Peter Sedgwick wrote:Japanese pier and beam foundation with mortise and tenon construction
Peter Sedgwick wrote: I feel venting though an outside wall would be most ideal if possible. The snow can sit heavy on the roof in this area of Hokkaido and has a tendency to take out stove pipes when it slides. Snow tore the masonry chimney right off the neighbor's house here last season. Still laying in the front yard. This is an area I would love your advice on a bit later on in the process if possible.
It really all depends on your soil drainage and how susceptible this area will be to water infiltration. A drainage layer is pretty much standard for an on-grade earthen floor to provide a capillary break for any moisture in the ground migrating upwards and could also include drainage pipe in wetter areas. Vapor barrier is particularly helpful if your going to be putting rugs or other objects directly on the floor as these items can block the flow of moisture coming from the ground and possibly cause mold. Pond liner seems a bit overkill to me...
The idea of the pond liner comes from an article I read by Tony Sirna at Dancing Rabbit article link as well as a few other builders who worked in similar clay heavy soil situations. No vapor barrier is necessary even if I am putting an earthen floor directly on the ground?
I was thinking that the pumice stone would create insolation across the whole floor base. I am more than open to other ideas and any suggestions regarding the materials I use and the order and thickness in which they are laid.
Peter Sedgwick wrote:Thanks Gordon for all the links and info. This will keep me busy.
Peter Sedgwick wrote:
1. In this scenario would it work if I use earth bags for my supporting walls for the above described metal top?
(I was thinking to use cinder blocks but they seem too unstable.)
I would stack the earth bags with barbed wire and then cob the inside of the cavity before placing the metal top on, and then cob again over the whole thing. Are earth bags a problem that close to the flu gas chamber if the are covered in cob?
2. How should I approach clean outs for something like this?
3. Would earth bags be an issue against the edge of the raised wooden foundation? I will lay drainage gravel first.
4. Having a hard time finding insolation options here other than foam insulation board. Pumice is proving difficult even though we are on a giant volcano. Any other options?
5. At what layer in the "sandwich" do I add the insolation?
6. Will I still need some drainage gravel on grade if I'm using earth bags?
7. Am I totally nuts?
I will follow the books standard construction for a 6" J-tube configuration using firebricks for the feed tube, burn tunnal, and heat riser. Regular bricks and cob for manifold.
Chimney will go more or less straight out the roof near the peek.
Peter Sedgwick wrote:
After watching videos and researching I feel like the bell bench would be the best option. Not a whole lot of info out there that I can find. Really going on Matt's explanation and the Sundog rebuild video for the construction tips. I've got access to tons of reclaimed cinder blocks. Thinking of using those, filled with cob, for the walls of the chamber then cobbing over and plastering with the same material I use on the floor. Maybe use paving stones for the top of the bench depending on how cheap I can get them. Other option would be to hammer out pieces of drum can like he did in the Sundog video. If anyone has other ideas I'm more than interested.