This is virtually unavoidable, so bust out the trowels, mudpans and sheetrock mud and prepare the walls (skimcoat) A little vino and music helps it go by quicker. Keep on mudden. Your blog and all the comments were nice to read. Something in layman’s terms that also covers the obstacles I’m puzzled over. Most paint products (especially paint/primer combos) are formulated to work on walls that have already been painted. Thanks. If you still see indentations or imperfections after the second coat dries, trowel on a third coat. Want even more info? Can I skim coat over paint? so i dont want to mud it that much, i primed it today and ran a coat. It prevents cracks and other issues when the base layer isn’t fully dry. Sarah, what color blue is that wall? It was over an area where I had done some joint compound work. For more on photo licenses and other use permissions, click here (in true UDH style, it’s actually kind of fun and snarky to read). It’s in my recaps in my dining room, but here’s the main post on it. In this situation I’ve had good results adding about a cup of water to gallon of joint compound. It feels dry. Over time, the walls in a house see some major wear and tear. The tip of my taping knife worked great for getting under the bubble and removing the problem. Scrape first coat tight to wall then roll (yes roll) on thinned down top coat. Always a good idea to follow manufacturer instructions (but then again, I also like coming up with creative fixes). Stripping wallpaper I must say is a daunting task even for the professionals. First step, get rid of the nasty popcorn on the ceiling. It may even feel dry enough to sand. Look at the walls after pulling paneling off. If you have too many peaks and valleys, hit … JOHN. My husband has been a licensed contractor since 1982, so this blog brought back memories of problems we encountered when we were first in business. I appreciate your hard work on your walls and the time you took to write your helpful hints. Thanks for the post! For paneling, use an all-purpose joint compound that has been thinned enough to suit your purpose. Ultimately, DIY projects are about learning; you learn once, and then you learn again. Load up the area with mud, wait maybe 10 seconds, strike it all off, then reapply like normal. When I did, it peeled off of the area with the joint compound. If not, the paint will have only a partial bond to the wall and may come off during the painting process, or years later when the wall is taped for cutting-in during a later paint job. And that’s how 2600 words are made. Don’t set your expectations too high would be my advice; even after doing several rooms, I still have imperfections that I see but don’t have the patience anymore to fix (they are small ones, so the only person who would ever probably notice them is me). Knowing when you CAN’T plaster over paint. Then, patch up the area with more joint compound. Your end result is sooo motivational, so worth the work if it ends up looking like yours. After the patch dried, I decided to put a coat of Gardz on the entire wall to seal it up real good and to help the primer and paint go on more evenly and uniformly. Skim and prime and repaint the areas that are causing you some irritation, but don’t worry a lot about it… ceiling paint is ultra flat to hide imperfections on purpose, and most people won’t look at your ceiling very much, so it’s just something that you know about but doesn’t stand out, if you get what I mean. I’m a teacher, and I’m usually not so excited to go back to school in the fall. Use a clean roller to apply the top coat in an upward motion over the mist coat. I haven’t used it yet myself, but I have considered it after watching this helpful video from Our Home From Scratch. I had no previous experience fixing things to this extent before moving in. However, I have a bag of 20 min. I had never even HEARD the term “skim coat” before a few weeks ago, when a coworker was describing the process to me. I’m essentially back in the same position I was several years ago: I’ve run into new problems, and thus had to figure out new solutions. Lightweight compound goes on smoother for me if I thin it out, and that’s what was recommended to me when I first did it several years ago. It doesn’t take very long for this stuff to dry, so don’t worry too much about this putting a lengthy hiccup in your progress. Can u use any kind of primer to seal if to keep it from pitting? Myron Ferguson, “that drywall guy” states that he uses flat white latex paint as his “primer.” I do the same thing. Tag me on Instagram @uglyducklingDIY or use the hashtag #uglyducklinghouse to show off your projects! My dining room wallpaper became “symbiant” with the wall, so I primed & painted right over the top of it! I guess at this point I’ll bookmark you haha. In my experience the setting type compounds are perfectly capable for skim coating. But I found what worked for me, and I wanted to help other people with the info I’d spent hours collecting. Also – we have the lightweight compound. But until