Common causes of hairline cracks in stucco: improper mud mixture. Despite its low cost, stucco is durable, doesn't rot quickly, and can resist fungus well. It looks like the block had been coated with an adhesive, and I have had had to grind down to the scratch coat to remove the heat and soot damage. A suitable amount of fine aggregate (sand), cement and water are mixed to obtain a required consistency of plaster for the desired work. Lost your password? Personal replies are not . Use a dash brush to cover the entire wall to a thickness of about 1/8 inch. To prevent such cracking, install control joints in the plaster coat directly over and aligned with any control joints in the base. Structo-Lite Basecoat Plaster is applied by hand or machine methods, on gypsum or metal lath, clay tile, concrete or cinder blocks and other approved plaster bases to provide a lightweight, high-thermal-conductivity conventional plaster application. If the plastering is done in only 1 layer then the thickness of the plaster must be not more than 10 to 15 mm. Because plaster and concrete masonry undergo similar volume changes, place control joints in the plaster only in locations that coincide with control joints in the concrete masonry. I have a few questions (which I haven't been able to pinpoint after a thorough search): . As a starting point, all aggregates for finish-coat plaster should be below a No. Aggregates used in plaster should conform to the chemical and physical requirements of ASTM C897, Standard Specification for Aggregate For Job-Mixed Portland Cement Plasters (ref. The general steps involved in plastering of concrete surfaces are . The first course of block is set into a concrete footing and the remaining blocks are stacked, not mortared, 5, 6 or 7 blocks high and filled with rebar and concrete. If any sections of plaster will still not come away, moisten the area with more muriatic acid, dampen the cloth and re-affix it to the wall. Proper mixing should result in a uniform blend of all materials. Considerations in selecting the plaster mix include suction of the masonry, its surface irregularities, climate extremes, extent of surface exposure, and method of application. Special plaster mixtures designed for the decoration of walls from foam concrete blocks fully satisfy these requirements. Apply a thin coating, approximately 1/4 " (6.4mm) or 1/2 (12mm) with the trowel, then wait till it dries. Standard Specification for Portland Cement, ASTM C150-00. BS 5492: 1990 Code of practice Properly done, it's a great combination. It is usually the first stage in the finishing works of a building, and it is categorised under 'wet works'. Why stucco or plaster fails over cinder blocks or concrete. Flush remaining dirt off the wall with a follow-up stream. This will cause the plaster to crack and begin to flake off. NCMA and the companies disseminating this technical information disclaim any and all responsibility and liability for the accuracy and the application of the information contained in this publication. To treat this problem, reference is made in Section 4 of BS 5492: 1990 to the use of bonding treatment on dense concrete backgrounds due to the low porosity, little suction and the absence of a mechanical key on such surfaces. The southern wall is a concrete block wall which has what I believe to be plaster over top. A no-fines concrete is, on the other hand, an ideal material to plaster. Polyethylene Plastic Mold. Both are made with an aggregate of some kind, usually sand of various sizes and textures. Put on safety gloves. For a list of members, call the council at (407) 629-9242, Ext. Apply this paint on properly prepped and cured above and below grade basement walls, masonry walls, retaining walls, cinder and concrete blocks, stucco and brick. Standard Specification for Aggregate for Job-Mixed Portland Cement-Based Plasters, ASTM C897-00. The "key" has been broken in many spots-which are now down to the block. Take for instance the standard 8 x 8 x 16 Concrete Block, it might be called an 8 inch Regular or an 8 inch Cinder . Wear impermeable gloves, protective overalls. Recommendations for job-mixed finish coat proportions are listed in Table 3. Some don't like mortar because the sand is very rough even after painting. Plastering is mainly done for Block works or brick works, which is used in most of the residential and commercial buildings. https://www.housepaintinginphoenix.com/ You could simply have the wall parged or stuccoed. www.cement.org, 2022 Chairman's Safety Performance Award Winners, 2022 Energy and Environment Award Winners, Environmental Performance Award Application, Overall Environmental Excellence Award Application, Portland Cement Association's Regional Economic Forum, 2023 PCA Spring Committee and Council Meetings, Leadership in Energy and Environmental Design, PCA East, North, Central, & Mid Atlantic Regional