What is a roof flashing?

Roof flashing plays a crucial role in your roofing system, acting as a barrier to keep water from seeping in and causing leaks. This protective material normally made is strategically placed around the joints, edges, and any openings in your roof, ensuring that water is directed away from the most vulnerable spots. In simple terms, it fills in the gaps where different parts of the roof come together or where structures like chimneys and vents are located.

Lead flashing is a highly adaptable and long-lasting material commonly used for roof flashings. It’s well-regarded for its flexibility, durability, and outstanding waterproofing capabilities.

Let’s break down the main types of lead flashing and their uses:

• Step flashing is what you’ll find where a roof meets a vertical surface, like a wall or chimney.
• Counter flashing works alongside step flashing to create an even tighter seal at the roof-wall junction, making sure water stays out.
• Apron flashing is placed at the bottom edge of a wall or chimney where it meets the roof. Its main job is to guide water away from the roof and into the gutter system.
• Chimney flashing is specifically designed to seal the area where a chimney connects with the roof.
• Valley flashing comes into play where two roof slopes meet at an internal angle, creating a “valley” that can collect rainwater and help it flow down.
• Finally, ridge flashing is used along the peak of the roof, where those two slopes come together.

What Materials Are Used for Roof Flashing?

• Lead
• Aluminium
• Copper
• Zinc
• Steel

Do Roofers Still Use Flashing?

Absolutely, roofers still rely on flashing, and it’s a key component of today’s roofing systems. Flashing plays a vital role in stopping water leaks and safeguarding the roof from potential water damage.

In the UK, waterproofing is a vital aspect of safeguarding roofs against the often damp and unpredictable weather. While traditional techniques like lead flashing and bitumen felt are still widely used, there’s been a noticeable shift towards newer and alternative waterproofing solutions.

Liquid waterproofing systems are applied as liquid coatings that harden into a seamless membrane.

EPDM, a synthetic rubber membrane, is a choice for flat or low-slope roofs across the UK. It boasts impressive resistance to UV damage, ozone, and extreme temperatures.

TPO, on the other hand, is a single-ply roofing membrane crafted from a mix of polypropylene and ethylene-propylene rubber. Its popularity is on the rise for both residential and commercial roofs in the UK.

Getting roof flashing’s installed correctly is essential for ensuring your roofing system lasts a long time.

Can You Repair Roof Flashing, or Does It Need Replacing?

Minor cracks or tears can be repairs with the correct welding equipment or for temporary repairs sealant or tape can be used.

If the flashing is really damaged, bent out of shape, or has big holes or cracks, it’s probably time for a replacement.

If you’re not quite sure whether your flashing needs a repair or a full replacement, it’s definitely wise to reach out to a professional roofer for advice.

Conclusion

Roof flashing is a crucial part of any roofing system, yet it often flies under the radar. Its primary job is to seal and safeguard the joints and intersections on a roof—those spots that are most at risk for water leaks. If flashing isn’t installed correctly, your home could face serious issues like leaks, mould, rot, and expensive structural damage.