Recent content by robg8950

So as i tap up and down it goes holow then hard is nothing to be worried about.

I am going to be wall mounting my tv in my flat. the walls are all stud. I have done the knock on the wall and marked with a pen. The timbers are 60cm apart with hollow in between. but then when you knock vertically up and down the timbers they also go hard and then hollow. so...