Hi, I have a number of questions about my new project. I am building the ensuite is going in the corner of our bedroom, unfortunately we have a sloping roof, I was going to use low volt spot lights in the sloping part, it states on the instructions that the lights need a 110mm roof void, but the joists are only 75 mm, will this be a problem? Also for the shower i am unsure whether to use an electric or mixer shower, we already have an electric shower down stairs and there doesn't seem to be another space for a shower on the consumer unit. Thanks for any help