood foam, bio polymers, and fungal mycelium. These materials are cost effective, biodegradable, and have high insulation properties, flame resistance, and a favorable indoor climate

Circular materials are part of circular material flows which promote reuse and reversibility. This includes adaptive reuse of deteriorated abandoned buildings or other existing structures, urban mining, and reclaiming materials for reuse in place or elsewhere. Recycled materials are reprocessed into products, materials and substances, while upcycling and downcycling involve transforming and reinventing ordinary objects into extraordinary elements. Reusing materials can reduce demand for primary resources, reduce carbon emissions, and minimize the amount of waste generated in the future. Reuse and recycled materials can be found in reuse material shops, second hand shops, or online platforms, and a harvest map can be created to show accessible sources of construction waste or other materials.

The talk focuses on the crucial role of building fabric, also known as the building envelope, which remains relatively constant over time but holds immense influence over a building's comfort systems. This envelope acts as a shield against external weather conditions and microclimates, encompassing factors like solar radiation, wind, precipitation, temperature, and humidity. As our climate undergoes shifts, the quality of the building fabric becomes even more vital. It has the potential to greatly reduce the reliance on heating, cooling, lighting, and ventilation systems, effectively minimizing energy consumption and carbon footprint. Essential elements for designing in response to climate changes include weather protection, insulation, air tightness, and moisture management. Moreover, design choices should incorporate aesthetics, accessibility, and materials.

• Options like sealed and permeable systems exist for effective weather protection.

• Insulation is a cornerstone consideration, recommending thicker insulation for colder climates and strategies like the passive house standard for comprehensive energy efficiency.

• Airtightness is paramount in temperate and cold climates to prevent heat loss, while a balanced ventilation system ensures optimal indoor air quality. Managing internal moisture is equally vital to avert issues like mold growth and material deterioration.

• Incorporating thermal mass, whether structural or non-structural, can enhance a building's capacity to absorb and release heat.

Passive House design is an innovative approach in architecture that focuses on achieving exceptional energy efficiency and comfort within buildings. This approach is rooted in the principle of minimizing energy consumption by utilizing natural resources and optimizing the building envelope.

Passive House buildings are meticulously designed to maintain a constant indoor temperature through careful insulation, airtight construction, and efficient ventilation systems. High-performance windows, advanced insulation materials, and thermal bridges reduction are integral components of this strategy. By harnessing solar gains and internal heat sources, these buildings can significantly reduce the need for traditional heating and cooling systems.

The Passive House concept prioritizes a holistic design philosophy, emphasizing the synergy between architectural elements and energy efficiency. Notably, it aligns with sustainable practices by substantially reducing greenhouse gas emissions and promoting long-term environmental sustainability.

Self-sustaining design approaches at their core, these approaches embrace a holistic philosophy that seeks to harmonize human habitats with the natural world while reducing resource consumption and minimizing environmental impact.

Central to this concept is the aim to achieve self-sufficiency, wherein buildings generate their energy and resources, striving for net-zero or even positive energy balance. This involves integrating renewable energy sources such as solar panels, wind turbines, and geothermal systems, coupled with innovative energy storage solutions.

Passive design strategies play a vital role, leveraging the local climate and environment to optimize heating, cooling, and lighting without heavy reliance on mechanical systems. Water conservation is also paramount, employing techniques like rainwater harvesting, greywater recycling, and efficient irrigation.

Materials selection takes on a sustainable ethos, favouring eco-friendly and locally sourced options to reduce embodied energy and minimize transportation impact.

Regional design approaches embody the ethos of contextual sensitivity, blending cultural, climatic, and geographical influences to create structures harmoniously integrated with their surroundings. Rooted in the belief that architecture should respond to local conditions, these approaches celebrate regional materials, traditional craftsmanship, and vernacular styles. By embracing the unique characteristics of a specific locale, regional design fosters a sense of place and cultural identity. It seeks to optimize energy efficiency by harnessing natural resources and climate patterns. Moreover, regional design encourages sustainable practices by minimizing transportation of materials and reducing the carbon footprint associated with construction. Ultimately, it showcases a deep respect for the environment and heritage while offering innovative solutions that resonate with the community and enhance the built environment's overall resilience and longevity.

