Stucco-n You: Preserving and Repairing Old Stucco

Stucco is a cement-based solution applied as a two- or three-part exterior coating. It's primarily used in residential buildings or small commercial structures. Until the late 1800s, the plaster, like a standard mortar mix, was made with lime. But, the rise of Portland cement changed their composition and turned them into a harder variant. Continue reading to learn more.

Revival-Style Architecture

At the start of the 20th century, the introduction of revival-style architecture resulted in the resurgence of demand for stucco. The material was associated with many historic structural designs, including Pueblo, Tudor, Mission, Prairie, Art Deco, and Spanish Colonial.

The plaster has always been popular for a variety of reasons. It's inexpensive and is very versatile. It can simulate the look of finely dressed stonework, especially when lined or scored to create ashlar features. A coating over brick, log, rubble stone, fieldstone, or wood frame can give the structure a more expensive facade than what it really is.

Stucco is also known to have water-repelling capabilities, offering buildings certain protection against wind, rain, and even fire. But, ironically, it can be damaged by water.

Common Problems of a Stucco Exterior

When you own a historic stucco house, you'll probably notice that moisture is the primary cause of deterioration for the building. This often leads to hairline cracks, which can eventually compromise the construction and base foundation of the structure. The surface of the building can erode as well when it's exposed to moisture for an extended period.

There'll also be times you'll notice that the paint doesn't stick to the walls. The dampness of the ground can soak up the stucco and prevent the paint from adhering to the surface. And, of course, if wet patches are present, finding mold, dirt, and mildew won't be surprising.

Additionally, you may notice whole sections of plaster that are bulging or falling off the sides because of excessive amounts of water that entered the masonry behind the coating.

Repairing an Old Stucco Structure

When fixing an old stucco building, one must first determine the points of moisture and quickly attend to them. These could be the shingles or the downspouts. Second, identify what type of material is used. This is to ensure that the repair patch will resemble the old one in color, strength, texture, and composition as close as possible.

Remember that full replacement isn't advisable; don't remove the layer that was originally placed on the building. Repairs should just be patch jobs with the new ones matching the old or remaining stucco. Make sure to purchase a good mortar stucco mix so the remedy will last long. It's also best to contact professional contractors and enlist their services.