In my experience, any other method will eventually open-up on you. Mix 5-minute mud powered with water. With plaster, your best bet is to preserve the existing plaster and to fix it, rather than tearing it out. I then used my fingers to texture the excess caulk in some places where not much squeezed out I actually applied more to the surface as close as I could to the existing texture. I just rocked my third ceiling.
You can also minimize the appearance of the crack by applying a small amount of thin drywall compound under the loose tape and re-adhering it to the drywall. The only luck I've had is more of a cover up than a repair. Plus, it's just a god-awful amount of sanding for the issue I have. If you have wider cracks or sections of loose plaster, the lath system beneath the plaster is likely failing—in which case, the plaster should be removed and replaced with drywall. This last coat should take the joint compound out as far as 12 inches.
If you still have fabric-covered furniture in the room, consider putting drop cloths over them to avoid permanent damage. If the ceiling crack extends beyond the template, drive in a few screws on each side of the crack. I bought the spray can stuff and tried it outside. Apply mesh drywall tape directly over the crack. .
Apply a second coat of the mud. After the taping is done, the trickiest part of the job -- matching the existing texture -- begins. I have sheetrock ceilings and they first got long cracks in them and now the sheetrock is actually starting to fall. If you do this you will have problems later on. Slide shims beneath the ceiling joists to force down the backer boards.
Successful plaster crack repair means taking it slow and being patient enough to add multiple layers of joint compound to the wall. Important — this tape must be flat and straight. The house is forty years old and I am told this happened when someone walked in the attic and cracked the ceilings. Do not lean heavy on it, you do not want to damage the fragile mesh tape. Where the sheetrock crack is the sheetrock has dropped down about a inch from the ceiling.
Practice moving the compound from trowel to knife and back again. After a day to dry I painted the ceiling. We live in Northern Ontario and we are absent from the house from November to April with minimal heating of 45 degrees. Again, take care not to sand down into the paper tape—a very light sanding is all that is required. Hairline cracks are typically ultra-thin, literally as wide as a piece of hair.
I would see if it is covered by your warranty. These superficial hairline cracks can usually be re-taped—but, if the house continues to settle, the cracks are likely to reappear in the same spots. I am a professional, I have done this for 20 years. Spread drop cloths on the floor, and set a sturdy stepladder under the section of the ceiling you want to repair. If your ladder has a fold-out section across from the top rung, you can use this to hold your tape, mud, and other repair supplies. If the store has a variety of tapes, make sure to purchase an adhesive version. You can cut the tip for a small opening.
Level it with a 12 inch knife until it's nearly flat, then on the last coat skim it over and smooth with the sponge. If you know what you're looking for you can still see the seam, but if not it blends in very well. Do not worry the more you scrap off the better. Then, scrape off the loose tape and re-tape the joint, either with a drywall repair kit or paper tape and joint compound. Matching the texture applied to the ceiling is often more difficult than performing the repair. If sound, I first use a clean spray bottle and soak the area to be repaired with clean cold water heat will make it set fast ,soak it until it drips. If you have ever repaired , you may know that it is often easier to replace entire portions with new pieces of drywall—it's possible to remove just the section that needs fixing and a few inches beyond, without the entire wall collapsing.
This is because using something that is liquid allow you to penetrate the crack and fill it completely, yet it still dries to a finish that you can paint over. Good Luck The proper repair requires that you scrape off the popcorn on both sides of the crack. In addition to posting comments on articles and videos, you can also send your comments and questions to us on our or at 800 946-4420. They are very deep and all across the ceiling. Hairline cracks can happen virtually anywhere, but they are most common where the two pieces of drywall meet in the ceiling. Did you ever wonder how you can? This leaves a smooth edge on one side and a small build up of material in the middle where the tape is.