Chapter 1: We have a damp patch on the landing of our Arborfield Green house. Where does the water come from?
What we find
A house built in the last decade should not be failing across the whole slope, so a damp patch on a landing or ceiling almost always traces back to one detail. On an estate built in phases, the same roof design is repeated house after house, which makes for consistency but also means one missed detail can appear on neighbouring plots. The usual suspects are the lead tray where an extension roof meets the main wall, the valley where two slopes join, a dry verge cap that has slipped, and the ventilation tiles let into the roof.
Wind-driven rain can also find a gap that stays dry in ordinary showers. That is why the stain may appear only after a storm from one direction, and why it can seem to wander across the ceiling. Water follows the underlay and the rafters before it drips, so the wet patch is rarely directly below the entry point.
What we fix
We trace a leak from the inside first, with a loft inspection and a check of the timbers and insulation for damp, then from outside with photographs of every junction near the stain. The cure is usually small and local: re-fixing a verge cap, replacing a tile, or renewing a lead tray and dressing the lead properly. If the roof is still inside a developer's defects period or warranty, we give you the photo report so you can send it to them before anything is altered.
When water is coming in and cannot wait, we prioritise emergency calls and make the roof safe first, then repair it. Typical UK call-out prices range from £150 to £350 plus materials, with the fixed quote coming after the survey. Our emergency and general roof repairs page explains how we work through a leak.