From the Levels to the Mendip side
A parish that runs from the Levels to the Mendip slope asks different things of a roof at each end.
Height above the Levels is the first thing we weigh in Churchill. A roof on low ground sits in still, damp air and often under trees. A roof higher up towards the Mendip side meets the wind head on, with little shelter between it and the open slope. Both can be perfectly sound when built. They age in opposite ways.
On the high side, wind is the working problem. It lifts ridge tiles, pulls at verges, rattles loose slates and drives rain sideways under the lap of any tile that is not seated. A slipped tile that looks like a small gap from the garden can be letting water onto the battens (thin laths that carry each course) for several wet weeks before a stain shows indoors. We walk the slopes, look along each course for the telltale shadow of a slipped tile, and check the pegs, nails or clips holding the covering.
On the low side, the problem is moisture. Shaded north slopes grow moss and algae, valleys silt up, and gutters overflow behind the fascia without anyone noticing. A tile that stays wet in winter is exposed to frost, and an old clay or concrete tile can flake at its face and let the water through. We look for tiles that have spalled and for gutters that have started to sag.
The point of the survey is to avoid assuming. A re-roof is rarely the first answer, and a repair is rarely the last. We name the parts that are sound, the parts that need attention this year, and the parts that can be left. Wind work on a hillside house usually begins with ridge and verge repairs.



