A roof replacement in Cromer is a significant piece of work, and understanding each stage of the process helps you know what a good job should look like from start to finish.
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Most homeowners do not have a roof replaced more than once or twice in their lives. Because it is unfamiliar work done mostly out of sight, it can feel hard to judge whether it is being done properly. Knowing what should happen at each stage, and why, puts you in a much better position to ask the right questions and spot if something is being skipped.
Aylsham Roofers carries out full roof replacements across Cromer and the wider Norfolk area, including Aylsham, North Walsham, and other nearby towns and villages. We work on pitched roofs, flat roof sections, and all the associated work - leadwork, chimneys, roofline - that comes with a full replacement.
A proper inspection is not a five-minute look from the pavement. A roofer should get up onto the roof or into the loft, or both, to assess what is actually happening.
From above, the inspection should cover the condition of the tile or slate covering, the state of the mortar at ridges and verges, the condition of any lead flashings at chimneys and valleys, whether tiles are lifting or slipping, and whether the roof surface is level or shows signs of sagging. Sagging almost always points to a structural problem with the rafters or the supporting timbers beneath, and this needs to be identified before any decision is made about the covering.
From inside the loft, the inspector can see the underside of the felt, check for daylight coming through gaps, assess the condition of the rafter timbers, and look for signs of moisture, staining or active leaks. A loft check takes ten minutes and gives information that is not visible from outside.
At the end of the inspection, the roofer should be able to tell you whether repair or replacement is the right course of action, and why. If the answer is replacement, they should explain what that involves for your specific property before you commit to anything.
A quote for a roof replacement should spell out what is included. The key items are: scaffolding, stripping and disposal of the existing covering, new underlay, new batten, the specified tile or slate, ridge treatment (wet mortar or dry-fix), verge and hip details, any leadwork to be renewed, and any structural timber repairs identified during inspection.
If structural timber repairs are needed, these can be priced upfront if the damage is visible, or the roofer may flag that once the roof is stripped, a further assessment will be needed before the final cost is confirmed. This is honest and normal - you cannot always see the full extent of rafter or batten damage until the covering comes off. What matters is that the roofer communicates this clearly in advance, so you are not surprised part way through the job.
Scaffolding is not optional on a domestic pitched roof. Safe working at height is a legal requirement, and any contractor who proposes to work without scaffold should not be on your shortlist. The cost of scaffolding for a standard semi-detached property in Norfolk is typically in the range of £600 to £1,200, depending on the property and the duration of hire.
Scaffold for a roof replacement is usually erected by a specialist scaffolding company and is a separate operation from the roofing work itself. It should be fully boarded and guarded before any roofing team goes up. The scaffold should also protect the garden and paths below from falling debris during the strip.
Access to the scaffold is via a ladder that is fixed and footed correctly. If you notice during the work that the scaffold is not boarded at the working level, or that it appears unstable, raise this with the roofer directly. It is a legitimate concern.
Once scaffold is in place, the existing covering is stripped. On a pitched roof, this means removing all tiles or slates, lifting the existing battens, and rolling up or pulling out the old underlay. This material is loaded into a skip or collected and taken away for disposal. The roof structure is then exposed and can be inspected properly.
At this stage, any problems with the rafter timber, the wall plates (the horizontal timbers that sit on the top of the walls), or the purlins (the horizontal timbers that run across the rafters mid-span) can be seen clearly. Soft or rotten sections should be cut out and replaced with new treated timber before the new covering goes on. This is not cutting corners in reverse - it is essential, because a new roof covering on failing structure will develop problems much sooner than it should.
Wind-driven rain over many years can push moisture under ridge tiles and into felt laps. When roofs are stripped, moisture damage in the upper rafters may be found, and this needs addressing.
If rafter or structural timber damage is found during the strip, the roofer should stop, show you or photograph the damage, and discuss the repair before proceeding. Replacing a rafter section or a length of purlin is straightforward work for an experienced team, but it adds time and cost that was not in the original quote if it was not visible during the initial inspection.
Honest communication at this stage is a mark of a good contractor. The alternative - covering over soft timbers with new felt and batten in the hope it holds - creates a problem that will surface in three to five years, by which point the roof will need stripping again.
Modern roofing underlay is a breathable membrane rather than the old bitumen-based black felt used on most pre-1990s homes. Breathable underlay allows water vapour from inside the house to pass through rather than trapping it, which reduces condensation in the roof void and extends the life of the batten and rafter above it.
