Sawston is a large village south of Cambridge with a varied housing stock that reflects its long history as a working community - there are older properties in the village core, post-war semis, and newer private estates on the edges. The range of property types means roofing needs here are genuinely mixed, with older roofs often in clay plain tile and many post-war homes in concrete tile. Cambridge Roofers works across Sawston and the villages nearby, and we understand the different demands each property era makes on a roofer. Whether you need a repair on an older cottage or a flat roof replaced on a modern extension, we can help.
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Sawston lies a short distance south of Cambridge and has long had its own industrial and commercial character, with a paper mill historically at its north-west corner. The village grew substantially after the Second World War.
The variety of housing in Sawston means there is no single roofing profile for the village. Older properties were often built with clay plain tiles on relatively steep pitches, and many still have their original tiles. These properties need careful handling: matching replacement tiles for clay plain tile roofs can be sourced but takes more effort than replacing a concrete interlocking tile. Getting the match wrong is visually obvious and, on a conservation or listed property, can create planning complications.
Post-war properties often have concrete interlocking tiles. These tiles are serviceable but the mortar bedding on ridges and hips has a limited lifespan, and on many of these properties it is now well past its best. Slipped, cracked or loose ridge tiles are one of the most common roofing issues on this type of housing stock.
On older clay tile roofs, the most frequent issue is not the tiles themselves but the mortar bedding on the ridge and the condition of the felt underlay beneath the tiles. Original underlay on a pre-1970s roof is typically a bituminous felt that has long since dried out and become brittle. When it fails, wind-driven rain that gets beneath a tile goes straight into the loft rather than being deflected down onto the ceiling. A full re-roof strips everything back to the bare rafters, fits modern breathable felt underlay, new treated battens and re-tiles - this is the correct approach when the underlay has genuinely failed.
On the post-war semis, the ridge mortar is often the first thing to go. A common problem is that mortar cracks away from the ridge tile underneath, creating a gap that allows water in at the very apex of the roof. This is particularly visible after a period of frost, when freeze-thaw cycling widens existing cracks rapidly. Repointing or re-bedding ridges, or replacing mortar bedding with a dry-fix mechanical system, resolves this without a full re-roof in most cases.
Many properties have flat-roofed extensions, garages and outbuildings. Older felt flat roofs are frequently at or past end of life. The signs are consistent: blistering on the surface, visible cracks at upstands and edges, ponding water after rain, and staining or damp patches on the ceiling or internal walls below.
When a felt flat roof fails, the most practical replacement is an EPDM rubber membrane system. EPDM is a single-ply rubber sheet bonded to the roof deck - it handles thermal movement without cracking, forms a seamless waterproof layer and has a manufacturer product lifespan typically quoted at 20-25 years or more. Flat roof replacement in the UK using EPDM typically costs in the region of £90 to £150 per square metre, depending on the size, the condition of the deck beneath, and the number of upstands and outlets. A straightforward garage or extension flat roof is normally a one to two-day job.
If the deck boards beneath an old felt roof have softened or delaminated due to long-term water ingress, they will need replacing before the new membrane goes down. This adds cost but is not optional - a new membrane on a failed deck will fail prematurely regardless of its quality.
Older properties often have timber soffits and fascias. Timber rots from the back, where moisture accumulates behind the board and cannot dry out. By the time paint is peeling or wood feels soft when pressed, the rot has typically spread further than it looks from the outside. Replacement with uPVC boards eliminates the rot problem: uPVC does not absorb moisture, needs no painting and provides a stable fixing point for new guttering.
Soffit and fascia replacement on a three-bedroom semi typically costs £900 to £1,500, depending on the length of run, access requirements and the condition of the rafter feet behind the existing boards. If rafter feet are rotten, they need cutting back and splicing before the new boards go on - this is a job that needs to be assessed on site rather than quoted blind.
Guttering is worth considering at the same time. Blocked or leaking gutters are a leading cause of water damage to fascias and external walls. On Sawston's older properties, cast iron guttering is sometimes still in place - it can last well but joints need resealing periodically and sections can crack. uPVC replacement is lighter and easier to join, and the full fascia, soffit and guttering job is most efficiently done in one visit.
Older properties often have chimney stacks, some of which are no longer in active use. Redundant stacks still require maintenance: without ventilation and weatherproofing, rain enters through the pot, saturates the internal brickwork and causes damp on the chimney breast inside. Fitting a chimney cap or cowl with a ventilated base keeps rain out while preventing a sealed stack from developing condensation problems inside.
Where a stack is genuinely redundant and causing problems, having it taken down to below roof level and the roof surface made good is a permanent solution. On a standard two-storey house, this typically costs £800 to £1,500 depending on stack size and scaffold requirements. Lead soakers and replacement tiles are fitted where the stack once projected, leaving a weatherproof and maintenance-free finish.
A full re-roof on a three-bedroom semi-detached house in the Sawston area typically costs in the region of £5,000 to £9,000 for concrete interlocking tiles, rising to £8,000-£13,000 or more for clay plain tiles on an older property where sourcing matching materials and working carefully around original features adds time and cost. Scaffolding is a legal requirement for safe working on a two-storey roof and typically adds £800 to £1,500 to the overall price.
Before committing to a full replacement, it is worth establishing whether a repair is genuinely the right call. A roof that looks tired from the street may only need ridge repointing, a few replacement tiles and re-dressed lead flashings - work that might cost £400 to £900 and extend the roof's life by a decade or more. A proper close inspection - not just a look from the ground - is the only way to know for certain.
We cover Sawston and the surrounding villages as part of our working area south of Cambridge. If you have a leak, a flat roof that needs attention, a chimney problem or you simply want to know the state of your roof before you buy or sell a property, call us to arrange a survey. We will inspect the roof properly, tell you what we find and give you a clear price for whatever work is needed.
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Call any time. Calls are answered day and night and passed straight to our roofers.
