Why Coastal Homes Take a Harder Beating

If you live within a mile or two of the shoreline, your windows are working in conditions that an inland property rarely experiences. Wind-driven rain arrives almost horizontally, salt crystals settle into every joint and hinge, and gusts that funnel between buildings can hit far harder than the forecast suggests. Add the abrasive effect of sand and sea spray, and the average coastal window faces a decade of wear for every five years of an inland equivalent.

The good news is that most storm damage is preventable. Water almost never enters through the glass itself; it creeps in through failed seals, blocked drainage channels and fixings that have quietly corroded out of sight. A few hours of inspection before the gales arrive can save you a winter of draughts, damp patches and expensive joinery repairs.

Inspect Every Seal Before the Wind Picks Up

Seals are your first line of defence and the first thing to fail. Run a finger along the external mastic bead around each frame. It should feel springy and firmly bonded. If it crumbles, pulls away or has gone chalky, water will find the gap behind it during the first driving rain.

• External mastic: cut out failing silicone and replace with a low-modulus, marine-grade sealant that stays flexible in cold weather.
• Glazing gaskets: check the rubber between glass and frame. Shrinking or perished gaskets let water track down into the rebate.
• Opening sashes: draught-proofing strips compress over time. Replace brush or bubble seals if a sheet of paper slides out easily when the window is closed.
• Trickle vents: clean them out and check the flap still seats properly. A jammed vent is an open door for wind-driven rain.

Window and door seals should be inspected twice a year in exposed locations, ideally in early autumn and again after the worst of the winter. If your home faces open water with no sheltering headland, treat spring as a third check, once the salt has had a season to work on the rubber.

Shutters, Boards and Secondary Glazing

Storm shutters are standard in coastal Florida and increasingly common on exposed UK headlands for good reason. A properly anchored shutter doesn't just protect the glass; it takes the pressure off the frame and stops wind-driven debris from punching through.

If permanent shutters aren't practical, prepare removable marine-ply panels now, labelled and pre-drilled so you're not hunting for a drill in the dark. Fit them with marine-grade stainless steel fixings to A4 or 316 specification. Standard screws will rust solid within a season and can stain render and stonework permanently.

Secondary glazing is an underrated option for listed or heritage properties where external alterations are restricted. A well-fitted inner pane reduces draughts, cuts heat loss and adds a second barrier against water ingress. Speak to a joiner about frames that can be removed in summer without damaging the original window reveal.

Drainage, Sills and Run-Off

Water that can't drain away will eventually find a way in. Coastal windows are especially vulnerable because sand, salt and wind-blown debris clog the channels that should be carrying water back outside.

• Weep holes: clear them with a thin wire or cocktail stick. Never seal them up, however tempting they look in a howling gale.
• Drip grooves and sills: check the underside drip line is intact and that the sill slopes outwards. Water pooling on a flat sill will soak into the wall below.
• Gutters and downpipes: clear them before storm season. Overflowing gutters dump water directly onto window heads and lintels.
• Ground levels: make sure external paving falls away from the building. A French drain or simple gravel trench along a vulnerable elevation is worth the effort.

If you store sandbags, keep them somewhere genuinely accessible. Stacked at the back of a flooded garage, they're useless.

Hinges, Handles and Hidden Metalwork

Salt air attacks metal relentlessly, and window hardware is usually the first casualty. Check that hinges, espagnolette bars, locking handles and stay arms move freely and engage properly. A window that won't lock tight in a gale is a window that will rattle, leak and eventually fail.

Apply a marine-grade lubricant to moving parts each autumn, and wipe down handles and hinges with a damp cloth to remove salt deposits. Where hardware is beyond saving, replace it with 316-grade stainless steel rather than whatever the local DIY aisle happens to stock. It costs a little more and lasts several times longer on the coast.

What to Do When the Forecast Turns

Once a named storm is confirmed, work through a short routine. Close and lock every window firmly, including those you rarely open. Remove planters, garden furniture and anything loose from window ledges and balconies. Lower and secure any awning or canopy. If gale-force gusts are forecast, keep curtains drawn and stay away from glass on the exposed side of the house.

After the storm passes, check for hairline cracks in the glass, water staining around reveals and any new draught that wasn't there before. Photograph anything that looks wrong and get a specialist out early. Fixing a failed seal in October costs a fraction of replacing rotted timber and replastering an internal wall in February. On the coast, a little preparation each autumn is simply part of living well by the sea.