Does the type of joint in plaster affect its spacing or location? Will not rust M style has peel off protective tape, V style does not. No panel should exceed 144 sq. A two-piece joint manages some larger movements in the range from 1/4 inch to just under 1/2 inch. Shrinkage Crack. The control joint is a continuous space where the brickwork does not touch. STUCCO Crack REDUCTION System ( Optional) Refer to SMA website for more information. Locations for movement control joints are typically required: vertically in accordance with the supplier’s instructions, typically up to 5.4 m for fibre-cement and up to 20 m for EIFS aligned with structural control joints at each floor level for horizontal joints Chamfered reveals are an improvement over standard stucco reveals in that they offer a new more appealing look to the design and an improved mechanism for stucco embedment. screed ground to assure proper plaster or stucco thickness. Generally, joint spacing should meet these criteria: Juan Rodriguez is a former writer with The Balance who covered large-scale construction. 2 Typical Expansion Joints. Structa Wire Corp. per ASTM C 1063 – recommends that Control Joints be used to delineate stucco areas not greater than 144 sq. PVC material conforming to ASTM standards D1784, C1063 and D4216-99 8 foot lenth ft. on vertical applications. STUCCO FAILURES and REMEDIATION Roger G. Morse AIA Morse Zehnter Associates Rensselaer Technology Park ... •Expansion joints. Stucco Accessories. If stucco is applied using metal lath, joint spacing should follow Portland Cement Plaster/Stucco Manual, EB049, and is based on ASTM C1063 – Standard Specification for the Installation of Lathing and Furring to Receive Interior and Exterior Portland-Cement Based Plaster requirements. While there are several parts of the North America where stucco always has a strong presence, there appears to be a general renewed interest in portland cement plaster for building finishes everywhere. Expansion Joints: [Two-piece-type formed to produce a slip-joint.] The Double-V Control Joint counteracts the inherent shrinkage during stucco curing and general thermal changes. Temperature changes. The use and spacing of stucco control joints depend on several factors: type of materials, the orientation of the building, and the type of surface. LOCATIONS. V E R T IC A L C O N T R O L J O IN T ... CONTROL JOINT DRAWING 5: Control Joint Cross Section PAINT Control Joint Cross Section. (Bag Products) Must be stored in a dry location, off the ground, out of direct sunlight and protected from moisture. Stucco control joints are used to help aid in preventing cracking in the stucco overtime. "J", "XJ" or "Griplock J" types of control joints with expanded flanges and the narrow wing control joint with the "J" type shoulder or nose are all grouped together because of the commonality of their shoulder shape. Double "V" Expansion Control Joint Used to provide mechanism for movement to accommodate expansion and contraction caused by initial stucco shrinkage and minor thermal movement. 2 Stoistheinnovativeworldleaderincladding,coatingandrestorationsystems. Joint spacing in stucco is more of an issue over frame construction. It does not matter what the joint is called so long as the joint breaks up the brickwork into panels which will not crack or bow due to the various building movements. The product relieves the stresses of expansion and contraction associated with natural shrinkage and basic thermal changes during stucco curing. How to Repair Concrete Using Epoxy Products, Essentials for Applying Epoxy Flooring Over Concrete, Uses, Benefits, and Drawbacks of Fly Ash in Construction, Learn the Basics of Brick Masonry Construction, Wall Tiling Basics: Tools, Adhesive, Grout, and Cutting Tiles, Patch Stucco With Wire Lath and Quick-Set Mix, Different Mortar Mixtures and How to Mix Like a Pro, Great Siding Options for Houses and Commercial Buildings, Tips on Installing Ceramic Iile Over Concrete, Wood, and Existing Tile, The Balance Small Business is part of the. The width of an expansion joint is typically chosen to match the width of the mortar joints for aesthetic reasons, in which case, the typical distance between control joints will … A concrete driveway may experience temperature differentials from 20 degrees below zero to above 100 degrees in hot summers. Avoid Cracked Plaster by Using Stucco Control Joints, Placing Tips for Different Concrete Joints, What a Builder Needs to Know About Traditional Stucco Material, Pros and Cons of Different Subfloor Materials, Best Practices for Pouring and Curing Concrete in Cold Weather. No length-to-width ratio should exceed 2 ½ to 1 in any given panel. Reinforcing Mesh Store reinforcing mesh in the shipping box in order to keep it clean, dry and protected. Keywords: stucco, failures, restoration, water intrusion, moisture, insects, efflorescence, corrosion