The clearest signs are a gutter sagging or pulling away, flaking paint that returns within a year, visible soft spots or dark staining on the boards, gaps at the corners, birds getting in, and green growth on the soffit. A sagging gutter in particular usually means the fascia has gone soft, not that the brackets are loose.
- A gutter that sags or pulls away is a fascia problem far more often than a bracket problem.
- Paint that flakes again within a year means moisture is coming from behind.
- Birds nesting in the eaves means there is already a gap.
- Most of this is visible from the ground with binoculars on a dry day.
The eight signs, ranked
| Sign | What it usually means | Urgency |
|---|---|---|
| Gutter sagging or pulling away | Fascia soft; brackets losing grip | High |
| Paint flaking within a year of repainting | Moisture behind the board | High |
| Dark staining or green growth on soffit | Water running where it should not | High |
| Soft spots when pressed | Active rot | High |
| Birds or wasps in the eaves | There is already a gap | Medium |
| Gaps at corners or joints | Movement, or decayed fixings | Medium |
| Cracked or brittle uPVC | End of life; usually 20–25 years | Medium |
| Discolouration of white uPVC | Cosmetic only | Low |
| Daylight visible from inside the loft at eaves | Board failed or missing | High |
| Water marks on the wall below the eaves | Gutter or eaves detail failing | High |
Only one row on that list is purely cosmetic. Discoloured white uPVC is ugly and is doing its job; everything else is telling you water is going somewhere it should not.
The sagging gutter clue
This is the most useful single indicator, and it is almost always misread.
When a gutter starts to sag, dip in the middle of a run, or pull away from the house, the instinct is that the brackets have worked loose and need refixing. Sometimes that is true. Far more often the brackets are fine and what they are screwed into has gone soft.
A full gutter is heavy. Every bracket is transferring that weight into the fascia board behind it. Sound timber or uPVC on sound timber holds it indefinitely. Timber that has been quietly taking water for years does not — the screw threads lose their grip in softened fibres and the bracket slowly pulls out under load.
The way to tell: push firmly up on the underside of the gutter near a bracket. If it moves with a soft, spongy feel rather than solid resistance, the fascia has gone. Or look at a bracket screw head — if it has pulled outward and there is a dark ring around it, water has been tracking in.
Why it matters is the feedback loop. A sagging gutter holds standing water, standing water overflows or seeps at the joints, that water runs down the fascia, and the fascia softens further. Refixing the bracket into the same soft timber buys a season.
This is also why gutter faults and roofline condition are the same conversation. Fixing one without checking the other usually means returning.
What you can check from the ground
- Walk round the house on a dry day and look up at each elevation in turn. Binoculars or a phone camera at full zoom work well and are a great deal safer than a ladder.
- Look along the gutter line. It should be straight and falling gently to the outlet. Dips, kinks or a visible step at a joint are all faults.
- Look at the soffit underside for dark streaks, green algae growth, or staining radiating from one point — that point is where water is getting in.
- Look at the fascia face for flaking paint, blistering, splits along the grain, or a wavy line where the board has swollen.
- Check the corners where fascia meets bargeboard, and where gutters have stop ends. Gaps there are entry points.
- Watch for birds. Repeated traffic in and out of the eaves in spring means there is a hole.
- Look at the wall below the eaves for staining or a green vertical stripe, which means water is coming over or behind the gutter.
- Go into the loft on a bright day and look towards the eaves. Daylight where there should be none means a board has failed. Also look for damp staining on the rafter feet.
That last check is the most informative and costs nothing. The underside of the roof at the eaves tells you directly whether water has been getting in, and dark staining or mould on the rafter ends is the evidence that a roofline job is overdue rather than optional.
Timber and uPVC fail differently
Timber
Fails by rot, and it fails from the back and the top edge first — the faces you cannot see. That is why timber roofline can look passable from the ground and be gone when touched. The sequence is usually paint failure, water ingress at a joint or the top edge, softening, then structural failure where the brackets are. Repainting a board that is already soft achieves nothing but hiding it. Well-maintained timber lasts a very long time; the problem is that maintaining it means a ladder, a dry spell and repainting every few years, and most people stop.
uPVC
Does not rot, so it fails differently. Over roughly 20 to 25 years UV makes it brittle and it loses impact resistance, so it cracks at fixings or where a ladder leans. White boards yellow, which is cosmetic. Cheaper grades go brittle sooner and discolour faster. The failure that matters is cracking, because a cracked board lets water to whatever is behind it.
