Hello, I'm new to this site and am hoping that the experts on here will be able to help me with this small project that I am about to undertake. Approximately 5 years ago I had builders in to carryout rather extensive extension works to my property, in this work was a kitchen extension with a small wc/shower room to the side of it. The size of this shower room is 76" x 44", but due to the money running ou,t this part of the project was never finished. We have now decided that it's long overdue and that I will carry out the work to complete this myself. The Shower room is just a block shell with no flooring what so ever at the moment. As you step from the kitchen into the shower room there is approx a 12" drop, so I need to install a floor on the same level as the kitchen. I basically wanted to ask you experts how I should go about installing this floor. I intend to fix lengths of timber down either side on the length on the room (76") and then span across the width (44") at various intervals. I intend to use 5"x2" timber to span across the width but would really appreciate any advice initially on what fixings to use to fix the 2 lengths (76") of timber to the block work, how to then fix the joists to these timbers i.e. joist hangers and what distance apart should I fix the joists i.e. 16" centres. I'm obviously putting a shower at the one end of the room using a 1000mm x 700 cast shower base which is rather heavy. Do I need to put the joists closer together under this? What type of flooring would you put on top of the joists, MDF or proper timber floor boards and what thickness would you use. I'll obviously need to know this so that I can fix the joist at the correct height to then take the flooring so that it meets exactly with the kitchen floor. I know there are quite a lot of questions here, and appreciate that you might not know all the answers, but even if you can give me just one answer or point me in the right direction it would be a real help. Many thanks in advance and appreciate the time you've taken to read this post. P.S. I've added the image below of the Shower room as it is now. Please ignore the clutter in there.