Category: Credit: Oliver Wright

Roof collar with grading stamp. C16 timber.

Steel truss with concrete spar sections. From late 1940s and built by prisoners of war.

Bifurcated stair. Poorly lit with no handrails.

Rat trap brickwork. Image showing the bonding bricks where these pass through the cavity.

Rat trap brickwork.

Cable window restrictor.

Bricks removed from an old barrel drain.

Sealed drainage cover.

Blower door. Used for air permeability testing.

Podium deck from 1970s. Asphalt damp proof course (DPC).