A Comprehensive Guide to Using Lead Flashing for Roofing

What is Lead Flashing?

Lead flashing is a malleable, durable material traditionally used in roofing to seal joints and prevent water penetration. It is typically installed where the roof meets vertical structures such as chimneys, walls, and dormers. The flexibility and longevity of lead make it an ideal choice for these critical areas.

Benefits of Using Lead Flashing

1. Durability: Lead is one of the most durable materials for flashing, often lasting over 100 years.
2. Malleability: It can be easily shaped to fit various roof structures and profiles.
3. Corrosion Resistance: Lead resists corrosion, ensuring it remains effective in harsh weather conditions.
4. Environmental Sustainability: Lead flashing is recyclable, making it an environmentally friendly choice.

Types of Lead Flashing

Lead flashing comes in various codes, which refer to the thickness of the lead. For most roofing applications, Code 4 lead flashing is a popular choice due to its balance of flexibility and strength.

Code 4 Lead Flashing Specifications:

• Thickness: 1.8mm
• Weight: 20.41kg/m²
• Common Widths: 150mm to 600mm

Common Applications of Lead Flashing

1. Chimney Flashing: Installed around the base of chimneys to seal gaps.
2. Step Flashing: Used where the roof meets a vertical wall.
3. Valley Flashing: Placed in roof valleys to channel water off the roof.
4. Dormer Flashing: Seals the edges where dormers meet the roof.
5. Apron Flashing: Used at the junction between a vertical wall and a sloping roof.

Tools and Materials Needed

• Code 4 lead flashing roll
• Lead dressers
• Lead soakers
• Lead sealant
• Fixing clips
• Galvanised nails
• Soft brush

Step-by-Step Installation Guide

1. Preparation:

• Ensure the roof surface is clean and dry.
• Measure and cut the lead flashing to the required size.

2. Installing Lead Soakers:

• Place lead soakers between each tile and against the wall or chimney.
• These help in directing water away from the joint.

3. Applying the Lead Flashing:

• Position the lead flashing over the soakers and up against the vertical surface.
• Secure the lead flashing using fixing clips and galvanised nails, ensuring it is tightly fixed but allowing for thermal movement.

4. Dressing the Lead:

• Use lead dressers to shape and mould the lead flashing to fit the contours of the roof and vertical surfaces.
• Smooth out any wrinkles to create a neat finish.

5. Sealing the Joints:

• Apply lead sealant to all joints to ensure a watertight seal.
• This is particularly important at overlaps and where the flashing meets the wall or chimney.

6. Finishing Touches:

• Brush off any debris and check for any gaps or loose areas.
• Ensure the flashing is securely fixed and sealed to prevent water ingress.

Maintenance Tips

• Regular Inspections: Check the lead flashing annually for signs of damage or wear.
• Cleaning: Keep the flashing free of debris, which can cause water to pool and increase the risk of leaks.
• Repairs: Address any minor issues promptly to prevent them from becoming major problems.

Conclusion

Properly installed lead flashing is essential for maintaining the integrity of your roof. Its durability and flexibility make it an ideal choice for sealing roof joints and preventing water ingress. By following the steps outlined in this guide, you can ensure a professional, long-lasting installation.

For those looking to purchase high-quality lead flashing, we recommend the Lead Code 4 300mm 12-inch 3m 18.5kg Roofing Lead Flashing Roll from Tradestore Online. This product offers excellent performance and reliability for all your roofing needs. Visit Tradestore Online to place your order today and ensure your roof is protected against the elements for years to come.