Should I hire a specialist roof terrace constructor?

Should I hire a specialist roof terrace constructor?

Lisa Andrews (Horticulturalist) gives expert video advice on: Do I need an architect to design a roof terrace?; Do I need a structural engineer for a roof terrace?; Should I hire a specialist roof terrace constructor? and more...

It is very useful to use a specialist roof constructor, especially as our sales over in roof gardens. We are used to dealing with roofs, and obviously you can't penetrate any roof surface. Everything has to be constructed into external walls and totally floating above the existing roof to protect it.