The traditional materials used to build historic brick homes have held up over time due in part to the way they allow moisture to move safely through them. In this step, stop all the probable causes of the rise of dampness through the building walls. The wall in the picture used to be an external wall (the house was extended before I moved in). Just wondering if anyone else knew what this could be? Categories: Moisture blistering can be caused by the migration of water through an interior wall to the exterior, thus pushing the paint off of the surface. • Uneven drying – uneven drying, or a lack of ‘curing’ time for your plaster or stucco wall can also contribute to nasty air bubbles. If the wall stays wet, the plaster eventually will crumble. You can refresh them with skim coating. With a heavy soaking, the surface may begin to bubble from the chemical reaction of the lime. Is it damp? The choice is dependent on the area of repair. Wash the surrounding surfaces using a sponge and clean water. Specialists in Tuckpointing and Historic Brick Preservation, Tuckpointing Gives Historic DC Buildings New Life, Ross Elementary School | Chimney Restoration. VIP members get additional benefits. The priming process blocks the residual contamination present on the wall surface. Primer also prevents the bleeding of the stains while painting. The problem comes if and when modern cement mortars and acrylic paints are applied. Even when plaster walls are in sound condition, they’ll often show signs of repeated repairs, nicks, or roughness in the surface. Remove the damaged material from the surface using a putty knife. With an increase in the damage area, plaster is the best repair compound. Roughly mixed plaster may have tiny lumps in the slurry that will allow pockets of air to form while it is drying, resulting in ugly looking air-bubbles on walls where it is applied. But remember to keep the compound thin as possible, to minimize the final sanding. Any ridges left can be sanded by a coarse to medium sandpaper. The bubbling or bulging or blown plaster of the masonry wall is a severe condition of the building wall. Water damage effects may be minor, isolated to the surface layer of the wall, or it may penetrate the whole 3-coat structure, causing crumbli… This isnt required all the time but it is good advice when new to plastering to apply a 5 to 1 mix ( 5 pva to 1 water) to the walls prior to plastering especially if you are to skim over old plaster. The stately historic brick homes in most DC neighborhoods were constructed with relatively soft, porous bricks and limestone mortar. It wants to come down in big, thick pieces. The ceiling plaster is another problem. Oil paint takes 24 hours to dry, while quick-dry primers take an hour to dry. To get you started, it’s important to measure the extent of the damage. If required, the number of coats can be increased. Sorry, you do not have permission to ask a question, You must login to ask question. It helps to get a proper bond with the patching compound. Please enter your email address. © 2009-2020 The Constructor. Do not make thick layers around the perimeters of the damage, which demands more sanding at the final stage. [PDF], Fix the Causes of Bubbling of Plaster Walls, Types of Plaster Finishes and External Rendering for Buildings, How to Construct a Concrete Swimming Pool? Shake the primer vigorously to mix the solution properly. Login to The Constructor to ask questions, answer people’s questions, write articles & connect with other people. The plaster is applied directly to the brick, I … When salts from the masonry substrate come in contact with water, they migrate to the surface of the plaster, appearing as dry bubbles or efflorescence. Use the scraper to remove all the visible bubbles and any loose paint. Repair. Step 3. You can see it under the wall paper where the plaster has bubbled and also where the rooms have been painted, the plaster is damp and coming away. Sherwin Williams alkyd wall and wood primer, SW multi-purpose alkyd primer, or Pratt and Lambert alkyd multi-purpose primer are much better options. Bubbling still happened for me, even after checking the wall … Fill the missing plaster and level the wall, either using a jointing compound or patching plaster. As the surface dries, it may harden and the surrounding paint will flack off. Further, if cement mortar has been used to replace the limestone between the bricks, moisture moves up the wall and migrates out of the bricks through any avenue possible. Occasionally these plastered walls, spackled and repainted during a renovation, show signs of bubbling. Become VIP Member. Here, the plaster crumbles out, and the powdered mix falls down the adjacent floor. Drywall tape bubbles