My mum has just got a freeview TV for her bedroom and the aerial signal is not good enough from the aerial in the loft, I presume because of the signal not passing through the concrete tiles very well, on her old analogue TV the picture was never up to much either! She has another aerial (on the chimney stack outside) that is connected to her downstairs set up, which includes a freeview STB, so I know this aerial signal is good enough. The outside aerial cable is on the roof and then down the wall and enters the house above her front door. Where the cable goes down the wall this is directly outside her bedroom window, so I was thinking of cutting the cable and putting a splitter in and running a new piece of coax in through the window frame corner. Can you get waterproof splitters any where or will I have to get a suitable box and put an internal splitter in there. I have look at Screwfix, Maplins and RS but cannot seem to find anything suitable.
TIA
John