2 )P & S raise the space under the first step onside decks 1 cm put a new drainage hole with fibre gals tube as far away from the hatches as possible fill existing drainage holes increase lower water proof barrier by 1 cm and decrease the lower section of the lifting step such the stairs press evenly onto the fixed frame 
 
3) P & S construct new deck hatches from foam fibre glass mat and epoxy use hinges from the deepfreeze I will check to see if I can get anther 2 closing latches make sure the new hatches are 100% alighted 
 with the deck flange and are stiff increase the drainage pipes to as large as practical minimum 2 cm Finish the deck side of the hatches to under coat stage 
4) fill holes in side of top level finish to undercoat stage repair cracked bog and bubbling on S side top level to undercoat stage