When your roof in Cottenham has reached the end of its life, a full replacement done properly gives you a watertight home and years of trouble-free cover.
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Most roofs give clear signals before they fail completely. Persistent leaks that come back after repairs, widespread slipped or cracked tiles, sagging felt visible from the loft, or daylight showing through the roof void are all signs that patching is no longer cost-effective. A full replacement strips everything back to the rafters and starts again with new materials, so you are not chasing the same problems every winter.
A common question is whether a repair might do the job for another few years. Sometimes it will. But if the tile battens are rotten, the felt has split in multiple places, or the ridge and hip mortar has failed across the whole roof, repair costs quickly add up to a figure that makes a replacement the more sensible choice. Ask any roofer you speak to to give you an honest comparison of both options before you commit.
A replacement is not simply laying new tiles over the old ones. The work begins by stripping all existing tiles, slate or felt down to the bare timber structure. Each rafter, purlin, ridge board and hip rafter is checked for rot, insect damage or movement. Any suspect timber is cut out and replaced before anything else goes on. Skipping this step is a false economy that causes problems within a few years.
New breathable roofing membrane is then laid across the rafters. Unlike the old bitumen felt used on most pre-1980s roofs, modern breathable membrane allows moisture vapour to escape from the loft without letting water in. This reduces condensation in the roof space and extends the life of the timbers beneath. New tanalised timber battens are fixed over the membrane to give the tiles or slates a solid, even fixing surface.
Tiles or slates are then laid from the eaves upward, with every course aligned and fixed to manufacturer specification. Ridge tiles and hip tiles are traditionally bedded in mortar or, on newer work, secured with a dry-ridge and dry-hip system that does not rely on mortar and is less likely to loosen over time. Valley details, around chimneys and at abutments with walls are finished with lead flashing, which is cut and dressed to give a durable, neat seal.
At the eaves, the fascia boards, soffit boards and guttering are inspected. If they are rotten or badly fitted, this is the right time to replace them, because the scaffold is already in place and the eaves are exposed. The same applies to any roof windows: if the frames are tired, replacing them during a full re-roof is far more economical than returning later.
Material choice affects both the appearance and the long-term performance of your roof. The main options for pitched roofs in this part of Cambridgeshire are:
For flat sections of roof, the two most practical systems are torch-on felt (a multi-layer bitumen system heat-welded at the seams) and EPDM rubber membrane. EPDM is a single-ply rubber sheet that bonds to the deck and has no seams to fail. Both are sound options; the right choice depends on the size of the area and what is already there.
Typical roof replacement costs in and around Cottenham currently run from around £5,000 for a small terraced or end-of-terrace property up to £15,000 or more for a large detached with a complex roof featuring hips, valleys and a chimney stack. These figures include scaffold, strip and disposal of old materials, new breathable felt, battens, tiles or slates, and lead flashings. They do not include fascias, soffits or gutters if those need replacing separately.
Scaffold is a significant part of the cost and cannot be avoided on a full replacement. On a two-storey property, scaffold hire typically accounts for £800 to £1,500 of the total. Any quote that leaves scaffold out or says it is included but seems very low deserves a closer look.
Get at least two or three written quotes that specify the same scope of work: the same materials by name, the same coverage area, and a clear note of what happens if rotten timber is found. A quote that does not mention what timber repairs will cost if needed is not a complete quote.
We carry out roof replacements across Cottenham and the surrounding area, including Histon, Impington, Girton, Waterbeach, Over, Milton and further afield into Cambridge itself. We also cover the surrounding villages, and reach out toward Ely when the work requires it. If you are not sure whether we cover your location, call us and we will confirm.
This is where many homeowners lose years of life from an otherwise sound new roof. A replacement is a significant investment, and a small amount of attention in the years after the work is done will protect that investment and prevent the kind of gradual deterioration that leads to the next costly job.
The good news is that the maintenance a pitched roof needs is neither expensive nor complicated. The most important thing is to have it looked at periodically, ideally every two or three years, rather than waiting for a visible problem inside the house. By the time water is appearing on a ceiling, the leak has usually been running for some time and the damage is already done.
