When your roof starts showing the early signs of trouble, getting a proper repair done quickly is the difference between a modest fix and a costly rebuild.
A roof repair is not simply replacing a broken tile or slapping fresh mortar on a ridge. A proper repair means identifying every weak point, not just the one that has already caused a problem. At Dereham Roofers we assess the full roof before we touch anything, because damage in one area almost always points to stress or deterioration somewhere nearby.
We work with the materials already on your roof - whether that is concrete interlocking tiles, plain clay tiles, natural slate or man-made slate - and match replacements carefully so the finished repair does not stand out and, more importantly, performs the same way as the rest of the covering.
North Tuddenham homeowners contact us with the same handful of problems: slipped or cracked tiles, flashings that have pulled away from chimney stacks or dormer walls, ridge mortar that has crumbled and become loose, and valleys that are letting water in. Each of those issues has a cause, and fixing only the symptom means the problem comes back.
This is the section most homeowners wish they had read earlier. Spotting roof problems before they become serious saves significant money and avoids the kind of internal damage - wet plasterwork, ruined loft insulation, stained ceilings - that makes a straightforward repair job much more complicated.
A brown or yellow stain on an upstairs ceiling, or damp plasterwork in a loft room, is one of the most reliable signs that water is getting through the roof covering or a flashing. The stain does not always appear directly below the entry point - water can travel along rafters or battens before it drips. If the stain grows after rainfall, the problem is active and needs attention now, not next month.
Ceiling stains near a chimney breast almost always point to a failed flashing rather than a broken tile. Lead or mortar flashings at the junction between a chimney stack and the roof slope are a common failure point, particularly on older properties where the original lead has been repaired with mortar or mastic rather than properly re-dressed.
A tile that has slipped out of position is immediately visible from ground level if you know what to look for. Stand back and look at the roof plane - any tile sitting at a different angle to its neighbours, or any dark gap where daylight is getting through, is a problem. Binoculars help if the roof is steep or high.
Tiles slip for a few different reasons. Nibs - the small lugs on the back of a tile that hook over the batten - can break off, particularly on older concrete tiles that have become brittle. Battens rot over time, especially where water has been getting in from another source, and a rotted batten will let multiple tiles slip at once. In some cases the tiles themselves have reached the end of their serviceable life and the surface is delaminating or the body has become porous.
A single cracked tile is usually a straightforward replacement job. Multiple cracked tiles across the same area, however, suggest something has hit the roof (falling branch, aerial work, someone walking on it incorrectly) or that the tiles are simply old and the freeze-thaw cycle over successive winters has opened up existing hairline fractures.
Ridge tiles sit at the apex of the roof and are traditionally bedded and pointed in mortar. That mortar is exposed to direct weathering from above and below, and over fifteen to twenty years it typically begins to crack, shrink away from the tile and eventually fall out in chunks. Once the mortar bond is gone, ridge tiles are held in place only by gravity and their own weight - a strong gust can shift or dislodge them.
Loose ridge tiles are a safety hazard as well as a weathering problem. A ridge tile falling from a height can cause serious damage to guttering, fascias, vehicles and people below. If you can see white or grey powder or crumbled mortar fragments in your gutters, or around the base of the roof, ridge mortar failure is likely.
The modern solution on many roofs is to re-bed ridges in a flexible mortar compound rather than standard sand-and-cement mix, which reduces future cracking. On some roofs a dry-fix ridge system - where mechanical clips rather than mortar hold the ridge tiles - is a better long-term option. We assess which approach suits your existing roof and tile profile.
Flashings are the strips of lead, aluminium or mortar that seal the junction between the roof covering and any vertical surface - chimney stacks, parapet walls, dormer cheeks, roof windows and soil vent pipes. They are, without exception, the most common source of roof leaks because they are asked to deal with movement, thermal expansion and contraction, and the channelling of water away from a joint that is inherently difficult to seal permanently.
Lead flashings are the most durable when fitted correctly. They can last forty years or more if they have been properly dressed and stepped into the mortar courses of a chimney rather than just surface-fixed with mastic. A common sign of flashing failure is a brown stain running down an internal chimney breast wall, or a patch of damp that appears only during heavy or wind-driven rain.
Mortar-only flashings - sometimes called cement fillets - are a cheaper original installation that rarely lasts more than ten to fifteen years before the mortar shrinks away and cracks. If your chimney has a mortar fillet rather than lead stepped flashing, a lasting repair will almost certainly involve removing the fillet and fitting proper lead.
A roof plane should be flat - or very close to it. If you look along a slope from the end of the property and the surface dips, waves or shows an uneven profile, the cause could be a rafter that has split or dropped, a section of sarking board or deck that has deteriorated, or battens that have rotted through. This kind of structural movement needs investigation before any tile or slate work takes place, because replacing the covering without addressing the structure underneath will not last.
On older roofs without a felt underlay, sarking boards can rot along the eaves where water has been running back. The first sign is often a sagging line just above the guttering rather than across the middle of the slope.
Heavy moss growth is not, by itself, proof that a roof needs replacing - but it does tell you something. Moss holds moisture against the tile or slate surface, which accelerates freeze-thaw damage and can force tiles upward slightly over time. A heavy moss covering can also block water flow across the roof, pushing it under overlaps and into the underlay or loft space.
Lichen - the grey-green or orange crusty growth - is harder to remove than moss and tends to indicate tiles that have been damp for extended periods. Gutters blocked with granules washed from a mineral-surface felt flat roof, or with crumbled mortar fragments, are both worth investigating further.
A reliable repair involves stripping back to the source of the problem rather than working over the top of it. Replacing a tile without checking the batten it sits on, for example, means the replacement tile may slip within a year if the batten is rotten. Pointing over cracked ridge mortar without removing the loose material first gives a finish that looks better but lasts no longer.
Before any repair work starts, you should expect a roofer to inspect the full roof covering, check the ridge and hip lines, look at all flashings, and where accessible inspect the underlay or felt from inside the loft. Any roofer who quotes a price on the basis of a single photograph from the ground without getting onto the roof is not in a position to give you an accurate quote.
Materials used in the repair should match what is already on the roof in type and, as far as possible, in colour and profile. A replacement tile that does not match the existing profile will not seat correctly against its neighbours and may let water in around the edges.
For small, straightforward repairs - replacing two or three slipped or broken tiles, re-pointing a section of ridge, or re-dressing a lead flashing - typical costs in this part of Norfolk run from around £150 to £400 depending on the extent of the work and the accessibility of the area affected. Most single-issue repairs on an average semi-detached property fall in this range.
More involved repairs - a full ridge re-bed and re-point, replacement of a chimney flashing with proper lead, or repair of a valley - typically run from £350 to £900. Where timber investigation finds rotted battens over a section of the roof that need replacing before new tiles can be laid, costs rise accordingly, usually starting from around £500 for a localised section.
These are typical ranges for the work itself; scaffold or access equipment is costed separately and depends entirely on the roof height, pitch and what is around the property. Any quote should separate out the access cost so you can see exactly what you are paying for.
We carry out roof repairs across North Tuddenham and the surrounding villages. Properties in this part of Norfolk vary considerably, and the roofing materials and problems vary accordingly. What does not change is the approach: assess the whole roof, identify the cause, repair it properly.
These are reasonable questions for any homeowner to ask, and a roofer who cannot give clear answers to them is worth approaching with caution.
If you have noticed any of the warning signs described on this page - damp patches, slipped tiles, crumbling ridge mortar, staining near a chimney - call Dereham Roofers to arrange a proper roof survey. We will get onto the roof, assess the full picture and give you an honest account of what needs doing and what it will cost.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
