Avicularia sling question

[atmosphere]

Just curious ,will they molt before they have built a tube web ? Or will they only molt when they have built one.

 

[SpiderTwin]

All of my Avic's have always built a web to molt in or on. They have never molted on the substrate. That is usually an indicator for me, when the T starts building its web back up, it's getting close to a molt.