Straw coated in a clay slip, packed around a frame; combines insulation with some thermal mass and vapour permeability.
Cost
Low
Upkeep
None
Skill to build
Intermediate
Lifespan
50-100 years if kept dry, similar moisture-dependency to straw bale
Embodied carbon
Low
Space / material use
Medium
Output timing
None
Skill to repair
Basic
Regulation (FR example)
New construction falls under RE2020, which sets thermal and carbon performance thresholds for the building as a whole rather than approving individual materials.
Note: Cost, carbon and footprint are rated against the other options for this same need, not in absolute terms.
What your site needs
Reliable moisture management, same caveat as straw bale
No sizing or quantities: how much a technique yields, and how much a household needs, both depend on the build and the people, so the catalogue compares options rather than dimensioning them. It carries no bill of materials and no build sequence, and it is written for an oceanic, clay-soil climate (Normandy, France). Regulatory notes are indicative and need confirming locally.