THE LEAD LADS® / PROJECT ARCHIVE
New Code 5 lead roof coverings to dormer structures at the Metropole in Whitby, incorporating fully supported sheet leadwork, exposed-edge restraint, movement detailing and carefully formed interfaces within a demanding coastal environment.
WHITBY · NORTH YORKSHIRE · CODE 5 LEAD · COASTAL DORMER
Explore the Project01 — THE PROJECT
This project involved the installation of new lead roof coverings to dormer structures at the Metropole in Whitby, North Yorkshire.
Dormers combine several vulnerable interfaces within a relatively compact area. Roof covering, cheeks, flashings, exposed edges and junctions with the surrounding roof all need to operate as part of one weathering system.
At Whitby, the exposed location also placed particular emphasis on restraint, movement allowance and the quality of the supporting build-up beneath the finished Code 5 leadwork.
LOCATION
PROGRAMME
LEAD CODE
EXPOSURE
02 — THE DORMER
A dormer is effectively a miniature building envelope projecting through a larger roof.
Its leadwork may need to resolve the top covering, perimeter edges, interfaces with the surrounding roof, flashings and the construction immediately around the window structure.
These separate elements cannot be treated independently. Water shedding from the upper surface has to be transferred safely into the surrounding roof covering while the lead itself remains capable of normal movement.
03 — TECHNICAL APPROACH
The visible lead covering is only the outer weathering layer.
Beneath it, the supporting deck and wider roof construction need to provide the geometry, structural support and moisture-management strategy required by the particular dormer build-up.
Once that background is established, the lead can be divided and restrained in a way that accommodates sheet movement without unnecessarily fixing the covering rigidly to the structure.
Code 5 lead was used on this project. Lead selection on other dormers should respond to panel dimensions, geometry, exposure and specification rather than to the word “dormer” alone.
The dormer structure before installation of the renewed lead weathering system.
Preparation of the supporting construction before completion of the new lead covering.
The finished Code 5 dormer covering with controlled perimeter and interface detailing.
04 — COASTAL EXPOSURE
Whitby’s coastal setting places roofing details in a demanding environment where wind-driven rain and exposed edges deserve particular attention.
On a dormer, the perimeter of the lead covering can be more vulnerable than the centre of the sheet because uplift acts directly on exposed terminations.
Continuous copper restraint was therefore incorporated at appropriate edges on this project, securing the lead while maintaining a compatible detail with the sheet covering.
The principle is simple: secure vulnerable edges without converting the entire covering into a rigidly fixed sheet.
05 — MOVEMENT + MOISTURE
Lead needs freedom to respond to temperature change, while the roof construction beneath it also needs an appropriate strategy for moisture and condensation.
Those are related but separate design questions.
The sheet layout, joints, clips and fixings address movement within the leadwork. The construction beneath the covering must separately deal with insulation, vapour control and ventilation where required by the chosen roof build-up.
This project incorporated a ventilated supporting arrangement. Other dormer roofs may require a different build-up depending on their design.
06 — SIGNATURE DETAIL
The edge detail is especially important on an elevated dormer in an exposed location.
The lead covering needs to terminate neatly while remaining secure against wind action.
A continuous copper clip provides restraint at the perimeter without relying on direct fixing through the exposed field of the sheet.
It is a relatively small component, but it demonstrates an important principle of traditional leadwork: restraint should be concentrated where it is needed while the covering remains free to behave as sheet lead.
07 — PREPARATION + SUPPORT
The finished leadwork can only be as accurate as the construction beneath it, particularly around corners, changes of level and exposed edges.
08 — LEADWORK INSTALLATION
09 — MATERIALS
CODE 5 LEAD →
18MM PLYWOOD →
LEAD UNDERLAY →
LEADWORK FIXINGS →
EXPANSION JOINT →
PATINATION OIL →
10 — THE CRAFT
A dormer may be relatively small, but every elevation introduces another transition between materials, angles and weathering planes.
11 — PROJECT RECORD
The Whitby project record shows the dormer before work, the supporting construction during installation and the finished Code 5 lead covering.
Together, the images reveal the relationship between the visible leadwork and the substrate, edge restraint and detailing beneath it.
12 — LEAD DORMERS
Dormer leadwork can include roofs, cheeks, aprons, jambs, flashings, gutters and perimeter details.
That makes the design of the whole assembly more important than any individual sheet.
Sheet dimensions and fixing affect movement. The substrate affects geometry. The roof build-up controls moisture risk, while flashings and perimeter details connect the dormer back into the surrounding roof.
Lead Dormers →
Lead Dormer Detailing Guide →
Leadwork Guides →
Lead Welding Guide →
13 — WHITBY LEADWORK
Whitby gives this project a useful additional layer within the archive.
The same basic leadwork principles still apply, but greater exposure makes the quality of exposed-edge detailing, fixing and interfaces particularly visible in the completed design.
This project therefore connects the local Whitby service page with a real dormer installation rather than relying on location copy alone.
Leadwork Whitby →
Lead Dormer Roofing →
Request a Leadwork Quote →
14 — WHAT THIS PROJECT SHOWS
The Whitby project demonstrates that the centre of a lead sheet is often the simplest part of the roof.
Much of the real detailing happens around its boundaries: perimeter edges, junctions, interfaces, clips and changes in construction.
In an exposed location these areas become particularly important because they have to resist weather while continuing to accommodate normal sheet movement.
The finished performance therefore depends on the relationship between lead, substrate, restraint and the surrounding roof rather than on the lead code alone.
PROJECT TAKEAWAYS
15 — FREQUENTLY ASKED
Code 5 rolled lead sheet was used on this project. The appropriate code for another dormer depends on panel size, geometry, exposure and the wider specification.
Compatible clips can restrain exposed edges and vulnerable parts of the covering while allowing the main sheet to respond to normal thermal movement.
No single build-up applies to every dormer. Ventilation, insulation and vapour-control requirements depend on whether the construction is designed as a ventilated or unventilated roof assembly and on the wider moisture strategy.
A purpose-made movement joint may be incorporated where the sheet layout or dimensions require a controlled break capable of accommodating thermal movement. It is not automatically required on every dormer.
A suitable continuous deck can provide the stable, accurately formed support required by fully supported sheet leadwork.
Patination oil is applied to newly installed lead to help control early surface staining and reduce runoff marking onto adjacent materials while the lead begins to weather.
16 — MATERIALS + RESOURCES
Lead Roofing Project Archive →
Lead Dormers →
Lead Dormer Detailing Guide →
Leadwork Standards →
Code 5 Rolled Lead →
18mm Plywood →
Lead Underlay →
Leadwork Fixings →
Lead Expansion Joint →
Patination Oil →
THE LEAD LADS® / PROJECT ARCHIVE
The Whitby dormer project forms part of The Lead Lads® archive documenting specialist lead roofing across bays, dormers, gutters, canopies, heritage masonry details and architecturally complex roof forms.
Its defining lesson is at the perimeter: successful lead dormer roofing depends not only on the sheet itself, but on support, movement, edge restraint, moisture control and the interfaces connecting the dormer back into the wider roof.
