Onduline Roofing Derby | Installation & Repair Service

Call: 01332-529704

Onduline is the lightweight bitumen-based sheet most Derby and Derbyshire outbuildings need when a timber frame was never built to carry tile, slate, or heavy corrugated metal. We install, repair, and re-fix Onduline Classic, Onduvilla, and Easyline sheets on garages, sheds, stables, and barns across the city and the villages around it.

• IPAF & PASMA Certified Team for Barns, Stables & Taller Outbuildings
• Free Drone Roof Survey With a Written, Itemised Quote
• Over 20 Years Fitting & Repairing Onduline Roofs Across Derby & Derbyshire

Onduline roofing is commonly used on garden sheds, summer houses, home workshops, garages, carports, horse stables, animal shelters, agricultural buildings, barns, farm outbuildings, lean-to extensions, covered walkways, chicken coops, kennels, log stores, home offices, and garden rooms. It is available in black, green, red, and brown, so it can be matched to existing buildings or blended naturally into a garden setting.

Signs your Onduline installation may have been done incorrectly:

• Sheets bowing or sagging between supports
• Water dripping from large patches rather than a single point
• Nail heads visible on the sheet surface without washer caps
• Ridge piece lifting or separating at the ends
• Frost collecting on the underside of the sheets in winter

We carry out a free roof inspection across Derby and Derbyshire. We tell you honestly whether a re-fix will solve the problem or whether the sheets need replacing. No call-out fee. No pressure. Just straight answers.

Homeowners in Oakwood and Spondon with older garage roofs often ask whether Onduline is worth choosing over standard felt, EPDM rubber, or metal corrugated sheets. Here is a straight comparison.

Standard shed felt on a pitched roof typically needs replacing every 8 to 12 years. It splits along the laps, lifts in high winds, and deteriorates fast if there is any pooling. Onduline holds a 15-year waterproofing warranty and, when fitted correctly on a sound frame, regularly outlasts it. It does not peel, lift at the edges, or split in the cold. Onduline is genuinely a 'fit and forget' upgrade from felt — and it costs far less in the long run.

Compared to steel sheets, Onduline is quieter in heavy rain, lighter to handle, and does not require the same condensation management that an uninsulated metal roof demands. It is also far less likely to draw planning objections on residential outbuildings in Derby, where reflective metal sheeting can cause issues with neighbours and planning officers, particularly in tighter streets across Normanton and Spondon.

EPDM rubber is an excellent flat roof material — but it is not designed for pitched outbuilding applications. If your garage or shed has a pitch, Onduline is the more practical choice. A properly qualified roofer installs Onduline faster than a rubber membrane system, with fewer joints and less risk of edge-seal failure on a pitched surface.

Onduline Easyline: a compact version at 1m x 0.76m, designed for smaller DIY jobs — playhouses, log stores, lean-to canopies. On a full professional installation covering a garage or stable, we use Classic. Easyline requires more sheet joints on larger surfaces, which creates more potential leak points. We advise you on the right product at the free survey stage. If you already have Classic sheets and need replacements, we source matching sheets in the correct colour so your roof looks consistent.

Getting the preparation right is what separates a roof that lasts from one that leaks within a year. Before we fit any Onduline roofing across Derby or Derbyshire, we check three things.

Onduline Classic requires a minimum roof pitch of 5 degrees. Below that, water does not drain fast enough and pooling becomes a problem. Most Derby garages and garden buildings comfortably clear this, but low lean-to structures — particularly in areas like Breadsall and Borrowash — sometimes need checking. If your pitch is borderline, we measure it on site with a digital level before a single sheet goes up.

At pitches over 15 degrees, purlins must be no more than 61cm apart. At lower pitches, tighter spacing is required. If your existing frame has purlins spaced wider than the spec, we add intermediate purlins before fitting the sheets. This is a straightforward carpentry task — but it cannot be skipped, and many installation failures in Derby can be traced directly back to this single point.

We calculate the exact number of sheets required, including side and end overlaps, ridge coverage, and verge allowances. You get a precise, written, itemised sheet count before you commit to anything — no mid-job surprises. If you are in Breadsall, Borrowash, or anywhere in Derbyshire and planning a new outbuilding, permitted development rules may affect the permitted size and roof profile. We flag any planning considerations at the survey stage, at no charge.

1. Fix verge elements to the sidewalls of the roof frame before any sheets are laid
2. Lay sheets from the bottom up, working away from the prevailing wind direction
3. End laps overlapped by a minimum of 17cm at pitches between 5–15 degrees; 15cm at steeper pitches
4. Side laps overlap by one full corrugation
5. Fix every corrugation at eaves, ridge, and overlaps using Onduline PP monobloc nails or Universal screws with washer caps correctly seated
6. Fix every second corrugation at intermediate purlins, in a staggered pattern
7. Fit the ridge piece to overlap sheets by at least 12cm, oriented against the prevailing wind
8. Fit apron flashing at all wall abutments using Onduline flexible apron pieces shaped precisely to the corrugation profile

We work across Derby, Long Eaton, and Ilkeston, including tight-access sites where outbuildings sit close to fences or neighbouring boundaries. Our team works carefully in confined spaces and leaves every site clean. Sheet offcuts are removed and disposed of responsibly. Call 01332-529704 to book your free survey and receive a written, itemised quote before any work begins.

