The short answer
Stone roof tiles are stolen because genuine old Cotswold stone is scarce and costly to replace, so second-hand slates sell. Cotswold District Council's 2000 guidance names theft as one route by which old buildings lost their stone. You protect a roof by photographing it, locking away ladders, covering stored stone and mending slipped slates early.
Why thieves go after old stone slates
A roof of Cotswold stone slates is made of a material you cannot simply order by the pallet. Demand for second-hand slate is the root of the problem. Cotswold District Council's 2000 technical note for owners says the appetite for reclaimed stone has seen many old buildings lose their roofs, and that on occasion the stone was simply stolen. It steers owners to new slate for repairs for that very reason.
On its own website the supplier Cotslay calls fresh-cut and salvaged Cotswold stone alike scarce and dear. That comes from a seller with something to sell, so weigh it accordingly, but it matches what owners find when they ask for a repair price. Checkatrade's 2026 slate cost guide quotes roughly £160 to £210 per m² for stone, and the figure rises or falls with the stone's origin, new against salvaged, and your area. It is a general stone figure and says nothing specific about the Cotswolds.
With numbers like that, the motive is easy to see. A weathered slope is a stack of saleable material, and a thief with a ladder can carry away a good deal in an evening.
Which roofs and which slates are at risk
Thieves want an easy job where they are unlikely to be seen. Barns, outbuildings, garden walls capped in stone, empty houses and roofs set back from a lane are the obvious targets. A low lean-to or garage in stone slate can be stripped from a short ladder. A tall house on a busy street is harder.
The slates differ in value, too. A stone roof is built from graded courses, with large slates at the bottom and small ones near the top, and each size has its price. The council note says the biggest slates, which run to about 750 mm, form the double course at the eaves. Those are within reach of a ladder, and they are the ones a buyer wants. Dressed blocks used as stone ridge tiles are heavy and hand-cut, which makes them valuable as well, though awkward to carry.
Telling theft from weather
A gale can strip slates too, and the two can look alike at first glance. Slates taken by hand tend to leave neat gaps and no debris. Slates shaken loose by weather leave broken pieces below. Scuffs on the eaves, disturbed lead and ladder marks on a wall are worth photographing before anything is tidied.
Recording your roof before anything goes missing
The least costly protection is a dated record. Walk round with a camera and photograph each slope, the ridge, every verge (the roof's finished edge at a gable end) and every outbuilding that carries stone. A set of clear pictures lets you show an insurer or the police what was there. Keep a second copy away from the house.
If stone has been taken off for a repair and stored, list it. Note the rough count by size and where it sits. A pile of unlabelled slates behind a barn is the kind of thing that vanishes without anyone noticing the day it goes.
For a firmer record, a roof survey will do it. MyBuilder's 2026 inspection guide puts a survey at £150 to £500. A survey from us brings pictures of the roof itself, plus a written note of anything loose, missing or already disturbed, which makes any later comparison simple. Read your own insurance wording or ask your insurer, rather than assuming that stolen roof slates are covered.
Making a stone roof harder to rob
You cannot hide a roof, but you can slow a thief and make the job visible. Lock away ladders, poles and tools, because thieves often use what is left out. Cut back anything that screens a gable or outbuilding from the road, and put light on the sides that face a lane or a field.
Do not stack reclaimed slates against the wall of the building they came from. Keep them under cover, out of sight of the road, behind a lock. Where scaffold stays up for weeks, ask your contractor how the lower lifts will be made secure when the site is empty.
The state of the roof counts as well. Slates that are tight and properly pegged are harder to lift than a slope that has slipped and loosened. Our answer on whether sandstone slates can replace limestone ones explains why a replacement for stolen stone has to match the geology of the rest, not just its colour.
Replacing stolen slates and the consent question
If slates have gone, stop the water first. A tarpaulin or temporary sheet over the gap holds for a short time only. Then report the loss and keep your photographs.
For the repair itself, English Heritage policy, as the council note reproduces it, prefers new stone slate to second-hand wherever possible, and treats reclaimed slate as acceptable solely for the building that supplied it. Manufactured substitutes get short shrift in the same policy, which rules them out for historic buildings. So the usual answer to stolen stone is new slate matched to the roof's own stone in rock type, colour, grain and dimensions. Our guide to reclaimed or new stone slates goes through the sourcing question.
Planning comes first on a listed house or in a conservation area, so speak to Stroud District Council's team before replacing anything. The district has 41 conservation areas, and listing covers every part of a protected building.
Ring 01453 933613, or send pictures of the damage by WhatsApp or the enquiry form. Once we have surveyed, you receive a written quote that takes in scaffold, replacement stone, labour, rubbish removal and repairs to anything disturbed. We deal with the Building Regulations notification on notifiable jobs, and a written guarantee of 10 years covers our workmanship. For the full range of stone work, see the Cotswold stone roofing page.