Not all homes or even commercial premises have the same type of wall. Some walls are made of plaster while others use lath strips. These walls crack due to various factors. For instance, driving nails through walls to hang pictures can crack the walls. In most cases, the cracks consist of small fissures that can be repaired easily. In many homes, cracks develop when driving nails into walls to hang pictures without using wall studs. Cracks can also develop where drywall sheets hung. In other cases, temperature and moisture changes can cause plaster to crack.
How to Repair Cracks in Plaster Walls
• Use a utility knife to clean crumbled and broken plaster pieces from cracks in plaster walls.
• If the cracks have developed on a warped part of the wall, nail through the plaster and lathe to reattach the wall. This will fill up the cracks in the wall.
• If the plaster paste is in form of a powder, make the paste according to the instructions of the manufacturer.
• Fill the cracks, one at a time using a putty knife. Use a butter knife to fill small cracks.
• To produce the best results, give the plaster enough time to dry. Leave the plaster undisturbed for several hours preferably overnight.
• After drying, use sandpaper to remove excess plaster until the area becomes smooth and even.
• Paint or paper the wall.
• Use mesh or joint tape to make the plaster stick properly on wide cracks. This is an effective way of repairing cracks.
• Make sure the tape is long enough to cover the crack a few inches on all directions. Use more putty on the walls while using a wider putty knife to push the paste deeper into the cracks.
• Push the paste into the crack using diagonal strokes running perpendicular to the wall.
• If the cracks in the walls are too wide, leave the paste to dry overnight before sanding and painting.
Repairing Cracks on Drywall Walls
• Clear out the crack by cutting a trench slightly larger than the trench.
• Use paintbrush to remove dust and dirt from the crack or damaged areas.
• fill the crack using joint compound or spackling putty
• The compound should be applied in two phases because drywall is capable of withstanding more sanding.
• The first phase involves filling the cracks with putty or joint compound. Leave the putty in the cracks undisturbed for a day and then sand afterwards. However, you can immediately sand small cracks and holes after filling with joint compound. Use a fine grained sandpaper.
• The second phase of the putty application is meant to make the filled crack identical with the rest of the wall.
• Like cracks in plaster walls, wide cracks on Drywall walls require more work to repair. Mesh, joint or patching tape come in handy when repairing wide cracks on drywall walls. Cut enough tape to cover the cracks in all directions.
• Utilize a wider putty knife when pushing paste into cracks.
• Wrap sandpaper to a piece of wood and sand the patched area until smooth before painting or applying wallpaper.
• Wrapping sandpaper to the wood helps create a flat surface and prevents trenches and dips from forming on the patched area.
Cracks on walls can be caused by various factors including accidents and poor construction among others. Wall cracks are unsightly and should be fixed as soon as possible to prevent further damage to the wall.