Chapter 1: Why are the verge tiles lifting on a newer house near Calcot Place?
What we find
On the estates built since the early 2000s, the edge of the roof at the gable end (the verge) is normally finished with a dry-fix cap or a mechanically fixed under-cloak, rather than a bed of mortar. That is the correct modern method, but it relies on small clips and screws holding firm for the life of the roof. Open ground and the long run of the A4 corridor let a strong wind get under the edge tiles, and a clip that was never driven fully home gives up first.
From the garden you may see a verge tile sitting proud of its neighbours, or a cap piece lying on the lawn after a gale. In the loft the sign is more subtle: a patch of damp batten at the gable, or a tile edge rattling on a windy night. Because the houses went up in phases, one street often shows the same fault in several gardens.
What we fix
We start from the ground with photographs, then go up and check every clip along the affected verge, including the ones beside the loose one. Tiles that have lifted are relaid and re-fixed with stainless steel screws or the correct clip for that tile profile, and cracked caps are replaced with matching ones. BS 5534 expects ridge, hip and verge parts to be fixed mechanically, with BS 8612 as the standard for dry-fix kits, so repairing the fixing is the right answer here, not re-bedding in mortar.
Repair is nearly always the sensible route on a roof this young. A typical UK price for a dry ridge on a semi is £900 to £1,600 with scaffold extra, but a verge repair is far smaller work; the quote you receive is fixed and follows the survey. Our ridge tile repairs page covers the options in more depth.