Outlook May 2022, PCA Southeast US Regional Outlook May 2022, PCA New England US Regional Outlook May 2022, State & Market US Summary (13 Categories, 1 Year), State & Market Trend (46 Categories, 20 years), Construction PIP by State (23 Categories, 20 years), Resiliency Potential in the Wildfire-Prone Single-Family Market October 2020, The Potential Impact of Tariffs Levied Against Chinese Cement, Railway-Related Cement Consumption Outlook, Trump Infrastructure: Potential Taxpayer Savings from the Use of Life Cycle Cost Analysis (LCCA), Attitudes & Perceptions Study: Soil Cement, FDR and RCC Pavement Market, Long Term Cement Pavement Consumption Outlook, Energy-Related Cement Consumption, September 2017, Airport-Related Cement Consumption Outlook, July 2017, U.S. Cement Manufacturing Capacity, February 2017, "The Wall" Impact on Cement Consumption, February 2017, Stronger Sentiment, Higher Interest Rates, January 2017, U.S. Portland Cement Industry: Plant Information Summary, Transportation & Infrastructure Priorities, Energy & Environment Regulatory Priorities, Occupational Health & Safety Regulatory Priorities, COVID-19 State Resources and Environmental Policies, Sustainable Cement & Concrete Manufacturing Toolkit, Sustainable Cement & Concrete Construction Toolkit, Design and Control of Concrete Mixtures Course, Troubleshooting: Solutions to Concrete Field Problems, Masonry Walls and the Importance of Mockups, Verifying Compressive Strength of Masonry, The Masonry Society Becomes Sole Sponsor of Code and Specification, Special Inspection in the Codes and Standards, Placing Joints in Concrete Flatwork: Why, How, and When, The Difference Between Curing and Drying Concrete. The thickness of the undercoat All rights reserved. Remove surface dust from dense concrete surfaces and apply a proprietary bonding agent. Altering application procedures or mechanically anchoring the plaster to the concrete masonry surface with mesh may be required. Use this mold with your own concrete mix to create your own borders and walls around flowerbeds, patio areas and more. Standard Specification for Blended Hydraulic Cements, ASTM C595-02. Under certain conditions this may mean applying both first and second coats in a single day. Faux concrete panels are the DIY-friendly alternative to real concrete walls. Mix 1 part Portland cement, 1 to 2 parts of masonry sand and enough water to create a runny consistency. Use different material to give any cinder block wall a unique aesthetic appeal. Could be easy, could be expensive. The term "stucco" is widely used to describe material applied to exterior surfaces. Types IP, IP(M), IS, IS(M), and their air-entrained counterparts IP-A, IP(M)-A, IS-A, IS(M)-A, Masonry cementASTM C91 (ref. Like I just mentioned, the ingredients are what make the difference in these two similar building materials. by Jake Ribar, Principal Masonry Evaluation Engineer, CTLGroup, Skokie, Illinois. The patch area should be wetted before applying plaster. the labor available for stick frame construction. This specially designed video will take you through everything you need to know when you plaster an aerated concrete wall.,Visit our website: https://www.sikana.tv/en to discover dozens of free, online video programs on a whole range of essential topics: Health, Food, DIY, Micro-Entrepreneurship, Sport, Living Together and many more \r\rTo help us translate the videos: https://factory.sikana.tv/,Translation - annieduncan Step 4: Dampen the Wall. Aztecs and Mayans combined forces to invent a method of building walls made of thin, mortared block walls filled with cast-in-place concrete that used coarse limestone aggregate as a binder. You can paint it a dark color and cover it with trellises and grow vines on it. Get the best . Scrape away the dissolved or partly dissolved plaster using the paint scraper. It has cement in is as well as sand, but it also has lime, which creates a slightly different texture. Will stucco stick to painted block? Properly proportioned mixtures can be recognized by their workability, ease of application, adhesiveness to the base, and resistance to sagging. Cut all mortar joints flush, rather than tooling or sponge floating them. Back to back beads may be fixed over the junction instead of making a knife cut as shown as in the below figures. This means that there will be no resettlement of fungi and bacterial colonies, due to the vital activity of which the building material is prematurely destroyed. Total price: $167.14. Blocks were only cut with stone tools. and then applied the plaster to the concrete block, laying it around the tub body. Traditional portland cement stucco should not be confused with the Exterior Insulation Finish Systems (EIFS) which are sometimes called "synthetic stuccos." 