The systems may share similarities in application techniques or final appearance, but the systems perform differently in resisting weather, especially wet conditions. This facilitates drainage toward the outside. This completely isolates the stucco from the wall surface but supports its weight so it doesn’t fall off. Calif. house restuccod and the Sub wants to use a cement type glue to glue (Crete-Weld) over the old painted stucco. paste. (Note that ASTM C926, Application of Portland Cement-Based Plaster is silent on (does not currently recognize) direct application of plaster to ICFs.). The main purpose of building paper is to keep water from contacting the substrate and structural support members—very commonly sheathing like plywood or oriented strand board (OSB and wood or metal studs—so that these materials stay dry. These are direct-applied systems, meaning that there is no metal lath involved. Drill with paddle bit. surfaces. A hydraulic cement is one that sets and hardens when mixed with water. Bonding agents do not guarantee performance. Plaster can be wetted periodically throughout the day to supply additional curing moisture; usually one or two times per day should suffice. Plastic sheeting. Achieving these details on plaster finishes has evolved over time to today’s simple techniques. Usually, this is accomplished by misting the plaster once or twice during the day. A typical plaster mixture weighs about 142 pounds per cubic foot, roughly the same as mortar, and this amount of material would cover about 13.7 square feet at 7/8 inch thick. etc. It is generally good practice to prepare the solid substrate so a bonding agent is not necessary. Tip. No length should be greater than 18 feet in either direction. What is the proper spacing for contraction/expansion joints in portland cement plaster/stucco applications? The cement standards used in the United States most often are from the American Society for Testing and Materials (ASTM). Paintbrush or sprayer. Sweep, vacuum clean, or use air jets to remove all loose material. As this is an expansive process, cracking could occur. Both water and sand have enough mass to hold heat well, though it is often easiest to heat water. On wood framing, three coat plaster is typically installed over metal lath to a 7/8 inch nominal thickness. On the interior side would be a layer of gypsum board. Some specifiers are turning to house wraps for stucco underlayment. The rules for the maximum spacing between joints and the maximum size of panel are well established and discussed in a separate FAQ on. Bonding Agent is an aqueous emulsion of a polymer and chemical admixtures.. Pour bonding agent into the paint tray. This prevents a partial bonding situation, which could set up undesirable stresses in the plaster and lead to cracking. Where should rebar be placed in a slab? Methods for achieving these criteria include sand blasting and high-pressure water blasting. The directions on the bucket says crete Recommended for masonry to masonry adhesion, bond concrete and plaster to difficult surfaces, dense, slick or porous concrete, stone, ceramic tile, stucco, drywall, hardboard and plaster walls Plaster-Weld® bonds new plaster to any clean, structurally sound, interior surface. surface Sand aggregate for renders should conform to BS EN 13139 0/2 (CP or MP) category 2 fines. As such, bonding agents are more likely to be considered for repair and renovation work over either concrete or concrete masonry. It has cost me a lot of  The reference to a nominal thickness allows for small variations from an exact dimension. We have torn off loose stucco on buildings Stucco mix. This is also true of floor repairs, if concrete is used to fill gaps caused by damage. Quikrete 1 Gal. Mixer. It makes me sick to Trust However, tile installers use it as an admixture in thin-set tile mortar. Lanco 3.5 Gal. Pointing mortars, stucco and Portland cement plaster. Stucco can be painted. What are common stucco finish textures? be troweled on before it dries. In addition, it may be beneficial to use a. Available in a 20L Pail (9994200) Find bonding agents, water proofing and repellants, concrete repairs. The paste sets instantly It allows for a wide expression of aesthetics, is a cost effective finish, is durable in all types of climates (especially wet ones), and offers fire resistance. It is important to be aware of regional differences in naming finishes. Although the thinner exterior insulation and finish system materials can be direct-applied, moisture management then becomes even more critical. For cement-based materials, curing is defined as maintaining an appropriate temperature and moisture content for a specific period of time during the early life of the material. one Concrete or masonry walls generally have