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Old 02-24-2013, 01:37 AM
Serf
 
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Location: Australia
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Default Wet Oven Floor

Hi

The heavy rain two weeks ago managed to get past ( under ) my oven door and the floor is now very very wet. The rain was driven by strong wind from the North which is very rare here.

So , a fan and blower heater have dried out most of the base. The ash in the expansion gap between the base and the dome is still damp.

Still too wet to fire up.

Has anyone encountered this before and how did you solve it?


BC

Last edited by ShuttleAU; 02-24-2013 at 01:38 AM. Reason: Typo
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Old 02-24-2013, 02:33 AM
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Location: Adelaide, South Australia
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Thumbs up Re: Wet Oven Floor

There is no quick easy solution to dry out your oven and mainly hearth.
I have experienced a similar dilemma as my pompeii is built into a retained plot, and the hearth got wet a few times.
I had several pizza bakes but the oven was very slow to get to temperatures and I had to dig deeper around the base, protect the hearth with plastic and drainage pipes and backfilled with rock.
To get the oven going again, we had to dry out the hearth with a few fires just to get the heat back into the bricks.
Have a few smaller burns and try to guard the oven from further wet weather problems.

Cheers,

Neill
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Old 02-24-2013, 12:27 PM
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Default Re: Wet Oven Floor

Quote:
Originally Posted by ShuttleAU View Post
Hi

The heavy rain two weeks ago managed to get past ( under ) my oven door and the floor is now very very wet. The rain was driven by strong wind from the North which is very rare here.

So , a fan and blower heater have dried out most of the base. The ash in the expansion gap between the base and the dome is still damp.

Still too wet to fire up.

Has anyone encountered this before and how did you solve it?


BC
Hi BC,

What you should do, is fire it up. The wet hearth will not cause cracks in your structure, and its going to take a very long time to dry your hearth insulation. When it happened to me, I had no idea, that the hearth was wet, until I fired it up after clearing the dome, cleaned it out to prepare for baking, closed the door for saturation and upon opening it up, to be amazed at the steam pouring out. My landing is all fire brick and they soak up water like a sieve. So I end up sealing my landing and exposed arch entrance with sodium silicate. After a year, so far no problems.

Last edited by Laurentius; 02-24-2013 at 12:30 PM.
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Old 02-24-2013, 12:40 PM
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Default Re: Wet Oven Floor

At least one member has reported severe damage to his oven floor which did explode, so fire it slowly. You shouldn't have to go right back to the tiny original curing fires, just don't have a roaring inferno, but a few really long gentle fires and your oven should be back to normal.
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Old 02-24-2013, 12:53 PM
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Default Re: Wet Oven Floor

Quote:
Originally Posted by david s View Post
At least one member has reported severe damage to his oven floor which did explode, so fire it slowly. You shouldn't have to go right back to the tiny original curing fires, just don't have a roaring inferno, but a few really long gentle fires and your oven should be back to normal.
David,

I think the person with the damaged floor did not have fire bricks as his flooring,
fire bricks are too porous for explosive pressure to build up.
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Old 02-24-2013, 02:26 PM
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Default Re: Wet Oven Floor

I'm not sure what his floor was made from. It could be useful to do a search. Not all firebricks are really porous. I tested mine, which are really dense and they came out exactly the same as the solid reds I have. Being porous helps water to escape more safely but also means they suck up more water. I certainly wouldn't chance a big fire on them if they were really wet.

Last edited by david s; 02-24-2013 at 02:53 PM.
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Old 02-24-2013, 08:13 PM
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Default Re: Wet Oven Floor

Gudday
It's not only that they are porous that causes the all problem. You have to remember the gapes between each brick, it's a straight pathway to your hearth insulation.
Osmosis sucks!
Regards Dave
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Old 02-27-2013, 09:28 PM
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Default Re: Wet Oven Floor

My sympathies. I know the trouble, my 1st experience maybe 3 yrs ago was very similar but 3 days of wind driven rain from the south. Wicked all the way up the dome. The first 3 days I had to continually monitor even the smallest fire or it would simply go out. On day 3 I was able to get up to a mid sized fire, after 4-5 hrs I had water dripping from the underside of all 4 edges of my surround ledge of the support slap. Continued the fires daily for 2 wks before the oven fire "normally" again, with days 4,5,6 having an actual stream of water coming from all 4 side.
At that point I took drastic agction and convered my already well insulate and tiled igloo with a waterproofing membrain,mor insulation, surface bonding cement and vietnamese river stone. Dome is fatastically sealed but those damned southern wind driven rains have gotten me twice since, but only the underhearth getting wet, Takes about 3 days each time
to dry it out. I have started building a monster file the day before rain is to move in,then /hellacious fire after the rains ended

Good luck
RT
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Old 02-27-2013, 09:33 PM
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Default Re: Wet Oven Floor

Why arent you guys building a weep hole in at insulation level to drain any water?

Ive got one built into mine.
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Old 04-01-2013, 06:51 PM
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Location: Canberra, Australia
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Default Re: Wet Oven Floor

Quote:
Originally Posted by brickie in oz View Post
Why arent you guys building a weep hole in at insulation level to drain any water?

Ive got one built into mine.
Hey Brickie,

Any links to plans on how to do this - or can you provide a quick summary? I'm just about to lay my insulating floor (vermic/concrete)

Dan
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