On our property, at DPC height there was no evidence of a DPC fitted. The builder Bellway, didn't think this was an issue and said that there would definitely be one fitted even though it was not visible. In the NHBC Standards 2013 6.1 S4, it states that a DPC should not be set back from the edge of the masonry, be of the correct width, and on the image, it shows and states slight projection.
I used the NHBC Resolution Service with regards to this and at the Resolution Meeting, a brick was removed below the DPC height to reveal that there was a DPC fitted but was set-back approximately 10mm from the masonry edge.
In the NHBC Resolution Report I received, it states
"On the date of inspection the builder removed a brick from the side wall of the property below the dpc. The edge of the dpc became visible as soon as the mortar was removed. The edge of the dpc was later measured as being recessed into the brickwork by not more than10mm.
It is common practice to recess the dpc so that the joint can be properly trowelled to a smooth finish. In this instance there is no negative impact of doing so, as it is linked to a radon gas barrier and a cavity tray which cross the cavity to the perimeter of the building. The dpc is achieving its primary function, to prevent rising dampness in the outer leaf brickwork."