The lead flashing that seals roof intersections and joints plays a crucial role in ensuring that water cannot penetrate the vulnerable parts of your roof. Without it, you’d be encountering numerous problems that could be expensive to repair. The thing is, it often looks different to the rest of the property, and for some homeowners, that won’t wash!
So, can you paint your lead flashing? You could, but you shouldn’t. For one, the paint won’t stick particularly well, and two, it will crack and peel, making your roof unsightly.
So what can you do? If you can, but shouldn’t paint lead flashing, what are your options? In this edition of our blog, we’ll explain.
What is lead flashing?
Lead flashing is the thin pieces of lead sheeting found around roof joints, chimneys, walls and roof windows. They seal areas where water may find a way in. This could be around chimney stacks, skylights, roof junctions or at the top of roof valleys.
Lead flashings play a crucial role in roof protection as they prevent leaks and damp patches inside your home, and minimise the chances of structural damage, mould growth and water harming electrical installations.
Why can’t you use paint on lead flashing?
Lead expands and contracts as temperatures change, and in London, thanks to our rather inconsistent weather conditions, this expansion and contraction is constant. If you were to apply regular paint to lead flashing, this frequent change in the surface would result in the paint cracking and peeling, making it far from attractive.
Furthermore, lead flashing oxidises. This reaction to the oxygen in the air means that the paint, in most cases, doesn’t stick. You are then left with an unpleasant white powder underneath, which further adds to the less-than-appealing visual aesthetic of a painted lead flashing.
What can you paint lead flashing with?
Rather than paint lead flashing, patination oil provides a suitable alternative. Because uncoated flashing can discolour over time, and paint can crack or fail to adhere, patination oil keeps your lead flashing looking good, and the roof remains protected.
Patination oil works by allowing the lead flashing to breathe, removing the oxidisation problems that would otherwise occur. This means the lead flashing won’t discolour and will maintain its appearance for years.
After some considerable time, the flashing may start to look a little grey or show signs of weathering. Just reapply the patination oil and benefit from many more years of optimal roof protection.
How do I apply patination oil?
Applying patination oil to your lead flashing is easy, but it should be done with care. Firstly, wear gloves and a mask. Lead can be a dangerous material to work with.
Then, apply the patination oil to a cloth and gently rub it into the lead flashing. You’ll notice that the flashing turns a little darker as you rub the oil in. This is simply the lead absorbing the oil. Continue to apply the oil until you are satisfied that all areas are covered.
In some cases, the discolouration of the flashing may be severe. You’ll notice this when there are signs of white powder on it. With a stiff brush, gently wipe the powder away and then pour water over the flashing to clear any remaining debris. Once dry, you can then apply the oil.
Can I apply patination oil myself?
Yes, you can, although it may be best to seek help from a roofing contractor. This is because lead is a volatile material, and constant exposure to it could be harmful. Having a professional, equipped with all the correct safety equipment and a knowledge of lead flashings, will reduce any risk and result in a high-quality end result.
At London Property Services, we conduct comprehensive, safe and trusted roof repairs. LPS Direct’s lead roofing repair team in London help with more than just lead roofs. Our team of roofers in London can also repair and install asphalt roofing, pitched roofs, flat roofs and conduct gutter repairs. Our versatile team ensures you get the best from your roof all year round. Contact us today to find out more or to book a repair.
