Solar PV installation involves structural roof preparation and weatherproof mounting, alongside certified electricians who handle the electrical work.
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Fitting solar panels is a roofing job as much as an electrical one. The panels sit on a mounting system that is fixed directly through the roof covering, and if that penetration is not sealed and flashed correctly, you will get water in. Our role is to make sure the roof itself is structurally sound before anything goes on it, to install the racking and mounting rails correctly, and to weatherproof every penetration so the finished installation is as watertight as the day before the panels arrived.
We work on both pitched roofs and flat roofs. On a pitched tiled or slated roof, the mounting hooks replace individual tiles or slates and are fixed to the rafters beneath. Aluminium rails run across the hooks, and the panels clip to the rails. On a flat roof, a ballasted or adhered frame lifts the panels to the correct angle without requiring penetrations through the membrane at all. A certified electrician then handles the inverter, cabling, and grid connection.
Before any work begins, a roof survey checks the condition of the covering, the age and spacing of the rafters, and whether the roof structure can take the additional load. Panels add roughly 10 to 15 kilograms per square metre. Most roofs built to standard UK practice handle this without any structural alteration, but an older roof with undersized timbers or significant existing damage may need attention first. It is far better to identify that at survey stage than after the scaffold is up.
For an average family house, a system of 10 to 14 panels rated at around 350 to 400 watts each gives a total capacity of roughly 4 kWp. That is currently the most common residential size. Supply and installation for a system in that range typically costs between £6,000 and £9,000, depending on panel specification, roof complexity, scaffolding requirements, and whether you add battery storage at the same time.
A smaller system of 6 to 8 panels (roughly 2.5 kWp) suits a smaller roof area or a household with modest daytime electricity use and will generally fall between £4,000 and £6,000. Larger systems of 16 panels or more (5 kWp and above) are possible where the roof area and orientation allow, and prices climb accordingly, often from £9,000 upward before battery storage.
Battery storage is worth considering from the outset, because retrofitting a battery to an existing installation later usually costs more than installing it alongside the panels. A 5 kWh battery currently adds roughly £2,500 to £4,500 to the total, depending on the make and capacity. It allows surplus generation during the day to be used in the evening rather than exported to the grid at a lower rate than you pay to import.
These are honest typical ranges based on current UK market pricing. Your own quote will depend on your specific roof and requirements, which is why a proper survey comes before any figure is confirmed.
Solar panels are expected to generate electricity for 25 years or more. The roof covering beneath them needs to last at least as long, because removing and refitting panels to carry out roofing repairs mid-way through that period is an added cost and inconvenience that is entirely avoidable. A common problem is that homeowners accept a solar quote without anyone properly assessing the roof first.
On a clay or concrete tiled roof, the tiles themselves rarely wear out quickly, but the felt underlay beneath them does. Underlay fitted before the 1990s is often a single layer of bitumen felt that has become brittle. On a natural slate roof, individual slates crack or slip, and the nibs that hold them can corrode. On a flat roof, EPDM rubber membranes generally outlast older felt systems, but any existing felt should be inspected for splits, blistering, or ponding water before panels go on.
If the roof needs remedial work, it is almost always more cost-effective to carry it out before installation rather than after. We can carry out roofing repairs or a full re-cover as part of the same visit as the solar survey, so you have a single point of contact and a single mobilisation of scaffold.
This is the part of solar installation that most homeowners give very little thought to at the point of purchase, and it is the part that most directly affects how much value you get from the system over its lifetime. A well-maintained solar installation on a sound roof will perform reliably for decades. A neglected one loses output gradually, and small problems that could have been caught early become costly ones.
Solar panels do not need servicing in the way a boiler does, but they do benefit from a visual inspection roughly every two to three years. The things to look for are: moss or lichen beginning to build up on the lower edge of the panels, debris collecting in the gap between the bottom panel and the roof surface, any cracked or loose roof tiles or slates near the mounting points, and any visible movement in the racking itself. None of these will cause immediate failure, but left unattended they shorten the life of both the roof and the mounting system.
Moss and algae growth on roof tiles directly below or around the panels is a common problem on older pitched roofs. Panels reduce the wind-scouring effect on the tiles they cover, which means organic growth takes hold faster in those areas. If moss spreads under the lower edge of a panel frame it can hold moisture against the flashing and eventually work it loose. Treating the surrounding roof surface with a biocide wash and then fitting moss-inhibiting strips is straightforward and inexpensive when done proactively; it is more disruptive and costly to deal with once growth is established under the panel frames.
