The short answer
Have a roofer who knows stone inspect the roof before you commit, rather than relying on one sentence in a general survey. Look for slipped, flaking or missing slates, a dipping ridge line, cement patching, and any history of theft or re-covering. Ask the seller who repaired it and when, and whether the stone is original.
Why a stone roof needs its own inspection
A homebuyer report gives a roof a line or two, and on a house under Cotswold stone those lines cannot say much. The covering is hand-sorted limestone, laid in courses that shrink steadily towards the ridge, and it ages in ways a tiled roof does not. Cotswold District Council's 2000 technical guidance puts the load at about 1000 kg for every 10 square metres of roof. All of that sits on the timbers below, so the frame is part of what you are buying along with the stone.
The same guidance says a roof that has been kept up can easily reach a century, and may go much further. Read that as long experience of looked-after roofs, with no guarantee attached, and remember that every roof has its own history. A neglected house can look lovely from the lane while the rafters underneath are quietly getting wet. Our Cotswold stone roofing page describes the repair and relaying work that follows if the inspection finds trouble.
Ask your surveyor to describe the roof in plain terms and to recommend a specialist visit if anything looks doubtful. Such an inspection costs little against the price of the house.
What shows from outside and in the loft
Begin outdoors in good light, and borrow binoculars if you can. Read the pattern of the courses. Long, wide stone sits at the bottom of the roof and small stone at the top, with a gradual change in between. A patch of stone with a different tone, thickness or size points to an earlier repair, and several patches suggest a roof that has been wrestling with a recurring fault.
Sight along the ridge and the eaves for waves and dips. A sag can mean tired timber, slipped slates or old movement that has since settled. Study the chimney stacks, the gable edges and any join with an extension, because water finds these first. On the ground, look for flakes of stone beside the walls.
Upstairs, take a torch into the loft. Darkened or damp timber, pale crusty deposits and soft rafter ends are warning signs. Look for the lime mortar called torching, which sits under the slates on many older roofs. Fresh cement patches, or foam sprayed over the underside, are worth a direct question. Our page on stone roofs on extensions shows how a later addition ought to look beside the original.
Questions for the seller
Most sellers are happy to talk about the roof, and the answers are revealing. Ask when it was last worked on, who did it, and whether invoices survive. Ask if the slates are the originals, stone brought from elsewhere, or a different covering on one section. Ask about past leaks, including the ones that were cured, and where the water appeared.
Ask, too, whether stone has ever gone missing. The 2000 guidance notes that old buildings have been stripped of their slates to feed demand for second-hand stone, occasionally by theft, and a roof patched afterwards can end up with mismatched stone. The edge detail at the gable often gives away a clumsy repair, which our page on stone roof verges explains.
Establish whether the property is statutorily listed, and whether the lane it stands on is a designated conservation area. Your solicitor can confirm a listing, and the local planning team can describe any area controls. Do not take it for granted that earlier roof work had the right permissions.
What a roofer notices that a general report misses
On stone, a roofer's visit is more than a glance at the surface. We look at how each slate is held, whether the pegs or nails have corroded, and whether the stone is splitting into layers. Slates that peel like pastry have little service left in them, and a slope full of them calls for relaying, not patching, whatever the asking price of the house. We also check valleys and abutments, where stone meets another surface, along with the lead that seals them. Equal-sized slates anywhere up the slope point to a past repair, so we read the diminishing courses carefully as well.
You receive photographs of what we found, and a written quote follows. That gives you firm evidence to take back to the seller. If work is needed soon, it is fair to ask for a price adjustment or for repairs before completion.
We lean towards whichever repair is smallest while still stopping the fault. A roof with a few slipped slates and healthy timbers may need a day's work and a sensible upkeep plan, not a full strip.
Money to set aside
We cannot name a figure for a roof we have not seen, and stone varies more than most coverings. Cost turns on how many slates need replacing, how easily the roof is reached, the condition of the rafters, and the choice between new and reclaimed stone. Checkatrade's slate roof guide, updated September 2026, puts stone slate at around £160 to £210 per m² as a national average. That is not a Cotswold figure and nor is it an estimate for your house, but it shows why relaying a large roof is a serious sum.
Scaffolding adds cost of its own, and ladders alone are no way to work on stone. Confirm that each price you receive allows for VAT as well as the scaffold, so that two quotes can be compared fairly.
Keep a reserve for roof work in your first few years of ownership. A modest list of repairs found before you buy is much better news than a surprise after you move in, and it gives you something concrete to discuss with the seller. Our number is 01793 626096. WhatsApp and the website form work as well; give us the address and we will book a visit.