backdrop background beach coast coastal coastline colors colours conservation conserve conserving contrast contrasting cultivation dune-flora dunes environment environmental flora foliage grass grasses green greenery growing growth leafy leaves levels light natural nature ocean ocean-edge ocean-waterline path plants salt-resistant sand sand-dunes scrub tides track vegetation water waterline color colored colour coloured layers rocks rocky rough sea seashore seaside shade shadows shapes shore shoreline shrubbery shrubs Sizes stones stony sunlight sunshine surface surfaces surfacing textured textures tidal tide trees varied variety angles appearance building capping cleaning cover covered covering danger dangers ear protection edge exterior external height high high-pressure improvement maintenance pressure pressure-cleaning renovating renovation repairs restoration restoring risks risky roof roof-area roofing rooftop safety skies sky spray tiles tiling tools tough wet work workman