The wall was rendered, and then painted; within 3 months the paint had bubbled and flaked, now 2 years later it looks worse than it did before the job was done!
In my long experience in residential paint there are only three things that will cause paint to bubble, blister, and peel. 1. Moisture, 2. Moisture combined with Sun/Heat, and 3. Moisture. In most cases of bubbling/peeling over a freshly floated wall it is the fact that the mud has not completely cured - not surface dried - but cured through and through. If this is not the case and you are 100% sure, then check for moisture getting in or on the surface before you painted. i.e. If the mud has 100% cured and it is cold in the house/hot outside (or vice-versa) condensation has entered the picture and moisture blisters was the result. Running a propane/kerosene heater in the room(s) will add 1 gallon of moisture to the area (and therefore the walls) for every 4.5 gallons of propane/kerosene burned. If none of these factor in, then you should check for another source of moisture, for instance a leak in the wall or ceiling. Hope it helps, CS
Sorry for the paint peeling and bubbles. It's not the drywall tape that has bubbles... right? Paint can react like this when it is applied over a sanded wall that has not been cleaned and still has a layer of drywall dust on it. When primer is applied to the wall, it is best to use something to push the paint on the surface to combine the dust with the paint. This could be done using a paint pad but should be more than just rolled on. The paint needs to mix with the dust and stir it in with the paint so the paint get under the dust. You might try thinning the paint a little to allow for better attraction to the wall. So now how do you repair this? By scraping the loose paint off and starting with a new coat. You know. it could also just be bad paint.
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SOURCE: Drywall needs to be painted
If you have tape and joined the plaster board then get your paint you will need to miscoat first let it dry any imperfections will then Show a bit better use some poly filler sand when. Dry give second coat let dry then final coat and should look as good as a professional job if you arnt very experience d use matt emulsion as is easiest to paint with
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