Wessex Interlocking Tile

Large format, low pitch solution with a subtle square profile

    • Low pitch solution
    • Designed to shed water efficiently
    • Can achieve an A+ rating in the BRE Green Guide to Specification
    • Accredited to the BES 6001 standard for responsible sourcing


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  • Smooth Brown
  • Smooth Grey
Blue Black
Size of Tile

420mm x 330mm

Minimum Pitch


Maximum Pitch


Minimum Headlap


Maximum Gauge


Cover Width

298mm (nominal)

Covering Capacity 9.7 tiles/m2 at 75mm headlap
10.4 tiles/m2 at 100mm headlap
Weight of Tiling 50 kg/m2 (0.49kN/m2) at 75mm headlap
53 kg/m2 (0.52kN/m2) at 100mm headlap
Battens Required 2.9 lin.m/m2 at 75mm headlap
3.1 lin.m/m2 at 100mm headlap
Batten Size Recommended 38 x 25mm for rafters/supports not exceeding 450mm centres
50 x 25mm for rafters/supports not exceeding 600mm centres
Notes The effectiveness of the tile or slate to operate at the minimum recommended pitch and lap may be influenced by special circumstances. Guidance on pitch and lap should be obtained from the Technical Advisory Service for the following:
• Interlocking tiles and slates where the roof slope exceeds 6 metres in length and/or the site is rated to be in a severe exposure category.
• Double-lap fibre cement slates where the roof slope exceeds 6 metres in length (severe/very severe exposure) and 9 metres in length (sheltered/moderate exposure).

Nominal weight of roof tile fittings
Country of Production


Environmental Management


Quality Management


Health and Safety Management


LCA study

'A' rated by BRE


Cured under conditions of elevated temperatures

Raw materials

Sand, concrete, pigments, paints, recycled aggregate and binders


> 60 years


Can be crushed and used as aggregate and/or as an inert bulk fill

Embodied Carbon Rates
Measurement metric No per sq m  Headlap / gauge M₂ conversion
KgCO₂e 9.7  75  11.64
KgCO₂e  10.4  100  12.48

Designed to shed water efficiently at pitches down to 15° the Wessex interlocking tile has clean, simple lines with a pleasing minimalist style.

All of our concrete interlocking tiles can achieve an 'A+' rating (the lowest environmental impact) in the Building Research Establishment's Green Guide to Specification (* element ref: 812410007, 812410018, 812410049).

Accreditation to the BES 6001 framework standard for 'Responsible Sourcing' means that projects using our concrete tiles can now achieve extra credits under BREEAM and The Code for Sustainable Homes. Click here to find out more.

*Please note* The British Standard for Slating and Tiling (BS 5534) has recently been updated, making significant changes to tile fixing requirements. To ensure that your roof is compliant to the new standard, our fixing specification service is available and can be accessed by clicking here


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Here at Marley Eternit, we are always on hand to offer practical and experienced support. Whether you have a query, are unable to find what you are looking for or would like to report an issue, drop your details below and we will be in touch.
Please note: we are unable to accept sample requests through this form.