Straw bales strapped directly to an existing wall face as external insulation, with minimal supporting framework, a specific low-tech retrofit method, distinct from the generic continuous-exterior-insulation entry.
Cost
Low
Upkeep
Occasional
Skill to build
Intermediate
Lifespan
Matches strapped straw-bale lifespan; as an external, more exposed application, real-world lifespan likely toward the lower end of that range without a well-detailed rain screen over it
Embodied carbon
Low
Space / material use
Medium
Output timing
None
Skill to repair
Basic
Regulation (FR example)
Changing the external appearance of an existing building normally requires a prior declaration (declaration prealable) at the mairie; stricter rules and an architect consultation apply within a protected or heritage perimeter.
Note: Cost, carbon and footprint are rated against the other options for this same need, not in absolute terms.
What your site needs
An existing wall face to retrofit, and a weather-protective render/cladding over the strapped bales
Inputs
none
Outputs
none
Sources
General ITE paille sanglee practitioner durability consensus
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.