Such fire walls become locations for expansion joints. Understanding Concrete Saw Cuts: Why, Where to Cut, and How Deep? = width of expansion joint (m) and, “ei” = percent extensibility of the expansion joint sealant material. There are also three piece joints, rarely used, that can be installed at outside corners and soffit vent expansions. Stockton Products: Metal / Stucco > Expansion Joint ©1949-2021 Stockton Products, all rights reserved worldwide. The width of the joint, typically 3/8” to 1/2” (10-12mm), is dependent Check out our recommended tools right here: https://www.stuccoplastering.com/tools/Hello, our faithful subscribers and plasterers around the world! ft., or at maximum distance of 18 feet between Control Joints. Expansion joints allows for movement without damage to the concrete. AMICO’s metal lath, reveals, stucco window trim and accessories are quality built to give you the peace of mind that you’re putting the best components into your project. 2. A control joint shall be installed where the ceiling framing or furring changes direction.” Finally, it states, “A control joint shall be installed where an expansion joint occurs in the base exterior wall. These are usually located through wall expansions, using a female expansion over a flexible membrane which prevents leakage, something quite normal in these beads. (305 mm) past the vertical reinforcement adjacent to the opening (Figure 2c), joint reinforcement may be placed in the first two mortar joints above the opening and extended to the control joint on each side, or a horizontal bond beam could be used, as shown in Figure 2d. The use and spacing of stucco control joints depend on several factors: type of materials, the orientation of the building, and the type of surface. Control Joints: One-piece-type, folded pair of unperforated screeds in configuration; removable protective tape on plaster face of control joint. height door frames are also considered control joints. Stucco does not require expansion/contraction joints when directly applied to concrete, concrete block, or other masonry, except where there is a change from one material to another. However this issue is fully addressed in the International Building Code (IBC) and in ASTM C 1063. Settlement Crack. Stucco joints can also separate different textures, colors, or materials. For additional information on Double "V" Expansion Control Joint, download a product specifications sheet. The design of "J" joints locks the stucco to the edge of the joints and reduces separation at the joint's edge. The stucco must be separated by an expansion joint at the location of the slip track as well. Typical locations for control joints would include: off corners of windows, structural plate lines (expecting minimal movement) and junctures of dissimilar substrates. They can also be formed by using back-to-back casing beads mounted over a flexible membrane. The joint shall be installed Insulation Boards Fig. In such cases, the detail-ing of joints can be difficult because the fire wall must be supported laterally. They are also considered control joints and are one-piece joints. Expansion Joint is has double V rib design with expanded galvanized steel lath provides 1/2 in. Typical locations for expansion joints would include: structural plate lines (expecting significant movement) and at structure expansion joints. Tuesday, December 10, 2019. Control Joints: defined as a joint that accommodates movement of plaster shrinkage and curing along a predetermined line Panel size limit of 144 square feet (walls), 100 square feet (soffits) Max distance of 18 feet Max length to width ratio of 2.5 Where framing changes direction Expansion joints: defined as a joint that accommodates Any cracking that may be experienced is accommodated across several grout joints, thereby allowing a distribution of the No matter if the joint is called a control joint, a contraction joint, or an expansion joint, it is there to relieve stresses. Stucco can be applied over concrete and masonry surfaces and will only require joints over concrete or where there is a change in material. Since stucco plaster is so thin, it must be divided into sections during installation to reduce cracking due to volume changes over time. The designer is also cautioned that Fig.1 Expansion Joint Spacing Graph [taken from F.C.C.Tech.Report No.65, Expansion Joints in Buildings]. Stucco can be applied over concrete and masonry surfaces and will only require joints over concrete or where there is a change in material. EXPANSION JOINT: ASTM C1063 defines expansion joints to be “used to accommodate some degree of movement in the stucco membrane cause by movement of the building or its components to minimize damage to the stucco and water resistive barrier”. Stucco Expansion Joint Use at all locations specified in plans to prevent cracking of stucco