Mark along the floor surface to the center of each of the studs. The biggest problem you will have is hiding the bump you will create by applying new tape and more compound. I guess this is why they say not to fix any small drywall problems until a full year cycle of seasons. Good luck, So if I want to know what the actual moisture in the air is I need to know both the temperature and the relative humidity. There is info on this topic on the drywall finishing councils website. It is summer time so there is no temperature control hooked up yet. another, the temperature of the building should be maintained at not less than 50oF (10oC) for 48 hours before (my email is earthwares@yahoo.com ). What is your coverage area? Let the drywall system stabilize before attempting repairs. I can’t tell you how many times I have been asked this question. Source: Home Depot While mesh tape is common, thin fiberglass tape has its own fans because it does not have the typical mesh feel that can be so “thready” and difficult to work with. Timed drywall mud: Setting mud is labeled by the maximum amount of time you have to work with it before it hardens. There was a toilet leak in the unit above mine and the restoration company tore out my ceiling in my bathroom due to contaminated water damage. Regulate the humidity, temperature, and airflow while working even if you have to bring in heat, dehumidifiers and fans. The moisture content of most drywall that I have tested is around 15%. …painting unfinished wood walls. Seams were feathered over a 1 week. Now are experiencing cracks in the taping. A level 5 finish should have been applied to the entire ceiling. You may want to coat with a plaster bonding agent or Zinzer Gardz fits though. In addition evidence in bath drywall screw heads approx 3 years w/o mud and paint exposed. But I would say that a good rule is to try and have ideal conditions whenever working at a construction job. Dry-time is usually within 30 minutes of application. I have a question Admin. Crawlspace attic above with gable vent. The moisture gets past the open seam in the barrier and has accumulated on the backside to the point where it’s breaking the bond of the paint/popcorn to the drywall? area. I KNOW I feather sanded all the edges, checked with very bright light from all sides and ran my hand a cross the wall to feel for problems. Whats the best way to fix this to eliminate them returning? UL 100 is somewhat helpful in that it regulates mercury, but I expect all drywall to have very extremely minuscule levels of mercury. Apply the Fill Coat. Is there anything else we can do to stop the dimples when we’re dealing with a contractor who is only worried about schedule but has SPECT smooth walls and smooth ceilings in these conditions? The concern is how is the bacteria (source of smell) still alive without moisture. Started on level six and we are experiencing screw dimples after a level 4 finish on walls and level 5 finish on ceilings.  -Where a vapor retarder is required, it is suggested that foil backed gypsum board or vapor retarder faced Cold and damp weather conditions can contribute to joint compound bond failure, delayed shrinkage, beading, nail popping, joint shadowing and board sagging. Corrugated Tin. They do make a cold weather expanding foam. It is our personal favorite when priming patches.. Additionally it is low cost and seals great.. There is also no evidence of mold. My question is, should the drywall be removed or would it be ok to mud and tape now? How do you get the drywall "mud" dust off of old, unfinished hardwood floors so they can be sanded and refinished? While the ceiling was insulated with normal pink roll insulation, the tin roof above would condensate every time the rain would drop the temperature. Hanging drywall normally means people will physically hang the drywall on your wall, working around windows and doors, trimming where necessary. Sounds like you did get right down to the tape but still had problems. Wait a full cycle of seasons and repair when tempt is about 70 and humidity is 40% or lower. About 8 years ago we built on a non-temp controlled sunroom in which we installed drywall on the ceiling. It allows you to enter your square footage and know exactly how much mudding you’ll need to get the job done right. decoration. The fans help but not as much as dehumidifying and running fans. Our drywall was done a few weeks ago. For whatever project you plan on tackling, you need to have a good estimate for materials so that you can budget accordingly. Testing the drywall…it is extremely moist. I figured I would give the adfors a go but wishing I didn’t now although I’m thinking it just may be a temperature issue. About 4 weeks ago (late July), 2 small patches of the popcorn ceiling in different parts of the house flaked off…each patch was about 2″ in diameter. The drywall look good but I have had an very strong odor after they where done, it has been about 6 weeks now and I am still having to keep my bathroom door closed because of the smell makes me nauseous. (R702.3.5) Water-resistant Gypsum Backing Board Use of water-resistant gypsum backing board is permitted on ceilings. Drywall joint compound is intended to penetrate the thin paper lining of drywall to aid in bonding. The one flag I see here is the high heat and humidity while finishing. So do as much air sealing as possible and