Slate roofing costs in Devon vary considerably depending on whether the work involves targeted repairs, re-nailing, full re-slating or a complete re-roof. This guide gives honest Devon pricing for each scenario. Free survey. Call 01392 759 295.
Prices are based on typical Devon jobs in 2025. Fixed quotes issued after free survey. All scaffold costs included as line items. No hidden extras.
| Job Type | Typical Cost | What’s Included |
|---|---|---|
| Single slate replacement, accessible pitch | £80–£180 | Labour plus matching reclaimed or new Welsh slate. Price depends on scaffold requirement and matching difficulty. |
| Re-nailing a single failed section (12–20 slates) | £250–£500 | Slates lifted, re-nailed with stainless ring-shank fixings, relaid. Most cost-effective intervention for isolated nail sickness sections. |
| Full re-nailing, standard 3-bed semi (one slope) | £800–£1,800 | Complete re-nail of all slates on one slope where nail sickness is widespread. Includes scaffold for two-storey. |
| Partial re-slate (damaged or failed section, 20–40 slates) | £600–£1,400 | Slates stripped, battens inspected and replaced where required, re-slated with matched Welsh material. |
| Full re-slate, 3-bed Exeter Victorian semi | £8,000–£13,000 | Complete strip, batten replacement, breathable underlay, new or reclaimed Welsh slate on stainless fixings. Conservation area matching included where required. |
| Reclaimed Welsh slate supply premium | +10–20% | Reclaimed Penrhyn or Ffestiniog slate costs 10–20% more than new Chinese slate but is correct for conservation and matching applications. |
| Lime mortar ridge bedding (per m) | £35–£60 per m | Standard on all Devon pre-1900 slate re-roofs. Hydraulic lime (NHL 2 or 3.5) for correct compatibility with period masonry. |
Isolated sections: re-nailing is cost-effective. More than 40% of a slope affected: full re-slate becomes more economical over 10 years.
Conservation area properties require reclaimed slate matched to the original quarry region. Reclaimed material adds 10–20% to material cost but ensures planning compliance.
Where battens are deteriorated (rafter foot moisture damage is common in Devon), replacement adds £800–£2,000 to a full re-slate job depending on the proportion affected.
Single-storey repairs may not require scaffold. Two-storey properties need proper scaffold access. Included in quotes as a fixed line item.
Lime mortar is mandatory on pre-1900 Devon properties. Cement mortar is unacceptable and may trigger conservation officer action on listed buildings.
All prices are guide figures. Fixed quotes are issued after a free survey of the specific job. No call-out fee. No obligation.
📞 Call 01392 759 295 for a Free Survey“Re-nailing on isolated sections. They didn’t push for a full re-slate. Honest, targeted approach.”
“Reclaimed Penrhyn slate matched correctly for our conservation area property. Invisible repair.”
“Full re-slate. Lime mortar throughout, stainless ring-shank fixings. 10-year guarantee. Correct to the last detail.”
Single slate from £80. Re-nail from £250. Full re-slate on a 3-bed: £8,000–£13,000. Free survey. Call 01392 759 295.
Re-nailing is correct when nail sickness is in isolated sections and the slates themselves are sound. When nail sickness is widespread (40%+) or the battens are deteriorated, full re-slating is more economic long-term.
Reclaimed for conservation area matching. New Penrhyn or Blue Bangor for full re-slating where matching is not required. New quarried Welsh slate costs less than reclaimed and provides equivalent performance.
150–200+ years correctly maintained. The slates themselves are essentially indefinite; fixings, battens and mortar require periodic attention.
Yes — lime mortar (NHL 2 or 3.5) is standard on all pre-1900 Devon properties. Cement mortar is not appropriate for period masonry.
Re-nailing a section of 15–20 slates: £250–£500. Full re-slate on a 3-bed: £8,000–£13,000. Re-nailing is appropriate when the slates are sound and nail sickness is localised.
Yes — 10-year workmanship guarantee on all slate work. Call 01392 759 295.
Reclaimed Welsh slate for Devon conservation area re-roofing costs 10–20% more than new quarried Welsh slate for three reasons. First, salvage and sorting costs: reclaimed slate must be sorted by size, thickness and quarry origin before it can be matched to an existing roof. Second, supply constraints: the volume of available reclaimed Penrhyn and Ffestiniog slate from the same era as Devon’s Victorian housing is finite and declining. Third, quality premium: sound reclaimed slate that has already survived 80–120 years in Devon’s climate is a demonstrated product — new quarried slate carries a shorter performance track record on Devon-specific exposure. For conservation area work where material matching is required, reclaimed slate is not an optional premium — it is the correct specification.
Re-nailing is cost-effective when nail sickness is localised in identifiable repair sections where steel nails were used in the 1960s–80s, and the surrounding original copper-nailed sections remain secure. The decision depends on the percentage of the roof plane showing nail failure: under 20%, targeted re-nailing is clearly correct; over 40%, full re-slating becomes more economic over a 10-year horizon as the remaining sections deteriorate progressively. Between 20% and 40%, the correct answer depends on batten condition and the homeowner’s planned tenure. We give an honest written assessment of both options with 5-year and 10-year cost projections at every Devon slate survey.
Welsh slate provides the best long-term performance of any roof covering material in Devon’s climate. The Penrhyn and Ffestiniog quarry regions produce a fine-grained metamorphic rock with negligible water absorption and high freeze-thaw resistance. Devon’s above-average rainfall does not affect the slate itself — only the fixings, battens and mortar. Correctly maintained Welsh slate roofs in Devon routinely exceed 150 years of service, with the slate itself remaining structurally sound while fixings and bedding are renewed periodically. The lifecycle cost of Welsh slate over 100 years is lower than any alternative covering despite its higher initial installation cost.
Free survey across Exeter and Devon. Fixed price quote. No call-out fee. 10-year guarantee.
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