Flashing sill of rock veneer foundation
user-144543
| Posted in Construction Techniques on
I am building a house that will have an 8″ block foundation covered with stone veneer. the siding will be fiber cement shakes. Do I need to flash at the lowest point of the siding? Can I cut the tops of the stone veneer where it meets the siding so it makes like a drip cap/sill in leu of using a premanufactured masonry drip cap/sill? I’d like not to use a tansition band along the bottom of the house between the siding and foundation. Any thoughts?
Jon
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Greetings Jon S,
This post, in response to your question, will bump the thread through the 'recent discussion' listing again.
Perhaps it will catch someone's attention that can help you with advice.
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bump
"When we build, let us think that we build forever. Let it not be for present delight nor for present use alone." --John Ruskin Laminate is just a picture of hardwood printed on countertop for your floor.We can imagine something that only exists in our heads, in a form that has no measurable, tangible reality, and make it actually occur in the real world. Where there was nothing, now there is something.
Forrest - makin' magic every day
bump
"When we build, let us think that we build forever. Let it not be for present delight nor for present use alone." --John Ruskin Laminate is just a picture of hardwood printed on countertop for your floor.We can imagine something that only exists in our heads, in a form that has no measurable, tangible reality, and make it actually occur in the real world. Where there was nothing, now there is something.
Forrest - makin' magic every day
It's a good question.be bumpy
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I may not have the right answers on this, only a comment or two from my own experience.
A copper flashing would be nice, partly to provide a barrier against carpenter ants, termites or other such vermin and pests, but I know that is gettting expensive.
I restore the older houses which have something in the neighborhood of an 8x12 beam for sills. When we re build foundations under them we will have an eight inch wall up to grade and then finish off with 4" block set back so the stone or brick veneer can fit in there. We have not found a flshing necessary because the predominante style here is to have a waterboard topped with a water table, then the siding. Waterboard would look like a painted baseboard only on the exterior. Water table is like the sill of a window hanging out over the base and fitting under the siding. We leave it down below the sill half an inch or so.
From your description, I would assume that yopu could run your starter course of siding a bit lower than the sill to keep water shedding, IF the stone veneer is dressed smoothly enough at the top.
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I fabricate a lot of copper flashings for this situation. Sometimes the customer wants to show several inches of copper, others want the facing edge as small as possible (1/2" or so).
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I like to flash this common veneer detail with a flexible flashing (18” moist stop, or felt paper) that goes up a couple of inches behind the lowest piece of siding and is brought out over the masonry below the rowlock like a typical masonry under window flashing detail. I put a wood water-table over the flexible membrane and metal head-flash the siding over the water-table, and the siding laps the metal.
This will allow you to use either rock, brick, or a pre-cast rowlock to help shed the water from the siding out over the masonry. The main flashing is the metal head flashing with the moist-stop as a backup flashing. I like to use ¼” down/ 5/8” or ½” back/ 1-1/2”+ up, or similar, metal head-flashing. (aka “Z” flashing) The bottom short edge goes tight to the water-table
The water-table is usually cut from 2/6 treated pine split in half on a 15 deg bevel and nailed on with galvanized 16 finish nails to create runoff. (or 2/4, 2/6 is wider and works better but is a little harder to nail, it has to be toe-nailed from the top) It is important to use metal flashing that will not come out completely over the water table as it could leave a sharp edge exposed at a height that could cut someone (children) if they happened to brush up against it.
Like I said, this is really a pretty typical detail for wainscoted veneers. You might find a typical detail drawing if you’re lucky. There are other methods of flashing this but watch out for exposed sharp edges.
That's my thought on it.