When your roof in Cambridge has reached the point where repairs are no longer holding, Newmarket Roofers carries out complete roof replacements that give you a fresh, watertight start.
This is the question most homeowners sit on for longer than they should. A roof rarely fails overnight. It gives off warning signs for months, sometimes years, before it becomes an emergency. Knowing what to look for means you can plan the work properly rather than scramble for cover after a leak has already caused damage inside.
The most visible sign is missing or slipped tiles. A tile here and there can be replaced individually, but if tiles are slipping regularly, the nibs that hook them onto the battens have corroded or the battens themselves have rotted. At that point you are patching a structure that is failing beneath the surface.
Cracked or broken tiles are different again. Older concrete interlocking tiles become brittle over time and crack under frost. Natural slate can delaminate, splitting into layers along its grain. When you see a pattern of breakage rather than isolated damage, the covering as a whole is past its serviceable life.
Roofs fail for several reasons, and understanding the cause matters before you choose what to replace it with.
Felt degradation. Beneath every tiled or slated roof is a layer of roofing felt (also called the underlay or sarking felt). Early felt, fitted before the 1970s, was bitumen-based and has a lifespan of around 30 to 40 years. When it degrades it becomes brittle, tears at nail holes and eventually falls away in sections. You may notice dust or debris in your loft that looks like black tissue paper. That is degraded felt, and once it goes, a tile gap in a heavy downpour means water enters the roof space directly.
Batten decay. Tiling battens are thin strips of timber that the tiles hang from. They were often treated only lightly in older properties and can rot where felt has failed and allowed moisture to sit. Replacing battens is always part of a full re-roof and should never be skipped to save cost.
Ridge and hip mortar failure. The mortar bedding along ridge tiles and hip tiles cracks as it ages and as the roof moves through seasonal thermal cycles. Loose ridge tiles are a common cause of urgent call-outs. However, if the bedding across the whole roof is crumbling, a full re-roof with mechanically fixed dry-ridge systems is a sounder solution than re-bedding again.
Lead flashing failure. Where a roof meets a chimney stack, parapet wall or dormer, lead flashing seals the junction. Lead lasts a long time when correctly fitted, but poor original workmanship, insufficient lap or pinhole corrosion eventually lets water in. This alone does not necessarily mean a full replacement is needed, but it always needs attention as part of the wider re-roof scope.
Age. A concrete interlocking tile roof has a typical service life of 30 to 50 years. Natural Welsh slate, when bedded and pointed correctly, can last well beyond 80 years. Reconstituted slate sits somewhere between the two. If your roof is approaching or past these thresholds, even with no obvious damage above, an inspection in the loft is sensible. Discolouration of the rafters, damp patches on insulation or daylight showing through are all signs the roof has reached its limit.
Repair makes sense when the covering itself is largely sound, damage is localised, and the underlying structure is intact. A section of slipped tiles after a storm is a repair. A ridge that has come loose in one spot is a repair.
Replacement becomes the sensible answer when repairs are recurring and cumulative costs are mounting, when the felt and battens are compromised across the roof, when more than roughly a third of tiles are cracked or broken, or when the property is being sold and a surveyor flags the roof as past its useful life. Attempting to patch a structurally tired roof is often a false economy over a five to ten year horizon.
A complete re-roof starts with scaffolding. Safe access is not optional, and any quote that does not include scaffolding should raise questions about how the work will actually be done safely.
Once access is in place, the existing tiles or slates are stripped back to the rafters. Good practice is to start at the ridge and work down. Stripped tiles that are in good condition can sometimes be saved and relaid, which matters with reclaimed natural slate where matching replacements can be expensive. Your roofer should tell you clearly how many existing tiles are reusable before work starts.
The rafters are then inspected. Any rotten or damaged timber is replaced at this stage. Skipping this step and laying new felt over compromised timber is a cut that will cost more to put right later.
New breathable membrane (the modern equivalent of felt) is then laid over the rafters, overlapping correctly at every course. Breathable membrane allows moisture vapour from the house to escape while keeping rain out, which reduces the risk of condensation building up in the roof space.
New treated tiling battens are fixed over the membrane. Then tiling begins, working from eaves to ridge. Ridge tiles are fixed with a dry-ridge mechanical system rather than mortar bedding in modern re-roofs, which eliminates the cracking and re-pointing cycle.
Lead flashing to chimney stacks and any abutments is replaced or repaired as part of the scope. Gutters and fascias are inspected; if they need replacing this is the logical time to do it, since the scaffolding is already up.
Roof replacement costs vary significantly depending on the size of the roof, the pitch, the material chosen and the condition of the timber structure underneath. For a typical semi-detached property, total costs including scaffolding commonly fall in the range of £4,500 to £9,000. A larger detached property or a more complex roof with hips, valleys and multiple chimneys will sit at the higher end or beyond.
Natural slate costs more than concrete tile to supply but tends to have a longer service life and is often preferred where planning restrictions or aesthetics require it. Reconstituted slate is a middle option: longer lasting than concrete tile, lighter than natural slate, and available in a range of finishes. Ask to see samples and check whether the product carries a manufacturer's product guarantee, as these differ significantly between brands.
Scaffolding is erected before any roofing work begins and remains in place until completion. It is loaded onto the public pavement or your driveway depending on access. Where scaffolding extends over a pavement, local authority permissions may be required, so factor this into your planning if you are working to a deadline.
Scaffold boards and handrails protect the property from falling materials during the strip-off. A good crew will also use roof sheets or temporary covers to protect the open roof if work is stopped by rain overnight.
A roofer who can answer these questions clearly before work starts is one who has done the job enough times to know what they are quoting for.
We carry out roof replacements in Cambridge and across the wider area, including nearby towns and villages such as Shelford, Soham, Reach and Six Mile Bottom, as well as back towards our base in Newmarket and out to Dullingham, Kentford and Moulton. If you are unsure whether we cover your area, call and ask.
If your roof in Cambridge is showing signs of age or failure, the sensible first step is a proper inspection rather than a guess from the ground. Call us to arrange a roof survey and we will give you a straight assessment of whether repair or replacement is the right answer for your property.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
