My 3-coat unpainted fairly rough texture stucco is 15 years old and has
a lot of hairline cracks (less than 1/16") which isn't surprising since
I live in earthquake country (Northern California). In one place next
to a window, enough color coat has chipped off so that I can see the
crack goes into the brown coat.

Since I'm worried about water penetration (a neighbor has measured
gusts of 87mph and rain sometimes seems to be horizontal), I'd like to
repair the cracks. After talking with a number of people and doing web
research, I ended up with lots of information but no consensus on how
to do the repair.

I've summarized my findings below and would appreciate comments
regarding pros and cons that are based on actual experience. Thanks in
advance.

There seems to be two general categories of repair, cement/stucco based
and paint based, each with several variations. References are marked
with a number in brackets, e.g. [1] and are given at the bottom.

Remember the below is only for hairline cracks.

1. Cement/stucco based repair

Advantage: Still have low maintenance stucco finish
Disadvantage: Repaired cracks will almost certainly be visible
Options 1.1 and 1.2 are similar but slightly different.

1.1 Mix portland cement or stucco with half-and-half acrylic modifier
and water. Apply with putty knife. Work to match texture. Apply fog
(color/finish) coat afterwards. No need to widen cracks. [1]

1.2 Apply a acrylic multi-bond (green from one vendor), let set 34 to
45 minutes, apply a one-coat stucco matching texture, apply fog coat
after a couple of days. [2]

1.3 A variation of 1.1 and 1.2 is to apply a new fog coat to all the
stucco, not just around the cracks. This "should" make the cracks more
invisible than any other method. I'm not sure how well this will work
over my rough texture. Seems like this might also be a relatively high
cost option. (Can't recall where I heard of this alternative.)

1.4 One stucco person who covered a small addition for me a few years
ago, upon seeing I had some old color coat mix (left over in a bag) and
a stained area of stucco, suggested I could take the stucco mix, add
water, strain, and spray the "colored water" onto the stucco. I wonder
if this would work to make the color uniform after 1.1 or 1.2? Also
this sounds expensive (and a waste) to buy new stucco mix to do this to
the whole house.

2. Paint based repair

Advantage: Finished job will be uniform color, possibly hiding
cracks
Disadvantage: Now have a painted surface to maintain/repaint.

Common: Fill cracks with Elastomeric Sealant (brush grade) or perhaps
latex caulking.
Still need to match texture, given recommended 2" width for
sealant,
so patched cracks might still show through new paint coat.

2.1 Paint with Elastomeric Paint [3]
Advantage: Some stretch to keep very small new cracks from
showing.
Disadvantages: Costs more than regular paint per gallon and much
lower coverage.
Reports it is harder to apply than acrylic latex
paint.
Reports that it creates a vapor barrier which can
cause problems
if moisture gets trapped behind.
Notes: Manufacturers have different recommendations for number of
coats.
Need to monitor application thickness.

2.2 Paint with Acrylic Latex [4]
Advantage: Less expensive, easier to apply. Does not create vapor
barrier
Disadvantages: May not have stretch to cover new cracks.

[1] John J. Bucholtz, "The Consumer's Stucco Handbook" (30 page
pamphlet)
[2] advice from Stucco Supply store
[3] "Kel-Seal Elastomeric System, a Technical Guide to Elastomeric
Applications"
(9 page pamphlet picked up at paint store)
[4] Suggestion from paint store and several news group web postings

http://www.quikrete.com/catalog/StuccoRepair.html

--
Have a Great Week !

Check Winter Haven's Current Weather
http://www.wunderground.com/cgi-bin/...er+Haven+33881
wrote in message
oups.com...
My 3-coat unpainted fairly rough texture stucco is 15 years old and has
a lot of hairline cracks (less than 1/16") which isn't surprising since
I live in earthquake country (Northern California). In one place next
to a window, enough color coat has chipped off so that I can see the
crack goes into the brown coat.

Since I'm worried about water penetration (a neighbor has measured
gusts of 87mph and rain sometimes seems to be horizontal), I'd like to
repair the cracks. After talking with a number of people and doing web
research, I ended up with lots of information but no consensus on how
to do the repair.

I've summarized my findings below and would appreciate comments
regarding pros and cons that are based on actual experience. Thanks in
advance.

There seems to be two general categories of repair, cement/stucco based
and paint based, each with several variations. References are marked
with a number in brackets, e.g. [1] and are given at the bottom.

Remember the below is only for hairline cracks.

1. Cement/stucco based repair

Advantage: Still have low maintenance stucco finish
Disadvantage: Repaired cracks will almost certainly be visible
Options 1.1 and 1.2 are similar but slightly different.

