Rust coming through 100% acrylic Stuccoat

[Shawn Miller]

Our house is 3.5 years old and we are having rust coming through the 100% acrylic Stuccoat stucco. Why would this happen?

[Marc]

Do you know the name of the manufacturer that produced the system used on your house? Some manufacturers use silica sand for texture which sometimes contains iron particles and will rust. What pattern do the rust stains make? Any photo available?

Marc

[Scottpat]

Our house is 3.5 years old and we are having rust coming through the 100% acrylic Stuccoat stucco. Why would this happen?

As Marc said, photos would be helpful.. It could be several things causing it and a photo might help.

[Shawn Miller]

The product is called an elastomeric F-14 Western Stucco products and an Eisenwall crack resistant base coat.

The cracks with rust look like the stucco is leaching. It is rusting on the corners of the house, around some of the windows and then on some of the big wall where the weather really gets to it. I will take some pictures!

Thank you!

Shawn

[Scottpat]

The product is called an elastomeric F-14 Western Stucco products and an Eisenwall crack resistant base coat.

The cracks with rust look like the stucco is leaching. It is rusting on the corners of the house, around some of the windows and then on some of the big wall where the weather really gets to it. I will take some pictures!

Thank you!

Shawn

Sounds like water is seeping in and the wire lath is rusting. Short of tearing it off and replacing all you can do is stop the water and recoat it.

[Shawn Miller]

Is this usual for 3.5 year old high end construction?

[hausdok]

Hell no!

It sounds like the contractor used sub-standard fasteners and lath.

One Team - One Fight!!!

Mike

[kurt]

Is this usual for 3.5 year old high end construction?

Actually, it is sort of "usual". There's a whole lot of "high end construction" stucco that's really messed up.

Several of the engineered claddings don't perform in the manner intended for multiple reasons, almost all having to do with failure caused by moisture.

Personally, I'm not a fan of elastomerics. I can imagine a lot of problems simply because it's an elastomeric. I've never seen one work satisfactorily.

Not to say it can't be done, but I've never seen it done, and I've seen a lot of elastomeric coatings.

[robert1966]

I could agree more sound like lath issues due to faulty or shabby installation. Could be flashing or other penetration problems occurring from above.