Plaster Cracking When Drying [portable] -

Using a dehumidifier or a fan heater too early is a guaranteed way to cause cracks. Dehumidifiers should ideally not be used for the first 48 hours to avoid pulling moisture from the surface while the core is still wet. Identifying Types of Drying Cracks

Over a taped plasterboard joint or recurring crack, apply self-adhesive fiberglass mesh tape before filling. plaster cracking when drying

Not all plaster cracks are created equal. There are several types of cracks that can occur, including: Using a dehumidifier or a fan heater too

Cracking is typically a result of the material losing moisture faster than its internal structure can support, leading to "shrinkage". Not all plaster cracks are created equal

In summary, plaster cracking is rarely a mystery. It is almost always a predictable result of either the wall sucking moisture away too fast, the plaster being applied incorrectly, or the drying environment being too aggressive. By controlling these three factors, you can dramatically reduce or eliminate cracks, leaving a surface that is ready for paint and proud display.