I found the right product to help prevent them, I had to do this a lot. I’m soooo happy I found your blog! I’m a dyed-in-the-wool DIYER. It will flake from the walls and take your precious work with it. But your method is always the best way. Does bubbling happen even where drywall still looks fine? Ever.” box is checked. on the web about the need to get to the root cause by digging down and removing any tear in the paper. So good luck with your next project, and I hope these tips helped! It took multiple paintings to cover it all. 1. What is your recommendation from this point? Re-posting content is not allowed, no exceptions. See my post on painting prep after drywall repair. I did wipe the walls down with a damp towel before primering so I don't think that dust was an issue. This works every time for me with the best results. A skim coat can be painted once it is dry. The Gardz helped my issue a great deal. No other local stores carried it, so yeah for Porter!! Where the drywall still looks fine, you’re probably alright not to have to use the RX35 (but it doesn’t HURT the process, so if you decided to go over the whole wall with it, you’re still probably alright). At the time, I was hoping that there was someone out in the web world who could teach me the right way to fix this problem. You can easily scrape down dried ridges with your taping knife, and the last sanding job gets rid of just about everything else. However, if the surface has been damaged, exposed to water or if you have a very shiny paint to cover, some preparation will be necessary to ensure no bubbling develops in the finish when you're done. I’ve learned the same way you have-hopefully getting better each time also and learning about the different products. If the paint is peeling from the wall then you definitely shouldn’t just skim over it. If done correctly it’s the way we do million dollar mansions. I found info. Yes, prior to skim coating, I began by sealing off the old paper. It all looks so easy on You tube but the reality is different. That’s definitely the more infuriating part, so I feel ya on that! Not one that talks to me like I’ve already done this 100 times, and not one that only gives me half of the information I need. Cover doorways with plastic sheeting—held in place with painters tape—to contain the splatters and plaster dust within the room where you are working. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. If it does, the edges will be dry in about a half hour anyway, then just come back and skim those areas with your 6. ive got some ceilings to skim tommorow. But instead of sanding by hand and looking like a ghost, I now use a shop vac and get rid of most of the drywall dust right from the start thanks to my Hyde drywall sanding kit. This is because walls which have paint that is no longer in good condition will either need repairs or a professional may need to strip the paint first. Great information! ), and now, prepping for painting. But lately, I’ve heard good things about a couple of painting products that do not require separate priming before use. The first attempt to solve this problem was with oil primer. It definitely sounds important to make sure you give yourself enough time to do this and to do it right. There have been other tips I’ve come across that I haven’t yet tried myself, but am open to trying now that I’m on the last room I need to fix (for a while, I hope). Good luck! I would not use such a primer for walls that have been partially mudded or skim coated. What if your walls don’t look right and the paint is really old? It’s not perfect, and I’ve heard Gardz is even better, but the convenience of finding the right product is often just as important as knowing what it is in the first place. I haven’t ever tried spray texture so I can’t say for sure, but I would think you would need to seal it first or the texture might bubble in weird ways (but texture hides a multitude of drywall sins, so it might not). I’ve only used the RX-35 as a sealer, not a paint primer, and the residue is kind of tacky to the touch when dry… if you try it, let me know how it performs! Once dry, the wall can be painted, wallpapered and otherwise decorated as normal. over paint, soap actually makes the mud worse....because it makes it to where it don't stick to the paint..it is a reaction when going over acrylic paints, eggshell, satin, semigloss...the paints are made to be washable.. i got ya.. this site is good.. im always up for learning new tricks from pros.. like i said ive been doing it 15 years but u always learn something new every day.. and u cant find out if u dont ask. I thought I’d gotten rid of any problem areas. After all, it’s better to remove them rather than seeing the bubbles in your paint job (spoiler alert: they only become more noticeable). This how to skim coat trick is a great way for anyone from DIYers to contractors to apply a skim coat to drywall and plaster walls or ceilings. So…..I had extensive drywall paper damage after removing beadboard that had been glued to the