Capped timber
The hybrid, and the one that hides the most. A uPVC cover board over old timber looks like new roofline from the ground. Where the timber behind was sound and dry, it is a legitimate and economical approach. Where it was not, the rot continues unseen, and the first sign is usually the gutter sagging because the fixings have lost their grip in timber nobody has seen for a decade.
The fixings
Often overlooked. Boards fixed with the wrong fasteners, or fixed only into the fascia rather than into the rafter ends, work loose regardless of the material. On a replacement, what the boards are fixed into matters as much as what they are made of.
Repair, replace, or leave it
Not every defect needs a full replacement, and it is worth being honest about which is which.
Leave it: discoloured but sound uPVC, minor surface weathering on timber that is still hard, a single loose bracket on an otherwise straight run.
Repair: one rotten section on an otherwise sound timber roofline, a single cracked uPVC board, localised bracket refixing where the board behind is genuinely firm, a gap at one corner.
Replace: multiple soft sections, any evidence of wet rafter feet, a gutter line that cannot be made straight because the board will not hold fixings, brittle uPVC cracking at several points, or no ventilation in the soffits at all.
The practical argument for doing a whole elevation rather than patching is access. Most of the cost of roofline work is getting up there safely — scaffold or a tower, set up and taken down. Doing one board costs nearly as much in access as doing the run, so repeated small repairs cost more in total than one proper job.
The same logic is why it is worth checking the roofline whenever scaffold is up for anything else. If the roof, the render or the painting is being done, the access is already paid for.
Timing matters less than people think, with one exception: if the rafter ends are getting wet, that is a structural timber problem progressing quietly, and it is the one case where waiting genuinely costs more.
What it costs
These are the roofline figures published across this site:
| Job | Typical Coventry guide price | Notes |
|---|---|---|
| Per elevation (fascia + gutter) | £400–£700 | Front or rear |
| Full uPVC fascia, soffit & guttering (semi) | £1,000–£1,500 | Supply & fit |
| Labour | ~£30/hr | Qualified roofline fitter |
| Gutter clean & reseal | £80–£200 | Clears blockages, stops overflow |
The per-elevation figure is the useful one when deciding whether to do the front, the rear, or everything. Rafter end repairs are the item that cannot be priced until the boards are off, so ask for a rate for that work rather than accepting a figure that assumes none is needed.
Push up on it. If it feels spongy rather than solid, the fascia has gone and refixing the bracket will buy you a season.
Frequently asked questions
Why is my gutter sagging?
Usually because the fascia behind it has softened, not because the brackets are loose. A full gutter is heavy and the screws lose their grip in decayed timber. Push up on the gutter near a bracket — if it feels spongy rather than solid, refixing into the same timber will not last.
How do I know if my fascias are rotten?
Flaking paint that returns within a year of repainting, dark staining or green growth on the soffit, soft spots when pressed, gaps at the corners, and a gutter that sags. From inside the loft, daylight at the eaves or dark staining on the rafter feet confirms it.
How long do uPVC fascias last?
Typically 20 to 25 years. They do not rot, but UV makes them brittle over time so they crack at fixings or where a ladder leans, and white boards yellow. Discolouration is cosmetic; cracking matters, because a cracked board lets water through to whatever is behind it.
Do birds in the roof mean the soffits have failed?
It means there is a gap somewhere, which usually means a board, joint or corner has failed or was never closed properly. Birds and wasps find openings people cannot see from the ground, so nesting activity in the eaves is a reliable indicator worth investigating.
Can I just repaint timber fascias instead of replacing them?
Only if the timber is still hard. Timber roofline rots from the back and top edge first, so a board can look passable and be gone when touched. Painting over softened timber hides the problem rather than solving it, and the paint will flake again within a year.
Should I replace the whole roofline or just the bad bits?
Most of the cost is safe access, so doing one board costs nearly as much as doing the whole run. Repeated small repairs usually cost more in total than one proper job. Patching makes sense for a single defect on an otherwise sound roofline, and not much else.
Check the rafter ends, not the paint
Wet rafter feet are the one finding that makes this urgent rather than optional. We look in the loft as well as at the boards.