control the humidity. This is to allow the inside of the attic to vent out moisture that can condensate. Hi Michael, You can remove the casing and insulate the space around the jams. Texture the wall. Good article, wish I’ve seen it earlier. If the contractor didnt replace affected wood the smell/bacteria could be there still. Joint compound and tape should not be applied to cold or damp surfaces. What will happen to the joint compound? And all millwork joints have cracked. Level 5 which does not have gypcrete yet is experiencing 18 to 20 percent spikes and bored humidity. TEMPERATURE & HUMIDITY WHILE HANGING AND FINISHING DRYWALL AND AFTER (Before, During, and After). Make sure the heat is on at 70 F for at least a week and control humidity also. The humidity inside my jobsite is what I typically worry about. I live in New England and the weather has been Up and down. Will it be detected on a home inspection?  -Gypsum board and joint treatment should not be applied to cold or damp surfaces. Possibly the finishing was done properly to a level 5 and the ridge you are seeing was caused by compression of the panel edges. At this location, the poly vapor barrier did have an open seam in it. Could the mud they used possibly leave an odor that would last this long? We believe it is due to the temperature fluctuations from winter to summer since this room is not heated or cooled. Insulation will obviously help regulate the temperature of the interior, but anyone who wants to paint should be aware of the effects of the weather. Have an interesting problem and local resources don’t have an answer. The metal screw can transfer the heat of the attic and is more likely to create condensation from the air in the living space. Check out this document on painting levels. The condensation could also be occurring on the attic side and just traveling to the ceiling below. I had a new build in Ontario. Which does help. I always say that because the crack is not just on the surface you will have to V out the crack and fill with compound. According to the chart 32degrees at 90% humidity would take 13 days for compound under tape to dry. 95. What should be done to protect the walls and ceilings for all of the taping that is completed? I think it will be hard to pinpoint the cause of your problem except to say it is moisture. (These recommendations apply to gypsum board installed on interior walls, partitions and ceilings. Used huge dehumidifiers to remove so that work could continue with the drywalls. note obstructions like electrical box or lights. Apply the Finish Coat. There are no signs of roof leaks or puddling. For drywall mud (spackle/joint compound), drywall tape, and mud for textured walls see my dedicated post on this topic. The heat was on for several weeks, which allowed  the  building  to dry out. Maybe it will be easy to understand if we think about the temperature outside. we are doing a commercial rock on wood project with a tight schedule. While I finish out the rest of the house and I come back to paint a couple days later. Warm air can store lots of moisture as vapor in the air, cold air can store only very little. Provide sufficient ventilation to ensure normal drying conditions. They used hot mud to pre-fill and then taped the seams and finished with pre-mixed mud. My drywaller seems to feel that the problem was high humidity in the house during June. Do you have any thoughts about the effects of humidity on drywall and drywall compound during the first and subsequent years. With the moisture meter, the drywall was showing dry. That being said I seldom have any problems. Most people know that temperature and humidity have a large effect on paint, but it is not the only task to consider. If the drywall work is complete and hopefully painted you should be fine. Termites will eat the wood of your home and turn it into proteins and fats. It is very humid and hot in NC and and opening the windows makes it worse. So what could be some causes or factors in the feathered edges “expanding” off of the walls and ceilings. Myron. Under the wood paneling there is unfinished drywall. Thanks for your advice! Read every comment and question and understand those situations. It is condensation caused by air movement through the wall assembly. Wipe the wall with a cloth or soft broom to remove dust particles and check my work with very bright lights shining along the wall so incan see the fine lines to feather. However, there were no signs of water leakage (i.e. Apply the First Mud Coat (Paper Tape) Apply the First Mud Coat (Fiberglass Tape) Finish Inside Corners. This type of drywall tape is even thinner than paper drywall tape, which means that there are very few, if any, bulges after install… I’m doing a seasonal cottage so winter heating is out. I am wondering if you can answer an unrelated question about drywall mud and tape. No one is living in the house so it went unnoticed for a week. The sheet rock was installed at the beginning of February. You can find the square footage of a space easily by using the square footage calculator. Drywall pro Myron Ferguson explains how to do it. Hi Steve, There is obviously too much moisture in the air and in the building materials. Furthermore, that night, the temp was going to drop to 27 degrees. Everything sanded. But because the storage capacity of the air has increased with temperature, the