drywall–similar to the problems you outlined in your original post–and I tend to regret undertaking the process to “restore” the area of drywall in question. Totally new to all this… :-/ Thanks! Put on the second coat like the first, cutting in around edges, … mud pan and taping knives: the smaller 6″ taping knife is great for mixing mud and skim coating small areas such as a window sill. Actually, level 4 includes all steps taking of coating and coating again with the joint compound over the joints and angles to create an even level. Hi! One more example (an example to be avoided) of the effect of latex paints on drywall mud is the “hatband” effect that people get when a paint brush is used to cut-in when painting the area where a wall meets a ceiling. :). In the first tutorial, I shared some info on what kind of joint compound (aka “mud”) to look for and where to find it. Once the mist coat has dried, you can apply two layers of the top coat of your choice. The water in latex paint does the same thing, but on a “micro” basis. Cue the sad trombone. Red dot all purpose has glue or adhesive mixed in and works well over painted walls. I’ve experienced a world of difference with using this before applying joint compound… far less bubbling (aka “rage-inducers”). I took down my wallpaper and am having a painter coming to spray texture for me. It took me many tries before figuring out what worked best for my walls. Trowel off each successive layer at a right angle to the previous one. I’m a chatty person by nature, and blogging just seems to fit, so I’ll throw in some crazy shit that has nothing to do with DIY every now and then too. I didn’t really find either of the types I’ve used all of that difficult to sand, but I did notice a difference between mixing and not mixing when it comes to sanding down the wall (on one or two occasions, I’ve been too lazy to mix up a new batch and have slathered the stuff on to fix a tiny mark in the wall, only to see it do this weird ridge-like lump after sanding). Of course, that also means you learn more new tricks and tips as you do the same projects over and over. Skim coating is a quick and simple solution for repairing damaged walls. It looks like the problem has been fixed. Hi Sarah! Now, I see so many dings, lines, scratches in the ceiling that need to be gone!!! That’s what removing wallpaper did for me! And I understand your desire to procrastinate on it… now that I’m on the final room that needs skim coating, it’s taking me FOREVER because of how much I hate doing it now. Very little sanding I used to use the sander attachment you use but upgraded to a power pole one from Amazon cost about $150. After the skim coat has been applied thoroughly on the entire vehicle and has been allowed to dry properly, then you’re ready to sand the filler to smooth it out and allow for painting. Now it’s sanded and looks great but I’m concerned that the bubble might reappear when I prime. If we had, had your tutorials before hand I’m sure things would have come out more smoothly (pun intended), but hey you don’t know what you don’t know I guess right? In a similar way, they suggest you to not use paints with textures such as eggshell or knockdown, as that kind of defeats the whole purpose of the flatness of a skim coat. There is an “easy-sand” joint compound product that also dries in 45 minutes. Green Dot or topping mud is exactly that ,top coat and easy sand . First time was right after my divorce and I made my kitchen my divorce project and fucked up my butcher block sink hole. Since this is pretty much a novel at this point, why not add a conclusion, right? Welcome to the mudslingers club. Learn how your comment data is processed. If I ever get the @! Cover the floor with a canvas or plastic drop cloth. I got so lightheaded the last time I used it that I hate to buy another gallon. Love ya work and not even sure how I ended up here but glad I did :-). As I mentioned above, putting more coats over a bubbled area doesn’t really help matters much since it just wets the paper again (which actually runs the risk of bubbling more), so the best way to get rid of a bubble is to get rid of the paper that’s causing the issue. Remove all furniture from the room. Thanks for your blog! No bubbles. Ouch . The skim coating process involves applying a thin coat of joint compound to a divot in a wall to fill and cover the imperfection. Maybe I’ll build up some ambition by Christmas break! I think you should definitely prime the new drywall. While I haven’t started the repair process, I am going to abandon my plan to used oil based primer and opt for the rx 35. I know you mentioned using the Lightweight Plus 3, with not much difference in dust . Would you want to continue to get emails the day (or day after) they are published, or would you prefer to get a single email each week that contains all of my latest updates? I just have spots here and there, but mostly kept the drywall intact. I’ll be right here when you get back. Its purpose is to essentially harden the loose drywall