Clay tiles last 80–100+ years, keep their colour and suit period Warwickshire properties; concrete tiles cost less, last 40–60 years but fade and are heavier. For Victorian and conservation homes, clay is correct and often required. For post-war estates, concrete interlocking is the practical choice. Both are widely used locally.
The choice between clay and concrete roof tiles is one of the most common questions we answer on surveys across Stratford, Warwick and Leamington Spa. Both materials work. The right choice depends on your property type, its location, your budget and — for some Warwickshire properties — your planning obligations. This guide covers the practical differences from 20 years of fitting both across the county.
Clay tiles are formed from natural clay, extruded or hand-pressed, and fired at high temperature. The manufacturing process creates a surface that is dense, relatively non-porous and chemically stable. Modern clay tiles are pressed from dense clay bodies and fired to vitrification point, making the material essentially impermeable.
Concrete tiles are made from sand, cement and water, pressed under high pressure and cured. They begin as a relatively porous material with a surface treatment — a sand coating or paint finish — that gradually weathers away over the first 15 to 20 years of the roof's life. Once this surface layer has eroded, the underlying concrete becomes more susceptible to frost damage and moss colonisation.
BS 5534, the code of practice for slating and tiling, governs the fixing and specification of both clay and concrete tiles, including the wind-uplift calculations that determine fixing pattern in exposed Warwickshire locations.
— BS 5534: Code of practice for slating and tiling
| Factor | Clay Tiles | Concrete Tiles |
|---|---|---|
| Design life | 50–100 years | 25–40 years |
| Avon Valley moisture | Unaffected | Surface degrades faster |
| Frost resistance | High (vitrified surface) | Moderate (after surface wear) |
| Moss susceptibility | Lower after 20 years | Higher after surface wear |
| Colour retention | Natural colour permanent | Fades over 15–20 years |
| Weight | Heavier | Lighter |
In Warwickshire conditions specifically, clay tiles outperform their design life specification consistently. Victorian clay plain tile roofs on Stratford's Evesham Road and Shipston Road have been in service for 120 to 140 years. Concrete interlocking tiles from the 1960s and 1970s — of which there are thousands of properties across Bridgetown, Clopton, Wellesbourne and the Leamington Spa estate areas — are now reaching the end of their effective service life. This is not a criticism of concrete tile; it is a fact of the material's design specification.
For a standard three-bed semi-detached re-roof in Stratford-upon-Avon in 2025:
| Material | Approx. material cost per m² | Re-roof price (3-bed semi) |
|---|---|---|
| Concrete interlocking | £18–£28 | £5,500–£7,500 |
| Clay interlocking | £28–£45 | £6,500–£9,000 |
| Clay plain tile | £35–£55 | £7,500–£11,000 |
| Natural Welsh slate | £45–£70 | £8,500–£13,000 |
| Conservation clay (matched) | £60–£120 | £10,000–£18,000 |
The lifetime cost calculation changes the picture significantly. A concrete tile re-roof lasting 30 years will need replacing once in 60 years. A clay tile re-roof lasting 70 years will not. For a homeowner planning to stay in their property, clay typically represents better long-term value for all but the tightest budgets.
This is the question that closes the debate for many Stratford homeowners. Properties within Stratford-on-Avon's conservation areas — principally the Old Town Conservation Area and its immediate approaches — are required to use materials consistent with the character of the area. For most visible elevations in these zones, this means clay plain tile or natural Welsh slate. Concrete tile is not acceptable for re-roofing in the Old Town conservation area, regardless of cost preference.
Properties outside the conservation area but within the Stratford-on-Avon District have no material requirement beyond the standard planning conditions, and the choice between clay and concrete is entirely one of budget, preference and the property's own character.
For Stratford estate properties on Bridgetown, Clopton, Bishopton and the Alcester Road fringe: modern clay interlocking is the best value replacement for your ageing concrete tiles. The 15 to 20% premium over concrete is well justified by the additional design life and the retention of the property's appearance over the medium term.
For Victorian and Edwardian properties in Stratford town: clay plain tile or Welsh slate is the correct material and typically the conservation requirement. We carry supplier contacts for conservation-grade matched profiles across the CV37 postcode.
For conservation area properties in the Old Town: clay plain tile from a matched source is the only acceptable specification. We advise on this at every Old Town survey.
We survey, assess and recommend. Call 01789 509542 for a free no-obligation survey across Stratford-upon-Avon and Warwickshire.
Call Now: 01789 509542No. Stratford-on-Avon's conservation area designation requires materials consistent with the character of the area on visible elevations. Clay plain tile is the required material for most Old Town properties. If you are uncertain whether your property falls within the conservation area boundary, contact Stratford-on-Avon District Council or we can advise at the free survey.
The 1960s and 1970s concrete interlocking tiles on Bridgetown and Clopton estate properties have a design life of 25 to 40 years. Most of these tiles are now 45 to 60 years old, which is why nail sickness is widespread across these estates. A free survey will confirm the extent of any nail sickness on your specific property.
For Victorian properties in Stratford, the original covering was clay plain tile or Welsh slate, and these remain the appropriate and often conservation-required materials for visible re-roofing work. Modern clay interlocking tiles are an acceptable alternative on non-conservation properties where the budget does not extend to clay plain tile.
The Avon Valley moisture environment affects concrete tiles significantly more than clay. Concrete tile surface treatments erode faster in persistently damp conditions, increasing moss susceptibility and surface degradation. Clay tiles are essentially unaffected by ambient moisture. This is an additional reason to choose clay for Stratford properties, particularly those within 400 metres of the river.
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