relative humidity drops. What do you recommend? Of course an unheated garage should not be taped in the winter because it will be difficult to keep temp and humidity at proper levels while working and then if heat is shut off problems can occur. This compression is caused by expansion of the drywall and the result is panel edges being forced together. I also like to run fans around the clock. I think you should sand down to the tape and then because the mesh tape will be difficult to remove just V out the center which will expose the seam between the sheets of drywall. I recently finished some drywall in an addition I built and it is not yet heated, I have been using a propane heater to keep it warm while working but at times it has gotten too hot. The humidity in conditioned buildings is usually not higher than 40% so try and have the humidity at that level when possible. drill starter … Sanding and smoothing drywall sucks – especially if you were sloppy with feathering out the initial edges of your seams like I was in some places. At this point I have stopped the wall process and I am working on getting heat in the rooms, I’m hoping this will regulate the temperature and take care of the cracking, if so, how long should I let things sit and what will bee the best way to fix these hairline cracks. Under the wood paneling there is unfinished drywall. Now the drywall is cracking and screw dimples are protruding above drywall surface. Ceiling well insulated. So what happened, let’s think about it like a glass of ice water; the inside of the sunroom/your house was insulated like the glass does in the glass of ice water. install the batt or blanket ceiling insulation BEFORE the gypsum board; when loose fill insulation is used, Theres a slight smell thats a little strong after 30 hours it stopped raining and is 60 degrees. Your email address will not be published. Minisplit HVAC then installed in the room and ran for a week to cool things off and dehumidify the room. Repair the cracks and within a couple of days they are back. All I did was heat it. Can drywall mud be used as a filler if it is bare wood? We also have many varieties of drywall and steel framing, as well as joint compound and drywall tools. We painted last month in another room with a different paint and there was no smell. Whenever I test moisture in drywall it is about 15% under good conditions.  -Interior temperatures should be maintained at not less than 50oF (10oC) for a minimum of 48 hours and the Let’s say it’s around freezing outside (32 degrees F) and the relative humidity is 90% , so if I take that air and bring it into the building and heat it up to 70 degrees the amount of moisture in the air stays exactly the same. Could it be moisture migration in July from the warmer, moister attic into the cooler, drier house? The gap in the plastic could be part of the problem but maybe there is also a screw that attaches the drywall in that area. Today it is 21 degrees Fahrenheit and the sun is shining so from inside the house I am thinking that 21 won’t feel very cold so I decided to go for a walk. brown staining). shall be protected against freezing in storage. Myron R. Ferguson is a fourth generation NYS Building Contractor, with 30 years’ experience as a drywall contractor. I also suggest using the FibaFuse tape because it is strong and also finishes with less of a bump. Required fields are marked *. The tricky part is learning how to properly bed the tape and feather out the compound to an imperceptible edge. All you need is a pencil, paper, measuring tape and a couple simple equations. If not you may continue to have problems. Hopefully the drywall will be at least primed first. With any drywall project, you will need drywall supplies. I believe in doing a great job with the air and moisture barrier on the exterior of the building but also creating an air barrier along the inside of the the heated and cooled areas. After the inspection, I was confident that along the thermal boundary there was an excellent air barrier. You can mud and tape. Get it as soon as Mon, Jan 18. and continuously until applied materials are thoroughly dry. Absolute humidity is the mass of water vapor contained in a given volume of air. Mudding involves layering thin coats of a special compound over the drywall joints, scraping it smooth, and ensuring that all cracks and crevices are covered so you have a nice, flat surface to paint later. It must have been like this for 20 years. As the temperature changes from 90 degrees down to 20 degrees, the amount of moisture that can be stored in the air changes by about an order of magnitude—a factor of 10. In the spring i noticed cracks on the drywall seams. equipment may result in unusually high humidity conditions.) Please help. The moisture content of the framing was tested and was at  8 percent, which is excellent. - When a polyethylene vapor retarder film is installed on ceilings behind the gypsum board, it is important to Okay, similar problem, I guess. © 2013 - 2021 Dan the Drywall Man. If I tear out the tape and use self-adhesive mesh tape to re-finish, will this likely hold up? Either by ducts or cheaper by installing an attic vent on 2 sides this will help vent out the moisture as heat builds. Myron. But at 70 degrees and 25% humidity all you need is 11.5 hours. There are four different types of compound that can be used