by swidders »
Mon Jan 19, 2009 7:48 pm
Sounds a bit messy.
Think it would be wiser and safer to put a thin (12mm you say) fillet of timber between the cistern and the wall before you put the screws through, making sure you don't try to overtighten it to the wall. If you want to prevent excessive "wobble" of the cistern, you could put large dollops of silicon (cheap sanitaryware such as no nonsense from screwfix) which will glue it yet allow for some movement. Don't use no-nails or anything that will become dead solid. If you ever did need to remove the cistern in years to come, a blade of some description could be slid behind to slice through and only requires a little top up of silicon to reform the joints when cistern is refilled.
As for the visible gap between the wall and cistern, pack this with tissues and use masking tape while you fill with silicon, smoothing off with a wet tool (finger in surgical glove). The only problem with doing this will be if you need to remove the lid at some point, but again silicon could be sliced off and reformed afterwards.
Sounds like a lot of mucking about I know, but I tend to find that the doughnut washer can be temperamental at the best of times and muck around with this at your peril!!