New Roofs in Dereham

How we handle new roofs

New Roofs in Dereham - What You Need to Know Before You Start

A new roof is one of the biggest investments you will make in your home. Get it right and you will not need to think about it again for 40 or 50 years. Get it wrong - wrong materials, poor detailing around chimneys and valleys, underlay cut short - and you will be paying for remedial work within a few years. This page sets out what a proper new roof involves, what it costs, what materials suit Norfolk properties, and what questions to ask any roofer before you sign anything.

We cover Dereham and the surrounding towns and villages. Whether you have a mid-terrace Victorian property with a steep pitched roof or a post-war bungalow with a low-pitch extension, the approach changes with the building. There is no single answer that fits every job.

When Does a Roof Need Replacing - and When Does It Just Need Repairing?

This is the first question most homeowners ask, and it is a fair one. A repair is always cheaper in the short term, but it is not always the cheaper option over time. If a roof is more than 50 to 60 years old and has been repaired several times, further patching is often false economy. The tiles themselves may be fine, but the battens, underlay and lead flashings underneath will be failing across the whole surface, not just in one place.

Signs that a full replacement is worth considering include: widespread moss and lichen that has lifted and displaced tiles, sagging between rafters visible from inside the loft, light visible through the underlay or boards, multiple leaks appearing in different places, and mortar ridges that are crumbling along most of their length rather than in isolated spots. A single slipped tile after a storm is a repair job. Crumbling mortar on every ridge course is a replacement conversation.

The slate on many older roofs can last well over a century, but when the nibs or nails fail, there may be little below to slow water ingress. Where a roof has failed in this way, a roofer may recommend stripping everything, adding a breathable membrane underlay, re-battening and re-laying the original slates where they are sound enough to reuse.

Pitched Roof Materials - Slates, Concrete Tiles and Clay Pantiles

Choosing the right material matters both for the look of the finished roof and for its long-term performance. Norfolk has a strong tradition of using clay pantiles on older properties, particularly on farm buildings, barns and many cottages across the county. Pantiles are heavier per square metre than most concrete interlocking tiles, so the roof structure needs to be checked before you switch material types.

The main options for pitched roofs are:

• Natural slate - Welsh or Spanish slate gives a clean, thin profile and a long service life. Welsh slate is harder to source and more expensive; Spanish slate is widely available and performs well in the UK climate. Expect to pay roughly £80 to £120 per square metre for supply and fit, depending on slate grade and roof complexity.
• Concrete interlocking tiles - the most cost-effective option for most standard pitched roofs. Colours and profiles vary widely. A new roof in concrete tiles typically costs £60 to £95 per square metre installed, though valley work, dormers and chimney details add to the price.
• Clay pantiles - traditional across Norfolk and the right choice where planning permission or a conservation area requires them. New clay pantiles cost more than concrete tiles but less than natural slate. Reclaimed pantiles can be sourced to match existing buildings, though checking for frost damage and sizing consistency is essential before reuse.
• Clay plain tiles - used on many Victorian and Edwardian properties. These have a shorter gauge and require more tiles per square metre than interlocking types, making them slower to lay and slightly more expensive, but they give a fine-grained finish that suits older properties well.

A new pitched roof in Dereham typically costs between £5,000 and £18,000 for a standard three-bedroom semi-detached or detached house, depending on size, material choice, access and the complexity of the roof shape. These are working figures for budgeting purposes - an accurate quote requires a proper survey.

Flat Roof Replacement - Options Beyond Mineral Felt

Many properties have flat or low-pitch sections, often over extensions, garages or bay windows. The traditional three-layer mineral felt that was standard until the 1990s has a realistic lifespan of around 10 to 15 years in good conditions, and often less on south-facing roofs where ultraviolet degradation accelerates. When felt starts to blister, crack or pond water consistently, replacement is usually the right call.

Two systems now dominate flat roof replacement work: torch-on felt (also called modified bitumen or SBS felt) and EPDM rubber membrane. Torch-on felt is a heavy-duty reinforced system that gives a service life of 20 years or more when properly installed. EPDM is a single-ply synthetic rubber that is cold-applied using adhesive, highly resistant to UV and temperature extremes, and increasingly popular for domestic extensions. Both systems are well suited to the Norfolk climate. EPDM in particular handles the freeze-thaw cycles that can shorten the life of older felt systems.

Flat roof replacement costs in Dereham typically range from £70 to £120 per square metre installed, with the final figure depending on insulation requirements, drainage alterations and access. Building regulations may require upgrading the insulation when a flat roof is replaced, which adds cost but improves heat retention in the room below.

The Work Itself - What Happens When a New Roof Goes On

Understanding the process helps you ask the right questions and recognise whether a job is being done properly. A new roof is not just tiles on top - it is a layered system, and each layer depends on the one below it being done correctly.