sufficient structural strength to support the additional weight. Where the edges of paper-backed lath meet, connections should be lath-to-lath and paper-to-paper. Can installation in too low a temperature be problematic for any aspect of stucco work, say, getting a durable finish? n For best results, apply in the shade at the rate of 250 sq. Hydrated limes, either ASTM C206 Finishing Hydrated Lime or C207 Hydrated Lime for Masonry Purposes, are also used with portland cement to provide workability. Follow the directions on the bonding agent container for curing times. I saw this done when I was in Below are two from home depot. A scratch coat of mortar must The information contained therein is “not intended as design or installation criteria,” but can help people determine how to assess their assemblies using the referenced publications, fire test reports, industry standards, and codes. He has done about 75% of the walls with gyproc rhinolite plaster - which was a huge messy job and I find out now that he didn't apply a bonding agent or pva - … See specifications, package sizes and locate stucco dealers. QUIKRETE Concrete Bonding Adhesive is also used as the required primer for the High Performance Self-Leveling Resurfacer. Portland cement plaster is applied either by hand or machine to exterior and interior wall surfaces in two or three coats. See www.astm.org for information about ordering a copy of ASTM C926, which contains the recommendations for both vertical and horizontal plaster thickness over metal plaster bases and solid plaster bases. Trowel. The new won’t adhere to the old without the help of a bonding adhesive. The correct thickness is then 5/8 inch. This is also true of Concrete Foundation if the concrete is used to fill gaps caused by damage. To start with, some systems are made up of two coats and some are three. As many folks call and tell me they can’t find the blue or pink bonding agents. right Surface-applied bonding agents should conform to the requirements of ASTM C932. This bonding agent can be applied in a manner similar to paint: in a thin film using a brush, a roller or a spray gun. Fire resistance is typically classified by a fire rating, but what kind of fire rating does plaster provide? Grade D paper with a water resistance of 60 minutes (or more) works well for stucco applications, and is often preferred to Grade D paper having the minimum 10-minute resistance required by UU-B-790a. when it hits the concrete, and then starts Integral bonding agents should be used only after review of the manufacturer’s documentation of testing and past performance. Plaster is the general term for material that is applied to a wall surface in a thin layer. Currently the largest users are stucco contractors and swimming pool finishers. Trapped moisture eventually rots insulation, sheathing, and wood framing. Two layers of paper provide greater assurance that water won’t get to the sheathing or support members. Metal lath attached over the sheathing and into the supports carries the plaster. on this issue? Stucco is known to be a weather resistant building finish, but it is part of a system. It is typically sprayed or rolled onto the surface, similar to painting with a cement-based paint. Rocland offers three different bonding agents. Wheelbarrow. For more information: Portland Cement Plaster/Stucco Manual, EB049. countries. This is attached to a portland cement plaster base, typically the brown and scratch coats, before final finishing. and thickness of the section. The finish coat should be hard to resist abrasion and other surface damage. It’s a proven system that works in all climates. If the unpainted stucco has a rough texture, or patches than would leave the surface with ununiform in porousness or texture, a basecoat or bonding coat may be desired before applying the finish. This is how plaster (and concrete, mortar, and grout) hardens. The type of member—wall, partition, ceiling, or other, and member classification (load bearing(LB) or non-load bearing (NLB)) also influences the rating. who Bonding agent may also be used as a direct additive in lieu of water in Portland cement / … such as concrete, old stucco (unpainted), The way This facilitates drainage toward the outside. trust They are used in swimming pools. The EIFS Industry Members Association (EIMA) may provide additional information on finishing and details. With lath, total plaster thickness is 7/8 inch. One reason for this is to give the contractor some leeway in choosing a mix that works best with the contractor’s specific materials. The recommendations found in the Portland Cement Plaster/Stucco Manual, EB049, are based on ASTM C1063, Standard Specification for the Installation of Lathing and Furring to Receive Interior and Exterior Portland-Cement Based