I know from experience that any specifics on building wood ovens and grills is appreciated by those collecting ideas for their own build, so upon requests in the comments of previous posts about it, I’m providing drawings and additional information here for those that have requested it. I’ll just keep adding to it as requests come in.
Total Cost: ~$30 + gas to haul the mostly free masonry. Not including my time, of course.
Total Time: 3 hours. From having piles of masonry around the yard to having a fire in the oven, including grill build.
A few key points.
First, the oven entrance is 3 bricks tall, while the oven top is 5, providing very close to the optimal ratio of door height to ‘dome’ height. That ratio was common regardless of which camp the builder fell into. “Yes, 63% is an imperative. Actually it can vary a little, maybe 60 – 65%, but that is what optimizes the exit gases to heat retention. You don’t want 100% because all your heat will go out the flue. Too small of an opening will not allow the combustion gases to flow properly. 63% is optimum.” – lwood @ fornobravo forum.
Second, this build is made possible by the pavers which are roughly 1′x2′x2″ – providing the ability to span the oven walls. Normally ovens are domed, which is better for both heat reflection and strength properties. To achieve a flat structure with some strength, all the pavers that span the oven roof are on edge, not on flat. I’m no engineer, but I figure it’d be far harder to break a paver on edge, and it can likely hold vastly more weight as well. It also provides a foot of thermal mass atop the oven, albeit unsealed between them. Conveniently, the paver roof of the entrance, if built flush with the adjacent bricks, provides for another paver to fit perfectly as a door. Works great.
Lastly, improvisation required. Your building materials may be different than mine or you may have a better idea on how to tackle it – and you’ll need to adapt accordingly.
Various photos of this particular setup will be available here. More to come if need be.