Chapter one
Gable verges on flint and brick houses
Flint walls give a gable verge little margin, so the way its edge tiles are fixed decides whether the next gale lifts them.
A gable end is where a roof stops at a wall instead of draining into a gutter. The sloping edge there is the verge, and the wind gets under it before it reaches anything else on the roof. The character appraisal for Nutbourne West lists flint with red brick dressings among the local building materials, and a flint wall has an uneven face. A verge bedded in mortar on an uneven wall head can crack, loosen and let the edge tiles lift. That makes the join between roof and wall worth a close look on any house of this kind.
At a glance
- The verge is the roof's sloping edge at a gable
- Bedded tiles and fittings now carry mechanical fixings
- Dry-fix verge systems are tested to BS 8612:2018
1.1 What we check at the gable
We start from the lane, then go up a ladder, checking for cracked or missing mortar along the verge, tiles that have tilted away from the wall, and slipped undercloak, the strip of tile or slate laid beneath the verge edge to throw water inward. In the loft, daylight at the gable or a damp stain on the rafter beside the wall shows where water has been coming in. We also inspect the top of the wall itself, since water that enters there runs down the inside of the flint and shows up much lower. Each fault is photographed and sits with the written quote.
1.2 How a verge is fixed now
Mortar has not been banned, but since the 2014 revision of BS 5534 it is no longer trusted to do the job alone: Marley's guidance is that anything bedded in mortar should also be screwed or clipped down. For single-lap tiles Wienerberger asks that each tile have no fewer than one mechanical fixing, on top of whatever the site demands once its location and wind exposure are assessed. A different route is a dry-fix verge, held by clips and tested to BS 8612:2018, with no bed of mortar to crack. Where the existing tiles are sound, we re-fix them rather than replace them. Our pitched roofing page explains the wider options.
Sometimes the problem sits one course lower. If the flint at the gable head has itself loosened, a handsome new verge on top simply moves the failure along. At that point we stop, photograph the wall and tell you the mason's repair has to come first, because a verge is only as sound as what it sits on.