systems. STUCCO/PLASTER GRID SUSPENSION INSTALLATION Main Beam Hanger Wire Wafer Screw Stucco or Stop Plaster Cross Tee Hanger Wire Main Beam 1/2" Densglass Track Main Beam Expansion Joint Intersection Isolated CornerC orner Details of Stucco/Plaster Systems Densglass EIFS Finish Coat EIFS Finish Densglass Channel Molding DETAILS OF STUCCO/PLASTER SYSTEMS Expansion joints. The #40 Expansion Joint is also available in zinc for increased corrosion resistance. Backer-rod and elastic sealant is often installed to assure water resistance. expansion joints. Stockton Products > Metal > Stucco > Control Joint NEW. g1.14 typical expansion & control joint locations intersecting joints: 1. water-resistive barrier is continuous behind control joint accessory 2. lath is interrupted at joints 3. set joint ends in elastomeric sealant 4. miter joints intersecting 5. vertical joints continuous, except use a 4-way miter at vertical compression locations. accessories such as expansion joints, control joints and corner beads; water intrusion where walls sit on solid structures such as concrete bond beams or slabs; corrosion of stucco accessories; and efflorescence at stucco accessories. Depending on the type of movement expected, the joint must be able to move in one direction or two by using some combination of materials, or by prefabricating the joints at the job site. We are often asked if stucco and plaster are the same thing, and if plaster and exterior insulation finishing systems (EIFS)are the same thing. Additional weather shields should be installed behind the joint to enhance the weather resistance of this system. This will improve the bond between the stucco and the joint to help reduce separation at these locations. Unlike stucco, which is monolithic and as a result high-lights any cracks, ACMV installations contain “built-in” control joints (grout joints or dry stack stone joints) which provide for expansion or contraction movement. Stucco control and expansion joints are available in roll-formed galvanized steel, zinc alloys, and polyvinyl chloride (PVC). The "M" type provides movement control but also gives the appearance of a narrow reveal. The advantage to this shape is that the down turning shoulder bites into the stucco and as a result the crack described in the last paragraph is less likely to occur o… The benefit of using this method is that the joint is filled with backer rod and silicone caulking, which works better than the flexible standard membrane. As an alternative to extending the lintel reinforcement a minimum of 12 in. Concrete, like many other materials, expands when heated and shrinks when cooled. He is an engineer with experience managing and overseeing large civil works construction. A two-piece expansion joint can slide in different planes. Product illustrations are for reference only. The distance between control joints shall not exceed 18 feet in either direction or a length-to-width ratio of 2 1⁄2 to 1. "J" control joints are manufactured with expanded flanges so that the crack is less likely to occur or be exposed. The "V" type joint is typically used when the area is larger than 144 square feet. 7.11.4.2 The distance between control joints shall not exceed 18 ft (5.5 m) in either direction or a length-to-width ratio of 21⁄2 to 1. A one-piece joint is typically classified as a control joint. Stucco joints are commonly available as one piece or two piece joints. Shaped like a "V" or "M," it is usually fabricated with expanded flanges to increase bonding characteristic. A one-piece joint is limited in the amount of movement it can handle, and it can only move in one plane. Map Cracking. Galvanized • Zinc. The plaster must force stucco under the upside down "J" shape for this bead to perform optimally. Stucco Base Coats, CI System Base Coat & Adhesives and Stucco Level Coat, Fog Coat, etc. A control joint shall be installed where the ceiling framing or furring changes direction. µ £@fFϸ±èsñÿÕléMSŒe9XN‹´ ˁ‘Gk´’h¶áBÃV˜“ÀFxæ›/Ãõd¥ö’Ãk+8ëµ µ³p`Í#Y'ªÝ­ó|ʲò‘ÍQÕGQ-@÷|:l%FFZÑ1,‘Ë@ŸÅ流E. Joint spacing should not be greater than 18 feet. No panel should exceed 100 sq. The adjustable expansion opening, or reveal, is 1/4" to 5/8". If this is not done, deflection that should have been accommodated by the expansion joint now places stress on the stucco, resulting in cracks to relieve the pressure. Shrinkage Cracks. Vertical joints should be attached to a stud where necessary. ft. over curved or angular sections. Expanded flange control joint #15 Expanded Flange Control Joint (Double-V) is used to relieve stresses in large plastered areas of walls, ceilings, and stucco areas. These kinds of joints normally handle the contraction of the mortar mix and minor expansion and contraction. They are normally manufactured with tape over the groove for easier and faster cleaning. 7.11.4.3 An expansion joint shall be installed where …