You have plenty of room out the front of the oven to build an entry arch at the golden mean of 63%, that may help keep the thing hot, but I doubt it.
The perimeter of the hearth bricks are sitting directly on that HUGE concrete slab and will suck every last kilojoule of heat right out of the sucker.

You know you want to.......so...........pull it down and do it properly.


Unfortunately that same bad design has made its way over here too.

Outdoor Brick Oven, Great for Pizza, Breads and Meats - From Glenthompson Bricks
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