paper, making it that much more unlikely to cause bubbles. I considered chopping it up into smaller bits, but when I look for tutorials, I don’t like having to click around a lot. Put mud on, take it off completely, then coat it heavier and you should not have any bubbles. Anyway, everyone has just been telling me “oh yeah, once you get the wallpaper down you can texture it and you’re good to go!” I kept thinking to myself, “but I want smooth walls, not texture – does the word mean something else in this context?” So I finally googled it last night and sure enough, everyone has apparently been telling me that I should do some sort of faux finish which will hide imperfections, but unfortunately that’s not what I want. Have you tried a Mudd Trowel & Hawk yet? Thanks so much, Raul! The main floor is finished, but I have an entire second floor with cathedral ceilings left to do…someday. So happy I found your blog- it is just what I needed! The hardness of it is the draw, and especially useful on new drywall seams. P.S. Yes! My opinion differs from yours in the choice of primer. Again, it’s not a miracle cure for everything, but does do the job for me on the smaller scratches where I worry that they will show up in the paint job. If you’re just starting out with skim coating, you should still read my first tutorial here. You also get FREE access to my plans & patterns libraries! I’m about to throw down primer this weekend with an airless sprayer, first time using it, hope it turns out good. I’ve had pretty good results with other Zinsser products before, so I went on the hunt to find it. Thanks! In large contractor quantities. I forget the name, but I know that details are here. Using a paddle mixer can be extremely helpful if you’re doing a lot of application in a single day. HI Sarah, I just found your piece on “more skim coating tips” when I had a bubble pop up after priming over a skimcoating job I had done in my basement. I think they would be fun to try out, but I’m also pretty sure my small frame means I’d look somewhat like a garden gnome using a snow shovel. If I have this problem again, I will make sure to dig down below the bubble(s) and then put the Gardz on to address the underlying issue. Good luck to all! Read my full disclosure here. But like you found out tearing down the wall paper reveals old patchs , a lot of glue. If you want a plain wall and you've tried in vain to strip off the old wallpaper, you may be able to mud over it. I found a product that was available at my local Orange called Rx-35. None as thorough as yours. The only way to fix a bubble is to remove it and the offending unsecured paper that’s causing the bubble. The skim coating process involves applying a thin coat of joint compound to a divot in a wall to fill and cover the imperfection. Before you can skim coat wallpaper with a layer of joint compound, you must test the procedure in a small area. Will it EVER end?!!! Skim coating as a process repairs the wall by filling up dented regions and uneven surfaces by applying an appropriate compound. We have been using it for years with consistent results. Don't scrape your painted popcorn ceiling. After removing the wallpaper, Monroe mixed up some drywall compound and used a drywall taping knife to apply a thin skim coat over the wall surface. This year, I couldn’t wait! Loved reading your experiences at home improvement!! The back-and-forth motion of the brush leaves a pattern in the mud at the top of the wall that is called a hatband. I am soooooo not looking forward to this process but at least I feel a little better about starting it. We recently purchased a house with a very thick texture on the living room walls and ceilings. (I also tend to forget masks/respirators in the process of getting stuff done. And then, once again, pass this new knowledge on to you. i've heard sanding the paint with 80grit works (but haven't tried it), and I'm curious if running over the surface with one of those round topped red zinnser wallpaper scorer things would help (since its the paint's refusal to let moisture into the board that bubbles the mud). Thanksgiving. Great, that’s exactly what I needed to know. It sucks up the dust so well that I don’t feel like I’m putting myself in harm’s way when I can’t find my dust mask (PSA: you should probably always wear them. Please ensure you are following proper guidelines with anything used, and seek professional advice if you don’t know how to do something! But I learned that you don’t really have to. I’ve also used it for backsplash tile prep. I'm Sarah. My favorite things: 1) tearing my house apart and 2) putting it back together again. Wallpaper brightens up a room and adds an element of style, unless you don't like the pattern or the color. Their advertising blurb says, “Rx-35 Sealer/Primer repairs torn drywall to create a wall surface that can be floated, spackled, painted or hung with wallpaper,” so what I’m thinking is she believed I bought R-35, not RX-35 – two different things.

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