Ely Roofers carries out full roof replacements in Waterbeach, helping homeowners work out whether a replacement is genuinely needed or whether targeted repairs will do the job properly.
It is the most important decision in roofing, and it is not always straightforward. Repair the wrong roof and you are spending money every couple of years with no end in sight. Replace a roof that still has life in it and you have spent five times what the job needed. Getting this right depends on an honest assessment of the roof's overall condition, not just the obvious problem in front of you.
This page is about helping you understand when each option makes sense, what the signs are, and what questions to put to a roofer before you agree to either course of action.
A roof replacement is not just swapping tiles. The full job involves stripping the existing covering - tiles, slates or flat roof membrane - right back to the deck or rafters. The timbers are inspected and any that are soft, cracked or sagging are replaced. New breathable underlay goes on first, then new battens, then the new covering. Flashings at chimneys, walls and valleys are remade in lead or a lead-compatible alternative. Ridges and hips are finished with a dry-fix system or mortar bed, depending on what suits the roof.
On a standard semi-detached house in this part of Cambridgeshire, a full pitched roof replacement typically costs somewhere between £5,000 and £10,000. A larger detached house with hips, valleys and a chimney stack will be at the higher end or beyond. EPDM rubber flat roofs are generally priced by the square metre, often from around £70 to £120 installed.
A repair makes sense when the problem is isolated and the rest of the roof is structurally sound. If you have a handful of slipped or cracked slates, a failed flashing around a chimney, or a small section of ridge that has lost its mortar, a targeted repair will resolve those issues without touching the rest of the roof.
Age alone does not make a roof unrepairable. A 40-year-old slate roof in reasonable structural condition can often be repaired and maintained for many more years. Natural slate in particular is long-lived, and a good roofer can source matching slates to blend new with old.
Repair is usually the right first step when:
There is a point where a roof has been repaired so many times that there is nothing left to anchor new work to. Crumbling mortar, brittle underlay that disintegrates when touched, tiles that are too fragile to walk on without breaking - at this stage, a repair is not really a repair. You are patching over a failing structure.
A replacement is the more sensible choice when:
A common problem is that sand-and-felt underlay from the 1970s and 1980s degrades over time, becoming brittle and porous. Once that happens, individual tile repairs do not stop water from getting into the roof space. The only way to address it properly is to strip and re-cover.
When a roof is genuinely at the end of its life, delaying a replacement is rarely a saving. Water that enters through a failing underlay works its way into the timber structure. Wet rafters are weaker than dry ones, and sustained damp can cause rot that spreads to wall plates and ceiling joists. What would have been a £7,000 roof replacement can become a £7,000 replacement plus several thousand more in structural timber work.
Damp also encourages mould growth inside the roof space, which can affect the rooms below. A loft conversion or extension becomes more complicated and expensive if the timbers are compromised.
From the ground, using binoculars if you have them, look at the overall state of the surface. Isolated missing or cracked tiles suggest a repair. Widespread breakage, large areas of bare timber visible between tiles, or sections of roof that appear to be moving and shifting suggest something more serious is going on.
Inside the loft space is often more informative. On a dry day, daylight visible through the underlay or between rafters is a clear sign of failure. On a wet day, drips or wet patches that appear away from a single obvious entry point suggest the underlay has broken down across a wide area rather than at one specific joint or flashing.
A roofer should get on the roof rather than quote from the ground. Walking the roof allows them to test the underlay, check the condition of the battens and inspect flashings and ridge work at close quarters. Any assessment made purely from a ladder or a drone photograph has its limits.
Replacing a roof with the same or equivalent materials generally falls within permitted development and does not need planning permission. If your home is in a conservation area or is listed, you should check with the local planning authority before work starts, as restrictions may apply to materials or design. Your roofer should flag this at the survey stage if they know your property's status - but it is worth checking yourself if you are in any doubt.
Whether you are being quoted for a repair or a replacement, the figures should come in writing and should detail exactly what is included. For a replacement, confirm that the quote covers scaffold hire, disposal of the old materials, any timber repairs found during the strip, new underlay and battens, flashings, ridge and hip finishing, and the new covering itself. An unexpectedly low quote usually means one or more of those elements is missing.
We work in Waterbeach and across the surrounding villages, including Ely, Milton, Histon, Soham, Witchford, Haddenham, Over, Stuntney, Prickwillow, Downham and Queen Adelaide. If you are not sure whether your location is covered, call us and we will let you know.
If you are unsure whether your roof needs repairing or replacing, call Ely Roofers to arrange a roof survey in Waterbeach. We will give you an honest assessment and a written quote for whichever option makes sense for your property - not just the more expensive one.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
