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scgrgg

07:19AM | 09/08/09
Member Since: 09/07/09
1 lifetime posts
Bvroofing
I have an exterior stucco siding. The other day it rained quite a bit and we got water in our house. I noticed at the bottom of our stucco wall which sits about 6-8 inches off the foundation that there was a metal "flashing" with holes drilled in and there were also gaps between it and the stuco wall. I sealed it with that foam expanding stuff AND black "tar" sealant in an effort to keep water from getting in the house.

Now I realize I need to take some measures to keep water away but we built a flower bed and now the ground level is significanly closer to the wall than previously. I am not sure I can ever completely keep water from getting to the level of the stuco wall. Additionally, ants were coming in from these gaps in the wall and getting into the house.

?Is it bad that I covered these holes? What damage will that cause? is that worse than getting water in the house?

Help

Picture attached shows where we tarred the metal lathe. For reference the top of the black is the bottom of the wall and then the majority of the black tar is on the foundation and you can see the dirt is about 4 inches from the bottom of the stuco wall
3341-sealing_external_stu

OddBall

11:10AM | 09/12/09
Member Since: 11/10/06
138 lifetime posts
There should be no openings for venting or anything else at that level of siding. If there is another layer of siding under the stucco, it should be flashed properly, then the stucco would need to counter flash this. If that is your only layer of siding, masking tape and a thicker grade of asphalt would dress it up a bit. Cover that entire area all the way around the house. Bury it after, if you have the room. Vent stucco siding at the top of the wall. It will intake from inside the house.

BV000434

04:36PM | 02/23/13
I am not sure your answer is correct. What about weep screed?

Olympus Customs

09:41PM | 02/25/13
Member Since: 02/25/13
1 lifetime posts
First, let me explain stucco veneer system.
In applying the stucco system to a wood frame, you would wrap the area with a house wrap or felt. This helps keep water from enter the structure. Then apply the metal lathe and then the scratch coat (cement mix) and then the final finish coat.
Conventional stucco which I believe you have is similar to a stone veneer in that it absorbs water from the outside (i.e. rain). The stone has weep holes drilled into the bottom of the stone wall to allow water to escape from the back side of the stone. The front side, of course does not need weep holes because it drains down to the ground. Conventional stucco is similar to this method. The weep screed at the bottom is the exit port for the water from behind the stucco cement to drain. If you put the tar at these weep screeds, then you just plugged the water from draining and now you will have further problems down the road.

To get to the reason that you have gotten water into your house is possibly two reasons. (maybe more)

1. The initial installation of the stucco system was done incorrectly or it has failed for some reason down the road.
Most common problems occur because of improper flashing of
windows or pipes extruding from the wall above the leak.
2. The other reasons is the one you touch on in your post.
Drainage water from your yard is getting pushed up the slab into the bottom of the weep screed and getting into your house.
I would as you suggested; redirect the water away from your house. You should have at least 6" of slab exposure. As far as your pest problem, ant poison is the way to go. Plugging up the weep screed holes is not.

Hope this helps,

Pat
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