When your roof in Milton has reached the end of its life, a full replacement carried out properly gives you a dry, sound structure you won't need to worry about again for decades.
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Most roofs don't fail overnight. The signs build up gradually: slipped or cracked slates, mortar crumbling away from ridges and hips, damp patches appearing on bedroom ceilings after heavy rain, or felt that has hardened and split after years of frost and heat. At some point, patching becomes more expensive than replacing, and a full roof replacement becomes the sensible choice.
A common situation is a roof where individual repairs have been carried out over many years, but the underlying felt is now beyond help and the battens are beginning to rot in places. Continuing to patch costs money each season without addressing the root cause. A replacement fixes everything in one job and leaves you with a roof built to a consistent standard throughout.
If you're not sure which side of that line you're on, a proper look at the timbers from inside the loft is often more revealing than looking at the tiles from the street. Dark staining on the rafters, wet or crumbly felt, and daylight visible through the structure are all signs that a replacement should be seriously considered.
Understanding exactly what happens during a roof replacement helps you plan properly and know what to expect each day. Here is how a well-run job unfolds from first inspection to final tidy-up.
A replacement starts with a thorough look at the whole roof, not just the visible surface. That means checking the loft space for rot, insect damage or deflection in the rafters, inspecting the ridge, hips and valleys, examining flashings around chimney stacks, skylights and party walls, and assessing the condition of the fascias, soffits and guttering. If the fascias are soft or rotten, they need to come out before the new roof goes on, because the new felt and first course of tiles or slates need a sound edge to sit against.
This survey stage is where you establish the true scope of the job. Any roofer who gives you a price without spending time on this stage is guessing. The survey should result in a clear, itemised breakdown of what is being replaced and with what materials.
Safe scaffolding is not optional on a full replacement. It protects anyone working at height, and it protects your property from materials dropped or shifted during the strip-off. Scaffold boards laid at gutter level also make it much easier to handle heavy materials safely without damaging your guttering or the wall below. Expect the scaffold to go up a day or two before the main work begins.
Before stripping starts, the garden, pathways and any glass below the roof line (conservatory roofs, skylights at a lower level) should be protected with boards or heavy sheeting. A skip or bulk bags are positioned close to the property so waste can be removed quickly without it sitting on the drive for days.
The existing tiles or slates come off first, sorted as they go. If your existing Welsh slate is genuinely sound, some of it may be worth salvaging and reusing, which can reduce material costs. Modern concrete or clay plain tiles from a stripped roof are rarely worth keeping because their camber and colour won't match new stock. All old nails, any corroded clips and the existing felt and battens are stripped back to bare timber.
This is the stage that reveals the true condition of the structure. Rotten sections of rafter or wall plate are cut out and replaced with treated timber at the same cross-section. Sagging purlins are checked for bearing. Damaged truss members are assessed. Any structural timber work found at this stage should be agreed with you and costed before it goes ahead.
Once the timbers are sound and treated against future rot and insect attack, breathable roofing underlay is fixed across the rafters, lapped correctly at every horizontal joint and turned into the gutters at the eaves. Breathable felt (sometimes called membrane or sarking felt) replaced the old black felt decades ago because it allows moisture vapour from the house to escape rather than trapping it. If a roofer proposes using non-breathable felt on a new build or full replacement today, that is worth querying.
Treated sawn timber battens are then nailed through the felt into each rafter at the correct gauge for the chosen tile or slate. The gauge - the exposed face of each batten - is calculated from the roof pitch, the tile manufacturer's specification and the length of the tile or slate being used. Getting this wrong means tiles that don't sit flat, water that tracks back under the laps, and a roof that lets in driving rain.
Tiles are laid from the eaves upward, with each course lapped over the one below by the specified amount. Eaves tiles are often cut or a purpose-made eaves course is used to give the correct overhang into the gutter. Every tile is nailed or clipped to the batten beneath it according to the fixing specification for the pitch and exposure of the roof.
Verges (the edges of the roof at the gable ends) are finished either with a mortar bed and pointing, or increasingly with a dry verge system using interlocking plastic or aluminium trims that clip over the edge tile without any mortar. Dry verge systems are worth considering because mortar verges crack and detach over time, whereas a well-fitted dry system stays tight.
Valleys - the internal angles where two roof slopes meet - are formed with a purpose-made valley trough or cut tiles laid to a close-cut valley depending on the tile profile and the customer's preference. Lead is still the benchmark material for valley liners and flashings because it is malleable, long-lasting and can be dressed neatly into any profile.
The ridge is bedded in a mortar mix appropriate for roofing use and pointed off neatly, or a dry-fix ridge system is used with purpose-made ridge tiles clipped and secured mechanically. Dry-fix ridges are now the standard recommendation on new work because mortar ridges, however well laid, will crack as the roof structure moves with seasonal temperature changes.