Most domestic Onduline roofs in Derby do not need a Building Regulations application — they fall under Permitted Development and sit below the formal notice threshold. But there are two situations where compliance genuinely matters, and where an unverified installation can cause serious problems down the line.

Onduline Classic does not carry an External AA fire rating as standard. UK Building Regulations under Approved Document B require an AA-rated roof covering on certain building types — including structures positioned within one metre of a property boundary. If your garage or outbuilding sits close to a neighbouring property in areas like Normanton or Spondon, this matters. The fix is not to replace the sheets — it is to apply an AA-rated surface treatment over them. We identify whether this applies at the survey stage and advise on the correct treatment.

If you are a landlord with rental outbuildings or an HMO in Derby's DE1 postcode area, a written compliance check gives you documented evidence that your roof meets applicable standards — useful for insurance claims, mortgage valuations, and local authority HMO inspections. If a shed or stable manufacturer installed your Onduline roof and it has since failed, you may have a legal claim against the original installer. We can produce a written inspection report describing exactly what was installed, what was done incorrectly, and what proper installation would look like.

Derby City Council building control follows Approved Document B. Conservation area properties in Allestree and Darley Abbey face additional material conditions — we are familiar with both and can advise at the survey stage.

How to fix condensation on an Onduline roof:

• Improve cross-ventilation inside the building — gaps at the eaves on opposite sides is the most effective fix
• Fit a ventilated batten layer below the sheets where the structure allows
• Reduce the moisture source inside the building — stored green timber, wet soil floors, and unventilated tools or machinery all contribute

Condensation does not mean your roof needs replacing. It means the building needs better airflow. We assess this at inspection and give you practical, no-nonsense recommendations — not an unnecessary replacement quote. Onduline sheets are not designed for foot traffic — if you need to access the roof, you need a crawling board laid across the corrugations to spread your weight, as walking directly on the sheets will crack them. Onduline sheets are made from 50–60% recycled material and are not classified as hazardous waste, so they can be taken to a licensed household waste recycling centre at end of life.

• Supply and fit of Onduline Classic corrugated bitumen sheets on garages, sheds, stables, and barns, fixed with the overlap and nailing pattern the product spec calls for at the roof's actual pitch
• Onduvilla tile-profile sheets fitted where a slate or tile appearance is wanted, typically on outbuildings standing close to a house or where the roof needs to look the part
• Easyline sheets for smaller sheds and lower-cost outbuildings where a full Classic specification isn't needed
• Ridge caps, eaves filler strips, and verge and flashing details fitted to manufacturer specification at every junction, not just along the main roof slope
• Replacement of individual cracked, split, or wind-lifted sheets without re-roofing the whole structure, provided the surrounding sheets and battens are still sound
• Re-fixing sheets that have worked loose from their original nails or screws, usually the result of the wrong fixing pattern at first install
• Extra battens fitted where existing purlin spacing is too wide for the sheet span, one of the most common reasons an older Onduline roof starts to sag or leak
• AA fire-rated surface treatment where a building's proximity to a boundary requires it under Approved Document B, applied as part of the same visit rather than a separate call-out
• Timber batten and purlin repair or replacement where rot or woodworm is found once the old roof covering comes off
• Removal and disposal of old felt, corrugated iron, or existing Onduline sheets, so there's nothing left over for you to skip away yourself
• Matching sheet colour and profile as closely as possible on repair jobs, since Onduline has been through more than one product generation over the years
• Free drone roof survey and written, itemised quote before booking, covering barns and taller buildings a ladder alone can't safely inspect
• Checking and, where needed, replacing eaves fascia timber directly under the roofline where water has been tracking back off a worn sheet edge
• Advice on whether a repair or a full re-cover is the better long-term option for a roof that's part-way through its working life, given plainly rather than defaulting to the bigger job

• Structural rebuilding of a collapsed or unsound timber frame — that needs a carpenter or builder first, before roofing work can start
• Removal of asbestos-cement sheets, which needs a licensed asbestos contractor and is quoted and arranged separately
• Guttering, fascia, and soffit replacement — can be arranged alongside the roof but priced as a separate item on the quote
• Planning permission or listed building consent applications, which stay with the property owner even where we can point out what a project needs
• Painting or staining of the existing timber structure once the roof is on
• Scaffold hire for exceptionally tall or long multi-bay barns where towers or powered access platforms aren't practical for the span involved
• Solar panel or roof light fitting — can be priced alongside an Onduline job but is scoped and quoted as its own item
• Underfelt or breathable membrane upgrades beyond what the Onduline manufacturer spec calls for — available on request, priced as an addition rather than bundled in as standard

