Chapter 1: Why are the hip tiles slipping on our 1930s semi in Tilehurst?
What we find
A hipped roof has a sloping corner where two slopes meet, and the row of hip tiles along it is held at the foot by a hip iron, a small metal bracket screwed to the rafter. On many interwar houses the hip tiles were also bedded in mortar and the iron was missing, rusted through or never fitted at all. The weight of the whole row then rests on old mortar alone.
You can see the problem from the pavement. A hip tile that has dropped a few millimetres leaves a visible step in the line, and a gap at the top lets rain run under the covering. In the loft, a damp stain on the hip rafter or a pile of mortar crumbs on the ceiling insulation tells the same story. Wind finishes the job: a strong gust across the hill can lift a loose tile clear.
What we fix
We start by lifting a few tiles to learn whether the clay is sound and only the bedding has failed, as it often turns out to be. Sound tiles are cleaned and reused. Each hip gets a new stainless hip iron at the foot, and the tiles are fixed mechanically rather than trusting mortar alone, in line with BS 5534. Where the roof allows it, a dry-fix hip system on a continuous batten is the neater long-term answer.
While we are at the ridge, we check the end caps and the verges, since those usually share the same age and the same fault. Your fixed quote follows the survey. For scale, reported figures for dry ridge work on a semi sit between £900 and £1,600, with £300 to £900 more for scaffold. Our ridge tile repairs page sets out the choices.