Older homes often have lath-and-plaster walls. Plaster is both a durable and good-looking surface, but there is one drawback: Plaster inevitably develops cracks. Image © Publications International, Ltd. To fill a large plaster crack, remove the loose plaster, then wet the crack and pack in plaster of paris to its full depth. Smooth the surface with a scraper. How to Repair Walls. Pack plaster of paris (or repair compound) into the wet crack to its full depth, and smooth the surface with a scraper or trowel. Latex paint will hide hairline cracks in plaster, at least temporarily. The coverup, though, may last only a few hours or a few months. Small plaster cracks have an annoying way of showing up again and again. It may be smarter to enlarge them and fix them properly once and for all. Making a small flaw bigger may sound like reverse logic, but it's easier to fix big cracks in plaster than small ones. Use plaster of paris, which doesn't shrink as it dries, or purchase premixed plaster repair compound. Repairing large plaster cracks involves these steps: Step 1: Cut away the loose plaster with a utility knife. Turn the knife to make the opening wider and more clean-lined. Remove the debris while preserving the structural integrity of the surface around it. ![]() Things To Do With Plaster Of ParisClean away the loose plaster and dust with vacuum cleaner. Step 2: Mix a thick paste of plaster of paris and water, and wet the crack thoroughly with a paintbrush dipped in water. Pack plaster of paris (or repair compound) into the wet crack to its full depth, and smooth the surface with a scraper or trowel. Let the filled crack dry for at least 24 hours. Step 3: Lightly sand the patch when the plaster is dry with medium-or fine-grade sandpaper wrapped around a wood block. If the crack was wide, replaster it at least once more to make the surface smooth, rewetting the plastered area each time. Let the area dry for at least 24 hours after the final plastering. Step 4: Lightly sand the patch again, and prime it with a thinned coat of paint or primer. Goudy trajan medium free font download. When the primer is dry, paint the entire wall. Whether your walls are made of plaster or drywall, they generally are adorned with moldings. So the next section -- focusing on replacing moldings -- is likely to be of interest.
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