Thinking About the Tiles on Your Roof? Here’s My Honest Advice

When customers ask me about the tiles on their roof, they usually fall into two camps: either they’re worried something is wrong, or they’re wondering how long the roof will actually last. After 18 years on roofs around Brighton, Hove and Worthing, I can tell you this: most tile problems start small and quiet, then suddenly turn into a leak and a big bill.

In this guide I’ll walk you through how I look at a tiled roof, what really matters, and what you can safely leave for later. No scare tactics, just the same straight advice I give on-site.

What the Tiles on Your Roof Are Really There to Do

Most people think the tiles are the entire roof. They’re not. The tiles are just the outer shell. Underneath you should have breathable felt (or older bitumen felt) and battens nailed into the rafters. All three work together.

If you ask me, the tiles have three simple jobs:

  • Keep most of the rain off the felt and battens
  • Protect your house from UV and wind
  • Let water drain down into the gutters instead of backwards into the loft

When the tiles, felt or battens fail, you get leaks. Sometimes the leak shows up in a completely different place to the broken tile, which is why guessing from the ground is so risky.

How I Quickly Judge the Condition of Your Roof Tiles

When I climb up to look at a tiled roof, I run through the same mental checklist every time. You can do a basic version of this from the ground with binoculars, but never walk on your tiles yourself – I’ve seen more damage from DIY foot traffic than from storms.

1. Are the Tiles Sitting Straight and Even?

I first look at the overall “line” of the roof:

  • Do you see any obvious dips or humps?
  • Are there odd gaps you can see sky through?
  • Do the rows look straight, or are they buckled?

Dips can mean rotten battens or sagging rafters. Random gaps usually mean slipped or broken tiles and missing fixings.

2. Are the Tiles Cracked, Spalled or Flaking?

On concrete tiles I look for surface wear, crumbling edges and exposed aggregate. On clay tiles I look for cracks, spalling (surface flakes coming off), and tiles that sound “dead” when tapped.

If a few tiles are damaged, it’s usually a repair job. If the whole slope is visibly worn, that’s your roof telling you it’s coming to the end of its life, even if it isn’t leaking yet.

3. What’s Happening at the Edges and Details?

In my experience, roofs almost never start leaking in the “nice middle bit”. Leaks usually start:

  • Around chimneys and lead flashings
  • At valleys where two roof slopes meet
  • Along the eaves and gutters
  • At the ridges and hips (the top and corners)

I always pay extra attention to these areas, because one loose ridge tile or a split valley tile can soak a loft in a heavy downpour.

Common Tile Problems I See in Sussex (And What They Really Mean)

Over the years I’ve seen the same patterns again and again across Brighton, Hove and Worthing. Here’s what different problems usually tell me.

Slipped or Missing Tiles

One or two slipped tiles on a fairly modern roof can just be wind damage or a failed nail. On an older roof, repeated slipping often means the battens or nails are shot.

My approach:

  • Isolated damage: replace the tiles and check the felt and battens underneath
  • Repeated or widespread slipping: discuss whether a section of batten and felt needs replacing, not just the tiles

Cracked or Broken Tiles

Cracks often appear around:

  • Valleys
  • Walked-on areas (near Velux windows or satellite dishes)
  • Ridge and hip tiles

One cracked tile directly above a damp patch in the ceiling is an urgent repair. A handful of cracked tiles on a dry loft might be something we monitor and plan for rather than rush.

Moss, Lichen and Dirt on Tiles

This is one where people are often misled. In my 18 years on roofs, I’ve noticed that moss is rarely the main problem – the scare stories usually come from companies selling aggressive cleaning.

Here’s my honest view:

  • A bit of moss and lichen on older tiles is normal and mostly cosmetic
  • Heavy moss at the bottom of the tiles can cause water to track sideways instead of downwards
  • Bad scraping and pressure washing can snap tiles, strip surface coatings and flood the loft

If moss is blocking your gutters or pushing tiles apart, I’ll deal with it carefully as part of a repair. But I don’t recommend aggressive “roof cleaning” just for the sake of colour.

Discoloured or Patchy Tiles

Uneven colour doesn’t always mean trouble. The things I look for are:

  • Areas that stay wet much longer than the rest of the roof
  • Concrete tiles that have worn so thin the surface layer is mostly gone
  • Random patch repairs with totally different tiles that might hide a bigger issue underneath

Sometimes I find nice-looking tiles sitting on rotten battens and torn felt. That’s why I never judge a roof only from the outside.

Tiles on a Roof vs. What You Can’t See: Felt and Battens

The tiles are the part you notice, but the hidden layers often decide whether a roof can be saved with repairs or really needs stripping.

When I lift a few tiles to check underneath, I look for:

  • Felt that is brittle, split or disintegrating
  • Battens that are soft, rotten or full of nail holes
  • Signs of past leaks: black staining, mould or old patch repairs

If the felt and battens are failing in one local area, you might get away with a targeted section of batten and felt replacement. If they’re failing all over, it’s usually more cost-effective in the long run to plan a full strip and re-tile, especially if the tiles themselves are near the end of their life.

How to Spot Early Tile Problems From the Ground

You don’t have to climb up to get a rough idea of how your tiles are doing. Here are a few safe checks you can do yourself:

  • Stand back across the street: Look for dips, missing tiles, and wavy lines along the ridge.
  • Check after heavy rain: Any new damp patches on ceilings, especially near external walls or chimneys, are a red flag.
  • Look in the loft on a sunny day: Turn the light off and see if you can spot any pinpricks of daylight through the roof.
  • Inspect gutters from a ladder (carefully): Bits of mortar, tile fragments or lots of sandy debris can all point to tile or ridge decay.

