As discussed in this article, "iron oxide gives the brick a red color upon burning when there is excess oxygen available, and dark brown or even black when oxygen is insufficient." Below ...

Antique York stone slabs uncovered from the garden are given a crisp, modern edge with slate-grey engineering bricks ... Instead of facing a dark little well and entering the garden by a set ...

The founder of MW Architects used black-blue engineering bricks to add an extension of just seven square metres to his renovated London home. Previously, the central hall of Matt Wood's narrow ...