1.1 Mix portland cement or stucco with half-and-half acrylic modifier
and water. Apply with putty knife. Work to match texture. Apply fog
(color/finish) coat afterwards. No need to widen cracks. [1]

1.2 Apply a acrylic multi-bond (green from one vendor), let set 34 to
45 minutes, apply a one-coat stucco matching texture, apply fog coat
after a couple of days. [2]

1.3 A variation of 1.1 and 1.2 is to apply a new fog coat to all the
stucco, not just around the cracks. This "should" make the cracks more
invisible than any other method. I'm not sure how well this will work
over my rough texture. Seems like this might also be a relatively high
cost option. (Can't recall where I heard of this alternative.)

1.4 One stucco person who covered a small addition for me a few years
ago, upon seeing I had some old color coat mix (left over in a bag) and
a stained area of stucco, suggested I could take the stucco mix, add
water, strain, and spray the "colored water" onto the stucco. I wonder
if this would work to make the color uniform after 1.1 or 1.2? Also
this sounds expensive (and a waste) to buy new stucco mix to do this to
the whole house.

2. Paint based repair

Advantage: Finished job will be uniform color, possibly hiding
cracks
Disadvantage: Now have a painted surface to maintain/repaint.

Common: Fill cracks with Elastomeric Sealant (brush grade) or perhaps
latex caulking.
Still need to match texture, given recommended 2" width for
sealant,
so patched cracks might still show through new paint coat.

2.1 Paint with Elastomeric Paint [3]
Advantage: Some stretch to keep very small new cracks from
showing.
Disadvantages: Costs more than regular paint per gallon and much
lower coverage.
Reports it is harder to apply than acrylic latex
paint.
Reports that it creates a vapor barrier which can
cause problems
if moisture gets trapped behind.
Notes: Manufacturers have different recommendations for number of
coats.
Need to monitor application thickness.

2.2 Paint with Acrylic Latex [4]
Advantage: Less expensive, easier to apply. Does not create vapor
barrier
Disadvantages: May not have stretch to cover new cracks.

[1] John J. Bucholtz, "The Consumer's Stucco Handbook" (30 page
pamphlet)
[2] advice from Stucco Supply store
[3] "Kel-Seal Elastomeric System, a Technical Guide to Elastomeric
Applications"
(9 page pamphlet picked up at paint store)
[4] Suggestion from paint store and several news group web postings

I'm no expert but here are a couple observations I've had. Stucco cracks.
Period. It is in fact not a real good outside material due to it's low
permeability but it's used extensively in the West (it's on my house).
I've no experience with just painting it but it seems to me that would
decrease your permeability even further and increase the risk of moisture
damage in the home. I could be wrong on this point, perhaps there are
breathable paints out there but not sure how they'd do sealing cracks. For
cracks around here, I see most people opt for filling them in with mortar
and then color coating them. If you can get a good color match, they
usually don't look too bad when dry but after a rain, you can definitely see
them. The other option would be to color coat the entire house
(expensive!). I'll be watching this thread with interest to see what the
experts have to say.
Cheers,
cc

wrote in message
oups.com...
My 3-coat unpainted fairly rough texture stucco is 15 years old and has
a lot of hairline cracks (less than 1/16") which isn't surprising since
I live in earthquake country (Northern California). In one place next
to a window, enough color coat has chipped off so that I can see the
crack goes into the brown coat.

Since I'm worried about water penetration (a neighbor has measured
gusts of 87mph and rain sometimes seems to be horizontal), I'd like to
repair the cracks. After talking with a number of people and doing web
research, I ended up with lots of information but no consensus on how
to do the repair.

I've summarized my findings below and would appreciate comments
regarding pros and cons that are based on actual experience. Thanks in
advance.

There seems to be two general categories of repair, cement/stucco based
and paint based, each with several variations. References are marked
with a number in brackets, e.g. [1] and are given at the bottom.

Remember the below is only for hairline cracks.

1. Cement/stucco based repair

Advantage: Still have low maintenance stucco finish
Disadvantage: Repaired cracks will almost certainly be visible
Options 1.1 and 1.2 are similar but slightly different.

1.1 Mix portland cement or stucco with half-and-half acrylic modifier
and water. Apply with putty knife. Work to match texture. Apply fog
(color/finish) coat afterwards. No need to widen cracks. [1]

1.2 Apply a acrylic multi-bond (green from one vendor), let set 34 to
45 minutes, apply a one-coat stucco matching texture, apply fog coat
after a couple of days. [2]

1.3 A variation of 1.1 and 1.2 is to apply a new fog coat to all the
stucco, not just around the cracks. This "should" make the cracks more
invisible than any other method. I'm not sure how well this will work
over my rough texture. Seems like this might also be a relatively high
cost option. (Can't recall where I heard of this alternative.)

