Help! Where do water proofing and insulation need to go?

[PeterRayner]

Currently having men working on roof - wanting to leave - i.e. paid off!
Have searched site and cannot find the answer. They started off putting water proof layer and insulation layer under clay tiles directly. Last night I noticed an area that had not been done at all - just bare roof tiles and pointed it out to them ( it's not easy to see or access). After mutters they said they would put the water proofing up there - but would not take off the tiles - i.e. the water proofing will only be fixed to the rafters. I am worried this is not satisfactory.
Also - can the insulation layer be just laid onto the top of the concrete ( I think ) ceiling - i.e. "floor" of the roof space - it is a type of glass wool? Would be so grateful if any help as have never done this sort of job before.

 

[freddiemercurystwin]

Photos please and a better description of what work you've had done.

 

[SurreyRoofingEstimator]

seconded, the description of the work is very odd and photo's will help enormously

 

[Alastairreid]

Waterproof membrane is fixed over the rafters and under the tile batten.
fixing it retrospectively in the attic is pathetic.

Insulation in your roofspace would normally consist of glass/mineral wool laid between and over the rafters to achieve a minimum of 240mm depth.

Thats if i have deciphered your post correctly .