I recently undertook a large job of putting down 23 tonne of screed, there is a lot of effort to put in if you want insulation underneath and the finished level exactly where 'you' need it to be.
I also laid in several km of underfloor heating pipe, distributors & manifolds ... I was asked to put this into a document for the UK_SelfBuild list ........ thought I would post the details here in case there are any DIY'ers contemplating a large screed job.
Rick .>>>
I recently posted details of preparing my floors for screed - insulation boards, insulation upstand, using laser level etc .... several emailed for more details so I have put this into a Word doc - along with pictures.
So if you are putting in UFH with screed, this may be worth a read.
It's in the files area in the download folder, or paste the following link into your browser:-