Stucco building repair
Revised from the initial report prepared by Mary L. The illusion of masonry joints was sometimes enhanced by a thin line of white lime putty, graphite, or some other pigment. Oil-based, or alkyd paints must be applied only to dry walls; new stucco must cure up to a year before it can be painted with oil-based paint. The new addition on the right is stucco scored to imitate the limestone of the historic building on the left. Cutting out the old stucco at a diagonal angle may also help secure the bond between the new and the old stucco. Stucco was also marbled or marbleized—stained to look like stone by diluting oil of vitriol sulfuric acid with water, and mixing this with a yellow ochre, or another color. No longer used just as a coating for a substantial material like masonry or log, stucco could now be applied over wood or metal lath attached to a light wood frame. The appearance of much stucco was determined by the color of the sand—or sometimes burnt clay, used in the mix, but often stucco was also tinted with natural pigments, or the surface whitewashed or color-washed after stuccoing was completed. Once water is able to breach the coating, whether through an opening in the stucco itself or from beneath its surface, fragile stucco can begin to buckle and crumble. It is best to let the stucco test samples weather as long as possible—ideally one year, or at least through a change of seasons, in order to study the durability of the mix and its compatibility with the existing stucco, as well as the weathering of the tint if the building will not be painted and color match is an important factor.
Making the choice to patch or completely repair a authenticity is of a concern regarding a historic building.
The new stucco repair should bond to the masonry substrate appropriately without mesh. At first glance, the seamless coat of stucco on the East Boston house looked as But when big cracks or blisters appear, the time to make repairs is right away.
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In some cases, especially in a highly visible location, it may be preferable to restucco an entire wall section or feature.
In some parts of the United States CaliforniaNevadaArizonaNew Mexico and Floridastucco is the predominant exterior for both residential and commercial construction. Analysis of the historic stucco will provide useful information on its primary ingredients and their proportions, and will help to ensure that the new replacement stucco will duplicate the old in strength, composition, color and texture as closely as possible.
Identifying the Stucco Type Analysis of the historic stucco will provide useful information on its primary ingredients and their proportions, and will help to ensure that the new replacement stucco will duplicate the old in strength, composition, color and texture as closely as possible.
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However, it may not work for small patches conspicuously located on a primary elevation, where color differences will be especially noticeable. Today's stucco manufacturers offer a very wide range of colors that can be mixed integrally in the finish coat. The introduction of the many revival styles of architecture around the turn of the twentieth century, combined with the improvement and increased availability of portland cement resulted in a "craze" for stucco as a building material in the United States.
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Before beginning any stucco repair, an assessment of the stucco. EIFS-Dryvit-Sto-BASF-Senergy, Stucco, Plaster, Interior-Exterior, Commercial & Residential, New From sign wall repair to complete building re-face projects.
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The same basic mix was used for all coats, but the finish coat generally contained more lime than the undercoats. Successfully combining pigments in the dry stucco mix prepared for the finish coat requires considerable skill.
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A skilled professional plasterer will be familiar with the properties of materials involved in stucco repair and will be able to avoid some of the pitfalls that would hinder someone less experienced. Care should be taken that repairs made include similar ingredients that are clean and free of oils.
Waxes, fats and oils were included to introduce water-repellent properties, sugary materials reduced the amount of water needed and slowed down the setting time, and alcohol acted as an air entrainer.
It can be adapted from a standard traditional mix of the period, or based on one of the mixes included here. Before beginning any stucco repair, an assessment of the stucco should be undertaken to determine the extent of the damage, and how much must be replaced or repaired.
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|However, a bonding agent may be useful when repairing hairline cracks, or when dealing with substrates that do not offer a good bonding surface.
However, unless authentic, period restoration is required, it may not be worthwhile, nor in many instances possible, to attempt to duplicate all of the ingredients particularly some of the additivesin creating the new stucco mortar.
Stucco is used to form a semi-plastic extension of the real architecture that merges into the painted architecture. Limewash or cement-based paint, latex paint, or oil-based paint are appropriate coatings for stucco buildings.
Generally, the color obtained by hand-mixing these ingredients will provide a sufficiently close match to cover an entire wall or an area distinct enough from the rest of the structure that the color differences will not be obvious.
In other projects Wikimedia Commons. Sometimes additives such as acrylics and glass fibers are added to improve the structural properties of the stucco.