Watch the following video which gives general instruction for installing Infloor Heat and Gypcrete. The Infloor heat is installed first, whether it is electric radiant heating cables or hydronic (hot water) tubing. The Gypcrete is self leveling and provides a very smooth and level floor and the Infloor Heating adds the warmth so you finish up with warm, level floors!!

https://www.youtube.com/watch?v=h7cwoxMJh3o