![]() ![]() Dryingshrinkage cracks are often caused by violating the rules ofcontrol joint spacing (ASTM C 1063): Each continuous vertical area should be no more than m2(144 ft2). Water that getsbehind the Plaster can cause woodlath to rot and metal lath and nailsto rust, and can cause Plaster todelaminate from the in Plaster is usuallyshrinkage-related or the result ofexternal loads, such as groundsettlement or inadequate stiffness of the backing.Ĥ Common causes of cracking are improperly placed control joints, improper lathinstallation, and inadequate joints are provided in Plaster to relieve drying shrinkagestresses and to provide stress relief in areas subjected tomovement, such as window and door openings. In manycases, damage results from waterinfiltration into the buildingstructure either through cracks,through the roof, aroundchimneys, or through window anddoor openings. Portland Cement Plaster is often applied to metal lath attached to frame of Portland Cement Plaster ( stucco ) Causes of PlasterDamagePortland Cement Plaster can deteri-orate for a variety of reasons,including inadequate designdetails, poor installation, or the useof improper materials. ![]() Thispublication does not address synthetic Plaster (EIFS) systems.ģ 2001 Portland Cement AssociationIS526 All rights reservedIntegrating patches into the existing Plaster is oneof the many challenges of Plaster Repair. Thismanual presents recommended procedures forrepairing Portland Cement Plaster. Although Cement Plaster provides ahard, durable cladding, it is not intended toresist building movements, such as those fromsettlement or the expansion of wood framemembers as a result of moisture intrusion. Plaster has proved to be a durable wall covering in allclimates and has great appeal as a surface finish because of itsutility, low first cost, and need for minimal like all building materials, Plaster deteriorates with age andexposure to the elements. Portland Cement Plaster has many qualities that make it a desirablefacing material, including hardness, fire resistance, and attractiveappearance. The first coat is oftenreferred to as the scratch coat, the second is the brown coat, andthe third is the finish coat (Fig.)Ģ 1). When applied to metal lath, three coats of plasterform a 22-mm (7/8-in.) total thickness. Applied directly to concrete or masonry, Plaster provides atough, 13-mm (1/2-in.) thick facing that is integrally bonded tothe substrate. It may be applied directly to a solid base, such asmasonry or concrete walls, or it can be applied to metal lathattached to frame construction, masonry, or concrete construction. Plaster is applied either byhand or machine to exterior and interior wall surfaces in two orthree coats. We’re eager to discuss your project! Contact us for a free estimate.Įxplore Courts Building Systems case studies and client testimonials.1 Portland Cement Plaster ( stucco ) is a building facing materialconsisting of Portland Cement -based materials and sand, mixedwith water to form a workable mixture. Applied in two to three coats, cement plaster forms a tough 1/2”-7/8” thick facing. Stucco may be applied directly to a solid base such as masonry applied to concrete walls such as foundations or applied to metal lath attached to frame construction. It consists of portland cement-based materials and sand mixed with water to form a workable plaster that hardens to provide a strong, durable, and tough surface. ![]() Traditional portland cement plaster, commonly known as stucco, is a time-tested exterior finish. Traditional veneer plaster can be as thick as 1/2” modern veneers are 1/16” – 3/16”. Veneer Plaster starts with a specialized gypsum base similar to drywall, a thin veneer of base coat, plaster and/or finish plasters are then applied over the gypsum base. Damaged moldings can still be repaired or reproduced as necessary. Custom plaster moldings are commonly seen in historic homes and buildings. Veneer plaster is typically used for interior walls and ceilings. Veneer Plaster is used in historical renovations or as an upgrade from standard drywall. Cement plaster for foundations or retaining walls.Exterior portland cement plaster (stucco).Interior and exterior specialty finishes.This inherent toughness is beautifully complemented by the variety of colors and textures available in plaster. Both traditional portland cement plaster and veneer plaster provide tough surfaces which are resistant to abuse and moisture. You can select a color and texture consistent with the message and image you wish to convey. Whether it’s your business or your home, appearance is an important consideration in selecting a wall cladding. Here at Courts Building Systems, we do both! Due to the popularity of drywall it can be more difficult to find both materials and skilled craftsmen for plaster projects. A common technique years ago, plaster is a rare wall surface today. ![]()
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