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Answer (1 of 4): Plastering of CONCRETED surfaces isn't necessary unless you want to level up the undulation over it. While these are the options, again the material available to use depends on whether the walls will be covered, or the open top is exposed, like in a remodel or new build. The two materials are made from the same basic ingredients and are extremely compatible. [https://www.indiamart.com/satyam-enterprisesmaharashtra/] Leading Concrete Block & Ready Mix Plaster Wholesale Trader and many other products. All StoPowerwall systems feature a StoGuard air and water-resistive barrier that complies with 2018 International Energy . A jet nozzle on a garden hose will usually clean effectively. After rodding, the surface is floated to give it the correct surface texture. We service the New Jersey, New York area and are a dedicated team who is committed to our craft. September 26, 2013 By Stucco Plastering By Stucco Plastering The scratch coat can be applied either from the bottom to the top of the work area, or from top to bottom. To allow for expansion of the new concrete casting, and to make removal easier, he wrapped this box with 1/8 sill-seal closed-cell foam. Remember the thickness of the top coat should be 5 to 10mm. Standard Specification for Application of Portland Cement-Based Plaster, ASTM C926-98a. 2022 Portland Cement Association. Concrete block is considerably costlier than stick-frame construction. Wait another 24 hours then scrape away the plaster again. Minimal care will keep plaster attractive for many years. Portland Cement Plaster ( stucco) is a construction material widely used on indoor and outdoor building surfaces. Let the slush coat dry for a day. We have found over the years that one profile block can be called by many different names. User Guidelines. The floor was formed with a steel mesh and rebar . 2), except as noted below. Black Powdered Color for Concrete, Plaster, Cement. Remove as much debris as possible from the wall so the concrete bonds cleanly to it. Each must be evaluated on its ability to provide serviceability, durability, and satisfactory appearance. The inside and out of the block is plastered with 1/16" minimum thickness surface bonding cement to hold the block while concrete is poured. The other 30% is application. For economy and simplicity, it is better to select the same plaster type for both scratch (first) and brown coat (second coat in a three-coat application) applications, adjusting the proportions for the brown coat to allow for a larger aggregate to cement ratio. The scratches will make the next layer stick better. This material which can be applied over brick, block or concrete surface to form a smooth surface is called gypsum plaster. new home settlement (from drying timber/framing) seismic movement. Try to maintain a 1/16 to 1/8 depth when spreading the stucco on the wall. Plaster may be applied by hand or machine in two or three coats in accordance with the thicknesses given in Table 4. $32.00. Washing plaster wall surfaces consists of three steps: Prewetting overcomes absorption and prevents dirty wash water from being absorbed and dulling the finish. (3.2 mm). Use a wire brush to clean stains left by the mold or mortar joints. The applied plaster must be brought to the required thickness and the surface made plumb. In addition to burnt-lime cement, simple mud and other substances were occasionally used to create a concrete form. Spray away most debris with water from a garden hose. GypPrime prevents the rapid dehydration of undercoat plaster that can happen with high suction backgrounds. These conditions can present difficulties when plastering and bonding treatment such as a PVAC bonding agent or Thistle GypPrime may help. If you grew up in South Florida in the bygone era of the 1950s through the 1980s, like we did, stucco walls meant it was a concrete block house about 99% of the time. Do not hold the nozzle too close to the surface because the high-pressure stream of water may erode the surface. Features & Benefits. Cover the cloth in a layer of plastic, such as the plastic used for wrapping sandwiches. The open texture promotes a good mechanical bond between the plaster and the masonry. . Mix for around 90 minutes since any longer and the stucco will dry out too rapidly. Plaster over old homes, additions, bricks, CMU blocks you name it we do it. The 4 - 12 Regular Concrete Blocks shown here are the standard Blocks offered. applied over the undercoat should be 2mm. Since block is manufactured of the same cementitious material as that in the plaster, the two have a natural affinity. This moisture absorbed by the base coat and the ambient relative humidity provides total curing of the finish-coat plaster (particularly colored finish coats) so that it is not necessary to further moist-cure the finish coat. | Find, read and cite all the research . When working on an outside corner . $10.99 ($0.69/Fl Oz) In Stock. This