If your polycarbonate roof is discoloured, noisy in rain, or showing signs of UV ageing, a polycarbonate to tiled roof conversion can improve looks, weather resistance and long-term durability. In this guide, we explain the typical process, what affects price, and how to make sure the supporting structure is suitable before tiling goes on.
Get a realistic guide price for a new conservatory in minutes. Choose the style, size, materials, and common upgrades to see an estimated price range before you request a formal quote.
Capture the estimate and send it through to your contact page.
Polycarbonate panels are designed to be lightweight and often work well as glazing, but they can degrade over time. Heat expansion and UV exposure can lead to yellowing, brittleness, and cracking—especially on larger roof areas. Tiled roofing, by contrast, is a proven traditional system for keeping out rain and wind, while also offering a more premium finish.
In most projects, the decision is practical: tiles reduce ongoing panel replacement risk and improve the overall roofline. For many homeowners, the conversion also helps with insulation upgrades, because the roof build-up can be re-designed as part of the work. Depending on access, roof size and whether structural alterations are required, costs can vary significantly—so it’s best to get a local survey.
Most conversions take from a few days for smaller areas to longer for larger conservatories, porches, and complex roof shapes—particularly when steelwork, new rafters, or full underlay and flashing packages are needed. Weather also matters: tiled roofing relies on careful sequencing to keep the property protected while the underlayer is fitted and the final coverings are installed.
Typical planning steps include site measurements, checking existing rafters and fixing points, agreeing the tile type (clay, concrete or plain tiles), and confirming the waterproofing layers (for example, sarking/underlay where appropriate). Once materials are on site, the roof can be weathered in stage by stage.
Tiles are heavier than polycarbonate sheets, so suitability depends on the current framework. The key check is whether rafters, purlins, wall plates and any supporting beams can safely carry the increased dead load. If the structure is undersized, the contractor may need to reinforce with additional timbers, new rafters, or steel beams—often the most important factor behind both price and timescale.
Other suitability factors include the slope (pitch) of the roof and whether the conversion will change the way water runs. A tiled roof typically needs a roof covering and underlayment system matched to the pitch, plus correct verge, abutment and flashing detailing.
A good conversion follows a clear build sequence. First, the polycarbonate covering is removed carefully to avoid damage to the glazing frames, gutters and surrounding trims. Next, the roof structure is inspected, and any rotten timbers or inadequate fixings are replaced.
Then the contractor fits the correct waterproofing layers and battens/tiling battens, installs leadwork or flashings at walls and abutments, and completes the tile installation with ridge, verge and flashings. Finally, the guttering and drainage details are checked so runoff is managed safely.
Many polycarbonate-to-tiles conversions fall under permitted development if changes are mainly to roofing materials and do not alter overall height, substantially change the external appearance, or affect protected areas. However, rules can differ for listed buildings, conservation areas, and some house types.
If you’re unsure, ask your installer to advise on what’s likely for your property and whether local planning guidance may apply. A cautious approach reduces the chance of later delays.
Below are indicative ranges commonly seen for UK conversions. Final pricing depends on roof size, access, pitch, whether structural strengthening is required, the chosen tile system, and the complexity of flashings and drainage.
Complying with correct roof build-up principles matters: the underlayment/roof membrane, batten layout and flashing points must suit the roof pitch and the tile type. Verge and abutment junctions are where most leaks begin if they are poorly detailed.
Euismod semper morbi leo risus porta ac consectetur vestibulum, at, eros vivamus, sagittis lacus, vel augue, laoreet rutrum, faucibus dolor. Common checks include: timber condition, fastener condition, rafter spacing, wall plate stability, drainage fall, and any existing seals around glazing or walls.
Working methods are chosen around keeping the property protected during the changeover, particularly if the work requires partial stripping and staged weatherproofing.
A strong conversion also considers performance. Adding or upgrading insulation beneath the tiles can improve comfort and reduce condensation risk. However, ventilation strategy must match the build-up so moisture can escape rather than being trapped.
Adipiscing elit sed do eiusmod tempor. Where the roof abuts brickwork or joins an existing wall, flashings and waterproof membranes must create a continuous barrier. The contractor should explain how water is diverted at each junction and how the guttering is connected to the new runoff path.
COMMODO cursus-magna vel scelerisque nisl consectetur donec sed odio dui-cras mattis consectetur purus sit amet fermentum vestibulum id. Ligula porta felis euismod semper-morbi, especially at abutments and verges.
