The Profix Floor Panel has multiple pipe retention clips to secure the pipe in place. The purpose designed supports provide a structural key for tile adhesive & low profile screeds. The snap clips helps to fasten the panels together & the multiple break points with V shaped notches aid in cutting knife alignment. Benefits from a unique slide & lock to connect the panels together. Ultra-low profile for either a 10mm or a 12mm pipe. For a 3mm covering of levelling compound on top of the Profix Panel you will require 25kg of self levelling compound for every 0.9m 2 area. Meaning that for a 10m 2 area you will need 277kg which equals 12 bags @ 25kgs. Area divided by 0.9 = number of 25kg bags you will need If using 20kg bags divide the area by 0.72 to calculate how many bags you will require.