Winter roof leaks, frost damage and what to do first
Winter doesn't create many new roof defects. It finds the ones that were already there and makes them expensive.
Freeze-thaw
Water sitting in cracked mortar, porous brick on a stack, or a spalled tile expands when it freezes and widens the crack. A hairline defect in November can be an open joint by March.
Ice in gutters and valleys
Blocked gutters that hold water freeze solid, and the ice dams water back under the tiles at the eaves. It's another reason the autumn gutter clear matters.
Is it a leak or condensation?
Winter is peak condensation season. Damp appearing in cold, still weather rather than during rain, spread across the loft rather than in one place, points at ventilation.
What to do when water comes in
Contain it inside, move what you can, isolate affected electrics, photograph everything, and get a make-safe booked. Don't go on a wet or frosted roof.
What we can and can't do in freezing weather
Make-safe work carries on. Some materials — mortar, certain adhesives and resin systems — can't be applied reliably below certain temperatures, so permanent repairs sometimes wait for a window.
FAQs
Emergency make-safe work, yes, in most conditions. Some permanent materials need temperatures above a threshold, so those get scheduled to a suitable window.
That pattern usually indicates condensation rather than water ingress, and the fix is ventilation.
We prioritise active interior leaks within our coverage area — call and we'll tell you honestly when we can be there.
Related reading
More on maintenance & seasonal and the jobs that usually come with it.
- Autumn roof checklist before the wet seasonMaintenance & seasonal
- What should a roofing quote include?Costs & budgeting
- Roof moss removal: when it matters and when it doesn't
Looking for something specific? See our roofing services, cost guides, common roof problems or the areas we cover.
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