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Stucco/stone & water damage - Forno Bravo Forum: The Wood-Fired Oven Community



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Forno Bravo Forum Community,

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
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To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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Stucco/stone & water damage

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  • Stucco/stone & water damage

    I plan to put stucco on the upper walls (over hardiebacker) and stone veneer on the lower walls (over cement block) of my enclosure. I've read about all the flashing, weep screeds, etc. needed for installing stucco & stone on a house (especially here in the North), but are they necessary if the underlying walls are made entirely of metal and masonry products? I realize water vapor can pass through masonry, but does it matter for a WFO? Could freeze/thaw affect the bond between the mortar and block/hardiebacker? And do I need flashing at the stone/stucco junction for any reason, or will the mortar seal it well enough?

    I'm thinking I can mortar the stone directly to the block and put stucco directly on the hardiebacker above that with no flashing, weep holes, etc. I will paint the stucco to seal it. Thoughts?
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  • #2
    Re: Stucco/stone & water damage

    Just some first thoughts: most of the requirements for weep holes vents etc are code for a dwelling wherein people create moisture and they do not want it trapped where it can cause damage. Alot of this code stems from times before vapor barriers were required on the inside of dwellings just beneath or even on the interior surface. What happens is moisture migrates outward thru the walls and condenses on the first cold surface. In some areas of the country, over the course of a winter exterior walls would slowly become filled with ice. I've seen homes outside Fairbanks, Alaska with water running out the bottoms of walls as the ice melts in the spring. Since your lower section (stand) will be open more or less to local conditions on both sides this shouldn't be a problem. It might be worth consideration in the upper section (dome enclosure) to have some sort of venting under the eaves so any water vapor has a way out. As for condensing and forming ice between the Hardie and the stucco I would think it would form on the inside of the Hardie rather than between the two. Alot would depend upon how much water vapor is going to be produced..... are you planning on cooking all your meals all winter long in your WFO? Or perhaps maybe only a half dozen over the course of a winter.

    Hope this helps,


    • #3
      Re: Stucco/stone & water damage

      Thanks Wiley! That makes perfect sense. I did plan to install some vents, so perhaps that will take care of it.
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