Ridge tile shapes
Half-round or angled ridge tiles: what is the difference?
The short answer
A half-round ridge tile has a curved top like a section of pipe, while an angled ridge tile has two flat faces that meet at a sharp peak. Both seal the crown of the roof and both can be mechanically fixed. Choosing between them is mostly about echoing the existing ridge and the tile beside it, not about one shape performing better.
What separates the two most common ridge tile shapes, how they look, and which to pick for a repair or a re-roof.
Two shapes along the same line
Capping tiles cover the join where two slopes meet at the crown of a roof and keep rain out of it. The half-round tile is an arch, curved from side to side, so its section looks like half a pipe laid over the line. The angled tile is formed from two flat faces that rise to a crisp peak, a bit like a small roof of its own.
Other profiles exist, including the bonnet shape sometimes used on hips of clay roofs, but half-round and angled cover most of what you see on houses along this coast. Which a house has depends on the age of the roof, the tile it was built with and what the manufacturer made to go with it.
Binoculars from the pavement will show which you have. If the top edge looks like a smooth hump, it is half-round. If it forms a peak with a visible fold, it is angled.
How each shape looks on a roof
The half-round tile gives a softer, rounded skyline that suits traditional clay roofs and the look of older cottages and villas. The angled tile makes a cleaner, sharper line, and it sits comfortably on flat-faced interlocking concrete tiles and on modern estates.
None of that is a rule. Plenty of old roofs carry angled clay ridges, and plenty of newer ones have half-round caps, so the best guide is the tile sitting beside the ridge. A smooth hump over a boldly profiled pantile can look odd, and so can a sharp angle over a plain clay roof. The ridge should look as though it belongs to the roof, not as though it was added later.
Colour and finish matter as much as shape, and our guide to matching ridge tiles explains how weathering changes a tile, which is worth knowing before you choose a replacement.
Does one hold better than the other
Neither shape has a clear edge against wind or rain. What holds a ridge on is the fixing, not the profile. Whether the tiles are bedded in mortar or clipped to a dry rail, each one has to be tied back to the roof structure, and that applies equally to both.
The 2014 revision of BS 5534 dropped mortar as the sole hold for ridge and hip tiles, and Marley says every bedded tile and fitting should carry a mechanical fixing. A well-fixed half-round ridge will outlast a badly fixed angled one, and the other way round, which is why the question to ask any roofer is how each tile is held, not which profile is nicer.
If you are considering a dry system, check the maker's data sheet. Kits are made for particular profiles, and a rail and clip set designed for an angled tile will not suit a half-round one. Our guide to dry ridge systems explains how those parts fit together.
Matching when only some tiles have gone
When a few tiles are missing, the replacements must share the same profile, or the run will look broken. Mixed shapes along one ridge are a common result of earlier repairs, and they usually show from the street as a sudden change in the line. Hips often use the same shape as the ridge, so the whole system of lines looks consistent.
It helps to measure instead of guessing. Width across the base, length of each piece and height of the arch or peak all matter, and a tile a fraction too wide will not sit against its neighbour. Photographs taken square on from the ground, plus a dimension or two, let a roofer check for a match before going near the roof.
If the exact shape is out of production, a reclaimed or near-identical alternative may still exist. When none works, replacing the whole run with one consistent profile is usually neater than a patchwork.
Choosing for a re-roof or a rebuilt ridge
On a new roof, the ridge tile usually comes from the same range as the main tiles, so the shape is often decided by the range you pick. Where there is a choice, think about the look from the street and the way the ridge meets the gable end, because the end piece and any hip tiles need to match.
In a conservation area or on a listed house, keeping the original shape is the safer course, and Arun District Council's planning team, or the council for your area, can tell you whether a change needs consent. On any home, the shape is a small decision beside the fixing method, and our guide to fixing ridge tiles covers that part.
The full range of this work is on our ridge tile repairs page. We survey the roof, photograph the ridge and tell you plainly what is there and what it needs.
Related questions
Ridge shape questions
Is an angled ridge harder to bed than a half-round one?
Not in any way that changes the result. Both need a clean surface, a full bed where mortar is used, and a mechanical fixing through or over every tile. The difference in effort is small, and a careful roofer will get a neat line with either profile.
Can I swap a half-round ridge for an angled one?
It is possible, but it changes how the roof looks, and the end pieces and hip tiles would need to change with it. On a listed house or in a conservation area, ask the council's planning team whether the change needs consent before you commit.