Hip tiles follow the same logic: either a traditional mortar-bedded hip with a hip iron at the foot, or a dry-fix system. Flashings around chimneys are formed in code 4 lead, stepped into the brickwork joints and dressed down over the tiles. A back gutter behind the chimney stack is lead-lined and shaped to carry water away to each side rather than letting it pond behind the stack. Flashings around skylights, roof windows and party walls are finished in the same way.
If the fascias and soffits are being renewed as part of the job, they go on once the tiles are laid and the roof edge is established. uPVC fascia and soffit boards are the most common choice because they don't rot, don't need painting and can be fitted with ventilation inserts to allow air into the roof void. Timber fascias are still used where a property specifically calls for them, but they need to be primed, painted and maintained.
New guttering is fitted to the fascias before the scaffold comes down. Half-round and square-section gutters in uPVC are the standard domestic choice. Cast-iron guttering is available for period properties and gives a traditional appearance, though it needs painting and is heavier to handle.
Before the scaffold comes down, the finished roof is walked and inspected: every hip tile checked for movement, every ridge tile bedded consistently, all verge edges sitting tight, valley troughs clear of debris, and all flashings lapped and pointed neatly. Any mortar droppings on tiles below are cleaned off. The gutters are checked to confirm they fall correctly to the downpipes.
Once the scaffold is struck, all waste is removed from site: broken tiles, old felt and batten, packaging and any other debris. The drive, garden and pathways are left clean. A job finished properly shouldn't leave any trace of the work beyond the new roof above.
The choice of tile or slate affects the look of your roof, its weight loading on the structure and its long-term performance. For most houses in and around Milton, the main options are as follows.
All of these prices are approximate current UK ranges for a straightforward replacement on a typical semi-detached or detached house. Steeply pitched roofs, multiple hips and valleys, chimney stacks and large areas of flashing work will all add to the cost. Always get the price broken down so you can see what you are paying for.
Many houses have flat or low-pitch sections over bay windows, extensions, porches or garages. These are almost always dealt with separately from the main pitched roof and use different materials.
Traditional built-up felt on a flat roof has a limited lifespan, typically fifteen to twenty years under normal conditions, and the most common failure is the felt splitting at seams or lifting at edges, letting water track back under the covering. When a flat section needs replacing, the two main modern options are a torch-on polyester-reinforced felt system laid in two or three layers, or an EPDM rubber membrane laid in a single sheet. EPDM is increasingly popular for domestic flat roofs because the single-sheet application eliminates seams across the main field of the roof, which is where felt most often fails.
Falls (the slight slope built into a flat roof to shed water) should be a minimum of 1:80 to comply with current guidance, but 1:40 or better is preferable in practice. If a flat roof ponds water rather than draining it cleanly, the problem will come back whatever material is used on top, so any replacement should also check and if necessary correct the falls.
A full replacement is the right moment to deal properly with chimney stacks. Lead flashings are stripped and replaced with new code 4 lead, stepped and wedged into the brick joints. The back gutter, apron flashing, step flashings and soakers around each side are all renewed. If the chimney stack itself has deteriorated brickwork, loose pointing or a defective or redundant pot, this is the time to address it while access is available and the cost of scaffolding is already absorbed in the main job.
Redundant chimney stacks - those serving fireplaces that have been blocked up and are no longer in use - are sometimes taken down to roof level as part of a replacement. This eliminates a future maintenance point and, on some roof shapes, simplifies the new flashing detail. Whether to take a stack down or keep it is a matter of preference and the character of the property; some homeowners prefer to retain them for appearance, others are glad to remove a maintenance liability.
If a roof window or skylight is in place when the roof is stripped, it should be inspected before being reset into the new covering. Flashings around roof windows are a common source of leaks even on relatively new roofs, particularly where the original fitting was rushed or the flashing kit was not correctly installed. Most major roof window manufacturers supply purpose-made flashing kits for their products; these should be used rather than improvised lead work. If the window itself is old and its seals or glazing unit are failing, a replacement is more practical than resetting it and discovering problems later.
Cambridge Roofers carry out roof replacements across Milton and the surrounding villages and towns. If you are not sure whether we cover your area, get in touch and we can confirm.
Before signing anything, ask the roofer to confirm in writing: what tile or slate they are specifying and the manufacturer's name, whether they are using breathable underlay, whether the battens are pressure-treated, how valleys and ridges will be finished (mortar or dry-fix), what happens if structural timber damage is found once the roof is stripped, and how the site will be protected and waste disposed of.
A roofer who is confident in the quality of their work will have clear answers to all of these questions. Vague answers or pressure to decide quickly without a written specification are both reasons to look elsewhere.
If your roof in Milton is showing signs of age or you have been told it needs replacing, call Cambridge Roofers to arrange a proper survey of the structure. We will give you a clear, itemised quote covering materials, labour and disposal so you know exactly what the job involves before any work starts.
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Call any time. Calls are answered day and night and passed straight to our roofers.
