Roofers in Northleach

A booklet from April 2000, written by the district council for people who own or live under stone slate, still records how these roofs were built. Two limestones supplied the material. Forest Marble could be worked soon after quarrying, while Stonesfield Slate needed frost to open it up. The booklet is old, so we take it as a picture of traditional practice and not of what a quarry can supply now.

Q1.1Why do the stones shrink towards the ridge?

Stone splits into plenty of little pieces for every big one, and the old roofers worked with that, laying each roof from whatever the quarry produced. The largest pieces, around 600 mm long and sometimes up to 750 mm, make a double row along the eaves. The smallest, nicknamed short cocks and only about fifteen centimetres long, finish the slope at the top. That gradual change is what gives a Cotswold roof its soft, graded look, and it is why a repair must follow the existing courses. Slates of one even size laid among them stand out at once.

Q1.2What fixes each stone in place?

Each stone has a hole drilled close to its upper edge, and a split oak peg through that hole catches a batten. Oak pegs wear out well ahead of the limestone, which makes a slipped slate the earliest warning we see. Ridges were traditionally dressed stone, cut to an angle, and a valley might be swept, with specially cut stones forming a gentle curve instead of a sharp lead-lined trench.

Our Cotswold stone roofing page goes further into methods and sourcing.

Weight matters too. The booklet gives a figure of roughly one tonne across ten square metres of stone roof, so the timbers get inspected before any work begins, and we think hard before switching to a different weight of covering.

Most small roof repairs in Northleach need no more than a sound plan and suitable materials. The exceptions are worth knowing before you book anything, because stone slate is exactly the kind of detail a council cares about.

Q3.1How does Northleach's conservation area affect roof work?

The Northleach conservation area was designated on 11 January 1977, and a question about your own property is best put to the council's planning officers. A repair in like stone seldom calls for an application; swapping the covering or altering what the street sees might. A policy from an earlier Cotswold District Local Plan, quoted in the booklet, goes further for listed buildings: it says removing natural roofing from a listed slope and replacing it with modern material will not be permitted where that would significantly harm its interest. Our lead roofing page covers the metalwork often found alongside.

Q3.2What about the National Landscape?

The Cotswolds have been called a National Landscape since 22 November 2023, though the legal designation is still AONB. The landscape body advises on planning; the council decides. The status does not by itself turn a like-for-like re-roof into a planning matter.

Q3.3When does Building Regulations approval apply?

For re-covering, a building control application is usually unnecessary if the work touches under 25 per cent of the total building envelope and under 50 per cent of the roof. Pass either limit and one is required. A new covering at least 15 per cent heavier needs approval too, which matters if a reconstructed product replaces something lighter. Cotswold District Council runs its own building control team, and where the job needs one we look after the Building Regulations notification.

The parish church is exempt from the listed building system while it is in use for worship, so its roof work goes through a faculty instead of the council.