How to Repair Plaster Ceiling

A plaster ceiling is a beautiful and durable feature in any home. However, over time, it can develop cracks and holes due to various reasons such as dryness, weakening of the plaster, or shifting of the building structure. In this article, we will provide you with a step-by-step guide on how to repair cracks and holes in a plaster ceiling.

Identifying the Problem

The first sign of a damaged plaster ceiling is usually sagging or bulging plaster. This can be caused by dryness, weakening of the plaster, or shifting of the building structure. If left unchecked, these problems can lead to more severe issues such as structural damage and costly repairs.

Repairing Small Holes

For small holes, you can use a mixture of boding undercoat plaster and pour it over the damaged area. Lift the floorboards in the room above and vacuum between the joists to collect up loose plaster. This should reach from the floor to the ceiling. Prop up the sagging plaster using a flat piece of chipboard or plywood nailed to a length of 38mm-square timber.

Repairing Larger Cracks

For larger cracks, you may need to apply mesh or fiberglass tape over it before spreading joint compound over the top and smoothing out. Apply several thin layers, let it dry, and sand the area to create a flat, smooth finish.

Tips and Tricks

Before applying joint compound or filler with a putty knife, ensure you have brushed out any debris. It may seem counterintuitive, but making the crack slightly wider can help ensure a strong fill. Additionally, cover walls and furniture with plastic and lay down drop cloths to protect them from dust and scrapings.

When to Call in a Professional

While minor cracks are usually nothing to worry about, thicker ones (anything more than 1/10 of an inch) can be a warning sign that structural problems may be afoot. In such cases, it is best to call in a professional to inspect the ceiling and provide guidance on how to repair it.

Repairing cracks and holes in a plaster ceiling is a relatively easy DIY project if done correctly. By following these steps and tips, you can restore your ceiling to its former glory and prevent further damage. Remember to always wear protective gear when working with old plaster and consider seeking professional help if the problem is more severe than expected.

Plaster ceiling