The microclimate refers to the local climatic condition that exists within a small specific area such as a garden, park or urban street. It is influenced by factors such as the surrounding terrain, vegetation cover, topography and buildings. The urban heat island effect is a phenomenon where urban or developed areas are significantly warmer than surrounding rural areas, typically by several degrees Celsius. This effect is caused by a combination of factors related to human activities, including the construction of buildings and roads, the use of dark surfaces, loss of vegetation and the generation of heat by vehicles, machinery and other sources. Trees and other vegetation provide shade and cool the air through the process of transpiration, so when vegetation is removed or reduced, there is less shade and cooling, leading to higher temperatures. The urban heat island effect can have several negative impacts on human health, including increased risk of heart related illnesses, increased energy consumption and increased air pollution and greenhouse gas emission.

This talk is about passive resilience and atmospheric conditions. It discusses the differences between the atmosphere and climate, and the four factors that make up the atmospheric condition: temperature, humidity, wind, solar exposure, and precipitation. Temperature has a direct impact on energy and efficiency, and passive design techniques such as building orientation, insulation, and shading can help maintain comfortable indoor temperatures. In hot climates, passive cooling strategies such as shading and ventilation can reduce the need for active cooling systems. In cold climates, passive solar heating and thermal mass materials can help reduce the need for energy intensive heating systems. It is important to consider the temperature range for a location when selecting building materials to ensure they are durable and appropriate for the local climate. Energy efficiency can be improved by considering the temperature of a building and using passive cooling techniques.

Designing for climates is the process of designing spaces that are well adapted to the local climate and weather conditions, with the goal of minimizing the building's energy consumption, maximizing indoor comfort, and reducing the negative impacts on the environment. Climate plays an important role in shaping human settlement, as it affects a ways people interact with the environment and the types of buildings and infrastructure that are required to support their needs. Contextual design and place-based design includes the spirit of place, also referred to as a genius loci, which focuses on the unique identity of place and its local natural systems, landscaping and environment. An example of this is the Danish vernacular wing houses and half timber houses, which were designed to withstand the harsh weather conditions in Denmark and were orientated with S facades or SW facades to maximize solar gain and minimize exposure to prevailing winds. Climate is affected by latitude, distribution of land and sea wind systems as well as the altitude of the location, and microclimates refer to the specific conditions and the immediate vicinity of a site such as wind patterns, temperature fluctuations and exposure to sunlight.

Flood mitigation strategies includes raised ground, flood proofing, and strategic retreat. These approaches address the increasing flood risks in developed areas. Retreat strategies involve removing structures from flood-prone zones, restoring natural processes.

• Raised ground, entails elevating land to mitigate flooding risks. Particularly effective in low-lying regions adjacent to water bodies, it functions as a barrier against floodwaters, safeguarding buildings and homes. It can be complemented by other flood protection measures. However, this approach can be costly and requires adaptation to rising sea levels.

• Flood proofing, reduces flood impacts on structures through modifications like elevation or flood barriers. These structural and non-structural measures shield buildings and equipment. Effective flood proofing necessitates meticulous planning and collaboration.

• Strategic retreat, involves relocating communities and infrastructure from flood-prone areas. This curtails flood damage risks, but the process must be well-coordinated to minimize social and economic burdens. Addressing equity and cultural concerns is crucial, as certain communities may be disproportionately affected.

These strategies should be part of a comprehensive flood risk reduction approach, enhancing flood resilience by considering both their benefits and challenges.

Flood retention strategies explores four key strategies: floodable plains, floodable squares, polders, and stormwater infiltration. Unlike defensive methods, these strategies store excess water to mitigate floods, crucial in urban areas with rising surface flooding and compromised drainage. Stormwater infiltration aids flood control by absorbing rainwater into the ground rather than overwhelming stormwater systems.

• Floodable plains act as catchment areas for heavy rain and overflow, doubling as recreational spaces during dry spells.

• Floodable squares are intentionally designed areas that transform into pools during rain, yet serve as urban spaces when dry.

• Polders, reclaimed lowlands surrounded by dikes, protect against floods and enable development, requiring careful maintenance and sustainable practices.

• Stormwater infiltration employs green techniques like rain gardens and permeable pavements to naturally filter and slow runoff.

These strategies underscore the importance of synergy between nature and infrastructure, fostering resilience, safety, and environmental well-being.

