Slipped Tiles: Why They Move & How to Fix Them Properly
One slipped tile is annoying; three is a pattern. Here's why tiles slip on Lancashire roofs, why nailing alone usually isn't enough, and what a permanent fix actually involves.
Symptoms
- A visible tile out of line on the front elevation — usually most obvious from across the street
- Pieces of tile in the garden or driveway after a westerly gale
- A small section where the tile course looks 'sunken' compared to the rest
- A drip in the loft that started the morning after the last storm
What's actually causing it
- Failed tile nibs — the small rear lugs that hook the tile over the batten snap after decades of freeze-thaw, especially on Marley Plain and 1930s concrete tile
- Rusted nails — Victorian and Edwardian iron nails turn to powder after 80–100 years, especially within 5 miles of the Fylde Coast
- Wind uplift on under-fixed tiles — the original installer relied on the tile's weight alone and west-coast gusts now beat that
- Foot damage from previous trades (TV aerial, satellite, solar) that cracked the tile but didn't replace it
Why it matters
A slipped tile leaves the felt or underlay exposed to UV and wind-driven rain. Modern breathable membranes degrade in months once exposed; older bitumen felt tears within a winter. The fix gets significantly more expensive once the felt fails because the repair stops being a tile job and starts being a strip-and-re-cover.
What to do right now
If a tile is in the garden, photograph where it came from and store it — matched stock is hard to find for older concrete tiles and the original is worth keeping. Don't try to push a slipped tile back from a ladder; it'll fall back out within days because the nib or nail underneath is still broken.
What a proper fix looks like
A proper repair lifts the slipped tile, inspects the nib and the neighbouring fixings, and re-fixes mechanically with a stainless tile clip rather than relying on a replacement nib alone. We always check the two tiles either side of the failure — they're usually the next to go. Coastal jobs use stainless or copper fixings as a default.
What shapes the cost
- Single tile vs section vs full bay re-fix
- Whether the original tile is still in production or needs matched reclaimed stock
- Access — ladder vs tower vs scaffold depending on elevation and pitch
We don't quote prices online for this category of work — too many variables. A free inspection gives you a written, itemised quote with no obligation.