Sacrificial / replaceable wear components

Designing the cheapest, most exposed part (sill boards, splash boards at grade) to be the one that wears and gets replaced, rather than the structure behind it.

Cost

Low

Upkeep

Occasional

Skill to build

Basic

Lifespan

Deliberately short and variable by design, the point is these parts are meant to wear out and be replaced (5-15 years typical for exposed sill/splash boards) so the structure behind them doesn't have to

Embodied carbon

Low

Space / material use

Low

Output timing

On-demand/controllable

Skill to repair

Basic

Note: Cost, carbon and footprint are rated against the other options for this same need, not in absolute terms.

Inputs

none

Outputs

none

What this page does not tell you

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.