Choosing between roof tiles types means looking beyond colour and profile. Clay, concrete and natural slate can all form durable roofs, but each places different demands on the roof structure and responds differently to weather, installation and maintenance. There is no universally best option: the right choice depends on the tile product, roof design, local exposure and your budget for installation and future repairs. Compare the complete roof system, not just the tiles. Before committing, confirm the roof can carry the load and that the product is suitable for your roof pitch and local conditions.
Tile weight is a structural question, while weather suitability depends on more than the material. Fixings, underlay, roof pitch, flashing details and workmanship all affect how well a tiled roof performs. The table gives a starting point; actual products vary, so ask for the manufacturer’s specifications for the tile you are considering.
| Tile type | Weight and structure | Maintenance considerations | Weather and design fit | Often suits |
|---|---|---|---|---|
| Clay | Usually a substantial roof covering; confirm the complete system load. | Check for cracked, slipped or damaged tiles and keep valleys and gutters clear. Replacement tiles may not match older ones exactly. | Performance depends on the product, pitch, fixings and exposure. Ask about suitability for frost-prone or wind-exposed sites. | Homeowners seeking a traditional appearance and prepared to verify structural capacity. |
| Concrete | Typically a heavy option; the tile profile and product determine the load. | Inspect for breakage, movement and buildup of moss or debris. Surface finishes and colour retention differ by product. | Can suit many roof designs when installed within the product’s pitch and exposure limits. | Projects where a broad choice of profiles and colours is a priority, subject to structural checks. |
| Natural slate | Load varies with slate type, thickness and layout; do not assume it is light. | Look for cracked, slipped or delaminating pieces and failing fixings. Repairs may require a roofer experienced with slate. | Quality and performance vary with the stone and installation. Confirm the slate is suitable for the site’s weather conditions. | Homeowners who value natural variation and can source suitable slate and skilled installation. |
Do not use a general ranking to decide which material is lightest or strongest. Tile dimensions, thickness, profile and fixing method make a difference, and the load of the finished roof includes more than the visible covering. Ask each supplier for the product’s weight per square metre and have a qualified professional assess whether your roof structure is suitable.
Clay tiles are made from fired clay and come in different shapes and finishes, including curved and flatter profiles. Their natural colour and texture can appeal to homeowners seeking a traditional look. The appearance and performance are not identical across products: manufacturing, finish and tile shape affect how a roof looks and how it must be installed.
Clay is not automatically a low-maintenance choice. Individual tiles can crack or move, and repairs may be more noticeable if the replacement tile differs in size, colour or finish from the existing roof. On older roofs, finding a close match can be difficult. Ask a roofer whether suitable replacement tiles are available before choosing a product, particularly if you expect to keep the house for many years.
Weather suitability also needs to be checked for the specific tile. In areas with hard frosts, ask the supplier to confirm that the product is intended for those conditions. For exposed or windy sites, ask how the tiles are to be secured; the weight of a tile alone does not prevent wind damage. Clay can be a good fit when its appearance is important and the product, roof structure and installation details have all been checked.
Concrete tiles are manufactured in a range of profiles, so they can suit different architectural styles. Their appearance depends on the shape and finish selected. Some products have a surface coating, while others use different colour treatments; ask how the chosen finish is expected to age and whether the manufacturer has care instructions.
Concrete is generally a substantial roofing material. If you are replacing a lighter covering with concrete tiles, do not assume the existing framing can support the change. A professional should check the structure and specify any work needed before installation is priced. That assessment can affect the overall project budget, so it belongs early in the planning process.
During routine upkeep, look for broken or displaced tiles, blocked roof drainage and damage around valleys, ridges and penetrations. Moss and other growth can occur where conditions are damp or shaded, regardless of the tile material. Avoid walking on the roof or using aggressive cleaning methods without advice: tiles can be damaged by foot traffic, and cleaning can affect their surface. Follow the product guidance and use a roofer for work at height or repairs you cannot safely carry out.
Natural slate is cut from stone, so colour, texture and other visual characteristics can vary. That variation is part of its appeal, but it also means you should inspect samples in person where possible and confirm that the slate supplied for the project is suitable for roofing. Different slates can vary in quality and weather performance; the word “slate” by itself is not a guarantee of a particular lifespan or level of durability.
