Acrylic stucco, the kind most commonly used, is applied over polystyrene sheets and fiber mesh netting. Push against the wall with your hand to see whether the surface is pulling away from its ...

This is known as an exterior insulation and finish system (EIFS). An acrylic-polymer coat of stucco is applied onto a base of mesh and foam board insulation.

Hairline cracks are normal with conventional stucco, and stress cracks can occur as homes settle. But the newer acrylic stucco products and crack suppression systems have greatly decreased cracking.

Most newer homes with exterior stucco have an acrylic-polymer finish, which will expand and contract with the weather. This keeps cracks to a minimum and means the stucco can easily last up to 50 ...

In some cases, this might take a month or more. Acrylic stucco requires a six on the pH scale before being painted. Reaching a six on the scale generally requires 30 days of curing.