Got a Problem with Your Metal Roof? Let’s Get Straight to It.
Metal roofs are tough, but they’re not invincible, especially with the coastal weather we get here in Brighton and Worthing. When they start to fail, you need to know what you’re dealing with. Here are the straight answers to the questions I get asked most often when I’m up on a roof, looking at a leaking metal sheet.
So, Why is My Metal Roof Leaking?
It’s almost always one of a few culprits. Over my 18 years, I’ve seen the same patterns again and again on homes across Sussex. Here’s the usual list:
- Failed Fasteners: The screws or nails holding the panels down have rubber washers that perish over time. They crack, fall apart, and let water seep in right at the fixing point. This is the number one cause of slow, annoying leaks.
- Seam Problems: Where two metal panels overlap (the seams), the sealant can degrade. Thermal expansion and contraction—the metal moving as it heats and cools—pulls the seams apart, breaking the seal.
- Rust and Corrosion: If the protective coating on the steel gets scratched or worn away, rust isn’t far behind. A small spot of rust can quickly become a pinhole, and then a proper hole. This is especially common on older garage roofs.
- Flashing Failures: The metal flashing is the bit that seals the joins between your roof and things like walls or chimneys. If this is bent, has come loose, or the sealant has failed, you’ve got a direct path for water into your home. This is a critical failure point I often have to address with professional lead flashing repair.
Can I Just Slap Some Sealant On It Myself?
Honestly? Yes, you can. You can go buy a tin of fibre-reinforced paint or a tube of roofing silicone and patch the area you think is leaking. It might even stop the leak for a few weeks, maybe even a few months if you’re lucky.
But here’s the hard truth: it’s a temporary band-aid, and you could be making the problem worse. If you just paint over rust without properly grinding it back, treating it, and priming it, you’re just trapping moisture underneath. The rust will continue to eat away at the metal, hidden from view until it’s a much bigger, more expensive problem.
A DIY patch is a short-term fix for a long-term problem. It’s not how I do things.
How Do You Repair a Metal Roof Properly Then?
When I’m called out to a job in Hove or Brighton, my approach is about longevity. A proper repair means fixing the underlying cause, not just covering the symptom.
- Inspection & Cleaning: First, I find the exact source of the leak, which isn’t always where the drip is. Then I thoroughly clean the area with a wire brush or grinder to get back to bare, solid metal. No shortcuts.
- Fastener Replacement: If the fasteners are failing, I don’t just tighten them. I back them out and replace them with new, larger-gauge screws with fresh, high-quality EPDM washers that create a watertight seal.
- Panel & Seam Repair: For small holes, I’ll use a professional-grade metal patch sealed with butyl tape and high-performance sealant. For failing seams, I clean them out completely and apply new, modern sealants that can handle the expansion and contraction. For larger areas of damage, the only real solution is to replace the entire panel.
- Coating & Sealing: Once the structural repairs are done, I can apply a professional-grade elastomeric or silicone coating system that seals the entire roof surface, including the fasteners and seams, creating a seamless, waterproof membrane.
I give you a fixed-price quote before I start, and you get access to a client portal with daily photo updates. You see the job done right, step by step.
What If My Whole Metal Roof Looks Rusted and Worn Out?
There comes a point where patching is just throwing good money after bad. If your roof has widespread rust, multiple active leaks, or the panels are dented and damaged from past ‘repairs’, it’s time to talk about replacement.
Repairing one leak when another ten are just waiting to happen is not a solution I’m comfortable with. It’s better to invest in a new system that will give you decades of peace of mind. This is something we can determine with a proper look. If you’re unsure, the best first step is always to book a free roof inspection so I can give you an honest assessment on the ground.
Help! I Have an Urgent Leak Right Now!
If water is actively dripping into your house, the first thing to do is damage control. Put a bucket under the leak. If it’s bulging the ceiling, carefully pierce the bulge with a screwdriver to let the water out in a controlled way. It’s better to have a small hole to patch than a whole collapsed ceiling.
Once you’ve done that, don’t wait. A leak can cause serious structural damage fast. I have a dedicated service for these situations. You can use my online system for an urgent leak booking to get a priority response.