1.4 One stucco person who covered a small addition for me a few years
ago, upon seeing I had some old color coat mix (left over in a bag) and
a stained area of stucco, suggested I could take the stucco mix, add
water, strain, and spray the "colored water" onto the stucco. I wonder
if this would work to make the color uniform after 1.1 or 1.2? Also
this sounds expensive (and a waste) to buy new stucco mix to do this to
the whole house.

2. Paint based repair

Advantage: Finished job will be uniform color, possibly hiding
cracks
Disadvantage: Now have a painted surface to maintain/repaint.

Common: Fill cracks with Elastomeric Sealant (brush grade) or perhaps
latex caulking.
Still need to match texture, given recommended 2" width for
sealant,
so patched cracks might still show through new paint coat.

2.1 Paint with Elastomeric Paint [3]
Advantage: Some stretch to keep very small new cracks from
showing.
Disadvantages: Costs more than regular paint per gallon and much
lower coverage.
Reports it is harder to apply than acrylic latex
paint.
Reports that it creates a vapor barrier which can
cause problems
if moisture gets trapped behind.
Notes: Manufacturers have different recommendations for number of
coats.
Need to monitor application thickness.

2.2 Paint with Acrylic Latex [4]
Advantage: Less expensive, easier to apply. Does not create vapor
barrier
Disadvantages: May not have stretch to cover new cracks.

[1] John J. Bucholtz, "The Consumer's Stucco Handbook" (30 page
pamphlet)
[2] advice from Stucco Supply store
[3] "Kel-Seal Elastomeric System, a Technical Guide to Elastomeric
Applications"
(9 page pamphlet picked up at paint store)
[4] Suggestion from paint store and several news group web postings

I have had good luck with mixing fine sand, latex house paint (stucco color)
and cementitious patching compound. May not be orthodox but it blends in
very well, even after several years. Used my thumb to press it into hairline
cracks. If the patching compound contains sand, omit the other sand. The
cracks disappeared. Cheap!

I found that, if I used smooth caulking compound, the texture was unlike
stucco and it showed clearly as a patch after a year.

In my experience, practically everybody in California paints their stucco
house. The paint usually lasts about years. It is cheaper and lasts longer
than cementitious remedies. Purists will swear by a cement based treatment.
Painting your house also allows you to change the color of your house.

--
Walter
www.rationality.net
-
wrote in message
oups.com...
My 3-coat unpainted fairly rough texture stucco is 15 years old and has
a lot of hairline cracks (less than 1/16") which isn't surprising since
I live in earthquake country (Northern California). In one place next
to a window, enough color coat has chipped off so that I can see the
crack goes into the brown coat.

Since I'm worried about water penetration (a neighbor has measured
gusts of 87mph and rain sometimes seems to be horizontal), I'd like to
repair the cracks. After talking with a number of people and doing web
research, I ended up with lots of information but no consensus on how
to do the repair.

I've summarized my findings below and would appreciate comments
regarding pros and cons that are based on actual experience. Thanks in
advance.

There seems to be two general categories of repair, cement/stucco based
and paint based, each with several variations. References are marked
with a number in brackets, e.g. [1] and are given at the bottom.

Remember the below is only for hairline cracks.

1. Cement/stucco based repair

Advantage: Still have low maintenance stucco finish
Disadvantage: Repaired cracks will almost certainly be visible
Options 1.1 and 1.2 are similar but slightly different.

1.1 Mix portland cement or stucco with half-and-half acrylic modifier
and water. Apply with putty knife. Work to match texture. Apply fog
(color/finish) coat afterwards. No need to widen cracks. [1]

1.2 Apply a acrylic multi-bond (green from one vendor), let set 34 to
45 minutes, apply a one-coat stucco matching texture, apply fog coat
after a couple of days. [2]

1.3 A variation of 1.1 and 1.2 is to apply a new fog coat to all the
stucco, not just around the cracks. This "should" make the cracks more
invisible than any other method. I'm not sure how well this will work
over my rough texture. Seems like this might also be a relatively high
cost option. (Can't recall where I heard of this alternative.)

1.4 One stucco person who covered a small addition for me a few years
ago, upon seeing I had some old color coat mix (left over in a bag) and
a stained area of stucco, suggested I could take the stucco mix, add
water, strain, and spray the "colored water" onto the stucco. I wonder
if this would work to make the color uniform after 1.1 or 1.2? Also
this sounds expensive (and a waste) to buy new stucco mix to do this to
the whole house.

2. Paint based repair

Advantage: Finished job will be uniform color, possibly hiding
cracks
Disadvantage: Now have a painted surface to maintain/repaint.

Common: Fill cracks with Elastomeric Sealant (brush grade) or perhaps
latex caulking.
Still need to match texture, given recommended 2" width for
sealant,
so patched cracks might still show through new paint coat.