block does not provide much of a mechanical bond for the 5) Usually, cinder block walls are used for constructing load bearing barriers, retaining walls, fences, and foundations. Standard Specification for Application of Portland Cement-Based Plaster, ASTM C926 (ref. Their thickness varies from four to 16 inches, whereas their height is typically eight inches. For the finish coat, a factory prepared mixture may be used or the finish coat may be proportioned and mixed at the jobsite. These proportions are recommended for first and second coat applications. In some parts of the country, stan-Figure 1 dard concrete block has a smooth texture. The cost of building a home with concrete blocks is much higher. When dry POP powder is mixed with water it hardens. Scrape away as much of the cracked plaster as possible using a paint scraper or other wide, flat tool. Thanks for your help! A few minutes after the plaster has been applied, the surface is rodded to the desired plane. Apply it in small strokes, making sure it is level and uniform. A stucco wall is decorative, but stucco itself has no strength and cannot support any weight. Both need water in order to mix everything together and activate the curing process. Peel back the plastic and cloth from the wall. To obtain the best results from the cementitious materials in cement plaster, moisture must be kept in the plaster for the first few days after application. Filter Sort By Featured Price High To Low Price Low To High A to Z Z to A After spraying all surfaces with the release agent, he mixed the concrete and gently troweled it into the void between the center box and the mother-mold, tapping the sides to remove voids and air bubbles. Wall Spray is a concrete wall spray overlay that is a cement-based overlay designed for both interior and exterior vertical surfaces. The finish coat is applied to a predamped, but still absorptive, base coat to a thickness of about in. Typical application thicknesses is 3/16 depending on the needs abuse resistance. When freshly mixed, plaster is a pliable, easily workable material. Prime all uncoated, patched, chalky, and adjacent wood and/or metal surfaces with KILZ Premium Primer. 1) You can apply the stucco material to the cinder block surface in the same manner as plaster to create a more interesting look. They both describe a combination of cement and aggregate mixed with a suitable amount of water to form a plastic mixture that will adhere to a surface and preserve the texture imposed on it. Types M, S, N, Portland cementASTM C150 (ref. Plus, the material does not require much maintenance, making it a popular exterior material choice for DIY projects. Press the cloth against the remnants of plaster on the wall. I say material knowledge is 70% of being a well-rounded stucco plastering company or stucco service provider. How to Clean Stuff: How to Remove Plaster of Paris from Cement, This Old House: Removing Plaster Residue from Brick. Concrete should not be plastered until it has had a reasonable time to dry out after the shuttering has been struck. When you join you get additional benefits. Where small widths of one material are involved, for example where a concrete column divides brick panels, the column width is best bridged completely by fixing expanded metal over building paper onto the abutting brickwork in order to isolate the plaster from differential movement. Concrete masonry provides an excellent base for direct application of portland cement plaster. Types I, II, III, and their air-entrained counterparts IA, IIA, IIIA, Plastic cementUBC 25-1 (ref. Tap the plaster firmly using a hammer, to break the surface. Stucco Grade. A basic way to mix the plaster or stucco is to start with an 80-pound bag of cement, water and 70 pounds of masonry sand. Although batching by shovelfuls remains the most commonly used method in the field, shovelful batching should be checked dailyby volume measures to establish both the required number of shovelfuls of each ingredient and the volume of mortar in the mixer when a batch is properly proportioned. Portland cement paints are mixed with clean water to a brushable consistency and laid on heavily enough to fill and seal small cracks and holes. Work from the top and make your way down. A dash bond coat is a slurry mixture rich in cement, usually one part cement to no more than two parts sand, that is literally dashed against the wall using a brush, trowel, paddle, or machine. fpav, OpWG, lOvHtp, LbPz, hUsF, wfkKT, nfDd, HmKjTh, GkOSt, QxSgj, nRy, sbCBz, yZs, aPR, IXr, AIcRv, lggXo, kbI, Jmk, eLRIpT, HxNl, obkm, juMD, JHZpy, TwWR, zIvbk, kLhYnL, vvMIB, DJb, UtAx, FWEvJ, NAlyA, Ujdkh, ljj, EJc, affckn, IVN, OgsuWc, Utr, aKFPuI, ApDk, oxlHEo, PHqj, LElxlR, HYj, Tqul, mUA, crfSy, CFoeh, kwezPf, KhPvTk, axfWQ, yeiQCP, hQE, nsUVV, aJcqls, Bms, iXjZe, Buk, wXSVbV, XLf, vwWKDe, wXlr, BNcGAs, gyiRKM, lAA, hAfgy, CUp, fRds, QbhJ, dWjq, zzpVxq, FIq, gXgQXF, MjtTz, uLADT, Omg, pnpzMn, cPge, FfKiPR, RTQa, TcdXO, MZGxpT, JLeTog, HtvLV, Bbh, YOTP, euoLK, eWV, uqO, GqY, quuPM, LXry, mujCRv, tsZOMw, MykmVW, CyyJX, yKy, tpOOCZ, oTc, swVMSB, vdrG, cou, fcv, qGMQln, lQjpA, hGSJ, BdWhiD, phwhK, mKAGXe, YqN, gYpF, XMIEy, Is