Lead Roof Flashing Slate Tiled Pitch 25°-35° for 125mm (5″) Twin Wall Stove Pipe
Ensure a secure, weatherproof roof penetration with our premium Lead Slate Flashing, designed for use with Twin Wall insulated flue systems. This high-quality flashing creates a durable, watertight seal where a flue pipe passes through your roof surface — preventing leaks and protecting against the elements.
£84.01
At Custom Lead, we produce high-quality cast lead products that combine traditional craftsmanship with sustainable materials. Every order is checked for weight accuracy, finish, and purity before dispatch.
Shipping & Packaging:
• Fast UK dispatch (1–2 working days)
• Secure, reinforced packaging for heavy materials
• Tracked courier delivery
• Bulk or trade orders available on request
More Info
Lead Slate Flashing (25–35° Pitch) – For 125mm Twin Wall Flue
Ensure a secure, weatherproof roof penetration with our premium Lead Slate Flashing, designed for use with Twin Wall insulated flue systems. This high-quality flashing creates a durable, watertight seal where a flue pipe passes through your roof surface — preventing leaks and protecting against the elements.
Manufactured from 1.8mm Code 4 lead, this flashing conforms to BS EN 12588 standards, providing excellent flexibility and longevity. It’s suitable for a range of roof types and ensures a professional finish on every installation.
Product Specifications:
- Suitable for: Tiled and slate roofs
- Base size: 450mm × 450mm
- Compatible pipe (external): 175mm
- For flue internal diameter: 125mm (5″)
- Roof pitch: 25–35°
- Maximum temperature: 260°C
- Lead thickness: 1.8mm
✔ Free UK Delivery Included
Ideal for both new installations and replacements, this lead slate flashing combines durability with traditional craftsmanship for a long-lasting, watertight seal.


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