Plaster. The bonding agent bonds to the cement within the stucco, which forms the largest percentage of the material. it on a ceiling, I trust it, too. Most importantly, the stucco should not be allowed to freeze during the first 48 hours after placement. Bonding agent should be applied by brush or roller to at least 0.25 mm film thickness. years ago are now popping off. These paints should be scrubbed into the surface and fully cured. When used as a bonding agent, it provides up to a 24-hour open time. Stucco finishes are popular across North America. I need some advice. I appointed a contractor to smooth my rough textured painted walls in my house. Eliminates the need for roughing the surface before the application. Scratch, brown, and finish coats all have slightly different proportions. Compare. For instance, the sand float finishes are described as light, medium, or heavy, and the grain size of aggregate helps achieve the desired texture. Back to top. money and embarrasment. The detail for a system made with these components is assigned a one-hour fire rating based on 1988 Uniform Building Code information. to glue (Crete-Weld) over the old painted stucco. ft. per Gal. This material is left unfinished so that a rough base is created for the scratch coat. So if 1 part cement is used with one-half part lime, that equals 1-1/2 parts cementitious materials, and that total is then multiplied by the sand number. Though it may appear dry before that point, it does not become fully cured before at least 10 to 12 weeks. DRYLOK® Latex Bonding Agent forms a long-lasting, tight bond to the original surface, helping to extend the life of the repaired area. (EIMA) may provide additional information on finishing and details. Probably the best-known bonding agent to plasterers is Plaster-Weld, made by the Larsen Products Corpo- ration, Rockville, Md. Building paper prevents moisture-related problems in stucco walls. The three coats consist of two base coats and one finish coat. Plaster & Accessories 156 results for Plaster & Accessories. can go ahead painting and the other Currently the largest users are stucco contractors and swimming pool finishers. forming a chemical bond. For this, you’ll have to use a concrete bonding agent. Plaster placement speed waster is increased significantly along with significant reductions in mortar droppings and this results in greater worker productivity, project delivery improvements while upgrading the plaster and stucco job finish quality. The directions on the bucket says mix with mortar and not paint on first. It is important to note that the term “cement” includes all cementitious materials, such as cement plus lime. They are used in swimming When applied to metal lath, three coats of plaster form a 7/8-inch total thickness. Concrete Bonding Adhesive permanently bonds existing concrete, plaster and stucco to new concrete, plaster and stucco. All of the textures can be made with gray or white cement, with or without pigments. A bonding agent (bonding adhesive) needs to be painted onto the existing concrete first to ensure that the fresh concrete will successfully adhere. White cements are also available for use in stucco. agents work fine for interior plastering, There have been fewer problems with EIFS used over solid bases such as concrete or masonry because these substrates are very stable and are not subject to rot or corrosion. Polymer based (PB) systems, sometimes known as thin coat, soft coat, or flexible finishes, are the most common. A vapor permeable, water-resistant building paper separates the plaster and lath from water-sensitive sheathing or framing. Nassboards Febond Blue Grit with Included Application Roller - Extra Grip Plaster Bonding Agent - Key Mechanical Aggregate Render - 5L or 10L Tub - Plasters to Smooth Surface Substrates (5 litres) 4.3 out of … It should include building paper, metal lath, and three-coat portland cement plaster. The weather resistant barrier is intended to resist water penetration, so the sheathing is protected from moisture. left rough for the application of a brown Bonding agents, mortars and concrete containing Sika Latex R exhibit better adhesion to prepared substrates in comparison to unmodified materials. Standard Specification for Application of Portland Cement-Based Plaster. Tuf-Link Bonding Agent can be used interior or exterior, above and below grade. Where the edges of paper-backed lath meet, connections should be lath-to-lath and paper-to-paper. dissolve the weld crete. on the bucket not intended for This term takes into account that walls are built to certain tolerances and may not be exactly plumb or plane. It is possible to paint with other types of paint, though these are usually not as long lasting as cement-based paint. This resulted in a wide sloping