KlingKlang

I have just bought a new unit with a roof terrace with an area of about 800 sqft. I understand that there is a ruling to how much it can be roofed over (not airconditioned). Part of my roof terrace has a trellis bulit by the developer. I am thinking of extending it to provide a dining area but not to take up the whole area. I intend to have some garden landscaping with a small pond at one side. Is that allowed? I agree with blue skies that laying wooden planks over the tiles may not be ideal as it could house bugs underneath...scary thought. Is there no way to maintain them so that they can be pest free? Maybe by spraying insecticide occasionally? The 'planks' I saw at some landscaping stores comes in tiles and can be removed easily (?)