gapwalls
I have installed a new balustrade for my stair and the half wall it is attached to is not straight. Leading up from the floor, it curves away from the wood so that it is about a 3/8" gap at the top – see image below. The half wall is USA 2×4 / drywall construction.
Please can anyone suggest the best way to close the gap?
Thanks in advance.
The safest approach is to actually cut the wall open and see what you are really dealing with. While it involves drywall repair and paint, it also doesn't involve heavy fragile expensive items being hung based on conjecture. While the wall could be brick, it could also be studs (steel or wood) with resilient channel (somewhat age of building and local building practices dependent) - one of the features of resilient channel is better sound isolation, which is good for a party (common) wall. But some places a party wall is nearly always going to be 18" or more of masonry for fire purposes.
The wall shown here uses resilient channel, which is what I was looking for an image of, but also some other techniques that may well not apply.
You may find that you can "see" the resilient channel (or furring, as it may also be) better changing the studfinder direction (turn it 90 degrees, and sweep up and down)
Just in case this helps anyone, I spoke to the people at the tile shop and they recommended building the wall out using cement based tile adhesive (the type you buy as powder and mix). I did this and it worked well. You have to work fast though, that stuff dries very quickly!
Best Answer
Just wrap a small encasement around the board and last couple inches of wall. Three boards finished to match the rails. I doubt you would even need to do 45s, just drop the side boards from the top board by cutting it longer than the wall is wide/thick by twice the thickness of a side board.