accidentally coated inside 36" brick dome with high heat mortar cement

[david s]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

I coat the inside of my ovens deliberately to produce a nice white surface. Pottery kilns are also frequently coated in this way too and they are fired way higher than we do. I don't think refractory mortar would be a good material though because the aggregate in it is way too course. I have never had flaking problems but the stuff needs to be applied to the surface when it is neither too damp or too dry.

[eprante]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

Good job fixing the mistake

[flipjoe26]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

Iwood your location says Philippines what part?
i grew up in ILOILO, now living here in fremont.

[flipjoe26]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

done removing the mortar, now inside the dome has this rustic look
not totally clean but tried my best, gaps are all filled for sure
no more accidents for now
again guys thank you
jp

[lwood]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

Glad to here... btw we are also from the Bay Area (San Jose).

[lwood]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

Just a suggestion, Since the dome is not cured yet; you might try lighting a small fire and see if you can get it to micro-crack. If it were cured, I'd say build the biggest fire you can and make it fail. Then try to remove it with a metal brush.

[DaveW]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

I'm glad it's coming off easily. I used a sand form to finish off my dome and it sucked the moisture out of the mortar. After a day I dropped the sand and the mortar was hard as a rock. I ended up spending a few hours with a pneumatic chisel removing the residue. Good thing you didn't wait until it fully cured.
dave

[flipjoe26]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

i am working now on taking off most of the coating that was applied accidentally, not a very easy thing to do, its sunny 70 degrees here in the bay area, inside the dome staying cool so far, its looking great, mortar peels off easy
bought some brick/driveway stain cleaner solution from home depot, hoping this cleaner will take some of the stains of the brick when done scraping off all the mortar
again guys thanks for all the response
jp

[eprante]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

I am with Dino, I would chip it off. If you havent fired the oven it should be fairly easy. I think it will probably flake off when you start heat cycling anyway.
Eric

[tfasz]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

Yes sorry to hear that, but I would lean towards seeing if you can take it off now. Not sure what mortar you are using, but I was surprised how I could clean stray HeatStop 50 mortar off the outside of my bricks a couple of weeks after I had mortared them. I just dampened them with a sponge, did a little scraping with a trowel, and some more rubbing with the sponge and it can off pretty easily.

[Dino_Pizza]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

Sorry about your oven accident jp.

This is just my opinion, (and pay no attention to anything under my avatar that says Master Builder, cuz I aint) but cladding on the INSIDE of an oven is so non-standard that I think you should chip off as much as possible, even if it dings your bricks a bit. I would think it would tend to flake and come off even if your uncle did a good job of applying it. Again, since I've not seen it happen before, I would rather remove it, not really knowing the outcome.

You could also chip the top, then the sides and leave a few inches near the soldier or bottom courses and if they flake off, they just fall into the ashes.

Just my 2 unprofessional-cents, good luck, Dino

[flipjoe26]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

definitely want no cement flakes, a good amount of cement was coated as i was checking it again this morning.
should i leave it ALONE and cure it in a week?
or should i go ahead and scrape off as much mortar as i can NOW before curing the dome?
or can i take the mortar off after curing the dome?
thanks again guys

[lwood]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

Yes, flaking. Thin layers of cement tend to delaminate easily. Don't know about heat stop, but you don't want flakes of cement falling on your pizza.

[Johnny the oven man]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

I think the reason you see all that nice brickwork on the inside of ovens is the non requirement of any residual mortar, it may work OK, just keep your eye on any flaking.

[flipjoe26]

Re: accidentally coated inside 36" brick dome with high heat mortar cement

its does not really bother me, thanks for the reply