How long is decay?

So I was gone for a week. A large base, about 40 thralls and several teleport/sorcery buildings are gone.

A week. Funcom used to extend it over the Summer but I guess not.

default on officials is 240hrs, aka 10 days. their servers are far too laggy to support keeping all the builds if no one cba to log in atleast once every week and a half

Not exactly. It’s 240-some hours if it’s built out. My purge base is a small building and maxes out at something like 168hrs.