Seed Eco-Home Materials Cost Reduction

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Check.pngSolar Concrete + 3D Printing + CEB - $35300 Savings

From MJ_Sublimation_Log#Fri_Sep_16.2C_2022

How to integrate 'scalable' = market rate with redevelopment, where ghetto is not market rate? Redevelopment needs to be brought up to economic power from internal means as community value increases. The process is really a wealth issue, not a housing issue. Thus, we must develop wealth within communities. That can include training the local community. Perfect place for hardscape via Solar Concrete, and 3D printing for vinyl siding, geogrid, plumbing, nonstructural lumber, gutter, roofing, and more. Work with us in low cost hoods, at $30k houses. To get there, we need a detailed cost analysis of trash + Solar Concrete + CEB. This must be sold. $2M investment - master's students or engineers to develop: $5k CEBs (walls cost half as much), $20.5k 3DP ($5k siding, $3k nonstructural wood including 30 interior wall modules, $1k electrical, $1k plumbing, $2k doors, -1k windows, $3k trim, $1k perv pave driveway, $1k Ballast PV Mounting roof mount -$1k for OSB, Carport OSB - $500. Trusses - $2k (steel). $29.5k. Landscaping hardscape: -$2k. Exactly 50% less cost.

Total $23k for these relatively low hanging fruit materials:

Solar Concrete -$6400

  • -$2k gravel
  • -$200 roof ballast
  • -$2k concrete
  • -$2k hardscape/driveway

CEB - $3000

  • -$3k walls structure

3D Printing - Wood-Plastic Lumber Composite and Components - $25.9k

Basic figure of feasibility is 20 lb/day Supervolcano-style extruder print rate per print head. 4-head machine is capable of 560 lb print mass per week. A 12 machine print cluster would thus produce around 3 tons of building materials per week.

See detailed breakdown spreadsheet: [1].

Phases - Low Hanging Fruit - $12.1k Savings

  • -$2k lumber blocking
  • -$3k nonstructural infill of excess framing
  • -$1k interior wall modules - are all non-load bearing and can be substituted immediately
    • Includes PEX holders, electrical boxes, pvc holders, wire holders next to boxes, other known wire holders for main utility channel; penetrations; fans; through-wall fans; knockout adapters; pvc; pvc adapters; etc.
  • -$3265 in trim [2]
  • Geogrid - $472 [3]
  • Geotextile - $250 actual [4]
  • -$500 PV mounting. Plastic-metal composite - rebar with 3D printed shell
  • -$100 for sewer tap
  • -$500 - landscaping block
  • -$1k - pervious pavement for driveway. See Pervious Pavement Blocks, which are $5k per house so this is -$5k off the higher quality version.

Minimal Research Needed - $1.5k Savings

  • -$500 plumbing
  • -$500 electrical conduit
  • -$500 rest of electrical (boxes, mounts, other fittings)

Heavier Research Needed - $13k Savings

  • -$1k interior insulation
  • -$3k vinyl siding
  • -4k - windows. Requires gas filling, but argon is not much better than dry air [5].
  • -3 k - Doors
  • -1k - roofing instead of membrane

R&D Investment into 3D Printing Plastic Recycling

Note the infrastructure requirements:

  1. Off-shelf shredder - $20k
  2. Off-shelf filament maker - $30k -
  3. 12 4-head printers @$4k each, high T chamber @20 lb/day/head = 960 lb/day capacity - $48k.
    1. MVP: smaller printer, $2k - $24k
  4. 4 engineers and 4 builders for 1 year cost = $800k staff. See R&D Budgets of 3D Printing Companies. ROI of ~$25k/house=$1Mk/year at the 24 person operation assuming 50 houses/yr.