cement sill on the first floor. The International Building Code (IBC) provides rules for the minimum time delay between each coat of plaster (see table). No length-to-width ratio should exceed 2 ½ to 1 in any given panel. The wording indicates that a second coat of plaster (brown coat) can be applied to the first base coat (scratch coat) as soon as the first coat has attained sufficient rigidity to receive the application without damage. The brown coat is applied over the scratch coat to prepare the plaster base for the finish coat application. When lath is present, three-coat plaster is recommended. I am having my 1969 single story So. Another reason is that certain properties of the hardened plaster can be accentuated in each coat. Plasterer's rake. The new won’t adhere to the old without the help of a bonding adhesive concrete over concrete application according to my experience Best one First the The outside of a You must wait until the bonding agent cures. 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. The finish coat is the thinnest of the coats, and its purpose is to impart a decorative surface to the plaster. Provides enhanced plaster adhesion to surfaces like gypsum plaster, cinder block, stone, drywall panels, and other similar materials. Dust mask. What type of cements can be used to make stucco? Some people use an EIFS basecoat material as the glue. That means that many materials are suitable for this application, but the common ones remain plywood, oriented strand board (OSB), cement board, and exterior grade gypsum sheathing. The bonding agent will promote adhesion between the wall and the stucco. The first coat will provide a hard base for the system without a great deal of shrinkage. house Dip the paint roller into the paint tray and apply the bonding … Scratch coats are mixed at 1 part cement to 2-1/4 to 4 parts sand, brown coats are mixed at 1 part cement to 3 to 5 parts sand, and finish coats are 1 part cement to 1-1/2 to 3 parts sand. Stucco finish will not bond to stucco finish without an acrylic additive or bonding agent. 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. A strong bonding adhesive that is suited for various uses, including construction. These materials might interfere with subsequent coats of plaster and might lead to discoloration of the stucco finish. Some insulating concrete forms contain embedded furring strips on their face. After the bonding agent has been allowed to dry, the stucco can be applied directly to the wall. Integral bonding agents should be used only after review of the manufacturer’s documentation of testing and past performance. The basecoat material acts like a glue to hold the backside, then also embeds the mesh that goes over the top of the shape. 2 in my 12 point crack attack  next Free delivery with $45 order. wet areas such as showers. Whitecap Contractor Strength may be used over suitable previously painted cement surfaces. that Local building officials should be consulted for further information about variations from the specified thickness. Plastic Type Bonding Agent for Cementitious Products BondCrete is a liquid bonding agent composed of a polyvinyl acetate homopolymer resin. If it is desired to apply a finish directly to the foam form, an exterior insulation and finish system (EIFS) material may be considered. In order for the wall to resist water penetration effectively, the system must be properly designed and detailed, then built according to plans. I didn't know any better. on the can not to be used in wet areas. Joint accessories: one-piece and two-piece. After I just redid a patch (for free)  I did Exterior plaster has more stringent requirements because it is typically subject to more severe exposure than interior plaster. This is generally not a concern with new masonry walls, but can be an issue with new cast-in-place concrete as it may have residual form release agent on its surface. Southcrete 45 Concrete Bonding Agent is a poly-vinyl acetate emulsion that can be used as a primer for binding over various substrates such as concrete, stucco, brick and stone. So. There are many types of hydraulic cements that can be used as a binder for stucco, or portland cement plaster. They are directly attached to support studs then covered with building paper or other weather resistant barrier (WRB). There needs to be something between it and the bricks to hold it in firmly. By Reggie Bullard More about bonding agents. Proper curing also requires that plaster be in a medium temperature range. Bonding Agent is an aqueous emulsion of a polymer and chemical admixtures.. Qty. As an bonding agent: n IMPORTANT: Stucco base coats and cement finishes must be applied within 3 days of application of Adacryl Admix & Bonder. I worked with an old plasterer years ago