Hi, I have a styrofoam foundation on my house and on one wall there is
a walkway outside at the same height as the basement floor. About 7
feet below the normal grade. The outer wall of the styrofoam
foundation has stucco on it and there is a gap of about 1/4-1/2 inch
between the bottom edge of the stucco and the outside walkway sidewalk
slab. I'm having a problem with water getting into my basement when it
rains. Any ideas on how to seal it up would be appreciated. Thanks.
Firs, you don't have a Styrofoam wall. You have either a wood, block or
concrete wall insulated with Styrofoam.
You can use caulk, roofing cement, blacktop patch, or any number of things
to direct the water away. Would be best to have a little bevel.
Really? There have been maybe six houses built from foam. There have been
hundreds of thousands built with a solid structure and foam insulation on
the outside. www.polysteel.com www.dryvit.com
But he could have one of those foam houses. Some were geodesic domes.
Thanks! Ok, so let's say I go with the roofing cement since I'm
familiar with that. Would it be ok to just go about 6 inches up the
stucco and about 6 inches out on the concrete sidewalk and fill
everything in between with the roofing cement? Or do I need to let
anything breathe in there? I've heard that stucco isn't really that
waterproof and that is why it has the tarpaper with the chicken wire
underneath it. The tarpaper keeps the water that seeps through the
stucco away from the plywood, framing, etc. that is underneath. Maybe
I heard wrong though, I don't know. Stucco isn't my thing. I just
don't know if I'd be making a bigger problem by sealing it up that way
or if there is a better way.
If the stucco is in good shape with no cracks, breaks, holes, etc. Is
there any reason I'd need to break the lower few inches out to get to
the tarpaper layer to put flashing or something else in there?
here are some examples of what I am talking about. I think there are
about a dozen or so different manufacturers, each with their own
design. Basically you put up the foam and the rebar and pour the
concrete inside the foam.
insulated concrete form
Actually, there are about 50 manufacturers of ICFs. My company does work
for five of them
But, they are not foam walls. They are concrete wall, with foam lining both
the interior and exterior to provide superior insulation, good sound
proofing, and huge energy savings. Not to mention hurricane and tornado
resistance. If I was building a house today, that is what I'd use and save
40% or more on heating bills.
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