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Alex Shepherd Roofing
Roofing service

Roof slating and slate roof repairs

Most of the housing round here is under slate, and there are two very different kinds of it. Getting them mixed up is how roofs get ruined.

Welsh blue slate covers most of the Victorian terraces across Nelson, Colne, Burnley and Barnoldswick. Thin, light, uniform, and laid in even courses. A good blue slate roof will run well past a hundred years.

Yorkshire stone slate is what you find on older and higher property, and over into Craven around Skipton. It is sandstone, not slate at all, laid in diminishing courses with the biggest at the eaves. It is heavy, and that weight changes everything about how the roof has to be built underneath.

Covering
East Lancashire & Craven
Quotes
Free, no pressure
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07840 031508

What we do

  • Replacing individual slipped, cracked or missing slates
  • Patch re-slating where one area has failed
  • Full strip and re-slate, in reclaimed or new slate
  • Re-slating in salvaged stone slate, including sorting and re-sizing
  • New battens, breathable membrane and re-fixing
  • Ridge, hip and verge work
  • Valleys and abutment detailing in lead

Why slate roofs fail

Slate itself lasts a very long time. What fails is everything around it.

Nail fatigue
The slates are sound but the nails have rusted through, so slates start slipping one at a time for no obvious reason. Once it starts in earnest across a roof, patching becomes a losing battle.
Battens
A hundred years of damp and the timber the slates are nailed to gives up.
Previous repairs
Cement fillets, mortar smeared into valleys, and mastic where lead should be. All of it traps water rather than shedding it.
Torching
Older roofs were lined underneath with lime mortar and hair. When it crumbles you get draughts, dust and water getting past.

Stone slate has one more: the roof structure was built for that weight when it was green and the rafters were strong. If somebody has replaced stone slate with something else, or the timbers have moved, the whole thing needs looking at structurally, not just re-covering.

Repair or re-slate?

The honest test is nail fatigue. If we lift a few slates and the nails come away as rust, the roof is telling you it is near the end regardless of how good the slates look. If the nails are sound and the battens are firm, repair it and leave it alone.

We will lift slates and show you, rather than asking you to take our word for it.

What slating costs

Reclaimed versus new
Reclaimed Welsh slate matches an existing roof and costs more. New slate is cheaper and can look wrong next to weathered slate.
Stone slate is the expensive one
It is heavy, slow to lay, and salvaged stone has to be sorted and graded by size.
Access and scaffold
A full re-slate needs a scaffold, and that is a significant line on the quote.
What is found underneath
Battens and any rotten timber at the eaves.
Common questions

The things people ask us

Usually on Welsh blue slate. Stone slate is harder and depends what is available salvaged. We will tell you before you commit whether the patch will show.

Yes. A breathable membrane under new battens is standard now and worth doing whenever a roof comes off. It is the cheapest part of the job and the one you cannot add later.

Reviews

What people said about the work

Read the reviews, then ring us and see if we match up.

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