Chapter 1: Why do tiles keep slipping on the steep roof of our old Kingsclere cottage?
What we find
A steep pitch makes every tile hang more than it lies. On a roof that was thatched in the past and later recovered in clay, each tile is held by a nail or a peg through its head into a batten, and gravity works on that fixing all day. Iron nails rust and thin out, and oak or softwood pegs decay in damp spots, so the tile slides a little, then a lot. Roofers call the rusting-nail version nail sickness.
From the garden, you may see a tile sitting a finger-width proud of its neighbours, a gap in a course, or a fragment on the path. Indoors, a brown mark on a first-floor ceiling or a damp patch high on a gable wall often follows a heavy storm. Because the pitch is so steep, water that gets past one missing tile tends to run a long way inside before it shows.
What we fix
We start with the underside. From the loft we check the battens and rafters for rot and look at the underlay (the sheet under the tiles that catches stray water). If they are sound, we open up just the section that has slipped, keep every good tile, and re-fix with stainless or copper nails and, where the roof calls for it, clips on the exposed courses. Our nail sickness guide explains the diagnosis in detail.
Matching tiles are the harder part. Plain clay varies in colour and camber from batch to batch, so we source reclaimed tiles that sit right beside the originals instead of ordering a bright new set. On a steep roof the work is done from a scaffold with roof ladders and a safe working platform, which is part of the quote. Your fixed quote follows the survey, and the wider process is on our pitched roofing page.