The sequence on a typical pitched roof replacement runs as follows:

• Scaffolding is erected before any stripping begins. Any roofer working without scaffold on a full replacement is cutting corners on safety, which usually means corners are being cut elsewhere too.
• Old tiles, battens and underlay are stripped. The rafter ends, wall plates and any rotten timber are checked and replaced where needed. This is the stage where hidden problems - rotten rafters, broken roof members, inadequate ridge boards - come to light.
• Breathable membrane underlay is laid over the rafters, lapped correctly at joins and dressed into gutters. The underlay is the second line of defence if tiles are displaced in a storm.
• Tiling battens are fixed at the correct gauge for the tile being used. Gauge errors here mean tiles do not overlap correctly, letting water in.
• Tiles or slates are fixed. Ridge tiles are bedded and pointed in mortar or fitted with a dry-fix system, which avoids mortar failure over time.
• Lead flashings are dressed around chimneys, against abutment walls and in valleys. Lead thickness matters - a 6-code lead (about 1.8 mm) is typical for stepped flashings on chimneys.
• New guttering and fascia boards are often replaced at the same time, since the scaffold is already up and the old ones may be at the end of their life.

A full roof replacement on a three-bedroom house usually takes between three and seven working days, depending on size and complexity. Weather will affect the programme - tiles should not be laid in driving rain or frost.

Soffits, Fascias and Guttering - Why They Are Often Done at the Same Time

Timber soffits and fascias rot from the back where moisture sits against the wall, often without being visible from the ground until the damage is advanced. When the scaffold is up for a new roof, replacing deteriorating timber boards with uPVC is straightforward and avoids a second scaffolding cost later. uPVC fascia and soffit boards need no painting and will not rot. They are available in white, black, anthracite grey and a range of wood-effect finishes.

Guttering is also worth reviewing at the same time. Cast iron guttering is durable when maintained but heavy. Half-round uPVC or ogee profile guttering is a practical replacement. If the existing cast iron is in good order and the aesthetic matters to you, cast iron can be retained and repainted.

Chimneys - Repair, Reduce or Remove?

Chimneys that are no longer in use are a common source of roof problems. The lead flashings around the base are often the first point of water ingress, and the mortar pointing on the stack itself deteriorates faster than on sheltered brickwork because it is exposed on all four sides at roof level. A disused chimney also allows a cold air column to run through the house, reducing thermal efficiency.

The options are repairing the stack and its flashings, reducing it to just above roof level and capping it, or removing it entirely below roof level and making good the tiles and ceiling below. Chimney removal costs in the UK typically range from £1,000 to £3,500, depending on stack height, access and whether the chimney breast inside needs to be retained or also removed. Planning permission is not normally required for chimney removal, but if you are in a conservation area or the property is listed, you should check before proceeding.

Loft Insulation and Ventilation When Re-Roofing

A roof replacement is the right time to review loft insulation. Building regulations set a U-value target for loft insulation, and around 270 mm of mineral wool is typically enough to meet it - that is insulation at ceiling level with the loft space left cold. If you are converting the loft, the insulation goes between and below the rafters instead, and you will need to leave a ventilation gap between the insulation and the underlay to prevent condensation building up.

Breathable (vapour-open) underlay membranes have largely replaced traditional impermeable felt in modern re-roofing work. A breathable membrane allows moisture vapour from inside the house to escape through the roof structure rather than condensing on the underside of an impermeable layer. This matters on older properties where vapour control inside the building was not a design consideration.

If your roofer is proposing to lay a new breathable underlay over an existing cold loft with adequate ventilation at eaves and ridge, the loft ventilation calculation changes. A good roofer will confirm the ventilation provision before laying up.

Choosing a Roofer in Dereham - What to Look For

Roofing sits alongside electrical and structural work as one of the trades where a poor job creates serious and expensive problems. Price is an obvious starting point, but the cheapest quote is not always the one to take. Ask these questions before committing:

• Will you provide a written, itemised quote? A quote that just says "re-roof, supply and fix" with a total price tells you nothing about the specification.
• What underlay are you using, and is it breathable? Which tile or slate are you supplying, and from where?
• How are the ridges being fixed - mortar bedding or dry-fix? Both can be appropriate; knowing which tells you something about how they work.
• What happens if you find rotten timbers when you strip? Is that included or will it be an extra?
• Will you be using scaffold, and who erects it?
• How do you handle waste removal and skip permits if a skip will be on the road?

A roofer who can answer all of these clearly and without hesitation is a roofer who knows the trade. One who becomes vague when you ask about materials or methods is worth being cautious about.

New Roof Costs in Dereham - A Summary

A new pitched roof on a typical three-bedroom house in Dereham costs between £5,000 and £18,000, depending on size, pitch, access and materials chosen. Flat roof replacement on an average extension runs from £70 to £120 per square metre installed. Adding new uPVC fascias, soffits and guttering to a standard semi-detached while the scaffold is up typically adds £800 to £2,000 to the total cost. These figures should be used for budgeting only - every roof is different, and a proper price requires a site visit and a written quote.

If you are in Dereham or a nearby town or village and your roof is due for replacement, call us to arrange a visit. We will look at the roof, talk through the options that suit your property and give you a clear written quote before any work starts.