A couple of months ago I got a new double wall rear wheel for my bike, and in the time being I had to true the wheel about 20 times due to spokes getting loose. I lost one spoke because it was loose for too long and the wheel even wasn't out of true.
One reason could be that the wheel wasn't built right in the first place and the other one is that, unlike on the single wall rim, the tube is not keeping the nipples in place and they are vulnerable to road vibrations.
When I got the wheel, I noticed some irregularities in true and tension, so I got the mechanic at the shop to fix it for free as it was their responsibility. Afterward, the tension and true looked great and I started riding. Wheel was quickly getting out of true and I noticed that the tension wasn't like it used to be when I got it. That went on for a while. I had to keep truing after every long ride.
I don't know if this is a common occurrence with double wall rims or I got a really cheap wheel, but it's really annoying and the whole reason is because the nipples are not supported by the tube like on the single wall rim.
So are DW rims really that much stronger because there are 2 walls? I mean they could build a single wall that's a bit thicker for the strength and nobody would worry about their spokes loosening. Also you have to buy a rim tape to cover the holes as the regular rim strip doesn't work with double walls.
Is there anything out there to limit the spoke loosening or I need to get a lot more expensive wheel? I might even rebuild my 25 year old single wall rim that came with a bike because even with old and corroded spokes, it served me well for about a year and 1/2.
I really don't see the point of double walls.