Natural Building 101. Ben Graham

Transcription

1 Natural Building 101 Ben Graham

2 What is Natural Building? Any building system that puts ecological and social health above all.

3 Sustainability matrix what does sustainable/green mean? Better than the other Avoiding disaster Sustainable Restorative Regenerative Natural Building

4 Natural Materials Methods TimberFramin g Pole Framing Embodied Energy Stone Where it comes from - Bioregional walling Its Raw embodied from farm, energy forest, - Life quarry cycle analysis,embodied or found Granitecarbon Effect on the wood-stone-clay-sand-lime environment - Health inducing, Limestone regenerative Effect on economy grass-reed-straw - Good jobs, life cycle costs Slate Lightly processed clayboard-strawboard-cellulose woodchips-lumber Heavily processed concrete-steel-glass-fiberglass durisol Bioregional Map Cob Earth Block Wattle & Daub Strawclay Woodchip clay Strawbale Cobwood

5 Natural Building Methods Structure Timberframing & small diameter round wood framing Earth walling - Earth block/cob Stone Insulation Strawbale walls Light-clay wall infill - straw-clay, woodchip-clay Roofing Thatch roofing Wood shingles Slate Finishes Clay and lime plasters and floors Reed mats, branch work, wattle and daub Clay, milk and lime paints Oil and wax sealers. Hand crafted, Community supported

6 Timber framing [small diameter rounds]

7 Earth walling [earth block - cob]

8 Stone

9 Strawbale walls

10 Light-Clay [straw-clay, woodchip-clay]

11 Thatch - Wood shingle - Slate roofing

12 Clay and Lime plasters and floors Vapor Permeance at 1 of plaster Cement Cement/lime Clay/lime 4-7 perms 7-14 perms 18 perms

13 Clay, Milk and Lime paints Oil and Wax sealers

14 Hand crafted, Community supported

15 Improving Energy Efficiency with Natural Materials Longevity - Durabiltiy Specific heat capacity Thermal performance with moisture Breathability

16 Longevity - Durability The 100+ year old building

17 Specific Heat Capacity In Natural Buildings External Air Lightweight Module Internal Air Heavyweight Module Internal Air

18 Thermal performance with moisture Hygroscopicity - the ability of materials to absorb and release water as water vapor as the relative humidity of the air changes.

19 Breathability Water vapor permeability hygroscopicity capillarity

20 Natural Buildings are Healthy Buildings

21 Low Impact Priorities Human behavior Education is the greatest potential for reducing impact Planning and site locating Appropriate need Utilization of existing developed land and materials Closing and balancing the cycle on Imports and Exports Recycling construction left-overs(was waste) On-site water & energy cycles Energy use Building process 20% Renewable energy(noncombustible) Local human/renewable power Local materials Energy and Maintenance 80% Renewable energy Conservation, Energy efficiency

22 Integrative Design Mutually Beneficial Relationships Building process - embodied energy, intention Relationship to site - materials, climate, ecology Living systems Energy - passive, current, abundant sources Water - short, closed cycles Food production and cycling - stacked functions Many fields of knowledge create integrated understanding Biology - Physics - Ecology - Geology - Chemistry

23 Deep Benefits of Natural Building Balancing carbon cycle and focus on all renewables Use and support of current farm/forest industry Ability to address social resilience as well as ecological Reconnecting to the natural world

24 Deep Benefits of Natural Building Balancing carbon cycle and focus on all renewables

25 Deep Benefits of Natural Building Use and support of current farm/forest industry

26 Deep Benefits of Natural Building Ability to address social resilience as well as ecological

27 Deep Benefits of Natural Building Reconnecting to the natural world

28 Evolving Methods Building on traditional knowledge base. Focus on innovation. Incorporating ideas from surrounding fields to make more responsive and accessible solutions. Hyflex sprayer

29 Evolving Methods Air sealing in strawbale wall systems

30 Emerging Design Pallet Fired clay blocks Clayboard Wood fiber batts Hempwood batts Wool insulation batts Fungus insulation Bark siding

31 References Davis Langdon - Embodied Carbon Earth Construction Handbook by Gernot Minke: WITPress Natural Building Technologies - Breathability in buildings Building Science Corp. - Building science for strawbale buildings Heating assessment of a SB building - Carol Atkinson MSc Arch:AEES