In this guide, we’ll look at how to seal lead flashing to roof tiles. It’s surprisingly simple, as long as you’ve got the right sealant for the job. Read on to learn how to seal roof flashing, then get started!
A roof can remain in good condition for decades, as long as it’s well looked after. That means regular checks, and maintenance work when necessary.
We recommend inspecting your roof for damage about twice a year, checking that the sealant is doing its job. Ideally, you want to spot a leak in the early stages, before it causes damage.
Make sure you check the roof thoroughly, including the trim, flashing, valleys, gutters, joints and downspouts.
If you notice a leak, or an area that might be prone to leaking such as the flashing, you’ll need to learn how to seal roof flashing. In the sections below, we’ll show you what to do.
Sealing roof flashing is a relatively simple and straightforward job. However, before we show you how to seal roof flashing, take a moment to consider your choice of sealant.
There’s a wide range of roof sealants on the market, including products containing silicone, butyl, or polyurethane. But which one is the best for your roof?
Silicone sealant is a popular choice, as it’s flexible, waterproof, and UV-resistant. However, it can’t be painted, and it tends to crack over time.
Butyl creates high-strength seals, but not all butyl sealants are UV-resistant. If you’re thinking of using butyl, check the manufacturer’s instructions. You may need to avoid using the sealant in areas of the roof that have a lot of direct exposure to sunlight.
Another option is polyurethane. This kind of sealant is effective for sealing flashing and fixing small leaks. Most polyurethane sealants are waterproof, weatherproof, and UV-resistant.
Ultimately, the main factor to keep in mind is durability. For that reason, we recommend choosing a high-quality product.
Next, we’ll show you how to seal roof tiles – or, more specifically, how to seal lead flashing to roof tiles. By sealing around the gap, you can prevent leaks and improve the longevity of your roof.
You’ll need the following tools:
sealant
wire brush or sandpaper
cleaning materials (damp cloth, white spirit)
Here’s how to seal lead flashing to roof tiles:
- Inspect the area. If the lead flashing is very damaged, it will need to be replaced by a professional. For small gaps, you can use sealant.
- Clean the area. Remove any rust or old sealant using a wire brush or sandpaper. Then wipe down the surface with a clean cloth.
- Prepare the sealant. Insert the cartridge into the sealant gun.
- Apply the sealant. Apply a steady, consistent stream all the way along the joint, so it’s completely filled.
- Smooth the sealant. Immediately after application, use a tool to smooth the sealant. This helps to improve adhesion and creates a neater finish.
- Remove excess sealant. Use a cloth soaked in white spirit to remove excess fresh sealant.
- Wait for the sealant to cure. This may take up to 24 hours.
Afterwards, if you notice any signs of leakage, apply an extra layer of sealant.
Now you’re ready to get to work, find the best UniBond sealants for your project.
Share this project
