New Roofs in Loddon

Expert New Roofs
in Loddon

What a New Roof Actually Involves

A new roof is more than stripping off old tiles and laying new ones. A proper installation starts with a full assessment of the roof structure: the rafters, purlins, wall plates and any timber that has been carrying the old covering. If that structure is compromised, the new covering will fail prematurely no matter how good the materials are. We inspect every element before specifying materials, pitch tolerances and ventilation requirements.

For pitched roofs, the most common choices are concrete interlocking tiles, natural slate and fibre cement slate. Each has different weight loadings, so the underlying structure must be able to carry the chosen material. We also install new breathable membrane underneath and replace any damaged battens before the tiles go on. Ridge and hip tiles are rebedded or mechanically fixed, not just pointed, which is where many cheaper jobs fail within a few years.

Flat roofs on extensions and outbuildings are most often replaced using EPDM rubber membrane or reinforced felt systems. EPDM in particular has a long track record in the UK and handles temperature cycling well. The key to a flat roof that lasts is correct falls, adequate drainage and properly detailed upstands around any abutments or penetrations.

Warning Signs That a Roof May Need Full Replacement

This is the question most homeowners wrestle with: repair or replace? The honest answer depends on how much of the roof is failing, not just one or two obvious patches. Here are the signs that point toward replacement rather than repair.

• Widespread slipped or broken slates and tiles. When individual slates start slipping regularly across multiple roof sections, it usually means the fixings or nibs have deteriorated throughout. Replacing individual slates only delays the inevitable.
• Nail sickness. On older slate roofs, the iron nails used to fix slates corrode and expand, cracking the slate at the nail hole. This happens gradually across the whole roof because all the nails were installed at the same time. By the time you notice 10 or 15 failures, there are often another 50 quietly working loose. Repair costs quickly approach replacement cost.
• Sagging or undulating roof lines. A roof that looks wavy when viewed from the ground is telling you the structure beneath is moving, wet or rotten. This is a structural problem, not a tile problem, and no amount of surface patching will solve it.
• Daylight visible from the loft. Small gaps where light is coming through indicate that the covering has cracked, shifted or that the underlay has broken down entirely. Water will be following the same route.
• Persistent damp patches on ceilings after repairs. If a roofer has repaired the obvious points and interior damp continues, the fault is often widespread underlay failure or cracked tiles that are too numerous to find individually. At that stage, a full re-roof is more cost-effective than further piecemeal work.
• Moss and vegetation growth covering most of the roof. Moss retains moisture and, over time, forces its way under tile and slate edges. Extensive moss growth is a sign that the tiles have become porous or that the roof structure is staying wet rather than drying out between rain events.
• Flat roof blistering, cracking or standing water. Blisters in a felt flat roof indicate that moisture has got beneath the membrane. Cracks in the surface let in water directly. Standing water that does not drain within 48 hours of rain is a sign that the falls are wrong or blocked. Any one of these issues on an older flat roof usually means the whole membrane is near the end of its life.

What Causes Roofs to Fail

Understanding why roofs fail helps you decide when to act. Most roofs do not fail suddenly; they deteriorate over years through a combination of factors that accelerate one another.

Age of materials. Concrete tiles have a typical lifespan of 40 to 60 years. Natural slate, if it was good quality to begin with, can last 80 to 100 years, though the fixings rarely last as long as the slate. Felt flat roofs typically last 15 to 25 years depending on specification. Once a roof is approaching or past these ages, the rate of failure increases sharply.

Poor original installation. A common problem is a re-roof carried out years ago where the installer did not replace the underlay, used the wrong gauge battens or skimped on lead flashing detail at chimneys and abutments. The tiles look fine but the system underneath is inadequate, and water has been tracking in slowly for years.

Blocked or poorly designed ventilation. Roofs need to breathe. When ventilation is blocked, condensation builds up inside the roof space, wetting the timbers from below. Roofers sometimes find that the external covering is perfectly sound but the rafters are damp and starting to decay because the roof has never had proper eaves or ridge ventilation.

Flashing and leadwork failure. Lead around chimneys, dormers, valleys and where a roof meets a wall is often the first thing to fail. When lead cracks, lifts or pulls away from its chase, water enters the roof structure directly. If this has been happening unnoticed for a number of years, the timber below may need replacing before a new covering can be laid.

Storm and impact damage. A single storm event can displace enough tiles to let water in across a wide area. If the underlay has already degraded, even a modest storm can cause significant internal damage quickly. Properties in exposed positions are more vulnerable to this type of accelerated deterioration.

What to Ask Before Work Starts

Before you commit to any contractor for a new roof, ask them to explain what they found during their inspection and why they are recommending the materials they have specified. A good roofer will be able to tell you the condition of the timber structure, what underlay they are using and why, and how they will handle any lead or flashing details. If a quote does not break these elements down, ask for clarification.

Ask specifically whether the quote includes new battens or reuse of existing ones, whether the fascias and soffits are included or excluded, and how they plan to handle any structural timber that turns out to be damaged once the old covering is stripped. These are the areas where unexpected costs most often arise on a new roof project.

Typical Costs for a New Roof

New roof costs in Norfolk typically range from £5,000 to £9,000 for a standard semi-detached or terraced house, depending on roof size, pitch, material choice and the condition of the structure once stripped. Larger detached houses with complex hips, valleys and chimneys can run to £12,000 or more. Flat roof replacements on extensions are generally costed by the square metre, with EPDM systems typically falling in the range of £80 to £130 per square metre installed.

These are not small sums, and the temptation to choose the cheapest quote is understandable. But a new roof that fails at the flashings or because the structure was not properly addressed will cost significantly more to put right than a well-specified job done once.

Get a Survey for Your Loddon Property

If you have noticed any of the warning signs above, or if your roof is approaching 30 or 40 years old, the right first step is a proper inspection rather than waiting for a leak to confirm the problem. Call Norwich Roofers to arrange a roof survey on your Loddon home and we will give you a straight assessment of what is needed and what it will cost.