#1  
Old 08-21-2013, 08:11 AM
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Location: Quebec, Canada
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Default Roof finishing for Stone House Oven

Good day,

I am in the process of finishing my oven however, I am puzzled with the roof. My design is a stone house over with a flat roof. I built a metal structure around the dome and put cement board all around, even on the roof. My thought is to continue the sides with the stones I used on the bottom part but my question is;

What can I put on the roof? Do I need to add something so water, snow doesn't leak in the flat part of the roof? What material should I finish the roof with? I was thinking of putting a few slabs of stones.

Any help would be appreciated!

Thanks!
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Old 08-21-2013, 01:04 PM
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Post Re: Roof finishing for Stone House Oven

Cantley
Post some pics if you can, but i would think that sheet metal will be the easiest. You can use the stone on the roof, just use a waterproof membrane underneath the stone and on top of concrete board and leave some weep holes for any accumulated moisture to escape.
You said a "flat roof" i am assuming it would be flat but slope from front to back?

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Old 08-21-2013, 01:34 PM
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Default Re: Roof finishing for Stone House Oven

A true flat roof would be a mistake in your area, to much rain and snow. I agree with tex, you need slope and a waterproof layer below any stone. Metal is a good choice. Aluminum or steel laid in shingle style will work well with a slope of 2/12 or greater pitch.
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Old 08-22-2013, 06:16 AM
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Default Re: Roof finishing for Stone House Oven

Hey Gents,

Thanks for the quick reply. Yes, I need to have a slope from front to back to ensure water doesn't stay trapped on the roof, especially with harsh winters in Quebec.

Do you recommend a waterproof membrane on the side walls as well? I was thinking of laying the stones directly on the concrete board on the side walls, adding a waterproof membrane on the roof and then adding the stone or slabs.

Texman, thanks for the reminder for the weep holes.
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Old 08-22-2013, 06:28 AM
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Default Re: Roof finishing for Stone House Oven

Quote:
Originally Posted by Cantley_Oven View Post
Hey Gents,

Thanks for the quick reply. Yes, I need to have a slope from front to back to ensure water doesn't stay trapped on the roof, especially with harsh winters in Quebec.

Do you recommend a waterproof membrane on the side walls as well? I was thinking of laying the stones directly on the concrete board on the side walls, adding a waterproof membrane on the roof and then adding the stone or slabs.

Texman, thanks for the reminder for the weep holes.
My walls are brick and I mounted directly to the concrete board at the top of my oven but that area is protected by a minimum 2 ft overhang so very unlikely to get wet under any weather conditions. The lower areas are backed with concrete block CMU.
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Old 08-22-2013, 07:17 AM
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Default Re: Roof finishing for Stone House Oven

Sorry for all the questions gents.

Does the oven sides/roof get really hot? Or is the insulation provided with the Forno Bravo kit a good barrier for the heat?
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Old 08-22-2013, 07:42 AM
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Post Re: Roof finishing for Stone House Oven

CO

with 2-3 layers of blanket and maybe some added vermiculite the exterior walls and roof will be about ambient temp. So, no heat problems as long as you insulate properly. Which you want to do to retain all that heat for lots of cooking.

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Old 08-22-2013, 08:35 AM
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Default Re: Roof finishing for Stone House Oven

Quote:
Originally Posted by Cantley_Oven View Post
Sorry for all the questions gents.

Does the oven sides/roof get really hot? Or is the insulation provided with the Forno Bravo kit a good barrier for the heat?
Since you are building a house over the oven I would recommend adding some vermiculite or perlite poured into the house around the oven for additional insulation. It is cheap and with your low temps in Canada you will be able to use your oven more in winter.
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Old 08-27-2013, 09:55 AM
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Default Re: Roof finishing for Stone House Oven

Thanks for the replies Gents.

I had the hardest time finding vermiculite or perlite which I finally did yesterday. I will assemble my enclosure walls this weekend and post some pics.

Getting pretty excited to have this thing done.
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Old 11-07-2013, 06:02 PM
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Location: Cochrane, Alberta
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Default Re: Roof finishing for Stone House Oven

Quote:
Originally Posted by Cantley_Oven View Post
Thanks for the replies Gents.

I had the hardest time finding vermiculite or perlite which I finally did yesterday. I will assemble my enclosure walls this weekend and post some pics.

Getting pretty excited to have this thing done.
Probably a little late for a reply but I found large bags of vermiculite at stores that sell hydroponic supplies, quite cheap as well. I built a house over my dome. Used metal studs then covered them with cement board, a scratch coat and then finally rocked it. The roof is metal, if I were to do it over, I think I'd use copper sheeting for the roof, it would look awesome but is pricey.
I put a minimum of 6" of vermiculite all around the dome. You cannot feel any heat on the side walls anywhere. Last Christmas, I cooked the turkey in the oven. It was -30 C and I had the oven fired up the night before. Still had a heavy bed of coals in the morning and snow on the metal roof.
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