The grain of the week
Board-formed concrete records the exact timber it was cast against. We stopped treating that as a defect and started treating it as a signature.

Pour concrete against sawn timber and it will take the grain of every board — the knots, the mill marks, the small violences of the week the shuttering was made. Most of the industry spends money to erase this. At The Plinth we spent money to keep it.
An honest surface
Board-formed concrete is unforgiving. There is no second coat, no sanding back, no correction. What the wall records, it records permanently. That is precisely why we use it: a material that cannot lie about how it was made keeps everyone who makes it honest.
A material that cannot lie about how it was made keeps everyone who makes it honest.
We milled the spruce shuttering on site and built four full-height sample walls before we let the first structural pour proceed. The grain you read in the finished museum is the grain of a specific week in a specific spring. The building is a hundred years old the day it is cast.
Begin at the line.
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