If you’re ever unsure, it’s better to get me to take a proper look than to guess. You can book a free roof inspection in Brighton and Sussex, and I’ll tell you exactly what’s going on without any pressure.

When a Few Damaged Tiles Become an Emergency

Not every broken tile is urgent, but there are situations where I tell people not to wait:

  • Exposed felt showing through from the ground – especially near the eaves
  • Active leaks – brown stains getting bigger, drips, or bubbling paint
  • Storm damage – tiles on the ground, visible gaps, or a flapping ridge tile
  • Loose tiles over public paths – risk to people walking underneath

If you’ve just had storm damage or a sudden leak, use my priority emergency leak repair booking and I’ll fit you in as quickly as possible.

Tiles and the Rest of Your Roof System: Gutters, Fascias and Flat Roofs

In my experience, tile problems rarely live in isolation. Water doesn’t respect boundaries, it just follows the easiest path.

  • Blocked or undersized gutters can push water back under the bottom row of tiles.
  • Rotten fascias can let the eaves tiles sag and allow birds into the roof space.
  • Badly detailed joins between tiled roofs and flat roofs (over porches, garages or extensions) are common leak points.

If I’m working on your tiles and I can see related issues with your gutters or fascias, I’ll show you photos and explain the options. Sometimes a simple gutter and downpipe upgrade does more for your roof than replacing a handful of tiles every year.

Why Lead, Ridges and Valleys Matter as Much as the Tiles

When customers tell me they’re “sure it’s just a few tiles”, nine times out of ten the real culprit is the detailing around them.

The usual suspects:

  • Old or cracked lead flashing around chimneys, walls and dormers
  • Loose or mortar-cracked ridge and hip tiles that let wind-driven rain in
  • Blocked or broken valley tiles where two roofs meet

I always check these while I’m inspecting your tiles. There’s no point changing a few broken tiles if the lead flashing is falling apart next to them – you’ll just end up calling me back. If you want to tackle the root cause, I also handle professional lead flashing repair and replacement so the tiles and the details all work together.

Repair, Partial Replacement or Full Re-Roof – How I Decide

Here is how I think it through when I’m standing on your roof looking at your tiles:

1. Simple Tile Repair

I normally recommend a straightforward repair when:

  • The damage is limited to a small area
  • The rest of the tiles, felt and battens are sound
  • The roof age and condition suggest plenty of life left

I replace the damaged tiles, check the felt and battens underneath, and tidy any small issues that could turn into future problems.

2. Sectional Strip and Re-Tile

This suits roofs where one part is failing but the rest is reasonably healthy. For example:

  • South-facing slopes that have worn much quicker
  • An old valley area that has leaked on and off for years
  • A section under a big tree that’s trapped moisture

I strip tiles in that section, renew the felt and battens, and either re-use sound tiles or install new matching ones, depending on the situation.

3. Full Strip and Re-Tile

I only recommend a full re-roof when it’s genuinely the sensible option in the long term. Signs include:

  • Widespread tile wear, cracking or slipping
  • Felt and battens failing in multiple areas
  • Ongoing patch jobs that never really fix the leaks

In those cases, spending money on temporary patching every year or two doesn’t make sense. I’ll talk you through the costs clearly and give you a fixed-price quote so you know exactly where you stand.

How I Keep You in the Loop While I’m Working on Your Tiles

One thing customers tell me they like is seeing what I actually find up there. I don’t expect you to take my word for it when I say a tile, batten or valley is failing.

On every job I:

  • Take clear before, during and after photos
  • Upload them to your secure client portal so you can follow the progress
  • Explain in plain English what I’ve found and what I’ve done about it

You get fixed pricing, written documentation and visual proof of the condition of your tiles and the layers underneath – no mystery, no hidden extras.

Flat Roofs Next to Tiled Roofs – Don’t Ignore the Join

Many homes around Brighton, Hove and Worthing have a mix of tiled main roofs and flat roofs over garages, extensions or porches. The joins between tiled and flat roofs are some of the most common leak spots I see.

If you’ve got damp where your tiled roof meets a flat roof, it could be failing tiles, bad detailing, or the flat roof itself breaking down. I specialise in modern flat roofing systems, so if your tiles are fine but your garage or extension roof is tired, I can also help you plan a proper garage flat roof replacement that ties in correctly with your tiled roof.

My Straight Advice if You’re Worried About the Tiles on Your Roof

If you’ve read this far, you’re probably either dealing with a current leak or trying to catch problems before they get expensive. Here is my honest advice:

  • Don’t panic over a bit of moss – focus on cracks, slips and leaks first.
  • Never let anyone pressure-wash your tiles hard – the cure can be worse than the problem.
  • If you suspect an issue, get it checked properly instead of guessing from the ground.
  • Ask for photos and clear explanations – you’re entitled to see exactly what’s wrong.
  • Think long-term: ten decent tiles and sound felt are better than twenty cheap patches.

If you’re in Brighton, Hove, Worthing or nearby and you want a straight, no-nonsense opinion on the tiles on your roof, you can book a free roof inspection with me. I’ll climb up, take photos, and talk you through what I’d do if it were my own house – whether that’s a simple repair, a more detailed section of work, or leaving it alone for now and keeping an eye on it.