Roof problems
Is a missing slate or tile urgent?
What a missing slate or tile exposes, when it can wait, when it should not, and what determines whether one repair is enough.
- Evidence before expenditure
- Options, not pressure
- Updated 2026-09-16
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It depends on what sits beneath it and where it is. A single gap over sound underlay on a sheltered slope can often wait for a planned repair. The same gap where underlay is absent or torn, at a valley or chimney, or above a doorway in use, should be dealt with promptly because water and falling debris both have a clear route.
What the gap actually exposes
On a roof with sound underlay, the covering is the first line of defence and the underlay is the second. Losing one slate exposes the second line rather than the roof space, which is why the roof may not leak immediately.
Many older roofs have no underlay at all, or have underlay that has become brittle. There the gap exposes battens and the roof space directly, and rain driven at the slope will get in.
Where the gap is matters as much as its size
Water concentrates at valleys, behind chimneys, around roof lights and at abutments. A missing component in one of those places carries far more water than the same gap in the middle of an open slope.
Position also decides the safety question. Loose or slipped components above an entrance, pavement, drive or garden in use are a falling risk regardless of whether the roof is leaking.
- At or beside a valley, chimney, roof light or abutment
- On the elevation that takes the prevailing wind and rain
- Above a door, path, drive or seating area in use
- Where neighbouring coverings have already slipped
Why one gap is often not the whole story
A slate that has slipped because its nails corroded is telling you about the age and condition of every other nail on that slope. A slate broken by a falling branch is telling you about the branch. The repair is similar; the outlook is not.
That is why a competent repair visit looks at the surrounding area rather than only the gap, and says whether what has happened once is likely to happen again.
What evidence should you look for?
These are indications, not conclusions. Each one narrows where to look; only an inspection confirms a cause.
Neighbouring coverings have also moved.
Fixings across that slope may be at the end of their life rather than one component having failed.
Areas that may need investigating
- nails and clips
- batten condition
- extent along the slope
No underlay visible through the gap.
There may be no secondary defence, so wind-driven rain can reach the roof space directly.
Areas that may need investigating
- underlay presence and condition
- staining on timbers below
Urgency: Prompt repair
The covering has an opening in it. Even when nothing is coming in yet, the exposure is real and gets worse in the next spell of driven rain.
Treat it as more urgent if you see:
- There is no underlay beneath the gap
- The gap is at a valley, chimney or abutment
- Loose components sit above an area people use
- Water is already entering the roof space
Repair or replace?
Replacing the component and checking those around it is normally the proportionate response. Where the same slope keeps losing coverings, the sensible question changes from repair to how much life the fixings and underlay have left.
A local repair is realistic when
- Isolated loss with sound surrounding covering and fixings
Partial renewal is worth costing when
- Repeated losses along one slope or one detail
Further investigation is the right next step when
- Underlay condition cannot be judged without lifting coverings
How we can help
- Roof RepairsPlanned roof repair fixes an identified defect — slipped slates, cracked tiles, failed flashings, valley or ridge problems — before it becomes water ingress. Repairs are appropriate where the covering and structure are otherwise sound and the fault is localised.
- Storm Damage Roof RepairsStorm damage repair covers making a wind- or water-damaged roof safe, documenting the damage for an insurance claim, and carrying out the permanent reinstatement. The critical first step is a make-safe visit and photographic evidence recorded before anything is disturbed.
- Roof SurveysA roof survey is a documented assessment of a roof's condition, remaining service life and defects, delivered as a written report with photographs and prioritised recommendations. It is used for property purchases, planned maintenance budgeting, insurance, dilapidations and settling disagreements about whether a roof needs replacing.
Related questions
What should you do next?
If anything is hanging or loose above an area people use, keep clear of it and treat it as urgent. Otherwise arrange a repair visit and ask whether the surrounding fixings are in the same condition.
Last updated 2026-09-16.
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