Painted Brick and Brick

This shader has the paint amount and colour on a parameter so that you can adjust the material as you desire.

Breeze Block and Concrete Wall

Tarmac and Cracked Tarmac

Tarpaulin

This has a colour and roughness parameter that is adjustable.

Corrugated Metal

This shader has the paint amount and colour on a parameter so that you can adjust the material as you desire.

Chipboard

This has a colour parameter to adjust the material.

Scaffolding Fabric and Mesh Fence

These both have parameters so that the tiling and scale can be adjusted.