The mounting hooks and rail fixings should be checked for any signs of corrosion at the same time. Quality aluminium racking systems are very durable, but the fixing bolts that pass into the rafter can corrode where they pass through older lead or aluminium flashing, particularly if the original installation did not use stainless steel fixings throughout. If you are buying a property with panels already fitted, ask when they were installed, who installed them, and whether any aftercare inspections have been carried out.
Dirty panels generate less electricity. Rainfall keeps panels reasonably clean for much of the year, but if you are near trees or agricultural land, a build-up of pollen, dust, or bird droppings on the lower panels can reduce output noticeably by late summer. Panels should be cleaned with purified water and a soft brush, ideally using a long-reach pole system from ground level. Pressure washers damage the panel surface and the seal around the frame and should not be used. A professional clean every one to two years is worth the modest cost if your monitoring data shows output has dropped.
All modern grid-tied inverters provide output monitoring, either through a display unit or via an app. Checking your generation figures once a month and comparing them against the same month in previous years is the single most useful thing you can do to catch a problem early. A drop in output in summer months when the system should be performing well is the first sign of a failing panel, a shading issue caused by a newly grown tree or a neighbour's extension, or a problem with the inverter itself.
Inverters typically have a lifespan of 10 to 15 years, which is shorter than the panels. Replacing an inverter is a planned maintenance cost rather than an emergency, and factoring it into your thinking when you first install the system means it does not come as a surprise. A string inverter replacement currently costs in the region of £800 to £1,500 fitted, depending on size and model.
After any significant period of gale-force wind or a hard frost, it is worth a visual check from ground level to confirm all panels are sitting flat and none of the surrounding tiles or slates have shifted. Wind can work loose a tile that was already sitting slightly proud, and frost can open up a small crack in a tile that was already weakened. Neither of these is caused by the panels, but because the roof around a panel array is harder to access than an open roof slope, small problems can be missed for longer.
If you spot a cracked tile near the panel rail, or if you notice a damp patch inside the property near the area directly below the panels, arrange an inspection promptly. Water ingress around a solar mounting point is almost always a failed flashing or a displaced tile rather than a fundamental fault with the system, and it is a straightforward repair if caught early.
The practical principle behind good solar aftercare is that you are maintaining two systems simultaneously: the electrical system above the roof surface, and the roofing system beneath it. If you maintain both, the ongoing cost is low. If you neglect the roofing element, you will eventually need to pay for panel removal, roofing repairs, and panel refitting, which can add £500 to £1,500 or more to what would otherwise have been a routine roofing repair.
Ask any roofer or solar installer you speak to what their aftercare process looks like and whether they can carry out combined roof-and-panel inspections. The answer tells you a great deal about whether they are thinking about the whole job or just the day of installation.
For homes in Hellesdon and the surrounding villages, the installer you want is one who understands roofing as well as solar. The electrical certification side is handled by the electrician; what the roofer adds is the structural and weatherproofing expertise that determines whether the installation is sound for the long term. A good installer will give you a clear written breakdown of what the roofing element includes, what the mounting system is made of, how the penetrations are sealed, and what you should do if you notice a problem after installation.
Neighbouring areas have housing types comparable to Hellesdon, and the same principles apply across all of them. If you have seen panels on houses nearby and want to understand how the installation was handled, the roof-level details are usually visible from the street: look at the flashing around the bottom of the bottom panel row and at the tile or slate condition around the mounting hooks.
Not every property suits a roof-mounted system. If the roof faces the wrong direction, is heavily shaded, or is in poor condition, a ground-mounted array in a garden or paddock is worth considering. Ground-mounted systems use a steel or aluminium frame anchored to concrete footings, and the panels are positioned at the optimal angle without the constraints of the existing roof pitch. Systems in the range of 4 kWp ground-mounted typically cost between £7,000 and £11,000 installed, slightly more than the equivalent roof-mounted system because of the groundworks and longer cable run. They are, however, easier to inspect, clean, and expand later.
Planning permission is not always required for ground-mounted arrays within the curtilage of a dwelling, but the rules depend on the size of the array and the proximity to boundaries and the house. It is worth checking permitted development rules for your property before committing to the design.
If you are considering solar panels for your home in Hellesdon, the sensible first step is a roof survey, not a sales call. A survey tells you the condition of the roof, the suitability of the structure, the best mounting approach for your covering type, and whether any preparatory roofing work is needed. From that point, any quotation you receive is based on your actual roof rather than an assumed one.
Call us to arrange a roof assessment for solar in Hellesdon. We cover Hellesdon and the surrounding area including Drayton, Taverham, Cringleford, Hethersett, and across to Wymondham and Mulbarton. We will tell you honestly what the roof needs and what the installation will involve before any commitment is made.
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Call any time. Calls are answered day and night and passed straight to our roofers.
