![]() These range from filling the cracks with stucco-sand elastomeric caulking materials to applying fiberglass mesh, bitumen mesh and base coat.Īt Old Pueblo Stucco L.L.C., we strive to provide dependable stucco crack repairs. Whether the repairs involve a simple application of elastomeric caulk material and stucco finish or a more elaborate application of bitumen mesh and base coat with stucco finish, we’ll get the job done right the first time! Give us a call and we will repair your stucco for you. There are several ways to go about repairing stucco cracks. While following these steps will not insure a crack-free stucco wall, it will make a stucco wall less likely to crack. That’s why the National Wall and Ceiling Bureau (NWCB) and the American Standards for Testing Materials (ASTM) recommend installing control joints so as to break up a stucco wall in panels of 144 square feet. Even earth movement caused by nearby railroad tracks and heavy construction machinery can cause cracks. However, it can also crack due to wind, lumber shrinkage, or foundation settlement. For example, stucco may crack because of structural loads, lateral force racking, or changes in temperature. There are several reasons why stucco can crack. Plaster is a building material used for the protective or decorative coating of walls and ceilings and for moulding and casting decorative elements. As a result, if the stress is transferred and overcomes the strength of the plaster membrane, then the stucco wall can crack. Stucco (plaster) reliefs such as this work at the Chateau de Fontainebleau were hugely influential in Northern Mannerism.A plaster low-relief decorative frieze is above it. Thus, we can’t really compare it with concrete. Cement stucco is a relatively thin, brittle shell over a framed structure. However, stucco cannot be required to meet the American Society for Testing and Materials (ASTM) testing standards of structural concrete or load bearing masonry. Portland cement stucco is similar to concrete in that they both have similar ingredients. ![]() That’s why stucco isn’t a structural material. Unfortunately, this stress can be transferred to the plaster stucco membrane. It’s true that stress affects all buildings. The most common points of stress in a stucco wall are at the corners of window frames, door jambs, and other openings. In fact, it’s entirely possible to fix those annoying stucco cracks.Ī crack in cement plaster is nothing more than stress relief on the stucco membrane. ![]() However, we should not condemn stucco because of tiny, hairline cracks that appear in only a few places. Unfortunately, cracks are a reality in the stucco business. When this is the case, it’s best to consult professionals because a poorly executed repair won’t last and might mask the problem until even more damage is done.We all know how frustrating it can be to find hairline cracks showing up on our stucco wall. This is often caused by improper curing.Īt worst, the walls may be damaged due to moisture infiltration, building settlement, or other environmental factors. Map cracking on a portland cement plaster (stucco) wall. Another reason to recoat a plaster wall is that your building may need a new look, which can be accomplished simply by updating the color. That could be a portland cement-based paint or a slurry of cement and pigments, sometimes call a fog coat. As long as cracks are not too wide so that water passes through them, a new finish treatment can be a quick fix. Even minor cracking can detract from the look of an otherwise good quality wall. Plaster is applied either byhand or machine to exterior and interior wall surfaces in two orthree coats. Pigments should meet the requirements of ASTM C 979, Standard Specification for Pigments for Integrally Colored Concrete.Ī wall that was poorly cured following installation may exhibit minor cracks on the surface. 1 Portland Cement Plaster ( stucco) is a building facing materialconsisting of Portland Cement-based materials and sand, mixedwith water to form a workable mixture. Today’s pigments are compatible with cement-based materials and are durable over the long term. Older plaster surfaces can become worn or faded upon exposure to weather, such as rain, snow, and sunshine. The following methods are recommendations that have been successful on other projects for the repair of plaster (stucco) cracks: Hairline Cracks - Cracks. Portland Cement Based, Water Resistant Exterior Stucco for Scratch and. Repairing portland cement plaster (stucco) around a window ![]() Mix in water just as you did for the first mixture. Mix a new batch of stucco using 23 1/2 pounds of Portland cement, 3 pounds of hydrated lime and 1 1/10 cubic feet of sand. Keep the area moist, rewetting it periodically. Plaster repair is a straightforward procedure that is capable of bringing many stucco surfaces back to good condition. Drag the corner of the trowel through the skim coat to roughen it up and then leave the layer to cure for two days. You don’t want to mask something major by addressing the cosmetics. Before beginning any repair, you should make sure that the walls are structurally sound and that there are no hidden problems. ![]()
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