Dormer Roof Construction & Repairs

Thinking about adding a dormer to your property?
Got a dormer roof that keeps leaking or has been poorly repaired in the past?

At North Lancashire Roofing Company, we specialise in building, replacing, and repairing dormer roofs the right way — with proper workmanship, quality materials, and long-lasting results. No temporary fixes, no shortcuts, and no rushed patch repairs.

We work across South Cumbria, including Kendal, Windermere, Ulverston, Barrow-in-Furness, Grange-over-Sands, Milnthorpe, Kirkby Lonsdale, Sedbergh, and surrounding areas.

New Dormer Roof Construction

We construct all types of dormer roofs, including:

• Flat roof dormers (GRP fibreglass, EPDM rubber, or high-performance felt)
• Pitched tile and slate dormers
• Traditional lead-clad dormers
• Bespoke timber-framed dormers

Every dormer is carefully integrated into the existing roof structure with correct drainage falls, ventilation, insulation, and weatherproof detailing.

Poorly built dormers are one of the most common causes of roof leaks. We make sure your dormer is built to last from the start.

Traditional Lead Dormers

At North Lancashire Roofing Company, we specialise in traditional lead dormer construction using proper timber roll joint methods.

These are genuine rolled lead dormers commonly found on period and high-end properties — not flat lead sheets with decorative trims.

Our lead dormer work includes:

• Timber roll joints formed and fixed correctly
• Lead expertly dressed and bossed over timber rolls
• Correct expansion allowances to prevent splitting
• Code 5 and Code 6 lead installation where required
• Proper welted joints and detailing
• Stepped flashing and abutment work completed to professional standards

Traditional leadwork requires skill and experience. If installed incorrectly, it can crack, split, or fail around the joints. Done properly, it can last for decades.

All leadwork is completed in line with Lead Sheet Association recommendations.

Dormer Roof Replacements

Many older dormers suffer from issues such as:

• Worn or failed felt roofing systems
• Incorrect flashing installation
• Missing soakers
• Rotten timber structures
• Pooling water caused by poor roof falls
• Poor-quality leadwork

Where necessary, we strip the dormer back and rebuild it properly rather than carrying out short-term patch repairs.

Professional Dormer Leadwork

Leadwork is often the weakest point on badly installed dormers.

We install:

• Stepped flashing
• Individual lead soakers
• Apron flashings
• Back gutters
• Code 4, Code 5, and Code 6 lead systems

Correct detailing is essential to keep your dormer fully watertight and protected from future leaks.

Why Choose North Lancashire Roofing Company?

We’re a trusted local roofing company — not a large national firm using unknown subcontractors.

✔ Fully insured
✔ Work completed to BS 5534 standards
✔ Leadwork installed to LSA guidelines
✔ Honest written quotations
✔ Quality workmanship with no shortcuts

Most of our work comes through customer recommendations and repeat business, which reflects the quality of our service.

Get a Free Dormer Roof Quote

Whether you’re planning a loft conversion, replacing an old dormer, or looking for a traditional lead dormer built correctly, North Lancashire Roofing Company is here to help.

Contact us today to arrange a free site visit and no-obligation written quotation.