materials, advice for fixing earth-berm roof?

What are they? Let's say the roof starts leaking. Removing the roof would prove to be a monumental and time/labor intensive task so they isn't feasible, at least short term.

sub'd for good question

All the more reason for taking special care when putting the roof down in the first place. Watch workers like a hawk that they dont cut the polyethylene with shovels, rakes (NEVER move earth around on the roof with the tines down on a rake). I'm now recommending EPDM (artificial rubber) for the first (bottom)layer on the roof. The polyethylene on the origonial $50 house has never leaked through, incidentally. It has leaked where I improperly (no glue) joined that poly with the poly on the $500 addition. Also where the poly surfaced at the extreme upper edge of the roof (needed capping) and where the girder extended into uphill patio (draped poly over that extention to keep water from dribbling down it into house.) Other than these and taking earth off and redoing I can only suggest a top layer of poly or metal roofing and use it to catch water for a cistern. (Devon Olsen, what does sub'd mean?)-- MO

sorry for the confusing terminology, sub'd means subscribed, or watching the thread

and good to hear from you mike on the topic, keep an eye on them workers!