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Posted by on January 8, 2008, 6:28 pm
I have a 50 year old single story home with stucco on the exterior.
There's been a lot of rain lately. I noticed the southern facing wall
in the garage became wet after a very windy rain day when the wind was
blowing the rain toward the exterior wall.
The garage walls have no interior drywall. I noticed the weather paper
behind the stucco became wet in some areas. One of the beams became
very wet. I did some investigation, the water is not leaking from the
roof, but got in from the side, as the top of the wall is dry.
After the rain has passed. I went outside and noticed some clear wet
path along the exterior drywall, like someone has painted the wall
with water mark. Look closer, and I see that every one of these path,
the drywall has cracked. It's interesting that in areas not cracked,
it looks dry. On the inside, the crack is approximately where the
water has gotten inside and the weather paper becomes wet.
How do I fix this? The crack seems to be too small to be patched by
stucco mix, yet water still finds their way inside. Can I patch it up
with calking? The weather paper is not in its prime conditions, but
fixing it seems to be rather hard, since the beams are in the way...
Thanks!
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Posted by Shelly on January 8, 2008, 6:41 pm
On Tue, 8 Jan 2008 23:28:16 +0000 (UTC), nospam.house@none.com wrote:
>
>I have a 50 year old single story home with stucco on the exterior.
>There's been a lot of rain lately. I noticed the southern facing wall
>in the garage became wet after a very windy rain day when the wind was
>blowing the rain toward the exterior wall.
>
>The garage walls have no interior drywall. I noticed the weather paper
>behind the stucco became wet in some areas. One of the beams became
>very wet. I did some investigation, the water is not leaking from the
>roof, but got in from the side, as the top of the wall is dry.
>
>After the rain has passed. I went outside and noticed some clear wet
>path along the exterior drywall, like someone has painted the wall
>with water mark. Look closer, and I see that every one of these path,
>the drywall has cracked. It's interesting that in areas not cracked,
>it looks dry. On the inside, the crack is approximately where the
>water has gotten inside and the weather paper becomes wet.
>
>How do I fix this? The crack seems to be too small to be patched by
>stucco mix, yet water still finds their way inside. Can I patch it up
>with calking? The weather paper is not in its prime conditions, but
>fixing it seems to be rather hard, since the beams are in the way...
>
>Thanks!
I have successfully used stucco patch many times:
http://www.lowes.com/lowes/lkn?action=productDetail&productId=41327-000000068-10504
hth
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Posted by Mike Paulsen on January 8, 2008, 10:17 pm
nospam.house@none.com wrote:
> I have a 50 year old single story home with stucco on the exterior.
> There's been a lot of rain lately. I noticed the southern facing wall
> in the garage became wet after a very windy rain day when the wind was
> blowing the rain toward the exterior wall.
>
> The garage walls have no interior drywall. I noticed the weather paper
> behind the stucco became wet in some areas. One of the beams became
> very wet. I did some investigation, the water is not leaking from the
> roof, but got in from the side, as the top of the wall is dry.
>
> After the rain has passed. I went outside and noticed some clear wet
> path along the exterior drywall, like someone has painted the wall
> with water mark. Look closer, and I see that every one of these path,
> the drywall has cracked. It's interesting that in areas not cracked,
> it looks dry. On the inside, the crack is approximately where the
> water has gotten inside and the weather paper becomes wet.
>
> How do I fix this? The crack seems to be too small to be patched by
> stucco mix, yet water still finds their way inside. Can I patch it up
> with calking? The weather paper is not in its prime conditions, but
> fixing it seems to be rather hard, since the beams are in the way...
>
> Thanks!
Look into elastomeric paint. You may need some putty-grade for filling
the larger cracks before painting. Be sure to properly prepare the wall,
including applying the recommended primer.
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Posted by Robert Allison on January 8, 2008, 10:22 pm
nospam.house@none.com wrote:
> I have a 50 year old single story home with stucco on the exterior.
> There's been a lot of rain lately. I noticed the southern facing wall
> in the garage became wet after a very windy rain day when the wind was
> blowing the rain toward the exterior wall.
>
> The garage walls have no interior drywall. I noticed the weather paper
> behind the stucco became wet in some areas. One of the beams became
> very wet. I did some investigation, the water is not leaking from the
> roof, but got in from the side, as the top of the wall is dry.
>
> After the rain has passed. I went outside and noticed some clear wet
> path along the exterior drywall, like someone has painted the wall
> with water mark. Look closer, and I see that every one of these path,
> the drywall has cracked. It's interesting that in areas not cracked,
> it looks dry. On the inside, the crack is approximately where the
> water has gotten inside and the weather paper becomes wet.
>
> How do I fix this? The crack seems to be too small to be patched by
> stucco mix, yet water still finds their way inside. Can I patch it up
> with calking? The weather paper is not in its prime conditions, but
> fixing it seems to be rather hard, since the beams are in the way...
>
> Thanks!
For hairline cracks on stucco here are the proper methods to
repair and waterproof:
Truly hairline cracks can be left as they are.
Cracks of 1/16" should be filled with a one part urethane
caulk or equivalent (not silicone). Caulk should be squeezed
into the crack as much as possible and tooled flush with surface.
Cracks greater than 1/16" should be V-grooved with a v groove
masonry grinding wheel, then filled flush with the surface. I
like to use Vulkem 116 for this, but any equivalent caulk will
work.
http://www.tremcosealants.com/commercial/products/product_detail.asp?id=1
When caulk has cured to paintability, paint the entire surface
of the stucco with an elastomeric paint.
http://tinyurl.com/32rvhj
You could use a Siloxane paint, but I prefer the elastomeric.
You should have no more problems with water intrusion. It
helps to power wash stucco before painting, unless it is less
than a year old. Don't blast it, just wash it.
--
Robert Allison
Rimshot, Inc.
Georgetown, TX
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Posted by on January 9, 2008, 5:14 pm
> For hairline cracks on stucco here are the proper methods to
> repair and waterproof:
> Truly hairline cracks can be left as they are.
> Cracks of 1/16" should be filled with a one part urethane
> caulk or equivalent (not silicone). Caulk should be squeezed
> into the crack as much as possible and tooled flush with surface.
> Cracks greater than 1/16" should be V-grooved with a v groove
> masonry grinding wheel, then filled flush with the surface. I
> like to use Vulkem 116 for this, but any equivalent caulk will
> work.
> http://www.tremcosealants.com/commercial/products/product_detail.asp?id=1
Thanks everyone for the suggestions!
While we are on the subject of calking. What type of calking should I
use to repair cracked concrete walkway in the backyard?
I bought some blue-looking ready-mix cement filler stuff at home
depot. It worked for a while but the stuff hardens, and after a year,
the crack widened or moved and it no longer works.
At commercial places, they seem to fill the low spot on concrete joins
(or where they draw the lines ) with a dark paste/rubber like
compound. What is it?
Thanks again!
Raymond
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