Firth locally the change is held to be at the Tail of the Bank where the river crosses a sandbar off Greenock at the junction to the Gare Loch, or even further west at Gourock point. However, some firths are exceptions. The Cromarty Firth on the east coast of Scotland, for example, resembles a large loch with only a relatively small outlet to the sea and the Solway Firth and the Moray Firth are more like extremely large bays. The Pentland Firth is a strait rather than a bay or an inlet. These are connected to, or form part of, the
Firth Concrete for over 40 years and the business is ISO 9001 Quality Certified. Dricon’s products include: HandiCrete, RapidSet SuperSet and Oxitone, PaveLock, PaveSandTM Firth Concrete Firth Concrete (legal title: "Firth Industries") is New Zealand’s largest and only national concrete company. It produces ready mix concrete under its Certified brand, a large range of concrete masonry (or grey masonry), paving, segmental retaining walls and veneers. It also has a range of bagged, pre-mixed product that is marketed under the Dricon brand. The business from which Firth evolved started at Matamata, New Zealand, in 1865. This original business was established by Josiah Clifton