Slate’s weight depends on the type of stone, the thickness and the roof layout. Obtain the product information and arrange a structural assessment rather than judging the load from appearance. Installation also calls for appropriate skills and compatible fixings. A slate roof may be difficult to repair neatly if the original material is no longer available, so ask about sourcing replacement pieces and the roofer’s experience with slate before accepting a quote.
Inspect slate roofs for cracked, slipped or split pieces and for problems with fixings and flashing. A damaged slate may not be obvious from the ground, and walking on the roof can cause further breakage. A professional inspection is the safer option when damage is suspected, after severe weather or before buying a home with an older slate roof.
No tile material is suitable for every site simply because it is heavy or widely used. A roof in a sheltered location faces different demands from one exposed to strong winds, salt spray, driving rain or severe temperature changes. In New Zealand, conditions vary by location and elevation, so base the decision on the actual site rather than a broad regional label.
Ask the roofer to confirm the minimum roof pitch for the specific product and explain how the proposed underlay, battens, fixings and flashings work together. If the design is unusual or the roof has a complicated shape, seek a product-specific installation plan rather than relying on a general recommendation.
A material change can create structural work that is easy to overlook when comparing tile prices. The existing roof may have been designed for a different covering, and the visible condition of the framing does not by itself establish its capacity. Ask for an assessment before finalising your material choice, especially if the new system will be heavier than the one being removed.
Request the weight per square metre for the proposed tiles and clarify whether the figure covers only the tiles or the full roofing assembly. The completed system may also include battens, underlay and other components. Have the person assessing the structure consider the roof’s condition and design, not just a single product specification.
Do not assume that laying new tiles over an existing roof is an acceptable shortcut. Whether any overlay is appropriate depends on the roof design, condition, product instructions and local requirements. Have the contractor explain the proposed method, how the structure will be checked, and whether approvals need to be confirmed with the relevant local council.
The total cost of a tiled roof includes more than the material. Quotes can differ because of removal and disposal, structural work, underlay, battens, flashing, access, labour and the complexity of the roof. Slate may involve specialist supply or installation, while clay and concrete costs also vary by product and project. Get written, itemised quotes so you can compare the same scope of work.
Maintenance costs are difficult to predict without knowing the product, installation quality, site exposure and roof condition. For all three materials, budget time and money for periodic inspections and prompt repairs. Ask how easily damaged tiles can be replaced, whether matching stock is available and what care the manufacturer recommends. A low initial quote may not be the best value if it excludes essential structural or roof-system work.
When reviewing a quote, check that it states the exact tile product and includes the supporting components, removal work, flashing details and any proposed repairs to the roof structure. Ask who is responsible for arranging any structural assessment and whether the quoted price changes if hidden damage is found. Confirm that the contractor has experience installing the material you choose.
Clay can suit a homeowner who values a traditional finish and has confirmed the structure and product specifications. Concrete offers a wide choice of profiles, but its substantial load makes a structural check important. Natural slate may be the right option when its distinctive appearance is worth the need to source suitable stone and use an installer familiar with slate.
Before deciding, compare samples, obtain written product information and have the existing roof assessed. Choose the material that fits the home, site exposure and available budget for both installation and upkeep—not simply the one that looks best in a catalogue.
They are generally substantial roof coverings, but the actual load depends on the product, tile dimensions, thickness and installation system. Ask for the specified weight per square metre and have the roof structure assessed before changing materials.
There is no reliable answer based on material alone. Installation quality, roof design, shade, exposure and the availability of matching replacement tiles all affect maintenance needs. Compare the care instructions for specific products and plan to inspect the roof periodically.
Possibly, but the existing structure must be checked for the proposed load before work begins. A professional assessment may identify reinforcement or other work that affects the project scope and cost.
They can be suitable if the product and installation system are designed for the site’s conditions. Confirm the fixing details with the roofing contractor, and check that flashings and other metal components are appropriate for coastal exposure where relevant.
Often, individual damaged tiles can be replaced, but access, the roof system and the availability of a compatible tile matter. A roofer can check for related damage and advise whether a repair will match the existing roof.
