Bringing a Grade I listed roof back — slate, lead and lime.

A sympathetic roof restoration on a Grade I listed property associated with Beatrix Potter — delivered by DLP's heritage team under Listed Building Consent, using traditional materials and methods throughout.

Client [Heritage organisation]
Location Cumbria
Sector Heritage & Listed
Trades Roofing · Joinery · Plastering
Status In progress, 2026
The brief

A roof at the end of its life, on a building that can't take shortcuts.

The property is Grade I listed — the highest level of protection — with a documented association with Beatrix Potter. Decades of weather had taken the roof to the end of its serviceable life: slipped and delaminating slates, failed lead detailing, and water ingress beginning to threaten the historic fabric beneath.

The brief was clear: make the roof sound for the next hundred years, using the materials and methods the building was made with, under Listed Building Consent and with conservation officers involved at every stage.

What we did

Traditional materials, traditional methods — documented throughout.

  • Slate restoration — careful strip and re-lay, salvaging original slates where sound and matching replacements from the same regional source.
  • Lead work — flashings, valleys and detailing renewed in code-appropriate lead, dressed by hand.
  • Lime mortar — bedding and pointing in a lime mix specified for the building, never cement.
  • Timber repairs — our heritage joiners repaired rafters and sarking sympathetically, retaining original timber wherever possible.
  • Making good inside — lime plaster repairs where water ingress had damaged the historic interior.

Every stage was photographed and documented for the conservation officer — the paperwork is part of the job, not an afterthought.

The challenges

Working within the rules — and around the weather.

Grade I consent means nothing is changed without approval: every replacement slate, every lead detail, every mix specification agreed in advance. Add Cumbrian weather and a building that remained in use, and the programme demanded tight sequencing — temporary weathering protecting the fabric at every stage, and a site kept respectful of the property's significance and its visitors.

The outcome

A roof that will outlive all of us.

The restored roof sections are watertight, breathable and visually indistinguishable from the original work — because they're made the same way. The client has a fully documented record of works for the building's file, and DLP remains on site delivering the following phases.

It's the kind of job that shows what a directly employed heritage workforce is for: roofers, joiners and plasterers from one team, working to one standard, accountable to one project manager.

[Client quote — two or three sentences on why they chose DLP and what the result meant for the property.]

[Name], [Role] — [Organisation]
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