1. Free site visit and survey: We come out, or fly a drone over taller barns and multi-bay buildings, to check pitch, frame condition, purlin spacing, and access before quoting anything. Where a stable block or field shelter has more than one roof needing attention, all of them get looked at on the same visit.
2. Written, itemised quote: A fixed price broken down by sheet type, quantity, battening, and any fire treatment needed, so nothing needs querying once work starts. A provisional start date is given alongside the price.
3. Strip and prepare: Old felt, sheeting, or damaged Onduline comes off, rotten battens and purlins are replaced, and extra battens go in wherever the existing spacing is too wide for the new sheet span.
4. Fit the new Onduline sheets: Sheets go on with the correct overlap and fixing pattern for the pitch, followed by ridge caps, eaves strips, and flashing at every junction, so water has nowhere to find a way in.
5. Fire treatment where required: Where the building's distance from a boundary calls for it under Approved Document B, the AA-rated treatment is applied during the same visit rather than scheduling a return trip.
6. Clear-down and final check: Offcuts, old materials, and packaging are taken away, and we walk the roof with you before calling the job finished.

Onduline roofing costs vary from job to job because no two outbuildings are the same. The main factors are which product the roof needs — Classic for a garage or stable, Onduvilla where a tiled look matters, or Easyline for a small shed — plus the sheet count and overlap allowance the roof area requires, and how much of the existing timber frame can be reused. A roof with wide purlin spacing needs extra battens fitted before a single sheet goes up, and a frame with rot or woodworm under the old covering adds carpentry time before the roofing itself can start.

Access plays its own part in the figure: a single-storey garage roof reached from a ladder costs less than a tall barn gable that needs a powered platform or a mobile tower booked in for the day. An AA-rated fire surface treatment, needed where a building sits close to a boundary under Approved Document B, is a separate cost on top of the sheet price where it applies, and disposal of the old roof covering is priced by the skip or tip run it takes rather than folded invisibly into the labour rate.

Repair pricing works differently to a full re-roof: a single sheet swap on a stable or field shelter is priced on the sheet, the fixings, and the time on the ladder or tower, not against the whole roof area, so a small repair job stays a small repair price. Because pricing depends on pitch, access, frame condition, and product choice, we don't quote blind over the phone — every job gets a free site visit and a written, itemised price before anything is booked. Booking a repair as soon as a sheet cracks or lifts is cheaper than waiting until a wet season has had a chance to get into the battens underneath.

Most of the Onduline call-outs we get trace back to the same handful of mistakes: fixings driven through the crown of the corrugation instead of the overlap, sheets lapped the wrong way against the prevailing wind, or battens spaced for tile rather than a lightweight bitumen sheet. Two decades fitting and correcting Onduline roofs across Derby and Derbyshire means we spot which of those a roof already has before the first new sheet goes down.

Barns, stables, and taller outbuildings bring their own access problem, and that's where the team's IPAF certification for powered access equipment and PASMA certification for mobile tower work earns its keep, covering most farm and equestrian roofs without a scaffold booking or a ladder taking the strain. A scaffold booked for a single barn roof can sit for days waiting on a hire slot, while a tower or platform goes up the same morning the quote is agreed.

Stables and field shelters also come with their own set of practical constraints that a straightforward house re-roof doesn't — livestock underneath while work is going on, feed and bedding that needs to stay dry through the job, and gateways or yards that a scaffold tower would otherwise block for days. Working from a drone survey and a mobile tower rather than a full scaffold keeps a working yard usable while the roof itself is being fitted or repaired.

Derby Roofers installs and repairs Onduline roofing across Derby city and throughout Derbyshire. We carry no call-out fee across any of the following areas. Not sure if we cover your area? Call 01332-529704 — if we can get to you, we will.

If you have read this far, you already know more about Onduline roofing than most people who call us — and that means you are in a great position to make a smart decision about your roof.

Whether you need a new Onduline roof fitted correctly from day one, or you have an existing roof that is leaking, sagging, or failing, we are the Derby team to call. We have been working on roofs across Derby and Derbyshire for over 20 years. We know the local building stock, the local weather, and the mistakes that local shed companies make. We never recommend replacement when a repair will do.

• ✅ IPAF & PASMA certified team for barns, stables & taller outbuildings
• ✅ Free drone roof survey with a written, itemised quote
• ✅ Over 20 years fitting and repairing Onduline roofs across Derby & Derbyshire
• ✅ No call-out fee, no pressure — just straight answers

Your Onduline roof deserves to be done properly — call us today and let's get it right. Available Mon–Fri 7:30am–6:00pm | Sat 8:00am–4:00pm | Emergency cover 24/7.