One could argue there are less seams/holes with a clam shell design. As noted, clamshell does not mean "no holes"...so they must be maintained as any camper.
You might also infer that I if they do leak any moisture can be trapped inside the walls which are not easily accessible as other types of construction.
My opinion is both NL and BF are high quality units and are probably less likely to leak than other types of construction. If we did not need the room of a slide out we would likely own one of these right now.
DW really like the NL's last time we were TC shopping. Who knows? Maybe when we are just "2" (plus dog) we will look again...
Right now really happy with our current unit...and the added room of a slide.
B
