If your Norwich home is showing signs that the roof is failing, understanding what those signs mean and why they happen is the first step to making the right decision.
Call any time. Calls are answered day and night and passed straight to our roofers.
Most homeowners don't think about their roof until something goes wrong. By the time water is coming through the ceiling, the damage is often well beyond what a patch repair can fix. Knowing the warning signs early - and understanding what is driving them - puts you in a stronger position when you talk to any roofer.
A new roof is a significant investment, and nobody should be pushed into one unnecessarily. At the same time, running repairs on a roof that is genuinely past its serviceable life costs more in the long run than replacing it cleanly. The sections below explain what to look for and what is usually behind it.
Slipped, cracked or missing tiles are the most obvious sign. A tile or two coming loose after a storm is not unusual, but if slippage is happening repeatedly, or if tiles are cracking without obvious impact damage, the nibs - the small hooks that hold each tile to the batten - are likely deteriorating with age. Once nibs start failing across a roof, individual replacements become a holding exercise.
Moss and lichen growth alone does not mean a roof needs replacing, but thick, established growth holds moisture against the tile surface and can accelerate freeze-thaw damage over winter. Frost gets into small cracks, expands, and breaks the tile from within. If you are seeing this on older tiles, it is worth having the whole roof assessed rather than just clearing the moss.
Look at the ridge and hip tiles. These are bedded in mortar, and that mortar has a finite life. Cracked or crumbling ridge mortar lets water in at the very top of the roof and can allow the ridge tiles themselves to shift. Repointing can extend the life of a roof, but if the underlying tiles and battens are also old, repointing alone is not always the right answer.
Check the flashing around chimneys, skylights and the joins between a pitched roof and any flat section or party wall. Lead flashing is long-lasting but does degrade, particularly at stepped sections where movement causes cracking over decades. Failed flashing is a common entry point for water that then tracks a considerable distance before appearing as a damp patch inside.
Go into the loft in daylight with the lights off. If you can see pinpricks or shafts of daylight through the roof covering, the tiles or felt underneath are compromised. Some light around eaves vents is normal, but light through the main roof surface is not.
Look at the timbers. Dark staining or soft spots on the rafters and purlins indicate water has been getting in, possibly for years. If the structural timbers are compromised, a new roof covering alone may not be sufficient - the timberwork will need assessment too. This is one reason why getting a proper inspection matters before committing to any scope of work.
Damp patches on ceilings, particularly after rain or frost, are an obvious indicator. What is less obvious is that the leak point is rarely directly above the damp patch - water travels along timbers and felt before dripping. A wet patch in a bedroom ceiling could be caused by failed flashing at a chimney several metres away.
Age is the most straightforward cause. Concrete tiles installed from the 1960s through to the 1980s are now reaching or past their design life. Clay tiles can last considerably longer, but the battens they sit on and the felt beneath them do not. Battens rot when the felt below fails and water sits on the timber. Felt becomes brittle with age and can split along its length, particularly at low-pitch sections where water drains slowly.
Poor original workmanship accelerates every one of these problems. A roof that was not properly ventilated traps condensation against the timbers from the inside, causing rot that has nothing to do with the weatherproofing above. Inadequate lap on felt, tiles fixed without appropriate nailing in exposed positions, or ridge tiles bedded without a proper mortar mix - any of these can shorten a roof's life significantly.
Previous patch repairs can also create problems. Mismatched tiles allow water to track around poorly bedded edges. Roof cement applied as a quick fix cracks and lets in more water than it keeps out. If a roof has had multiple repairs over the years, the cumulative effect can be more disruptive than a single clean replacement would have been.
For pitched roofs, tile choice matters. Clay tiles are heavier and more expensive but typically outlast concrete by a significant margin - a well-made clay tile can last 60 to 100 years under normal conditions. Concrete tiles are more affordable and widely available but tend to become porous over time as the surface degrades, which is when moss colonises more aggressively.
Natural slate is appropriate for certain property types, particularly those built before the Second World War where the original specification called for it. Reclaimed Welsh slate is available, though cost and provenance vary. Spanish and Brazilian slate are alternatives at lower price points, though the quality range is wide and it pays to ask about thickness and origin.
Underneath the tiles, modern installations use a breathable membrane rather than the traditional bitumen-felt. A breathable membrane allows water vapour to escape from the loft space while keeping wind-driven rain out, which reduces condensation problems and extends the life of the battens and timbers below.
A complete re-roof is not just swapping old tiles for new ones. Scaffolding is erected around the entire elevation being worked on. The old tiles are stripped back to the rafters, and the battens and felt are removed. The rafters and purlins are inspected, and any damaged or rotten sections are repaired or replaced before any new material goes on.
New treated battens are fixed at the correct gauge for the chosen tile, new breathable membrane is laid and lapped properly, and tiles are fixed in accordance with the manufacturer's specification - including appropriate nailing in exposed zones. Ridge and hip tiles are re-bedded in mortar or, increasingly, fixed using a dry-ridge or dry-hip system that removes the need for mortar and is less prone to cracking over time.
Flashings are renewed at every junction. If there is a chimney, the lead work is replaced as part of the re-roof rather than left from the previous installation. The job is not finished until gutters are cleared of tile debris and the site is clean.
Before you commit to a re-roof with any contractor, it is worth asking the following:
A roofer who can answer these questions clearly and specifically is a roofer who understands what the work actually involves. Vague answers should prompt further questions.
We install new roofs on homes across Norwich and the surrounding area, including properties in Poringland, Costessey and the villages beyond. If you are seeing any of the signs described above, call us to arrange a roof survey so you know exactly what you are dealing with before making any decisions.
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Call any time. Calls are answered day and night and passed straight to our roofers.
