Project imagery
Project Duration
This small window dormer project was completed as part of a specialist lead roofing package.
Project Detail
Small lead-covered dormer window with traditional lead cheeks, roof covering and flashings.
Leadwork Services
The Lead Lads provide specialist leadwork services for dormers, bays, flashings, gutters and roof details.
Leadwork Project Details | The Lead Lads ®
The Property
Small Lead Window Dormer Roof Covering
This project involved the installation of leadwork to a small window dormer. Smaller dormers are often compact, but they still require careful detailing because they include multiple vulnerable junctions around the roof covering, cheeks, front apron, window frame and adjoining roof slope.
Lead is particularly well suited to small dormer windows because it can be formed neatly around complex shapes, dressed into tight junctions and detailed to provide long-lasting weather protection.
The aim of this project was to provide a durable and traditional lead dormer finish using suitable materials, correct substrate preparation and recognised leadworking techniques.
Why Small Dormers Require Specialist Leadwork
Small dormers can be deceptively complex. Although the roof area is limited, the number of corners, abutments, flashings and edge details means the workmanship must be accurate.
Poor detailing around a dormer window can quickly lead to water ingress, staining, timber decay and damage to the roof structure. Correct leadwork helps protect the dormer while maintaining a traditional appearance.
Leadwork Standards and Technical Approach
This dormer was detailed using recognised leadwork principles, with careful attention to fixing, weathering, movement and neat integration with the surrounding roof.
- BS 6915 informed the installation of the fully supported lead sheet covering.
- BS EN 12588 governed the rolled lead sheet material specification.
- Lead Sheet Association guidance informed fixing, laps, flashings, welted edges and general detailing.
The key principle was to provide weather protection while allowing the lead to move naturally. This required suitable support, correct underlay, appropriate clips and carefully formed flashings.
Contact us about leadwork More leadwork resources and guides The leadwork LinkSpecification of Works
Preparation and Removal
- Safe access established to the dormer window area.
- Existing defective coverings and flashings removed where required.
- Dormer roof, cheeks and adjoining roof junctions inspected.
- Window abutments and surrounding roof coverings checked.
- Area prepared for new substrate, underlay and leadwork installation.
Substrate and Support
- New exterior-grade plywood installed where required to provide a sound base.
- Building paper / lead underlay installed beneath the lead covering.
- Cheeks, front apron and roof areas prepared for new lead weathering.
- Perimeter details prepared to suit flashings, clips and weathering laps.
Leadwork Installation
- New lead covering formed to the dormer roof area.
- Lead cheeks dressed to suit the dormer sides.
- Front apron formed to protect the dormer face and window junction.
- Welted edges formed where required for strength and appearance.
- Lead flashings integrated into adjoining roof coverings.
- Clips and suitable non-ferrous fixings installed to secure exposed edges.
- Corners bossed, dressed or welded where required.
- Completed detail checked for laps, cover and weathering continuity.
Finishing and Protection
- Patination oil applied to exposed leadwork immediately after installation.
- Flashings, cheeks, roof covering and edge details inspected.
- Completed dormer checked for finish quality and weathering performance.
The Materials
- Rolled lead sheet
- Exterior-grade plywood
- Building paper / lead underlay
- Copper clips and non-ferrous fixings
- Patination oil
Skills Required
- lead dressing
- lead bossing
- lead welding
- dormer cheek detailing
- lead flashing installation
What This Project Teaches About Small Lead Dormers
Small dormers require careful leadwork because their compact size often includes several junctions in a small area. Cheeks, front aprons, flashings and window abutments all need to be detailed correctly to prevent water ingress.
This project shows why traditional leadwork remains an effective solution for dormer windows. Lead can be shaped, dressed and formed neatly around complex geometry while providing durable weather protection.
Property Owner Takeaways
- Small dormers still require specialist lead detailing.
- Lead cheeks and aprons help protect vulnerable window junctions.
- Correct underlay and substrate preparation improve long-term performance.
- Neat flashings are essential where the dormer meets the main roof.
Related Lead Lads Resources
- Lead roofing projects
- Leadwork standards hub
- Leadwork services
- Shoppable lead chart
- Lead roll
- Leadwork fixings
Frequently Asked Questions
Can lead be used on small dormer windows?
Yes. Lead is ideal for small dormers because it can be formed around tight details and complex junctions.
What parts of a dormer can be covered in lead?
Lead can be used to cover the dormer roof, cheeks, apron, flashings and surrounding weathering details.
Why do small dormers leak?
Leaks are often caused by failed flashings, poor detailing around window junctions or defective side cheek coverings.
Does a small dormer need underlay beneath the lead?
Yes. Suitable underlay helps separate the lead from the substrate and reduces abrasion.
Why are clips used with leadwork?
Clips secure exposed edges while still allowing the lead to move naturally.
How long should lead dormer details last?
When installed correctly to recognised standards, lead dormer details can provide many decades of reliable service.
