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 sunlight sunshine tiles tiling tools tough water wet work workman architectural architecture christian church church-complex color coloration colored colour coloured community contrast contrasting cross decorated decorative distinctive edged edges elements faith heritage light modern New ornament ornamental ornamentation patterned patterns perspectives religious Renovated renovations Singapore surface surfaces textured textures views wall windows shapes