In the first year after a new roof is fitted, it is worth checking the following from ground level or from a loft inspection:
Blocked gutters are one of the most preventable causes of roof and wall damage. Leaves, moss, and debris accumulate in gutters through autumn. When a gutter fills with standing water, it overflows into the fascia board, down the wall, and sometimes back under the eaves into the roof structure. Wooden fascia boards rot from the top down, and once the rot reaches the rafter feet, you are looking at a structural repair rather than just a fascia replacement.
Clearing gutters once a year, in late autumn after the leaves have fallen, takes very little time and costs very little if you do it yourself from a ladder or ask a local window cleaner to include it. If you have a large roof with a tree canopy overhead, twice a year is better. Keep the downpipe outlets clear and check that the downpipes drain away freely at the bottom. A blocked underground drain at the foot of a downpipe can back up silently for months before anyone notices.
A new roof will begin to accumulate moss within a few years, particularly on north-facing slopes that dry slowly after rain. A thin layer of moss on otherwise sound tiles is not immediately dangerous. The problem comes when moss builds up thickly enough to hold moisture against the tile surface, or when it begins to block the gaps between tiles at the eaves, preventing drainage.
Biocide treatments applied by spray can kill moss and allow it to weather off over the following months. This is a gentler approach than pressure washing, which can damage the surface of concrete tiles and force water under slates if not done carefully. Avoid any treatment that involves sealing the entire tile surface with a coating: these products prevent the tile from breathing and can cause more problems than they solve.
Lichen, the flat, crusty growth that comes in grey or orange patches, is harder to shift than moss and takes longer to respond to biocide. It does not cause the same drainage problems as thick moss, but it can gradually etch into the surface of softer tiles over many years. Treatment is worth doing if it is spreading, but there is no urgency in treating a small patch on an otherwise sound roof.
Lead flashings at the chimney stack, against parapet walls, and in the valleys between two roof slopes are the most common points where water finds a way in. Lead is a durable material that lasts many decades when properly dressed, but it is not completely maintenance-free. It expands and contracts slightly with temperature changes, and over many years this can cause the edges to lift or the mortar that holds it into a wall joint to crack and fall out.
Every two or three years, it is worth looking at the lead flashing from ground level with binoculars, or asking a roofer to take a closer look during a routine inspection. Signs to look for are lifted edges, visible gaps between the flashing and the chimney face, and mortar pointing that has crumbled or fallen away. Catching this early means a small repointing job or a length of lead re-dressed. Left until water is tracking down the inside of a chimney breast, the repair becomes more involved.
You do not need a visible leak to justify calling a roofer. A periodic inspection is good practice on any property, and it is particularly worthwhile after a severe storm, after a very hard winter, or if you notice any of the following:
An inspection from scaffold or a ladder takes a roofer a short time and can confirm that everything is sound, or identify a small repair before it becomes a large one. Ask specifically for a written note of what was checked and what, if anything, was found. That record is useful if you come to sell the property and a buyer's surveyor raises a question about the roof.
The fascia board runs along the eaves and holds the bottom edge of the roof and the gutter bracket. The soffit is the horizontal board underneath it, closing off the gap between the wall and the fascia. Together they protect the rafter feet from rain and provide ventilation to the roof space. On many properties these are timber and are original to the house. After twenty or thirty years, timber fascias can begin to rot, particularly at the joints and where the gutter bracket fixings have allowed water to sit.
UPVC fascias and soffits are the most common replacement material. They do not rot, do not need painting and last for many years. If your timber fascias are showing signs of rot at the time of a roof replacement, this is the most sensible point to change them, since the scaffold is already up. Returning to do fascias separately means re-erecting scaffold specifically for that job, which adds cost.
Guttering is straightforward to replace and is often done at the same time as fascias. The main choice is between half-round and ogee profiles in UPVC, and cast-iron or aluminium for a period property where appearance matters. Make sure any new guttering is fitted with a slight fall toward the downpipe, not level, so that water drains rather than sitting.
When you contact us, we will arrange to visit the property and inspect the roof before giving you a written quote. We will tell you honestly whether a replacement is necessary or whether a repair would serve the roof well for a further period. If a replacement is the right option, the quote will specify the materials, the scope of work including timber checks, and what will happen if additional repairs are needed once the old roof is stripped.
Before you decide, ask a roofer to survey your roof in Cottenham or any of the nearby villages, so that you have a clear picture of what it actually needs.
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