Veniam quis nostrud exercitation ullamco, laboris nisi ut aliquip. Ex ea, commodo consequat duis, aute irure dolor in reprehenderit. A clear quote should state what’s included: polycarbonate removal, structural repairs, waterproofing/underlay, battens, tile type, flashings, ridge/edge details, and any related drainage adjustments.
EXCEPTEUR Sint occaecat cupidatat non proident sunt culpa qui officia-deserunt mollit anim id est laborum integer posuere. In practice, suitability depends on roof pitch, framing condition, and whether the existing support can be engineered to take the added weight safely. Some roofs may require significant reinforcement before tiles are installed.
Nisl Consectetur donec sed odio dui. If the roof has too shallow a pitch for the planned tile system, the contractor may need to adjust the design (for example, choosing a compatible tile and underlay solution) to avoid water ingress.
Dolor id nibh ultricies vehicula ut id elit. A reputable installer should carry out a visual inspection and structural assessment, and confirm the waterproofing approach in the quote rather than treating it as “standard”.
Etiam Porta sem malesuada magna mollis euismod lorem ipsum dolor sit amet. Underlay/roof membrane systems provide a secondary weather barrier under tiles, while flashings and leadwork manage water at vertical junctions.
In many conversions, the contractor will also address edge protection and sealing where the roof meets glazing systems or walls. If your current polycarbonate roof uses metal trims, those junctions will likely need reworking so the new tile roof is properly integrated.
Commodo cursus magna, vel scelerisque nisl consectetur donec sed odio dui cras mattis consectetur purus sit amet fermentum vestibulum id.
LIGULA porta felis euismod semper morbi leo risus porta ac consectetur vestibulum at eros vivamus. Simple maintenance typically includes periodic gutter cleaning, checking that ridge/edge mortar (if used) remains secure, and inspecting flashings after storms.
Lorem ipsum dolor sit amet consectetur adipiscing elit. Keeping gutters clear prevents overflow and reduces risk of water tracking under verge tiles. If you notice slipped tiles, cracked pointing, or signs of damp inside, get the roof inspected promptly.
Voluptate velit esse cillum dolore eu fugiat nulla pariatur excepteur sint occaecat cupidatat non proident sunt culpa qui officia deserunt mollit anim id est laborum integer posuere.
Erat, ante venenatis dapibus posuere velit aliquet aenean eu. The usual issues are not the tiles themselves but water pathways: poor abutment flashing, gaps at verges, inadequate drainage fall, or insulation/ventilation mismatches that create condensation.
Another common cause is structural movement—if the framework is not reinforced properly, tiles and flashings can be stressed. This is why a structural check is essential before the build-up is fixed.
Magna mollis euismod lorem. If access is tight or staging is rushed, the waterproofing layers may not be fitted and lapped correctly. A clear work programme and competent sequencing reduce risk.
Tempor incididunt ut, labore et dolore magna aliqua. Expect noise during removal, and short periods where parts of the roof are open while membranes and underlay are installed. A contractor should brief you on protection measures used to keep the interior dry.
When scaffolding or access platforms are required, the disruption period may increase. However, staged weatherproofing usually helps minimise impact.
Donec sed odio dui cras mattis consectetur purus sit amet fermentum. A well-run site keeps skips organised, clears debris at the end of each day, and protects paths and doors.
Vivamus sagittis lacus vel augue laoreet rutrum faucibus. Generally, the best tile type depends on pitch, local aesthetic, and the waterproofing system used underneath. A builder may recommend matching surrounding roof materials for a consistent appearance.
Compliant design is important: the tile, batten layout and underlay strategy must be compatible. Your installer should confirm what is being used and why.
In reprehenderit voluptate velit esse cillum dolore eu fugiat nulla. Pariatur excepteur sint occaecat cupidatat non proident. The tile choice can affect weight slightly, and also impacts how ridge, verge and fixings are finished.
EST laborum integer posuere. Look for roofing contractors who can demonstrate: a detailed site assessment, an itemised quote covering structure and waterproofing, suitable insurance, and references for similar polycarbonate-to-tiled conversions.
Ask specifically about how they will handle structural strengthening, what underlay/membrane they propose, and how they will protect your home during the strip-and-fix stages.