2.1 Paint with Elastomeric Paint [3]
Advantage: Some stretch to keep very small new cracks from
showing.
Disadvantages: Costs more than regular paint per gallon and much
lower coverage.
Reports it is harder to apply than acrylic latex
paint.
Reports that it creates a vapor barrier which can
cause problems
if moisture gets trapped behind.
Notes: Manufacturers have different recommendations for number of
coats.
Need to monitor application thickness.

2.2 Paint with Acrylic Latex [4]
Advantage: Less expensive, easier to apply. Does not create vapor
barrier
Disadvantages: May not have stretch to cover new cracks.

[1] John J. Bucholtz, "The Consumer's Stucco Handbook" (30 page
pamphlet)
[2] advice from Stucco Supply store
[3] "Kel-Seal Elastomeric System, a Technical Guide to Elastomeric
Applications"
(9 page pamphlet picked up at paint store)
[4] Suggestion from paint store and several news group web postings

Thanks for the replies and comments to date.

As of now, I'm leaning towards patching the cracks (exact method TBD,
but probably 1.2 or maybe the quikrete mentioned in one reply) and then
applying a fog coat. A fog coat is stucco without sand and can be
sprayed on; I'll bet a special sprayer is required. I'm sure it can
also be rolled on.

Today I ran across a web page for a company that specializes in fog
coating. I don't know anything about them and they are at the other
end of California from where I live but they do have a nice web page
that explains (and of course strongly pushes) fog coating. There is
even a nice video that shows their process. http://www.fogcoat.com/

wrote:
My 3-coat unpainted fairly rough texture stucco is 15 years old and has
a lot of hairline cracks (less than 1/16") which isn't surprising since
I live in earthquake country (Northern California). In one place next
to a window, enough color coat has chipped off so that I can see the
crack goes into the brown coat.

Since I'm worried about water penetration (a neighbor has measured
gusts of 87mph and rain sometimes seems to be horizontal), I'd like to
repair the cracks. After talking with a number of people and doing web
research, I ended up with lots of information but no consensus on how
to do the repair.

I've summarized my findings below and would appreciate comments
regarding pros and cons that are based on actual experience. Thanks in
advance.

There seems to be two general categories of repair, cement/stucco based
and paint based, each with several variations. References are marked
with a number in brackets, e.g. [1] and are given at the bottom.

Remember the below is only for hairline cracks.

1. Cement/stucco based repair

Advantage: Still have low maintenance stucco finish
Disadvantage: Repaired cracks will almost certainly be visible
Options 1.1 and 1.2 are similar but slightly different.

1.1 Mix portland cement or stucco with half-and-half acrylic modifier
and water. Apply with putty knife. Work to match texture. Apply fog
(color/finish) coat afterwards. No need to widen cracks. [1]

1.2 Apply a acrylic multi-bond (green from one vendor), let set 34 to
45 minutes, apply a one-coat stucco matching texture, apply fog coat
after a couple of days. [2]

1.3 A variation of 1.1 and 1.2 is to apply a new fog coat to all the
stucco, not just around the cracks. This "should" make the cracks more
invisible than any other method. I'm not sure how well this will work
over my rough texture. Seems like this might also be a relatively high
cost option. (Can't recall where I heard of this alternative.)

1.4 One stucco person who covered a small addition for me a few years
ago, upon seeing I had some old color coat mix (left over in a bag) and
a stained area of stucco, suggested I could take the stucco mix, add
water, strain, and spray the "colored water" onto the stucco. I wonder
if this would work to make the color uniform after 1.1 or 1.2? Also
this sounds expensive (and a waste) to buy new stucco mix to do this to
the whole house.

2. Paint based repair

Advantage: Finished job will be uniform color, possibly hiding
cracks
Disadvantage: Now have a painted surface to maintain/repaint.

Common: Fill cracks with Elastomeric Sealant (brush grade) or perhaps
latex caulking.
Still need to match texture, given recommended 2" width for
sealant,
so patched cracks might still show through new paint coat.

2.1 Paint with Elastomeric Paint [3]
Advantage: Some stretch to keep very small new cracks from
showing.
Disadvantages: Costs more than regular paint per gallon and much
lower coverage.
Reports it is harder to apply than acrylic latex
paint.
Reports that it creates a vapor barrier which can
cause problems
if moisture gets trapped behind.
Notes: Manufacturers have different recommendations for number of
coats.
Need to monitor application thickness.

2.2 Paint with Acrylic Latex [4]
Advantage: Less expensive, easier to apply. Does not create vapor
barrier
Disadvantages: May not have stretch to cover new cracks.

[1] John J. Bucholtz, "The Consumer's Stucco Handbook" (30 page
pamphlet)
[2] advice from Stucco Supply store
[3] "Kel-Seal Elastomeric System, a Technical Guide to Elastomeric
Applications"
(9 page pamphlet picked up at paint store)
[4] Suggestion from paint store and several news group web postings