A roof leak is rarely where the stain is. Water can run along felt, rafters or the top of a wall before it shows on a ceiling. Leak investigation means following that path back to the source.
We combine what you have noticed, such as when it leaks and which wind direction makes it worse, with a loft and roof inspection to pinpoint the cause, then repair that specific weakness.
What this service covers
- Leaks around chimneys, stacks and abutment walls
- Failed or lifted lead flashings and soakers
- Leaks at roof windows, skylights and vent pipes
- Blocked or cracked valleys and gutters overflowing into walls
- Flat roof splits, blisters and failed upstands
- Condensation that is mistaken for a leak
Signs you may need it
- Staining that grows after heavy or wind-driven rain
- Drips only in certain wind directions
- Wet insulation or dark marks on rafters in the loft
- Peeling paint or damp on the top of internal walls
- Dampness that appears in cold weather without rain, which can be condensation
How we approach it
- 01
Your history
We ask when it happens, how long it has gone on, and what changed recently. Photos of the stain help.
- 02
Loft check
Where accessible, the loft shows water tracks, daylight and damp timber that point toward the entry point.
- 03
External inspection
We examine likely entry points on the roof: flashings, tiles, valleys and fixings near the internal mark.
- 04
Targeted repair
We repair the cause and tell you if any secondary issues, such as wet insulation, should be dealt with.
What affects the quotation
Your free written quotation is priced for your property and covers:
- How easy the leak point is to reach
- Whether the leak is intermittent and needs further observation
- Materials involved: lead, tiles, membrane or flat roof covering
- Extent of damaged underlay or timbers
- Internal access to the loft or ceiling void
Any guarantee depends on the job and materials and is stated in your written quotation.
Roof leak investigation and repairs: common questions
Why has a previous repair not stopped the leak?
Usually because the visible symptom was treated rather than the entry point. Wind-driven rain can enter at a flashing or valley and appear several metres away.
Could it be condensation instead?
Yes. Poor loft ventilation can create droplets on the underside of the felt that look like a leak, especially in winter. We'll tell you honestly if ventilation, not a roof defect, is the cause.
Is a leak an emergency?
An active leak near electrics or one that is spreading quickly should be treated as an emergency; call us 24/7. A small stain that appears occasionally can usually be booked in for inspection.