The short answer
Choose the unit that sits closest to the tile you have now, not the tile as it looked when new. Slate roofs usually take a dark grey or black unit, clay roofs a brown or terracotta one, and concrete tiles a grey, brown or red to suit. Where the building has heritage protection, agree the colour with the council before ordering.
Why the match matters more at a verge
Look at the gable end of almost any house and your eye follows the line of the verge, where the roof meets the sky and the wall. A unit that is a shade too pale or too glossy stands out like a patch on a sleeve. That is true on a plain 1980s estate house and doubly true on a terrace where the neighbours' verges are all one tone.
A dry verge is made of factory-moulded units, usually in a coloured plastic or a fibre-reinforced material. The colour runs right through the unit, which helps it hold its tone, but it cannot copy the lichen, the soot and the faded streaks of a tile that has sat in the weather for decades. So the job is to pick the nearest available tone, then accept that a slight difference at first will often settle as the roof and the units weather together.
Matching to slate, clay and concrete
The covering beneath the verge sets the starting point. These are the usual pairings, and the final choice is made against a sample held next to the roof in daylight.
| Tile on the roof | Usual verge colour | What to watch |
|---|---|---|
| Natural or fibre-cement slate | Dark grey or black | Pure black can look harsh against weathered blue-grey slate |
| Plain clay tile | Terracotta, brown or a red-brown blend | Handmade tiles vary, so choose the middle of the range, not the brightest tile |
| Concrete interlocking tile | Grey, brown or red to suit the batch | Older concrete tiles fade; a new unit may look darker for a year or two |
| Pantile | Orange-red or brown | Check the unit's profile as well as its colour |
Makers publish their colour ranges, and most can supply a physical sample on request. Colour names are not standard between makers, so one firm's "slate grey" is not another's. Always judge by the sample, not the name.
Weathering, sheen and the second look
Fresh units are cleaner and slightly more reflective than a roof that has aged. Go and stand at the end of the road in daylight, ideally in cloud as well as sun, and compare the sample with the verge you can already see. Sheen matters as much as tone: a glossy unit against a matt tile draws the eye even when the colour is spot on.
On pitched roofs with a mix of old and replacement tiles, pick the colour to suit the majority, not the newest patch. And if a roofer has refixed the existing units rather than replaced them, the question does not arise at all, so it is worth asking whether the current units can be kept. Our page on gaps under ridge tiles shows the same approach on the ridge, where matching also applies.
Listed buildings and conservation areas
A listed house is protected as a whole, and changing the look of its roof can call for listed building consent. The colour and material of a verge can fall inside that, since the verge catches the eye from the road. A conservation area works differently, yet the council's planning team may still take an interest in the look of the roof along the road. Swindon lists a good many conservation areas, and the Railway Village has an Article 4 direction that withdraws some permitted development rights, so asking is wiser than assuming. The same applies to a cottage in a village conservation area on the edge of the borough, where a plastic verge in the wrong tone would be the first thing a planning officer noticed.
The practical step is simple. Before ordering, check with Swindon Borough Council's planning team, or whichever authority covers your address, and describe exactly what is going onto the roof, including a sample or a photograph of the unit. Many older and protected buildings are better suited to a mortar-bedded verge in a matching mix, fixed mechanically as well, than to a visible plastic unit. Our guide to dry ridge on slate and the page on dry hip systems go into when a dry system suits older coverings and when it does not.
How we handle the choice
At the survey, close-up photographs go in the file: the verge, the tiles beside it, the age of any units already there and the light that falls on that gable. Where the colour is a close call, a sample can be ordered so you can hold it against your own roof before anything is fitted. Nothing is ordered on a guess, and a unit that arrives in the wrong tone goes back rather than up.
Colour is only one of the checks at a verge. The fixing, the batten behind it and the way the first tile is held matter more to how long the edge lasts, so the visit covers those as well. If the units are sound and only the tone is wrong, you will hear that, because refixing what is there is cheaper than replacing it.
Hip finishes and other tile details need the same care, and the page on hip tile repairs covers how a hip is matched. For the wider picture of fixing edges and ridges without mortar, start at ridge and verge dry-fix.
Photographs of your gable ends help before a visit, along with the roof type if you know it. From those we can say which colour families are likely to suit. Once the roof has been seen, a written quote arrives, and our workmanship carries a guarantee in writing that lasts a decade.