Why does plaster fail?
Fail, like breaking away in patches, we mean. Common dissolving, thinning and roughening by the action of aggressive water we dont mean. Thats your fault, unless you just got the job But these days we see more and more of the former, a phenomenon called spawling, where small areas in the plaster seal coat – from the size of your hand to patches a few feet across – just let go and fall away, leaving unsightly and abrasive holes which often initiate budget searches for a new plaster job. This problem shows up very, very often in re-plaster jobs interior linings subsequent to the first (and usually the best) plaster application. Strong, detailed rehab specifications, demanding extremes in preparation, often do not exist; indeed some of you use the free specifications offered by the plaster contractors themselves. (They arent free) If simple sandblasting or acid washing or both are used, the prepped surface is often still smooth. And some of that new plaster is coming off, falling out like
