I recently bought a residential building and noticed that the garden fence is not as unclear as it first seemed. As you can see from the picture attached, the lower half is a brick wall, and then there is a small gap before the vertical fence boards, which are on the roadside of the support rails. The panels are separated by just a couple of millimeters, which is enough that when a car drives past, you can see it.
My initial idea was to get another lot of fence boards, stain them to match the color of the existing ones, and nail them up on the support rails' garden side, offsetting the gaps in the new boards so that the two holes don't line up. (Are these gaps inevitable, even if I nail the boards side-by-side, or are deliberate to cope with the expansion?) The new panels would also be about 50mm lower than the existing boards to cover the gap at the brick wall's top.
However, I then worried that people on the roadside could push rubbish between the boards, and it would be trapped (there is a bus stop there) and that any knotholes in the panels (there are a few in the existing fence) might still allow light through.
The main reason for doing this is to stop seeing through the fence, but I assume the three layers of wood would also help to insulate the noise from the road more than currently and more than two.
