George 3G

Well everyone, it's in, it's level and it's solid as a rock! Thanks to @Nickfromwales and @Temp for their advice, I couldn't be more grateful!

I just searched through my phone and found this photo from when the tray was test fitted, you can see the second stud sat on the lower stud with red paint on that is now exposed! Panic over! He obviously just sat the Wedi on top of that lower stud instead of cutting that step away and fitting the Wedi board all the way to the floor. Out of interest @Nickfromwales, what would I have had to do if that second stud wasn't there? Your posts above sounded ominous!

The three washers shown are into studding but I'm not sure if there is a second horizontal piece of studding sat above the exposed piece shown in the photo. I've given that whole area of Wedi a push and it moves but only absolutely minutely, no more than it does between the fixings further up the wall.

Actually, it may be plasterboard!

Now I've lifted that part of the floor I can actually get my hand up behind one end of the exposed studding and I can feel a second timber above it.

Thanks both! The plumber indead was a cock, and it's thanks to his mistakes I've had to inherit the job to finish it ready to be tiled! It's good to hear I was right to suggest covering that exposed studding with Wedi 610 and I've done just that, this morning, so thanks both! Would it be a good idea to use Wedi 610 down the three sides of the tray that contact the wall? Or should I stick to using CT1? I have both at home so it doesn't make a difference as far as that goes. Thanks!

Or what if I was to just cover the whole area in Wedi 610 sealant? It says its suitable for using on wood!

Brilliant, thanks both @Tempand @Nickfromwales ! So I think I have one more question before I'm ready to lay the tray. The plumber who carried out the prep work and who has since left the job left this piece of studding at floor level (see photo below), he then boarded the wall with the Wedi board flush to it and then used some Wedi self adhesive joint tape over to cover the joint. Something I wasn't happy about at the time, especially as the shower tray sits against this wall. I have removed the tape this morning as if I am going to leave it like this prior to tiling, I think the fixing screws/washers that the tape sticks over should at least be sealed with Wedi 610 first. You could see the tape lifting off these where it hadn't stuck properly. My question is, is it okay to repeat what he had done? Or is there a better way of preparing it. I really don't want to be altering that piece of studding if possible. Thanks again all!

Another question, what type of plywood should I be using for the bathroom floor? Thanks!

Thanks @Nickfromwales! So my to do list is as follows: Clean back of shower tray to remove any trace of mould release agent Prime Plywood with Ultra Tile Fix Primer Back butter or trowel underside of shower tray Butter Wedi board with CT1 Butter three sides of Wedi board with CT1 Fit Tray into final position Spread displaced CT1 up Wedi board and remove excess on tray with wet wipes Lay Hardie Backer Board to remainder of floor which will have a self leveling screed laid over it by the tiler to level. Have I missed anything please? I also read one of your suggestions in another thread regarding test fitting the waste prior to fitting the tray to count how many turns are required. When I removed the tray off the old sand and cement base the plumber who had attempted to fit it had not only used silicone when Merlyn advise not to but the waste was out of place by about 10mm to the tray, straining the components. I need to check that the waste has not been damaged from this!

Hi Nick, thanks for the concise instructions, I'll do just that! Can you clarify this first paragraph for me please? Are you referring to the CT1 or my suggestion of back buttering / troweling adhesive onto the back of the shower tray? Also from the thread you linked above, when you say "tool displaced sealant" are you advising that when you drop the tray in, any sealant that is squeezed out from between the tray and the wall you spread up the wall with a filler knife or similar? Thanks again @Nickfromwales, I owe you a beer, or three!

Okay great, that's made my life easier and saved me money, thanks! The Ultra TA states it can make up to a 20mm bed too so that will be plenty, I only suggested BAL as I had read good things about them! Should I still back butter or notch the back of the tray? There isn't any wiggle room between the tray and Wedi board on the walls, will this not cause me an issue trying to force CT1 down the gap? Is it not worth at least applying some to the three sides prior to laying the tray, or will this just end up spread down the three Wedi boarded walls? I do also plan to use this sealing kit between the tray and the Wedi board once the tray is in and set: https://www.rubberduckbathrooms.co.uk/abacus-no-more-leaks-4m-shower-and-bath-sealing-kit Thanks again!

Hi all, I'm in the middle of a bathroom renovation and I'm crossing off the last few jobs before the tiler comes. The biggest job left to do is to fit the 1700mm x 760mm Merlyn stone resin shower tray. I've removed the old chipboard floor, added extra noggins to the floor joists for additional strength and laid a new 18mm plywood floor. The bathroom is only 1700mm x 2000mm and there is a steel under the doorway so the floor is pretty rigid but there is a 10mm or so drop across the bathroom floor (over the length of the shower tray). I wanted to make sure my plan for fitting the tray is correct, I've done some searches on here and found some very helpful advice, especially from @Nickfromwales but I just wanted to make sure I hadn't missed any steps in the process. I'm a complete novice and haven't done anything like this before! So as it stands, my plan is: Clean back of shower tray to remove any trace of mould release agent Prime underside of tray with Ultra Tile Fix Primer Prime Plywood with Ultra Tile Fix Primer Lay either Jackoboard or Hardie Backer Board with tile adhesive and screws to tray area of floor in a step form to "bulk out" thick areas of tile adhesive to avoid any adhesive sinkage. Back butter shower tray with 10mm trowel Lay tile adhesive over Jackoboard / Hardie Backer Board with 10mm trowel Fit Tray Lay Hardie Backer Board to remainder of floor which will have a self leveling screed laid over it by the tiler to level. I also want to add some CT1 to the three sides of the tray that contact the Wedi board wall, what is the easiest method of doing this on a tray that is in contact with the wall on three sides? Lastly I plan to use either of these adhesives for fixing of the tray and the Jackoboard / Hardie Backer Board to the plywood floor, is there a preference between the two or can anyone recommend a superior product? I really want to have as much time as possible to ensure the tray is level before it sets. Ultra Tile Fix ProFlex SPES Standard Set Flexible S1 Adhesive White 20kg BAL Flex One Tile Adhesive White 20kg Have I missed anything or are there any tips to help make the process easier for a novice? Any advice will be greatly appreciated, thanks!