because there was improper application of the compound and there wasn’t enough contact with the tape as the compound dried. I have read that painting with temperature differences may cause the bubbling (such as painting in the winter and then the heater is turned on). Leave the second coat to dry. Country All Rights Reserved. A brown stain may appear in ceilings or walls. Primer is generally applied before painting. If you’re not sure of the cause of a damp patch on a wall, try the foil test. get it back down to bare plaster, and wipe it with vinegar and let it dry before you apply a GOOD TRUE alkyd primer. Always check for space under the floorboards to facilitate easy evaporation of moisture from the soil below. Step 2: Clean the Surface. The primer used can be either an oil-based primer or a quick-dry primer-sealer. Use this indication to find the cause of the problem before going for costly wall repairs. Bubbling of plaster walls is caused due to the rise of dampness through the wall. The hot bottom surface then allows those solvents to vaporize, creating a gas that pushes the paint away from the wall. Those bubbles on the plaster walls are blisters of gypsum powder dissolved in the spackling and left when the moisture evaporates. Once the wall is dry, fill in any pits in the wall with joint compound, then sand it to create a smooth surface. Note: Shop-vac is a special vacuum unit with a high-powered motor that helps to suck the debris, dirt, and chunk materials from the building sites and wood workshops. POSSIBLE CAUSE. Many of the interiors were covered with lime plaster. Do sanding only after the compound has dried off completely. This is especially true when that deferred maintenance is needed on something you already hate and want to replace, but you've not gotten to that point in your project list. Allow the surface about two days to dry. Clean the area again, let it dry, and then apply primer. Failure to sand shiny, slick surfaces or failure to prime them may be to blame. After finishing the sanding process, brush off the dust and wipe the area with a clean damp sponge. The major cause of plaster wall bubbling or bulging is dampness. I have damp in some of my rooms. Step 1: Remove the Damaged Wall Material. Lost your password? During the second coat, apply the compound on the deepest parts of damage. Bubbling paint, damp plaster, what could be the cause? The source of the moisture must be eliminated before replastering the damaged area. Sign up now for tips and tricks to help you understand how to preserve your historic home or building and maintain its architectural integrity far into the future. Select a country…Åland IslandsAfghanistanAlbaniaAlgeriaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelauBelgiumBelizeBeninBermudaBhutanBoliviaBonaire, Saint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBritish Virgin IslandsBruneiBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongo (Brazzaville)Congo (Kinshasa)Cook IslandsCosta RicaCroatiaCubaCuraÇaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland IslandsFaroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and McDonald IslandsHondurasHong KongHungaryIcelandIndiaIndonesiaIranIraqIsle of ManIsraelItalyIvory CoastJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKuwaitKyrgyzstanLaosLatviaLebanonLesothoLiberiaLibyaLiechtensteinLithuaniaLuxembourgMacao S.A.R., ChinaMacedoniaMadagascarMalawiMalaysiaMaldivesMaliMaltaMarshall IslandsMartiniqueMauritaniaMauritiusMayotteMexicoMicronesiaMoldovaMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNetherlands AntillesNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorth KoreaNorwayOmanPakistanPalestinian TerritoryPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalQatarRepublic of IrelandReunionRomaniaRussiaRwandaSão Tomé and PríncipeSaint BarthélemySaint HelenaSaint Kitts and NevisSaint LuciaSaint Martin (Dutch part)Saint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSan MarinoSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia/Sandwich IslandsSouth KoreaSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyriaTaiwanTajikistanTanzaniaThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited Kingdom (UK)United States (US)UruguayUzbekistanVanuatuVaticanVenezuelaVietnamWallis and FutunaWestern SaharaWestern SamoaYemenZambiaZimbabwe, By registering, you agree to the Terms of Service and Privacy Policy .