The underlay is laid horizontally across the rafters, starting at the eaves and working upwards, with each course lapping over the one below. Laps should be a minimum of 150mm. The underlay is temporarily fastened before battens are laid over it - it is the battens and tiles that hold it permanently in place, not the temporary fixings.
A breathable membrane is now the standard for new roofing installations and replacements. If a contractor proposes to use the old black bitumen felt, ask why. It is not wrong in all circumstances, but it is worth understanding the reasoning.
New tanalised (pressure-treated) timber battens are fixed through the underlay and into the rafters below. The spacing of the battens is set by the gauge of the tile or slate being used - each manufacturer specifies the correct batten gauge for their product at a given roof pitch, and this should be followed precisely. Incorrect gauge leads to tiles sitting at the wrong angle, which affects both weathertightness and appearance.
Batten sizing matters too. The standard for most domestic applications is 25mm x 50mm for pitches up to around 45 degrees. Steeper pitches, longer spans, or heavier tiles may call for a larger section. Using undersized batten is a false economy that leads to early failure.
Tiles or slates are fixed to the battens, starting at the eaves and working upward to the ridge. Most interlocking concrete and clay tiles hook over the batten at the top and are also nailed or clipped. Slates are centre-nailed or head-nailed with two fixings each. At the edges - the verges - tiles are either bedded on mortar or finished with dry-fix verge systems. At the hips and valleys, the detailing depends on the tile type: valleys can be open-cut, laced, or covered with purpose-made valley tiles.
Fixing at the eaves course and the top course at the ridge requires particular care because these courses are most exposed to wind uplift. Manufacturers specify nailing or clipping requirements for different wind zones, and these should be followed for the eaves and ridge courses.
The ridge is the apex of the roof, covered by purpose-made ridge tiles. These can be bedded in mortar (the traditional method) or fixed using a dry-fix system, which uses purpose-made plastic or aluminium components with ridge tiles that clip or bolt into place. Dry-fix ridges do not crack or shrink as mortar can, and they do not need re-pointing. Both methods are in common use; either can be appropriate depending on the property and the specification.
Mortar at ridges should use a mix appropriate to the tile specification and should be finished neatly. Overly wet mortar can crack as it dries; overly dry mix does not bond properly. Pointing the ridge is one of those tasks that looks simple but shows the standard of the workmanship clearly.
Where the roof meets a chimney stack, a parapet wall, or a vertical face, lead flashing seals the junction. Lead is the traditional and most durable material for this purpose. A chimney stack typically needs a back gutter behind it, stepped flashings up each side, and a front apron below it. Each piece of lead is dressed into a mortar joint in the brickwork (called the chase) and secured with lead wedges before pointing over.
Poor leadwork is one of the most common causes of roof leaks on otherwise sound roofs. When a full replacement is being carried out, all existing leadwork should be inspected and renewed where necessary. Using old lead at the same time as a new covering is poor practice - the lead is usually the same age as the covering it was installed with, and if one has failed, the other is likely to follow.
Once the covering, ridge, verge, and leadwork are complete, the roofline should be checked. This is also the stage at which guttering is rehung correctly to the right fall. Broken or blocked gutters, or gutters that have dropped away from the fascia, should be addressed before the scaffold comes down, because scaffold access is what makes it practical.
A final inspection of the completed roof - checking that all tiles are correctly seated, that ridge and verge pointing is consistent, and that leadwork is properly dressed - should be done from the scaffold before it is struck. Any deficiencies spotted at this stage are straightforward to correct; the same issues discovered after the scaffold has gone are considerably more difficult and expensive to deal with.
The area around the property should be cleared of all materials, off-cuts, nail strips, and packaging before the scaffold is removed and before the job is signed off. A clean site is a basic standard, not a bonus.
A full replacement on a standard three-bedroom semi-detached house in the Cromer area typically costs between £5,500 and £12,000, depending on material choice, roof complexity, and structural condition. Natural slate costs more than concrete interlocking tiles. Properties with chimneys, dormers, or multiple valleys involve more labour and materials. EPDM flat roof sections typically cost £70 to £120 per square metre installed.
If your roof needs a proper inspection, or you want to understand whether repair or replacement is the right call, get in touch with Aylsham Roofers. We will carry out a thorough assessment and give you straightforward advice before any work is agreed. Call us to arrange a roof survey for your Cromer home.
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