Salt
Salt carried on sea air settles on everything. On metal it speeds up corrosion: plated screws rust, leave orange streaks and eventually fail. On timber it holds moisture at the surface. That's why we use marine-grade 316 stainless steel for screws, clips and balustrade fittings, and brackets rated for coastal use.
Sand
In Coatham and along the dunes at Marske, sand blows into gardens. It collects between boards and under decks, holding damp against the frame. We leave proper drainage gaps, keep the frame open to the air and lay membrane and gravel underneath so sand and water don't sit on soil.
Wind
Coastal gardens catch strong winds, particularly from the north and east. Raised decks and glass balustrades take the most load. We add bracing to posts, use deeper beams and fix balustrades through the frame. We also design for shelter: a slatted screen on the windward side, or a deck tucked into the lee of the house, makes a huge difference to how often you can sit out.
Sun
On bright days, sunlight reflects off the sea and sand. UV fades and weakens surfaces over time. We choose UV-stable capped composite or hardwood, and suggest lighter colours that stay cooler and hide salt residue.
Boards for the coast
Capped composite is our usual choice: the sealed shell keeps salt water out and it won't splinter or rot. Dense hardwoods also perform well and weather to an attractive silver. Pressure-treated softwood is the one we'd usually avoid within sight of the sea.
Care
- Rinse the deck and balustrades with fresh water every few weeks in summer and after storms.
- Brush out sand from corners and between boards.
- Wipe glass to remove salt film.
- Check fixings once a year; stainless should stay bright.
Coastal FAQs
How close to the sea can a deck be?
A deck can be built right by the seafront if the materials and fixings suit the exposure. The closer you are, the more important stainless fixings, capped boards and shelter become.
How often should we wash a coastal deck?
A fresh-water rinse every few weeks in summer and after any storm, plus a gentle clean with soapy water once or twice a year, keeps it looking good.