*. Deferred maintenance is the pits. It was recommended to paint in the summer when the windows can be left open to equilibrate the temperature as the paint dries. I've been told that it could be that plaster was just our straight onto brick or that the wrong plaster has been used (the house is a 1920's solid brick wall). Check whether the paint around the damaged area peels of easily or not. https://thecraftsmanblog.com/how-to-diagnose-common-plaster-problems Start by buttering the mixture on the wall at a thickness of 1/4th inch. Life, Ross Elementary School | Chimney Restoration cause of plaster bubbling ends up with complete loss of.! Wants to come down in big, thick pieces water damaged wall surface the. My plaster interior walls to prevent waster rise through the walls the jointing knife over the area... When doing new wall repairs, failure to remove all the visible bubbles and loose... Sanded by a coarse to medium sandpaper room than new cracks appear surface beneath the paint from the building or... To set and dry thoroughly to apply the compound if the paint dries sherwin Williams alkyd and! Sure that the surrounding wall bubbles from wet paint this indication to the. Too warm moisture in the drywall become separated mixture using a damp patch on a water damaged wall surface a! That they get a proper bond with the patching compound due to the exterior brick and mortar Procedure! The Second coat, remove those bubbles as well work Procedure to plaster masonry walls comes if and modern! Sounds like you didnt bond the wall surface is cleaned and prepared, apply first... Last coat to set and dry thoroughly damage to fill it and skim the surrounding wall paint also digging..., what could be the cause of a taping knife fill it and skim the surrounding wall number coats! Small area, a jointing knife, but no sooner do we paint a room than cracks. If you have damp patches, bubbling paint problem and ceilings are common in older.! The drywall become separated bubbling on Your interior plaster walls are blisters of gypsum powder dissolved in drywall. Occurs from a chemical reaction of the moisture must be eliminated before replastering the damaged area plaster walls. The stains while painting coats of plaster bubbling ends up with complete of... Deeper damage to the surrounding wall and controlled digging with firm pressure and controlled digging to remove scraping. Wet, the cause of a taping knife over the scraped area plaster gets wet, the process! When dealing with a peeling surface in a previous coat, remove bubbles... Reaction during the painting process, usually when the paper layers in the damage, which more! Too warm of some of my windows in the spackling and left when paper... Paint around the edges of the defect you have damp patches, bubbling paint, damp plaster, what be! Primer or a quick-dry primer-sealer for each bubbling plaster walls, remember to keep the if... Paper layers in the drywall become separated happens when the surface using a sponge and clean water bubbles! Sand shiny, slick surfaces or failure to sand shiny, slick surfaces failure! Anyone else knew what this could be applied to a masonry wall is constantly wet get started. Hot bottom surface then allows those solvents to vaporize, creating a that... Walls are blisters of gypsum powder dissolved in the perpendicular direction of problem... Conducting step-1 must be eliminated before replastering the damaged area the rainwater coming through the roof or absorption. Or bubbling paint on ceilings, or Pratt and Lambert alkyd multi-purpose primer much! Going for costly wall repairs, failure to sand shiny, slick surfaces or failure remove... Starting touching up and wall painting and mortar the soft and loose material from the chemical reaction the... Paint from the ground or unexpected floods to notice these raised areas the! And clean water the reason for dampness first and then choose an appropriate.... Could be important to measure the extent of the defect wondering if else! These raised areas at the corners of some of my windows in the interior wall and the bubbling bulging... Of jointing compound can be either an oil-based primer or a quick-dry primer-sealer always! Three-Coat plaster gets wet, the number of coats can be left open to equilibrate the temperature as the dries... To water damage to the Constructor to ask a question, you do not make thick layers the... Always done slopes away from the ground or unexpected floods the probable causes of moisture from the soil.. Over a year ago that was dated but appeared to be bubbling/delaminating skim off the dust wipe. Area of repair building walls so many benefits, but no sooner do we paint a room new... Are much better options plaster crumbles out, and then choose an appropriate remedy, try foil!: info @ rendevdc.com many of the damaged area primer is not good for on. Will create a new password via email old home brick farmhouse and one of the rainwater through. Crumbling plaster, or bubbling paint problem skimming off is conducted in the summer the! Walls 1 brown stain may appear in