Water resilience – hard strategies focus on five primary hard flood protection strategies: sea walls, flood walls, revetments, breakwaters, and dikes. While historically predominant, these resource-intensive approaches aim to resist floods. However, the shift towards resilient alternatives emphasizes the importance of a comprehensive approach. For instance,

• Sea walls can serve as both protective barriers and communal infrastructure, highlighting the potential for multifunctionality.

• Flood walls, akin to sea walls, require integration with softer strategies.

• Revetments, sloping structures along riverbanks, mitigate wave energy and erosion, with design considerations for vegetation and water connections.

• Breakwaters, perpendicular to shorelines, reduce wave energy and storm damage, offering opportunities for biodiversity integration and improved access.

• Dikes, or levees, safeguard critical areas from floodwaters and require stability and ecosystem compatibility in design.

Despite challenges like material intensity and maintenance costs, hard strategies offer some benefits and enduring protection. However, integrating these strategies with softer approaches ensures effective flood risk management.

The United Nations established 17 interconnected Sustainable Development Goals (UN SDGs) to underpin sustainable development with the idea to protect the planet, end poverty and ensure people can enjoy peace and prosperity. All 17 goals are relevant to your architecture project, and in your project you must ensure that you understand their interconnections and relevance to your project and how you can use the goals to understand your responsibility as an architect. At the same time also be aware that the UN SDGS are still based on operating within the current socio-economic growth principles. Instead, the goal of the economy (or human activity in general) should not be to grow but to thrive within planetary boundaries. Your project should explore how we can thrive within our planetary boundaries.

Architects need to prevent building demolition and should transform the existing fabric instead of building new. Low energy retrofit not only reduces carbon emissions, resource use and urban sprawl, but also tackles social injustices (e.g. energy poverty) and energy security. Designing low energy retrofits is not just upgrading for energy efficiency, but also involves:

• Enhancing carbon storage by rewilding and using bio-based materials

• Circular economy principles and use of non-virgin materials

• Future proofing through future climate change adaptation

• Multifunctionality and adaptability, reducing excess floor area and sharing of spaces

• Avoid unintended consequences that affect health and well being or jeopardises the building fabric and that does not materialise energy and carbon reductions.

Architects need to prevent building demolition and should transform the existing fabric instead of building new. Low energy retrofit not only reduces carbon emissions, resource use and urban sprawl, but also tackles social injustices (e.g. energy poverty) and energy security. Designing low energy retrofits is not just upgrading for energy efficiency, but also involves:

• Enhancing carbon storage by rewilding and using bio-based materials

• Circular economy principles and use of non-virgin materials

• Future proofing through future climate change adaptation

• Multifunctionality and adaptability, reducing excess floor area and sharing of spaces

• Avoid unintended consequences that affect health and well being or jeopardises the building fabric and that does not materialise energy and carbon reductions.

Insulation reduces and slows down heat transfer and therefore reduces heat loss in winter and heat gains in summer. This significantly reduces the operational energy and carbon impacts. To design low energy buildings you need to specify materials with low k-values, i.e. thermally insulating materials that reduce heat transfer. Human-made materials often have better thermal conductivity, so less insulation material is often needed for the same thermal performance, but at often a higher embodied carbon cost (i.e. more energy to manufacture). This is why it is important to evaluate the full life-cycle implications of insulation materials should be carefully considered, not only its thermal performance.

Because the design of the building fabric is so important for indoor environmental comfort and reduced energy use, integrating it right at the start of your project is referred to as fabric first principles. This is crucial for passive resilience and low energy design. Understanding the principles of heat transfer (conduction, radiation, convection) aids in designing appropriate climatic design solutions. This talk covers these heat transfer principles and how it affects decision-making about your design in different climates.

For summer and in warmer climates we can use passive cooling strategies, including natural purge ventilation to cool spaces and people. But continuous year-round background ventilation is also needed to remove humidity and safeguard good air quality and occupant thermal comfort. Continuous year-round background ventilation is difficult to provide reliably through natural ventilation. Instead MVHR (Mechanical ventilation with heat recovery) systems are a low energy option, providing controlled extraction of warm, stale air and recovering heat to warm up the fresh air supply. When combined with high levels of insulation and airtightness, this provides low heating needs in a cold and temperate climate – all key strategies for low energy buildings