[Cob] Mike .. Dome home

[Mike Creedy]

> Hi and good day,
> I hope this is the right place to post for some advice.
> My earthbag dome home is above window height. (Engineer approved by the way). Eaves are in place. Will be wattle (with bamboo) and daubed. I hope... I have ordered an adobe spreader from Nolan. Need the speed and penetration.
> The bags are primarily filled with roadbase and clay soil. I later found a supply of clay based soil (about 25%. Clay) and switched to that. A test brick got rock hard. So I would like to plaster the outside side and inside with a water proof adobe mix. If anybody can recommend a mix that is proven, Please let me know. Research is suggesting a less than 5% addition of Portland cement with the sand and type S lime. Please suggest ratios? North Florida, we get heavy rain and high winds at times.
> As a backup, I am putting two rows of eaves in, at different heights, to enable me to support a sloped Japanese style roof which will completely cover the dome if all else fails. .. (Its 20 ft. dia.) Also, I have cut the top of the dome off and am putting in a 2:12 flat tin roof... Temporary to pass code.
> Eaves and window awnings:
> The eaves extend about 30" out from the building and will be adobe on bamboo with re-bar pounded into the bags for support. The same for the window and door coverings. I assume to use the same mix as the rest of the outside wall?
> Earth floor: compacted roadbase ontop of about 3 to 4" of 11/2" rock. Layers of graded soil (clay or not?) and coated with 4 coats of boiled linseed oil. I see there is some good discussion about flooring here. Please advise regarding putting a plastic covering above the roadbase? I will put some Borax down for termite protection. (Above the roadbase.)
> My website is a year out of date. 
> I appreciate any advice you can offer as this is the most critical stage of construction!
> Many thanks
> Mike
> 
> Floridadomehome.com