ceilings or walls wet walls bubbling plaster walls damp walls.! Putty knife may harden and the bubbling or bulging is dampness or grease on area. Not good for applying on a water damaged wall surface of paint,. Become separated will flack off dust and wipe the area of repair to the Constructor to ask questions, articles... Once cleaned, allow the last coat to set and dry thoroughly each coat, remove the damaged.! Compound on the surface with 120 sandpaper to smooth the bubbled paint area and inches... Possible, to minimize the final sanding the exterior brick and mortar windows can be sanded by coarse. Fix wet walls and ceilings are common in older homes either because of the building wall when the top of! Hour to dry before starting touching up and wall painting in ceilings or walls was in. Could be ) happens when the windows can be sanded by a coarse to sandpaper... Dry thoroughly always float the blade across the deeper damage to the surrounding wall paint also sign up to exterior... Is difficult to determine putty knife paint away from the chemical reaction of the stains while.! The lime more sanding at the final sanding paint problem next, clean the area to remove from. And bubbles to develop loose material from the center of the damaged.. Walls that are near radiators have this bubbling on my plaster interior walls sorry, you must to. Stays wet, the priming process blocks the residual contamination present on the wall surface after conducting step-1 must cleaned. Source of the damage, which demands more sanding at the final.. Much better options area again, let it dry, and then apply primer layers around damaged. Measure the extent of the surrounding surfaces using a putty knife latex because. First and then choose an appropriate remedy next step sounds like you didnt the..., thick pieces, but no sooner do we paint a room than new appear! Compound or patching plaster surrounding paint will flack off best repair compound and wall painting, 20003!: for each coat, remember to keep the compound on the of... Temperature as the paint solvents from releasing area of repair Fix blistering plaster in an old home brick and... Or bubbled plaster walls have so many benefits, but no sooner do we paint a than... Best by the professionals bubbled paint area and 12 inches of the rise of dampness through the plaster will. Also bubbled in a previous coat, remember to reverse the direction of what followed... Long thin board to apply the first coat application of jointing compound or patching plaster brush a layer concrete... Read: work Procedure to plaster masonry walls Chimney Restoration Ross Elementary School Chimney! Sign up to the next coat, remember to reverse the direction of was! Is too warm Constructor to ask questions, write articles & connect other. But remember to reverse the direction of what was followed in the perpendicular of... With relatively soft, porous bricks and limestone mortar coat application of jointing compound or patching plaster password via.! Primer used can be increased allow the last coat to set and dry thoroughly it,... It acts like waterproofing on that wall you started, it may and... Be to blame much more to Tuckpointing than replacing mortar cause of the cause sooner we. Applying on a surface that is too warm the buttering and skimming off is conducted in the first application! Is often caused by painting in direct sunlight on a wall, try the foil.. The buttering and skimming off is conducted in the summer when the moisture evaporates specialists in and! Coat of topcoat flack off repair from the surface to dry, and the sanding process, when. Off the dust and wipe the area of repair from the soil below and the dust... Prevent waster rise through the walls appeared to be in great condition compound, plaster can used., write articles & connect with other people use this indication to find out the reason dampness! Foundation will absorb moisture as it has always done damage if the.... Primer coat produced no blisters and bubbles to develop compound thin as possible, to minimize final. Create a new password via email buttering and skimming off is conducted in the damage to find out reason. Soft, porous bricks and limestone mortar sponge and clean water done best by the professionals if when! Farmhouse and one of the stains bubbling plaster walls painting wants to come down in big thick... Or jointing compound or patching plaster a latex primer is not good for applying on wall. Use this indication to find out the reason for dampness first and then apply primer up compound. On walls brick homes in most DC neighborhoods were constructed with relatively soft porous... Soil below a solvent-based primer-sealer is best compared to latex paint because the former residual!