When it comes to protecting your roof from the rain, sun, hail, and wind, there are few things as important as flashing. And it can come in a huge variety of materials, one of which is lead.
Understandably, the word 'lead' might raise alarm bells, but read on to find out what lead flashing is, why it's used on roofs, and whether it's safe.
What Is Lead Flashing?
What exactly is lead flashing? Simply put, it's a thin sheet of metal – traditionally made from lead – that seals joints and gaps in your roof, keeping water outside your home. Typically, flashing is used around chimneys, skylights, and walls – vulnerable parts of your roof that, without properly installed flashing, could form leaks.
Why Is Lead Used on Roofs?
Lead was once used far and wide amid the construction industry. But today, we all recognise this material for the poisonous metal it is. So, why lead? This humble metal has been a favourite in roofing for centuries. It's incredibly malleable, which is vital for flashing to work effectively, sealing irregular shapes and protrusions on your roof.
Lead is also highly durable. It doesn't rust or break down over time and can live a long life on your roof.
Is Lead Flashing Made From Lead?
Traditional lead flashing is, unsurprisingly, made from lead. However, modern alternatives can be a blend of lead and other metals.
While lead is a toxic material, it's completely safe when on your roof, where you can't touch it or breathe it in. Its continued use is a testament to its effectiveness as flashing.
3 Pros of Using Lead Flashing
Lead flashing has long been used on roofs and in construction. Is it safe? Is it worth it? Here are the benefits of using lead flashing on your roof.
1. Durability
Lead flashing is highly durable and long-lasting. It's not unusual for well-maintained lead flashing to last over a century. Whether your home is hit by heavy rain, hail, winds, or bright sun, lead flashing is known to withstand extremes.
2. Flexibility
Roofs are rarely flat and simple. They're full of turns and awkward angles. Fortunately, lead is incredibly malleable. Whether it's wrapping around a chimney or sealing a skylight, lead is able to bend and mould to fit irregular shapes.
3. Weatherproofing and Insulation
Not only does lead flashing keep water out, but it also adds insulation to your roof. By sealing gaps tightly, it helps regulate internal temperatures in your home. Sealing your home from drafts can prevent your energy bills from skyrocketing.
3 Cons of Using Lead Flashing
Is lead flashing the perfect solution? Find out the disadvantages of using lead flashing on your home.
1. Toxicity
As mentioned, lead is toxic. When installing, if mishandled, it can pose health risks to you and the environment. While safe in its solid state, precautions are essential during installation, maintenance, and disposal to avoid exposure to lead dust or particles. If you're not confident in your DIY skills, consult a professional to get the job done.
What about the toxicity once the lead flashing has been installed? When it rains, the water will come in contact with the lead flashing. As a result, run-off water may become contaminated with lead. Therefore, if you use lead flashing, you must make sure that nobody (and no animal) consumes run-off water. This rainwater should be directed straight into the drains.
2. Heaviness
Lead flashing is heavy – literally. Its weight can make it harder to install and it may strain older or less robust roof structures. This adds both time and labour costs as you may have to speak to a professional. If your roof structure isn't strong enough, then you'll need to think about bolstering your roof.
3. Costly
Lead's durability comes with a price tag. Compared to more modern alternatives, it's a pricier option up front. While it often pays off in longevity, the initial investment can feel steep for some homeowners.
Alternatives to Lead Flashing
Lead flashing is a durable option which is perfectly safe. But if you're seeking another, more cost-effective option, there are several other flashing options:
- Aluminium flashing is a lightweight and corrosion-resistant choice
- Rubber flashing is a flexible and affordable
- Zinc flashing is a durable and less toxic alternative, often used in high-end roofing projects
- Plastic flashing is lightweight and inexpensive, though less durable than metal options
- Bitumen flashing is self-adhesive and waterproof – a quick and easy solution for small repairs
Research the details of lead flashing at Bunnings or another retailer by searching lead flashing Bunnings' before making your decision or taking action.
Final Thoughts on Lead Flashing
Lead flashing is a classic for a reason. Its durability, flexibility, and weatherproofing qualities make it a popular choice for homeowners looking for long-term reliability. However, its weight, cost, and potential health concerns mean it's not for everyone.
With a growing list of alternatives on the market, you have more options than ever to tailor your roofing needs. Research 'Bunnings lead flashing' to make the right choice for your roof.
The bottom line? Whether you choose lead or a modern alternative, proper installation and maintenance are key to keeping your roof watertight and worry-free.
FAQs
What Has Replaced Lead Flashing?
Materials like aluminium, zinc, and rubber are popular replacements for lead. They're lightweight, cost-effective, and less toxic than traditional lead – making them a popular choice among Australian homeowners.
Why Are Lead Flashings No Longer Used for Roofing?
While lead is still used in some cases, concerns about its toxicity and environmental impact have led to a decline in popularity. Additionally, the manufacturing of alternative materials that are less toxic and more cost-effective means that homeowners have more choice.
Is Lead Flashing Bad for You?
Lead flashing itself isn't harmful when installed correctly. However, improper handling, especially during installation or removal, can release lead particles that pose health risks. It's best to speak to trained professionals to install your lead flashing.
Can You Reuse Lead Flashing?
Absolutely! If your lead flashing is in good condition, it can often be removed and reused. That said, make sure to inspect it for signs of wear and tear before reinstallation.
Is It Okay to Paint Lead Flashing?
Yes, painting lead flashing is a good idea, especially if you want to improve its appearance or add an extra layer of protection. Use a paint specifically designed for metal, and make sure the flashing is clean and dry before applying. This can also help prevent oxidation from forming over time.