OSE Microhouse Prototype Build
MicroHouse Genealogy
General Concept
Linked from OSE Microhouse
. Page edited by
, initial design by
Cohabitat Group and final design by Chris Reinhart with adherence to
and
. To be built with
CEB Press IV supported by
Prototype IV,
Prototype I,
Prototype III,
Prototype V and VI,
Prototype I,
Prototype I, industry standard
and industry standard
.
Results from 2013
Ergonomics Concept
We want to press bricks realtime and lay directly into walls. Our goal is to demonstrate that we can produce and lay 5000 bricks into a 400 sf structure in one day with 12 people laying bricks in 4 teams of 2 and another 4 people sliding the blocks on the rollers. Another carpentry crew of 8 breaks into 4 teams that make windows, doors, and roof sections. Another team of 4 inserts the mechanical unit, and the final team of 4 mixes and sprays stucco with a slurry sprayer. So a team of 2 dozen is needed for one day. Foundation is prepared beforehand. Start at 8 AM and press until 5 PM with 1 hour break. Begin roofing at 7 PM and finish at 9 PM including stucco.
Introduction
Factor e Farm is building a prototype Microhouse to demonstrate and document the efficiency of building Compressed Earth Block structures - in order to demonstrate the robustness and efficiency of the CEB construction method. We are considering CEBs as a scalable, high-performance method for building OSE infrastructure - consistent with our Strategic Plan.
We will make a comparison to stick-built methods. We are documenting the time of construction. Compared to stick-frame construction - we are designing for:
- improved thermal performance (both heating and cooling)
- comparable cost
- use of local material sourcing (block + insulation)
- longer lifetime
We will be building a minimalist 12'x12' structure to demonstrate the building techniques - while documenting the process in full technical detail:
- Step by step procedure with diagrams prior to build
- Time required for each step of the build
- Comprehensive cost including materials, labor, and others
- Bill of materials with links to sourcing
- Step-by-step video instructional with technical script
Design Discussion
Discussion between Floyd Hagerman, professional CEB builder, and Marcin Jakubowski.
Notes:
- Spread Footer: 1:50
- Wall 14" wide - double wall with thermal breaks, see Earth Sheltered House and Double Wall Brick Laying with Thermal Break Video
- 2:30 - gravel base,
- 2:50 - pea gravel - 6" wider than footer
Design Rationale
- Breakthrough cost to performance ratio by DIT Collaborative Production. Goal: $4/sf.
- Breakthrough construction time: 2 days with 5 people for every 300 square feet of house space for modular structure
- Preframed door, window, roof. mechanical/kitchen units.
- Modular structure, additions can be made on-demand
- Modular window and door units
- Modular roof structure - long, interconnectable panels with possible skylight.
- Wall-integrated Stove
- CEB Floors
- Double CEB Walls insulated with hammer-milled straw
- Built-in winter-round greenhouse
- Locally milled lumber - after Phase 1
Design
Specifications and Build Plan
- Phase 1: Build foundation for a single free-standing unit of 12'x12' size. Structure has electricity and a provision to connect a water line in the future (water line stubbed out under house skirt insulation. At this phase, no provision for interconnecting further additions to this structure need to be made.
- Build 12'x12' living structure - CEB floor, built-in wood stove, electrical connection
- Siting is north of HabLab
- We are intending to use the tractor, brick press, and industry standard hammer mill (needs to have hydraulic motor and base stand mounted still) for chopping hay insulation
- Phase 2: Building an independent next module - a greehouse module - separated by 8 feet with covered walkway. Allow for water and electrical connection.
Foundation
See also Shallow Insulated Footer
- Shallow insulated footer technique. Works for heated structures to prevent frost heave.
- Inside - poly goes under footer
- Outside - poly goes up footer and under insulation
Walls
Door and Window Detail
Mechanical Unit
Cost Structure
- Cement footer: $100/cu yd
- Insulation: $35/sheet of 2" pink board for skirt - 6 sheets per unit - $200
Design Proposals
Calculations
- Footer: 18" wide, 1 cubic foot of concrete per foot of double wall foundation
Build
First, go to
on the above.
Links
- Aug 6, 2013 Support Equipment Discussion for Microhouse - internal document to build participants due to POC list
- Wall Details from Cohabitat Group - Microhouse_Architectural_Details
- Includes download of MacroHabitat - a CEB house designed by Paweł Sroczyński for OSE.
- Wall Details from Floyd Hagerman - HabLab Build
- OSE_Roof_Instructions - instructions for modular flat roof sections
- How to Build a Brick Wall
- CEB_Architecture_Plans
- Open Source Architecture - TED Talk
- Open_source_strawbale_design
- http://en.wikipedia.org/wiki/Passive_solar_building_design
- http://energy.gov/energysaver/articles/passive-solar-home-design
- Lovins GreenHome 1.0 Factor Ten Engineering Case Study - [1]