Roofs on a slope above a river
Valley ground, shelter and trees change what ends up in the gutters and what stays damp on the north side.
Wrington sits between two kinds of ground, the Mendip slope above and the Congresbury Yeo valley below. Houses in both feel the effect on their roofs, though in different ways.
On the slope, the roofs shed water towards the downhill side. A gutter that is slightly undersized, or has lost its fall, can overflow and send a sheet of water down the wall, which marks the render and soaks the lower courses. On the uphill side, run-off from the ground itself can splash back, and the bottom row of tiles gets wet from below as well as above. Look at the wall beneath the eaves: a green or dark stain in a straight line points to a gutter problem, not a covering problem.
In the valley, the trees are the thing. Trees drop seeds and leaves, and gutters under them need clearing more often than gutters in an open street. A clogged gutter holds water against the fascia board, and the board rots from the top edge. Leaves also collect in roof valleys and behind chimney stacks, where they hold damp against the slates and the lead. Our roof inspections include a look at all of these places.
Shade slows drying. A roof slope that sits in the shadow of trees or a hill will stay damp longer, and moss and algae find it first. Neither does harm as a thin film, yet a heavy crust stays damp against the covering and, once frost gets in, prises up slate and tile edges. We note growth when we survey and tell you whether it needs removing or simply watching.
The aim is to catch faults when they are small. A bracket re-fixed or a gutter cleared at the right time costs very little, and a rotten fascia or a damp wall costs a good deal more.



