• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • Pearl Sutton
  • James Freyr
  • Mike Haasl
  • paul wheaton
  • Dave Burton
  • Joylynn Hardesty
  • Jocelyn Campbell
  • Joseph Lofthouse
garden masters:
  • Carla Burke
  • Steve Thorn
  • Eric Hanson

Cob Rubble Trench Foundation & Water Drainage

Posts: 6
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

Wondering if anyone can give me some advice on an issue with the rubble trench foundations for cob. I'm planning to build a cob house with 3 rooms total. I am a public school teacher so I only have summers off to work, so I'm planning to build one room at a time over the next 3 years. (with some weekend time for minor work) Anyways, here's a simple drawing of what I'm wanting to build with color coding to assist my question...

If I build one room at a time, will it matter if the pink wall areas have drainage pipes laid in the rubble trench since they will ultimately be interior only walls? I do realize that these (pink) walls will be exposed to the exterior for 1 or 2 years before the whole thing is complete and will need drainage to protect the structural integrity of the cob. If I lay in drainage pipes under all the walls (pink and yellow), after all three rooms are built, will it matter that drainage water will be running underneath the (pink) floor walls inside the house?

Anyone with experience have some advice on how to go about this?
Thanks so much!
[Thumbnail for IMG_0680.JPG]
Posts: 684
Location: Richmond, Utah
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi Rose,

You'll probably get a lot of different opinions about this, but I personally only install drainage pipes on the outside perimeter of the structure if at all. I prefer to trench and fill the drainage, sloping away from the home and terminating in a French drain, but in some climates you may need the pipe in order to move large amounts of water.

Check out the raised earth foundations thread for more info.

All Blessings,
He's my best friend. Not yours. Mine. You can have this tiny ad:
Heat your home with the twigs that naturally fall of the trees in your yard
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!