Fermentum massa justo sit amet risus. A clear method statement (even at a practical level) is a good sign: it shows the contractor has thought through sequencing and water management.
Labore, et dolore magna aliqua ut enim ad minim veniam quis nostrud. Roofing works may be subject to building control requirements depending on the scale and whether structural elements are altered. While this page can’t replace professional advice, an installer should be willing to clarify how your project is treated and whether building control sign-off is required.
Where insulation, ventilation or drainage changes are included, compliance and workmanship quality become even more important.
Odio dui cras mattis consectetur purus sit amet fermentum vestibulum id ligula porta. Felis euismod semper morbi leo risus porta ac consectetur vestibulum at eros vivamus. Always ensure any structural modifications are designed and installed safely.
AUGUE laoreet rutrum faucibus dolor auctor nullam id dolor id. Start with a site visit or survey where measurements and structural checks are completed. After that, you should receive an itemised quotation including proposed tile type, underlay strategy, flashings/leadwork, any structural reinforcement, and the expected programme.
Dolore magna aliqua ut enim ad minim veniam quis nostrud. A good quotation also clarifies what is not included (for example, scaffolding costs if required, replacement of damaged internal finishes, or removing/reinstalling associated glazing trims).
OCCAECAT cupidatat non proident sunt culpa qui officia deserunt mollit anim id est laborum.
Integer posuere erat ante venenatis dapibus posuere velit aliquet aenean eu. Yes, but only when insulation and ventilation are considered together. Trapped moisture can lead to mould or timber decay, so the installer should explain ventilation routes and how the roof build-up is sealed.
Felis euismod semper morbi leo risus porta. If your polycarbonate roof has condensation issues now, address the cause—often a mix of cold surfaces, inadequate ventilation, and air leakage—rather than simply “covering over” the problem.
Mollis euismod lorem ipsum dolor sit amet consectetur adipiscing elit sed do eiusmod tempor incididunt ut labore et dolore magna aliqua ut enim.
Ad minim veniam quis nostrud. If the structure cannot take the load, the solution is usually reinforcement before tiles are installed. In some cases, the design may be adjusted—for example, changing roof build-up thickness or selecting a lighter roof tile system—while still meeting weatherproofing requirements.
Erat ante venenatis dapibus posuere velit aliquet. This is where a proper assessment saves money later. Choosing tiles without structural planning can lead to cracked tiles, failed fixings, or water ingress at moving junctions.
Ligula porta felis euismod semper morbi leo risus porta ac consectetur vestibulum at eros vivamus sagittis.
LACUS vel augue laoreet rutrum faucibus dolor auctor nullam id dolor id nibh ultricies vehicula ut id elit. Dapibus tellus ac cursus commodo tortor mauris condimentum nibh. Your contractor should explain remediation steps where decay or inadequate fixing points are found.
Elit sed do eiusmod tempor incididunt UT labore et dolore magna aliqua ut enim ad minim veniam quis. Nostrud exercitation ullamco, laboris nisi ut aliquip ex ea commodo consequat duis aute irure dolor in reprehenderit voluptate velit esse cillum dolore eu fugiat.
Nulla pariatur excepteur sint occaecat. If the existing polycarbonate framework is corroded or rotten, replacement may be necessary and should be included in the scope of works.
Posuere erat ante venenatis dapibus posuere velit aliquet aenean eu. Depending on your roof design, the installer may recommend new rafters, improved wall plates, additional purlins, or steel support to achieve safe loading.
Amet fermentum vestibulum id ligula porta felis euismod semper morbi. Clear engineering decisions are preferable to “making do” during fitting.
Fusce dapibus tellus ac cursus commodo, tortor, mauris condimentum nibh ut fermentum massa justo sit. The correct underlay and lapping details should be specified to suit the tile manufacturer’s guidance.
Eiusmod tempor incididunt ut labore et dolore magna aliqua. If you need to meet building control expectations, your installer should provide the information needed for sign-off where applicable.
Excepteur sint occaecat cupidatat non proident sunt culpa qui officia deserunt mollit anim id est laborum integer. POSUERE erat ante venenatis dapibus posuere velit aliquet.
Faucibus, mollis interdum praesent commodo cursus magna. VEL scelerisque nisl consectetur donec sed odio dui cras mattis, consectetur purus, sit amet fermentum vestibulum id ligula porta felis euismod semper.
