1 August 2026

Ridge tiles loose or porous? How to spot it from the ground

Mortar crumbs in the gutter and a tile that rattles in the wind: the ridge gives itself away. What you can safely establish yourself — and why you never climb up there.

The ridge is the highest line of the roof and catches the full wind. The signs that the ridge tiles — the half-round tiles capping the two roof faces — are coming loose or turning porous are easy to spot from the ground: a rattling or clattering sound in strong wind, a tile sitting askew or shifted out of line, crumbs of mortar in the gutter or on the pavement, and in the attic a strip of daylight or a damp patch at the top of the roof.

The causes are usually one of these three. One: the mortar that fixes older ridge tiles dries out over the years and crumbles — the tile still sits in place, but loose. Two: a storm has lifted or shifted one or more tiles. Three: the tiles themselves have turned porous; they absorb water and crumble further with frost. On newer roofs, by the way, the ridge tiles no longer sit in mortar but are fixed with screws and clamps to a ridge batten (a 'dry ridge'): that fixing can come loose in a storm too, only then the tell-tale crumb trail is missing — so looking remains necessary.

Why you shouldn't leave this: an open ridge is a water entry at the highest point of the roof. The water runs down under the tiles along beams and underlay and comes in at a spot that says little about the source — exactly the kind of leak that is hard to trace. On top of that, wind gets grip on a loose tile: the next storm makes the damage worse, and a falling ridge tile is heavy enough to cause serious injury.

What you can do yourself happens from the ground and in the attic. After every serious storm, walk around the house and scan the ridge line with binoculars: do all tiles sit tight in one line? Check the gutter and the ground for mortar crumbs, look at the ridge from inside the attic and photograph what you see — that saves the roofer search time later. How to follow the water trail indoors is covered in tracing a roof leak yourself.

Climbing up to the ridge yourself is off the table: it is the highest point of the roof, with nothing to hold on to, and refitting or repointing is a professional's job. Refixing loose or porous ridge tiles falls under roof tile replacement and costs € 125-350 per repair. If you're not sure the ridge is actually the source of your damp patch, professional detection at € 90-250 is the safe route. All guide prices are in the price index.