Weather & Storms

How Coastal Weather Affects Roofs

On the coast, salt and wind attack a roof in ways inland roofs never see. Here’s what changes, and how to protect a coastal roof.

JTBy James ThorntonRoofing Specialist
Reviewed by Rachel Adeyemi · Chartered Building SurveyorUpdated: 16 August 20266 min read
Rooftops on an exposed coastline
On the coast — the Fylde, the Wirral and Sefton shores, the Cumbrian coast — roofs face two things inland roofs largely escape: salt-laden air and near-constant wind off the sea. Both accelerate wear, and both call for detailing built to cope.

What the coast does to a roof

  • Salt corrosion — salt air shortens the life of nails, clips and lead flashings, so fixings fail sooner; see damaged flashing.
  • Stronger, more frequent wind — lifts and slips coverings on exposed elevations; see how strong winds damage roofs.
  • Wind-driven rain — with no shelter from the sea, rain is driven hard against verges and ridges; see wind-driven rain.
  • Faster general wear — the combination simply ages a coastal roof more quickly than a sheltered inland one.

Coastal roofs need corrosion-resistant detailing.

Salt, wind and driven rain age a coastal roof faster than a sheltered inland one, so corrosion-resistant fixings and sound leadwork matter more here. See the local area guides below.

Protecting a coastal roof

  • Use corrosion-resistant (e.g. stainless) fixings and clips
  • Keep ridges, verges and flashings secure and well-pointed
  • Inspect more often than an inland roof — especially after storms
  • Replace corroded nails and lead promptly

Frequently Asked Questions

It’s strongly advised. Salt air corrodes ordinary steel nails and clips quickly, so corrosion-resistant fixings and sound leadwork make a coastal roof last much longer.

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