![]() ![]() When you hit lath, stopthe bit won’t go through woodpull out the bit, and drill another hole about 3 inches from the first and about 2 inches from the crack. Strategic procrastination is the secret of period property ownership, as others here will attest. Using a 3/16-inch masonry bit, drill a hole in the plaster about 2 inches from the crack. Or if it is actually a lath wall, then scraping back a divot and applying a stainless penny washer and screw into the lath works well (typically used to preserve historic ceilings). If you do want to keep yourself busy, a simple fix is to drill a small hole through the detached area and inject adhesive or slurry plaster (assuming the plaster IS on stone). The worst that could is that the area detaches and then you can patch replaster at that point. Unless it's a ceiling that may fall on you, nothing bad is likely to happen. I have plenty of such areas in my house that have been fine that way for the 25 years we've lived here. However, the good news is that practical experience tells me to leave them alone. If your walls in your house are ugly or dull because of plaster that is past its prime or not to your taste, you can cover the plaster with drywall. Thirdly, to answer your actual question, you are correct that walls plastered onto stone shouldn't sound hollow and that the cause is likely that the plaster has blown (detached from the stone or underlying coats). You would be amazed how many walls appear to contain turning machines.Though, our pedants would instead pick you up on the fact that plaster directly applied to stone walls would not need laths (these are substrates for bridging hollow areas, such as ceilings or stud walls). There are several ways in which to repair lath and plaster - using modern or traditional techniques, or by learning how to patch plaster.Secondly, congratulations on correctly spelling lath. ![]() If, on the other hand, large chunks of your wall or ceiling are coming away, more significant repair work will be necessary. Simply check them regularly and keep an eye on any new cracks that appear - often simply skimming over them with a suitable, lime-based, plaster mix is sufficient. Of course, if your walls are still in good condition, there is no need to touch them. If you live in a house with lath and plaster walls (likely if your house was built before 1940) then you might be wondering how to repair damaged lath and plaster. How do you Repair Lath and Plaster Walls? Lath and plaster walls and common issues. These mixtures usually used a 1:1:6 combination of gypsum or cement, lime putty and sharp sand for the initial two coats, then equal parts of lime putty and gypsum for the final layer. Later on, it became common to add in gypsum or sometimes cement - this was to speed up the setting process between each layer. ![]() The third layer was commonly made up of lime putty and a fine sand in a 3:1 mixture - or sometimes just lime putty. I have seen plaster and lath wall replacements without removing. The first two layers of plaster that were applied to the lath were usually made up of lime putty and sharp sand in a 1:3 ratio - often with animal hair added in to help bind them. In that case, Ive used wood glue and clamps for that repair. ![]() inch thick drywall boards (either 4-by-8 or 4-by-12 sheets) 5-gallon bucket of. To do this, you’ll need the following tools: 2-inch drywall screws. If you are opening an entire area, like to create a doorway, then do the other side of the wall. Keep hitting the plaster with the hammer until it is all broken up and falling from the lath. (Image credit: Getty) What Type of Plaster Was Used For Lath and Plaster? Once you know that the plaster attached to the wood lath is stabilized as much as it can be, you can then start adding a new drywall over the top of the plaster. Do not skip this step Using your hammer, hit the plaster hard enough to crack it and start it to crumble. Lath and plaster walls were commonplace in house right up until the advent of plasterboard in the 1930s. ![]()
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