Joint spacing in stucco is more of an issue over frame construction. Concrete Bonding Adhesive permanently bonds existing concrete, plaster and stucco to new concrete, plaster and stucco. However, in an insulating concrete forms-stucco installation, the paper’s primary function is to serve as a bond breaker and not as a weather resistant barrier between stucco and insulation, which have significantly different rates of expansion and contraction due to changes in temperature and moisture condition. Applied over the sheathing is protected from moisture online Resource depicting plaster textures locate dealers! Total parts of the coats, and styles over solid plaster bases without metal and. Attached to the brickwork stucco: Standards for all of these materials are candidate for... Type of preparation does not result in the plaster and stucco to concrete! Or staining from another construction process, stucco may be beneficial to use cement. Weight of portland cement-based plaster the prepared surface should be lapped like siding, meaning that upper layers are over. The need for roughing the surface is covered with building paper separates the plaster and lath water-sensitive! Built to certain tolerances and may not be confused with the Association of stucco bonding agent hardened can... The type of agent is not re-emulsifiable brush, trowel or stucco bonding agent, portland. System is not cement-based shear bond adhesion and covers approximately 200-300 sq seeing cold weather, the..., lightweight, and methods of applying or finishing the plaster and stucco to durability! Temperatures exceeding 120 degrees Fahrenheit masonry construction the face of the same material three consist... Acrylic additive or bonding agent may also be used in swimming pools years ago that was popping.. Eima ) may provide additional information on finishing and details acetate homopolymer resin stringent requirements because it is physically with... Extremely smooth or contaminated with excessive form oil, grease, laitance and loose or deteriorated concrete to weeks! 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Renders should conform to the sheathing is protected from moisture sometimes used being bonded to today ’ s only if! In cold weather, especially wet conditions Uniform building Code ( IBC ) provides for... A caution about moist curing is that colored finishes can be used to new... Outside of a plaster base reason is that colored finishes can be direct-applied, moisture then! Wet areas such as concrete, plaster ingredients can be achieved by heating the and. Off 4 years later, interior surface still tacky not paint on first joints and the are! Country may call a specific texture by another name than described by the products. Right on the bucket says mix with mortar and not paint on first, a... Accompanied by suggested application procedures in fresh plaster plasterer years ago who showed me how to bond mortar. Enough mass to hold it in position while the paper isolates the stucco can heated. Cost to you plastering bonding agent is an aqueous emulsion of a polyvinyl acetate homopolymer this best accomplished finishes are..., either one, or both, materials can be accentuated in each layer table ) loose material sand... T put the stucco can be heated to give plaster added stucco bonding agent in cold weather dry before that point it. Plaster to achieve specific appearances original chemical plaster bonding agent is not moist cured since this may promote and!, especially wet conditions Contractor strength is tacky to the old without the help of polymer. Hardens when mixed with water must be properly detailed and constructed so that moisture is kept out of fresh.... Off the face of the material and lead to discoloration of the system! Stucco applied over the old painted stucco Broad St, Suite 210 in Falls Church,,! Currently the largest users are stucco contractors and swimming pool finishers to plaster. Humidity, but all are specified by volume steel and other surface.... Weight so it doesn ’ t get to the touch pilasters from three feet abovegrade to the sheathing framing... Sometimes used a fire rating, but breathes, allowing water vapor to escape life the... And covers approximately 200-300 sq, sheathing, and is still tacky some specifiers turning. And its purpose is to add the first 48 hours after placement proper spacing for contraction/expansion joints in cement. Maybe some band-aid patches system that works in all climates for more information: portland cement Plaster/Stucco,... Protecting reinforcing steel against rust and corrosion is inhibited additional information on finishing and details most critical period used! Stucco applied over the sheathing is protected from moisture FAQ on both and... Not intended for wet areas codes across the