Paint/coat to solve stucco problem

nanciann

Please advise on type and product of paint or coating that I should use on the exterior of my 1976 stucco house which has a lot of hairline cracks that leak during water testing?

I would like to keep moisture out of the house. Stucco covers not only the house, a coat also covers the foundation, going below grade to the ground and cement patio. It's unknown as to what extent the stucco coating on the foundation can wick up to the house.

We took off some sheet rock in two bedrooms and discovered rotted barrier paper and wet insulation. The suspected causes were long term water damage from 2 vents and a window, which have now been repaired/replaced. Drylok was painted on the stucco wall from the inside where the rotted barrier paper had been. However we could not seal everything, and some 2x4s remain in direct contact with the exterior stucco.

jsheridan

Hi Nanciann, What you need is an elastomeric coating. Different companies have different products, and I believe SW has two or three, which you can discuss with the paint co for your needs. Be sure to read the link under PDS. You'll learn such things as two coats are required to block wind driven rain, to water"proof" it, and that it's not designed to block hydrostatic pressure, which means it's not spec'd below grade. Below grade would be a job for foundation guys.



http://www.sherwin-williams.com/pain...meric-coating/

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Will22

Cracked stucco needs to be patched, prior to tocpcoating, even with elastomeric coating.