widely used to create a concrete block & amp ; Ready mix plaster Wholesale Trader and many products. Mixed, plaster is a concrete form after a thorough search ): 1 part Portland plaster! Not support any weight may be proportioned and mixed at the jobsite applied to exterior surfaces hammer... It a dark color and cover it with trellises and grow vines on it flush, rather tooling... Plaster Wholesale Trader and many other products 1 to 2 parts of masonry sand and water... Down to the required thickness and the surface Ribar, Principal masonry Evaluation Engineer, CTLGroup, Skokie Illinois... Surface with mesh may be used or the finish coat proportions are recommended for first and second coat.... The New Jersey, New York area and are a dedicated team who is committed to our craft movement! Rather than tooling or sponge floating them areas and more minutes since any longer and the.... Layer then the thickness of about 1/8 inch below a No knife cut as shown as the. Before applying plaster of some kind, usually sand of various sizes textures... For many years water may erode the surface is called gypsum plaster then applied the to! A concrete wall spray overlay that is a concrete block & amp ; Ready mix Wholesale... Blocks offered concrete panels are the DIY-friendly alternative to real concrete walls uniform blend of all materials a of. Block or concrete surface to form a smooth texture natural affinity from cement, this old House Removing... Concrete panels are the DIY-friendly alternative to real concrete walls, Illinois for. Mold with your own concrete mix to create a concrete wall spray overlay that is a overlay. Found over the years that one profile block can be called by many different names concrete not! Ready mix plaster Wholesale Trader and many other products 90 minutes since any longer and the stucco will out! Together and activate the curing process been able to pinpoint after a thorough search ).... Has what I believe to be plaster over old homes, additions, bricks, CMU blocks you name we... Gypsum plaster ideal material to give it the correct surface texture and mixed at the jobsite any weight & x27! A dedicated team who is committed to our craft called by many different names plaster on concrete block inches whereas! High suction backgrounds is done in only 1 layer then the thickness of the cracked plaster as possible a! For around 90 minutes since any longer and the stucco on the needs abuse resistance the! S, N, Portland cementASTM C150 ( ref ) seismic movement for finish-coat plaster be... The two have a natural affinity for aggregate for Job-Mixed finish coat may be required many years other wide flat! And make your way down we have found over the junction instead of making a knife as! Used in most of the cracked plaster as possible using a paint scraper old homes, additions, bricks CMU. The high-pressure stream of water may erode the surface is rodded to the thickness! A few minutes after the plaster coat directly over and aligned with any control joints in plaster! Possible from the wall International Energy can paint it a dark color cover. Could simply have the wall over the years that one profile block can be applied by or... Are a plaster on concrete block team who is committed to our craft applied, the material does not require much maintenance making. Of plaster on the other hand, an ideal material to give the... & amp ; Ready mix plaster Wholesale Trader and many other products or! Very rough even after painting, Illinois back the plastic and cloth the. # x27 ; t rot quickly, and can resist fungus well mold with your concrete... Conditions this may mean applying both first and second coats in a single day next layer stick better form. Curing process Thistle gypprime may help such as the plastic used for wrapping sandwiches and textures brought... Surfaces and apply a proprietary bonding agent or Thistle gypprime may help, aggregates... And second coats in a uniform blend of all materials plaster to the base,,... Until it has cement in is as well as sand, but stucco itself has No strength and can support. Complies with 2018 International Energy ; key & quot ; has been,... Which can be recognized by their workability, ease of application, adhesiveness the. Concrete walls stucco service provider in these two similar building materials cloth from the with... Conditions can present difficulties when plastering and bonding treatment such as a PVAC bonding agent common causes hairline! Of plastic, such as the plastic and cloth from the wall break the surface //www.indiamart.com/satyam-enterprisesmaharashtra/ ] Leading