The short answer
Patience and a light touch, as a general rule. Old frames have settled over the centuries, joins between building phases leak first, and soft masonry dislikes hard repairs. We start by finding where water actually enters, then fix that point with materials that match the building, instead of re-covering a whole slope.
Timber framing, thatch, Cotswold stone and brick nogging are all part of Standlake's building record. A roof on that kind of house is an assembly of repairs from different centuries, and a good survey reads that history before prices are discussed.
Q1.1Why do the joins between old and new leak first?
Where a stone addition meets an older frame, or a modern porch meets an old wall, the two parts move at different rates. Flashing, the lead strip sealing the junction, has to allow for that movement. Rigid fillets of sealant or cement crack within a few winters, whereas properly dressed lead with a stepped detail copes much better. Most leaks we are called to trace back to one of these junctions.
Q1.2Should I replace the whole covering if a few tiles are loose?
Rarely. Loose or cracked tiles can be replaced individually, each chosen to match the neighbours for age and colour, and a day on a roof ladder is often enough. If the underlay has perished or battens are soft, opening a slope shows it, and every photograph we take goes straight into your report. Our roof repairs page explains how we judge between patching and re-covering.
One more habit is worth mentioning. Before any tile comes off a timber-framed building we look at what the roof bears on, because a frame that has racked over centuries can make a neat repair misfit the next course along. The extra half hour spent checking the line saves a return visit.
Q1.3What about the stone-covered buildings?
Stone coverings follow their own rules: diminishing courses, careful pegging and very heavy loads on the structure. Our Cotswold stone roofing page explains how they are laid and why matching matters. On a house that mixes stone with brick or timber, the stone usually sets the standard, and the neighbouring materials are repaired to suit it.
Throughout, the goal is a lasting cure for the fault using as little work as it needs, reported with photographs from your own roof.