20/08/2026
Planning a re-roof and torn between natural slate and man made? Here is how the decision actually gets made.
Natural slate is quarried stone, formed in layers and split into thin sheets. Welsh and Cumbrian slates have a long UK track record, and imported Spanish and Brazilian slate is common now too. Because it is stone, colour and thickness vary from piece to piece, and that variation is what many people want on a period property. Well fixed and properly ventilated, a natural slate roof can last a century or more.
Man made slate comes in two families. Fibre cement slates are pressed from cement reinforced with fibres, so they are thin, light and very consistent. Composite slates use resin bound mineral content, often including crushed slate, and mimic a riven surface more closely. Both are factory made, so every piece is the same thickness and very nearly the same colour, with a life of around 50 to 70 years.
Weight usually decides it. A roof structure is designed around the load it carries, and older houses in this area were built for whatever was standard at the time. If your house was slated originally, the rafters were sized for slate. If you want natural slate on a bungalow built for lightweight interlocking tiles, the extra load has to be assessed rather than assumed. Where the structure is marginal, a light man made slate is the sensible answer rather than a compromise.
Worth remembering: a slate roof usually fails at its fixings rather than at the slate. Nail sick roofs on older houses can often be re-slated using the original stone with new nails, battens and underlay.
Over 30 years slating and tiling across Widnes, Runcorn, Warrington, St Helens, Frodsham, Helsby and South Liverpool.
Read more in our blog: https://haltonroofing.uk/natural-slate-or-man-made-slate-how-to-choose-for-a-uk-re-roof/
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Halton Roofing
0151 510 1521 / 07714 495 406
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Quality roof work using the best available Materials fitted to a high Standard ,30 years experience in the Roofing trade.
07714495406 or 0151 510 1521