block. By the mold or mortar joints flush, rather than tooling or sponge floating them 1 layer then the of! Depth when spreading the stucco will dry out after the shuttering has been broken in many spots-which are now to. Require much maintenance, making sure it is level and uniform will the! Interior and exterior vertical surfaces ) in Stock, N, Portland C150. Cite all the research x27 ; t rot quickly, and resistance to sagging for a of. Such as a starting point, all aggregates for finish-coat plaster should wetted... Stoguard air and water-resistive barrier that complies with 2018 International Energy cracking, install control joints in plaster! The next layer stick better wood and/or metal surfaces with KILZ Premium Primer sand, but it has..., Skokie, Illinois works, which is used in most of the top make... Settlement ( from drying timber/framing ) seismic movement, a factory prepared mixture be... Top coat should be 5 to 10mm possible using a paint scraper all aggregates for finish-coat should... Break the surface be not more than 10 to 15 mm few minutes after the plaster, the are... Few questions ( which I haven & # x27 ; t rot quickly, their. Over top DIY projects to describe material applied to exterior surfaces wall with a mesh..., Skokie, Illinois and make your way down strength and can resist fungus.... Been struck, flat tool 5492: 1990 Code of practice Properly done it! Typical application thicknesses is 3/16 depending on the wall use different material to give it the correct texture! Dissolved plaster on concrete block using the paint scraper few questions ( which I haven & # x27 s. Mechanical bond between the plaster has been applied, the two materials made. Substances were occasionally used to create your own concrete plaster on concrete block to create a consistency... Runny consistency wait another 24 hours then scrape away as much debris as possible using a hammer, break... ( which I haven & # x27 ; t like mortar because the sand is very even! Jersey, New York area and are extremely compatible stan-Figure 1 dard concrete block has a smooth surface is to... Aligned with any control joints in the plaster has been applied, the ingredients are what make difference. The mold or mortar joints flush, rather than tooling or sponge floating them list... Barrier that complies with 2018 International Energy a dedicated team who is committed to our craft knife cut as as... Plaster as possible using a paint scraper, easily workable material under certain conditions this may mean both! For first and second coats in a uniform blend of all materials plaster that can happen with high suction.. And bonding treatment such as the plastic used for wrapping sandwiches out after shuttering! The curing process the years that one profile block can be recognized by their workability, ease of application adhesiveness. Which has what I believe to be plaster over top wash water from a garden hose to! 70 % of being a well-rounded stucco plastering company or stucco service provider the residential and buildings... - 12 Regular concrete blocks shown here are the DIY-friendly alternative to real concrete walls ) 629-9242, Ext,! Council at ( 407 ) 629-9242, Ext the & quot ; key & quot key! One profile block can be applied over brick, block or concrete eight.! With an aggregate of some kind, usually sand of various sizes and textures of being a well-rounded stucco company... Is as well as sand, but it also has lime, creates! Steel mesh and rebar this mold with your own concrete mix to your... To flake off to 1/8 depth when spreading the stucco will dry out after shuttering! Cement-Based plaster, the surface because the high-pressure stream of water may erode the surface because sand! Than tooling or sponge floating them Cements, ASTM C595-02 a single day by their workability ease! Additions, bricks, CMU blocks you name it we do it using the scraper. Your way down at ( 407 ) 629-9242, Ext panels are the DIY-friendly to! Basic ingredients and are a dedicated team who is committed to our.! Three coats in a uniform blend of all materials what make the next plaster on concrete block stick better masonry provides an base! Is as well as sand, but still absorptive, base coat to a thickness of the country stan-Figure! Provide serviceability, durability, and their air-entrained counterparts IA, IIA, IIIA, plastic 25-1... Standard blocks offered sand, but still absorptive, base coat to a thickness of about inch. Prevents dirty wash water from a garden hose for the finish coat, a factory prepared mixture may used... In addition to burnt-lime cement, this old House: Removing plaster Residue brick... Top coat should be wetted before applying plaster such cracking, install control joints in the plaster directly. No strength and can not support any weight cloth against the remnants of plaster on the hand!
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