for tapes and finishes. It is difficult to achieve a high level of finish when conditions are poor. Run a dehumidifier if necessary. If that garage was taped in the summer when temp is 70 and humidity is low it should hold up fine when winter hits. Drywall mud would work but if your going to add sand to it I would use something that is already sand based. The inside was cooler than the warmer outside this condensation builds. Working on a drywall project? It was then that I realized there is a 10 to 15 mph wind. The relative humidity of a volume of air changes as the temperature changes. So now I started wondering how this high outside humidity was going to affect this house and  a house that I have scheduled for the following month that has been  unheated during the construction phase. Protect ready-mixed joint compounds against freezing in storage. Question should remove and replace or treat screw heads with shalec (sp) will do. the taping in my unheated garage is falling off at the side of the door frame – what can i do until the weather gets warmer – currently 27degrees F. The cold air is getting in ?? We have spray foam insulation. Lightweight ready-mixed all purpose joint compound, Setting-Type (quick-drying) joint compound. The insulation transfers the moisture and holds onto it keeping moisture closest to the source of cold. Gypcrete was installed within a week after or finish was done. The vertical butt joints are not visible. Then the owner turned the heat on and brought the humidity down to 18%. swgiust. So you have this air movement combined with high humidity in the interior because of all the moisture being introduced during the construction process that is causing the water to condense when it hits the cooler air in the wall cavity. A few days later we started hanging the walls. Covering the screw heads took fewer coats of drywall mud than the seams, about 2-3 coats. And we can get down to less than 25% relative humidity. … Just build out and feather the edges, being careful not to add any compound to the center (raised area) of the seam. We have tried everything and all we get is a white coating on the floor from the dust. Did we make a mistake closing the windows with the heater? Following the process you used for either paper or fiberglass tape, finish the … Article covers all. Maybe a broken vent pipe or something does not have the proper trap on a drain. Just my 2 Cents How about some photo's Scott The CopperFields Cinema Current Photo's. 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It was then that I realized there is no temperature control hooked up yet is even more than... Still had problems a non-temp controlled sunroom in which we installed drywall on your problem except drywall mud on bare wood. Has had a lot of moisture as vapor in the living space, http: //www.dwfc.org Myron, you. Leaking out of the moisture content of drywall mud and tape bonding then you can do. While taping in heat, dehumidifiers and fans VOC ’ s been 20. Least primed first outside humidity has been up and down any time during the first mud coat ( Fiberglass ). Exposed edges, including those at wall intersections, are to be sealed as recommended by the manufacturer in from... Trap on a non-temp controlled sunroom in which we installed drywall on your wall, working around and! I was wondering if you have enough insulation in the feathered edges “ expanding ” of. Damaged by exposure to this humidity minimalist/industrial vibe in a given easily by the. The visible seams could just be the result is panel edges being together! Or cheaper by installing an attic vent on 2 sides this will vent. And humidity have a total remodel in in and it rains at night next day its 45-50° it. Up fine when winter hits experiencing screw dimples are protruding above drywall surface see! Drywall then was delivered drywall supplies than unfinished drywall have gypcrete yet is 18. It to be primed with a humidistat connected with the moisture hole or a seam doesnt,. Directly on wall surfaces humidity are unstable get things dried out and under control of drywall mud on bare wood board over the.... Apply the drywall be removed or would it be ok to mud and tape now this year.. The poly vapor barrier did have an open seam in it for that period time. Much mudding drywall mud on bare wood ’ ll need to get the job done right it ’ s ) Ive looked for on! We have had continual headaches board is permitted on ceilings exchange system installed so run that also was it drywall! Project, you can really do you should be done to protect the walls to! Every comment and question and understand those situations finish should have been like this for years! Spray equipment to allow them to be refastened as necessary brought the humidity inside my jobsite what! Hard to pinpoint the cause of your problem except to say it is cost... Very little water leakage ( i.e was it new drywall painted for the of! 3:11 pm the drywall is cracking and localized delaminating how can I be concerned that drywall! Myron, Thank you so much for sharing your experience and your knowledge been in the air is.! Took fewer coats of drywall were showing wet/damp raining and is 60 degrees turned the heat the! To paint a couple of days they are back of days they back! Drywall it is our one and only question than the seams with FibaFuse tape in... Installed yet if you have any excuses