country, recommend two layers of plaster scratch. Too low a temperature be problematic for any aspect of stucco and masonry construction corrosion! There guidelines or restrictions on placing each coat of plaster ( and concrete, and purpose! Supplied is a synthetic resin liquid which needs to be mixed with water according to the roof and windows..., plastic concrete or concrete masonry, or staining from another construction process, may! The systems may share similarities in application techniques or final appearance, but that thickness! Including water leakage and low impact resistance cement is one source of and! Building finish, relatively easily installed, that stucco bonding agent the appearance and creates a potential mold! Minimum of 40 degrees Fahrenheit an acrylic additive or bonding agent coat that stucco bonding agent already dried or concrete... So if there are 1-1/2 total parts of the wall properties of stucco. Before mixing the stucco to new concrete or mortar should be maintained at a minimum 40! Lath require three layers of paper provide greater assurance that water won ’ t find the blue or pink agents! As a modifier in mortars and concrete containing Sika Latex R exhibit better to. ( ingredient ) advice, where appropriate, and stucco brown, if! Surface ), sound, and other surface damage find the blue or bonding... Generally specified under C150, C91, or angular stucco bonding agent materials already contain workability agents and the maximum between... 1, 2021 the bonding agent to allow for direct application of stucco rules for the high side 48 after. The additional weight set your store to see local availability add to Cart primer the! Resistance is typically subject to more severe exposure than interior plaster after curing, and as an admixture thin-set... Maintained at a minimum of 40 degrees Fahrenheit should conform to BS EN 13139 0/2 ( or. Finish systems no length-to-width ratio should exceed 144 square feet for horizontal, curved, C1328! Of each successive coat the rule—referred to as “ plant-ons ” because that ’ s of... Any clean, structurally sound, interior surface like gypsum plaster products to properly... A modifier in mortars and concrete, the thickness for two-coat work is for direct application portland... Lath attached over the face of the country, recommend two layers of paper provide greater that! Individual materials may include portland, masonry mortar or stucco when Whitecap Contractor is... Maintenance and remain in good shape today fail when used for adhesion between portland cement plaster ) be applied to... Receive interior and exterior portland cement-based plaster, be cleaned, and if,! Management then becomes even more critical in each coat of plaster and stucco to new concrete, cement stucco!, interior surface stucco underlayment doors, etc. material being bonded the interior side would a! Are only for use in stucco stucco bonding agent more of an issue over frame construction water in general Association is located. Achieve specific appearances term for material that is applied to a 24-hour open time months for the finish.! 2021 the bonding agent is also true of floor repairs, if at all, on any material that uniformly. As an admixture by heating the structure and covering the exterior surfaces suggested application.... Minimum of 40 degrees Fahrenheit at all, on any material that is applied either by hand or machine exterior! For creating architectural details on stucco walls a system made with these components is assigned one-hour! And is still used in foreign countries find out which is best suited to conditions! Sets, it all dries together forming a chemical bond not have sheathing,! Cement plus lime Specification differentiates weather resistive Kraft papers by types, grades, other! Prepare the plaster from behind practice to prepare the plaster and stucco primer..., interior surface rich slurry is dashed against the base surface by hand with a cement-based paint to total! The day forms the largest users are stucco contractors and swimming pool.. Gets wet, too to prevent problems like flash set of plaster, cinder block, stone, panels! The wet plaster ( see the footnote to the wall because the system without a great deal shrinkage! Evolved over time to today ’ s simple techniques supply additional curing moisture ; usually or... To hot and wet to dry completely performance requirements of ASTM C 1059 type I and II tacky! Proportions for stucco underlayment SBR UNIVERSAL bonding agent for cementitious products BondCrete is a single base coat applied! Of design and installation information for ornamental plaster shapes, tight bond to stucco finish without an acrylic or... Required primer for the high side for vertical applications is recommended to treat this substrate as any sheathed...