Clay Tiles vs Concrete Tiles: Which Is Right for Your Oxford Home?

Oxford’s Two Main Tile Types

Across Oxford’s housing stock, two tile types dominate:

• Clay plain tiles — the traditional tile of Oxford’s Victorian, Edwardian and 1930s properties. Hand-made or machine-made, flat profile, double-lapped, fired red-brown to buff. Dominant in Jericho, North Oxford, Headington and older parts of Cowley and Marston.
• Concrete interlocking tiles — the modern replacement. Single-lapped, profiled, heavier, and standard on post-war estates across Cowley, Barton, Blackbird Leys, Risinghurst and the outer suburbs. Also used widely across Bicester, Didcot, Abingdon and Carterton.

Welsh slate is a third significant material in Oxford — dominant on late-Victorian and Edwardian North Oxford villas — but the clay vs concrete decision doesn’t apply to slate properties, which we cover in our slate roofing guide.

Clay Plain Tiles: The Case For

Clay plain tiles are the original roofing material for Oxford’s Victorian and Edwardian housing. They have several genuine advantages that explain why they’re still specified on period properties and conservation area replacements:

BS 5534 specifies that all roof tiles on new and replacement roofs must be mechanically fixed, a standard applying equally to clay and concrete tile across Oxford. — Source: British Standard BS 5534

• Longevity. Well-maintained clay plain tiles last 80–150 years. Original clay tiles from the 1880s and 1890s are still performing correctly on properties across Jericho, Holywell Street and the North Oxford avenues. The fixings fail before the tiles.
• Weight advantage. Clay plain tiles are lighter per m2 than concrete interlocking tiles. This matters on older roof structures where adding the weight of concrete tiles could stress the original timber.
• Aesthetic. The double-lapped profile and natural fired surface of clay plain tiles produces the rippled, characterful roofscape that defines Oxford’s older streets. This is a genuine visual difference that matters in conservation areas and on period properties.
• Conservation compliance. In Oxford’s conservation areas — which cover much of the city centre, North Oxford and Jericho — replacing clay tiles with concrete is typically refused. The planning guidance requires like-for-like in colour, profile and surface texture.

Clay Plain Tiles: The Case Against

Clay plain tiles are not the right choice in every situation:

• Cost. Clay plain tiles cost £45–£80 per m2 versus £18–£35 for concrete interlocking. On a full re-roof of a 3-bed semi, this difference can be £3,000–£5,000 in materials alone.
• Sourcing and matching. Matching existing clay tiles for repairs requires finding the right size, camber and colour grade. This is achievable but takes more effort than ordering standard concrete tiles from a builders’ merchant.
• Minimum pitch requirement. Clay plain tiles require a steeper minimum pitch than most concrete interlocking tiles — typically 35 degrees minimum. Properties with shallower pitches need concrete or an alternative material.

Concrete Interlocking Tiles: The Case For

For the majority of Oxford’s post-war housing stock, concrete interlocking tiles are the practical, cost-effective choice:

• Cost. Significantly cheaper than clay in both material cost and installation time. The interlocking profile means fewer tiles per m2 and faster laying.
• Lower pitch capability. Many concrete interlocking tiles can be installed at 17.5–22.5 degrees. This covers the shallower pitches common on 1960s and 1970s Oxford estates.
• Widely available. Standard concrete interlocking tiles are available from any builders’ merchant, making replacements and repairs straightforward.
• Performance lifespan. Quality concrete tiles last 40–60 years, which is more than sufficient for most homeowners’ purposes.

Concrete Interlocking Tiles: The Case Against

• Weight. Heavier than clay per m2. On older properties, adding concrete tiles means the rafter and batten structure should be assessed as capable of taking the load.
• Surface erosion. Concrete tiles erode gradually over time, losing surface texture and becoming porous. After 40–50 years, moss retention and colour fade are visible. Clay tiles do not suffer this degradation.
• Conservation areas. Concrete tiles are typically not acceptable in Oxford’s conservation areas on properties that originally had clay tiles or slate.
• Aesthetics on period properties. Concrete interlocking tiles on a Victorian or Edwardian Oxford property look wrong. The profile, the colour uniformity and the surface texture don’t match the character of the building.

Which Should You Choose?

The answer is almost always determined by the era and location of your property rather than personal preference:

• Victorian or Edwardian property (Jericho, North Oxford, old Headington, Marston): Clay plain tiles. Conservation area requirements will specify this on many streets, and it’s the right material for the building regardless.
• 1930s semi-detached (Summertown, Cowley, Rose Hill, Kidlington): Clay plain tiles if budget allows and the pitch is suitable. Concrete interlocking is acceptable and more cost-effective if the existing tile was concrete.
• Post-war estate property (Barton, Blackbird Leys, Risinghurst, Didcot, Bicester): Concrete interlocking. These properties were built for concrete tiles, the roof geometry is designed for them, and the cost saving is substantial.
• Conservation area — any era: Clay plain tiles or approved alternative. We check requirements for your specific address on the survey.

Further reading: Roof Tiling Oxford · Slate Roofing Oxford · Full Roof Replacement Oxford