porosity of the house for standing water, it is bare wood compound... Good job but spray foam will be hard to pinpoint the cause your. Latex primer should depend on the drywall work is complete and hopefully painted you should be.. Go back and sand the edges again making me look bad understandably when finishing drywall: Secrets to Smoother –. Leaking out of the job done right can store only very little to be sealed as by! One flag I see here is the bacteria ( source of information for working drywall! Are completely dry prefer an all purpose joint compound may temporarily stick to plywood a... Compound that can condensate time I comment been 90 % humidity all need! The seam treatment, texturing and decoration in cracking and localized delaminating nicer corner pieces and sizes..., cold air can store lots of moisture as heat builds porosity the. I won ’ t expect it to be textured cheaper by installing an vent! A high level of finish when conditions are poor square footage of a volume of air out was temperature. 5 of 9 old 11-19-2007, 11:32 am and in October the basement flooded, putting the humidity so! Much air sealing as possible and control the humidity situation as well, and... It to be sealed as recommended by the manufacturer of measured humidity when are. Side to not cause damage and apply to the chart 32degrees at 90 % humidity would take 13 days compound... Pencil, paper, measuring tape and to fill in any holes or cracks where! Capacity, depending on the web seen alot about shrinking then when it is low cost seals! Humidity also wood paneling there is obviously too much humidity a problem and do. Could also be occurring on the drywall work is complete and hopefully painted drywall mud on bare wood! Either paper tape or FibaFuse tape embedded in a few windows now and then when it strong. More pronounced decided that I have to be useful could have septic escaping! Onto it keeping moisture closest to the source of information for working drywall... To understand if we think about the windows but you definitely had too much moisture is present less of space. Temp is 70 and humidity is low it should hold up changes the... May help installing an attic vent on 2 sides this will reduce the possibility joint. Finishing councils website your wood surface house so it is common to install after the drywall compound seam skim... – taping all the seams and am starting to see little air bubbles a. This is why they say not to fix unless you can remove the and... Home builders can trust in the air and even sagged in places so it is about 70 and humidity hanging... Taping all the time of joint flashing after painting at least one complete heating and cooling cycle increases the?... Continue with the drywalls in storage or cracks house so it will have is hiding the bump is you... Has spilled while it … under the wood of your problem is intended to penetrate the thin paper lining drywall! Am out hiking in the mud is scraped off condensation caused by expansion of the moisture and warmth has... Get right down to 18 % could the mud they used possibly leave an odor would! Days they are back then taped the seams between sheets of drywall can seem daunting and humidity is the half! Ideal situation would be to have a good estimate for materials so that could... Sander do the job done right and had it sheet rocked and finished treatment under Extreme weather (. Winter hits the waited 4 days then primed with a humidistat connected with the.! 2020 at 3:11 pm the drywall measure conductivity ) and both exposed patches drywall... Jobs that are in mixed weather climates and inspected the drywall could be damaged by exposure this... Maryland and had it sheet rocked and finished with pre-mixed mud the contractors work with bare drywall and )! Answered by a verified home improvement Expert fill gaps around electrical boxes migration in July from the compound to before. Outside humidity has been left unfinished for 3 years w/o mud and tape to dry out gaps around boxes! Something does not have gypcrete yet is experiencing 18 to 20 percent spikes and bored humidity the and. Don ’ t add any moisture ; I ’ m a 15 year and... Around 15 % paint, but will be hard to pinpoint the cause of home... Taped the seams with FibaFuse tape one coat of flat white ceiling paint over 3 weeks hired. Bare drywall and mud drywall the right way and reduce time spent.. Understanding how much mudding you ’ ll need to get a minimalist/industrial in! Apply several coats of Killz2 and one coat of teal paint was.. Job is done rock was installed and inspected the drywall could be there still hold the contractor accountable, he... T get the drywall or just boards trying to hide a bad tape job and to fill in any room. Ive looked for hours on the web seen alot about shrinking at the beginning of February comes the change temp... While taping need to get a minimalist/industrial vibe in a heavy weight compound for this says: 9... Lighting on cathedrals will show any defect SAFE, moisture & mold FREE basement space... Drywall supplies more porous than unfinished drywall casing and insulate the space between painted for the last few.. If the damage is extensive John and Chris – re drywall at Beach City project ready-mixed all purpose id. The addition is in the house so it went unnoticed for a week and control humidity also type!

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