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. Hi Kim, With all the expanding and contracting added to to humidity changes I would say the mesh tape will not hold up much better. and continuously until applied materials are thoroughly dry. If I tear out the tape and use self-adhesive mesh tape to re-finish, will this likely hold up? It is summer time so there is no temperature control hooked up yet. Now I have to factor in the wind chill so it is actually much colder than 21 degrees. Myron. The absolute humidity of that volume of air does not. gypsum board should be completely dry before taping and finishing. Of course once taping begins moisture from the compound and added water increases the moisture in the air. Whenever I test moisture in drywall it is about 15% under good conditions. Maybe even opening a few windows now and then when it is cold outside to dump some of the moisture in the air. 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. Mark along the floor surface to the center of each of the studs.  -Interior temperatures should be maintained at not less than 50oF (10oC) for a minimum of 48 hours and the While I finish out the rest of the house and I come back to paint a couple days later. Most paints today have pretty low VOC’s. Hi Bob, Whenever I see a painted surface discoloring or coming loose it is because of moisture. What did the insurance adjuster have to say? Hi Bob I have a theory on your problem. I am wondering if you can answer an unrelated question about drywall mud and tape. Will it be detected on a home inspection? Question should remove and replace or treat screw heads with shalec (sp) will do. I have a total remodel in IN and it’s been around 20 degrees inside and out. How can I be sure whether or not damage has occurred? Maybe a broken vent pipe or something does not have the proper trap on a drain. Humidity should be below 45% and have fans running all the time. May want to check moisture content of drywall before taping. I live in New England and the weather has been Up and down. Most attic spaces have attic vents at two or 4 ends of the house depending on the size. - Answered by a verified Home Improvement Expert and resolve. equipment may result in unusually high humidity conditions.) For gypsum Ceiling well insulated. The bulges were the entire length of the seams, about the width of the drywall compound seam. Drywall mud would work but if your going to add sand to it I would use something that is already sand based. I guess this is why they say not to fix any small drywall problems until a full year cycle of seasons. 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. The temperature has been normal in NC but is supposed to drop to 20s. Sounds like the condensation occurred on the living space side only caused by the warm temps of the attic somehow reaching the cool air of the living space. I haven’t really heard of this before. That being said I seldom have any problems. Hopefully the drywall will be at least primed first. If worried about compound and tape bonding then you can seal with a bonding agent first. "First… textured. But I would say that a good rule is to try and have ideal conditions whenever working at a construction job. I didn’t expect it to be that  high. I chose this method for a few different reasons. Would certainly have the owners put a pencil size hole through the ceiling and smell the hole to see if the smell is coming from above and repair hole with spackling and touch up paint. We had the drywall person hang and tape a 24 by 32 addition with2x6 studalls and a valued ceiling. The drywall mud calculator does just that. This is common in cold weather construction. I do this in rental houses with smokers. Get things dried out and under control. We are refurbishing an 80 year old home and this is our one and only question. It allows you to enter your square footage and know exactly how much mudding you’ll need to get the job done right. Thus check the moisture between the insulation and the ceiling. They have different advantages for different jobs and range in price as well as application. For information on joint treatment drying conditions, see Joint Treatment Under Extreme Weather Conditions (GA-236). If I put those two pieces together, (temperature and  relative humidity)and then refer to a psychrometric chart the absolute humidity can be calculated. Started on level six and we are experiencing screw dimples after a level 4 finish on walls and level 5 finish on ceilings. Thanks for the great insight on drywall. Instead buy nicer corner pieces and more sizes of putty knives. Mix outdoors. My question is, should the drywall be removed or would it be ok to mud and tape now? …painting unfinished wood walls. 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. I remodeled a house adding a second story. Just build out and feather the edges, being careful not to add any compound to the center (raised area) of the seam. At this location, the poly vapor barrier did have an open seam in it. I think it will be hard to pinpoint the cause of your problem except to say it is moisture. 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. I don’t think the smell has anything to do with the drywall work. I dry walled throughout. The relative humidity of a volume of air changes as the temperature changes. Under the wood paneling there is unfinished drywall.  -When a temporary heat source is used, the temperature should not exceed 95oF (35oC) in any given room or We do not have a backdoor yet and the insulation keeps it constant at a very low temperature even though it was up to 79 today. It  has been in the single degrees in the evening . 4.6 out of 5 stars 345. Whats the best way to fix this to eliminate them returning? Hello, I’m remodeling an add on that was built in the mid 1980s. Good luck,  -The use of setting type joint compounds can help avoid many cold weather related finishing problems. Required fields are marked *. Myron. Finish Outside Corners and Screw/Nail Heads. W00lly is offline Quote.  -Where a vapor retarder is required, it is suggested that foil backed gypsum board or vapor retarder faced Nothing read here applies to my situation. Did we make a mistake closing the windows with the heater? 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. When finished it will be necessary to skim coat the entire ceiling to equalize the texture and porosity of the ceiling. Cut or exposed edges, including those at wall intersections, are to be sealed as recommended by the manufacturer. Tear out the drywall and start over? - When a polyethylene vapor retarder film is installed on ceilings behind the gypsum board, it is important to Thanks, Hi Thomas, It is not only about the temperature but also the humidity and airflow. Gypcrete was installed within a week after or finish was done. Furthermore, that night, the temp was going to drop to 27 degrees. Level 5 which does not have gypcrete yet is experiencing 18 to 20 percent spikes and bored humidity. My question is what should the drywall be in terms of measured humidity when we are applying joint compound. What is your coverage area? Going to foam all next week Fans were runs to help circulate the air and even  some windows  were partway open  to help dump humid air created while taping. I discovered in my studies the following: Relative humidity is a ratio of the actual water vapor content of the air to the amount of water vapor needed to reach saturation. Fill any gaps larger than 1/8 in. 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? Reply. Good article, wish I’ve seen it earlier. You may want to coat with a plaster bonding agent or Zinzer Gardz fits though. After 3 coats of mud the joints kept cracking on the ceiling, I tried pulling the tape off of one of them and using paper and the others I sanded down to the mesh and used 45, all looked great where the 45 seemed to be much stronger, I thought I had fixed the problems until I primed it, they all work there way back. More on finishing drywall: Secrets to Smoother Drywall – Dead-flat walls take more than good taping techniques. Either by ducts or cheaper by installing an attic vent on 2 sides this will help vent out the moisture as heat builds. Let the drywall system stabilize before attempting repairs. They start with careful planning and solid installation strategies.  -Where materials are being mixed and used for joint treatment or the laminating of one layer of board to I moved in at the start of May. Excessive localized heating can cause joint compound to dry too rapidly resulting in cracking and localized delaminating. I had a new build in Ontario. TEMPERATURE & HUMIDITY WHILE HANGING AND FINISHING DRYWALL AND AFTER (Before, During, and After). For whatever project you plan on tackling, you need to have a good estimate for materials so that you can budget accordingly. 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. Your email address will not be published. This water based primer is great for sealing bare drywall.. I’m a 15 year remodeled and occasionally I have drywall jobs that are in mixed weather climates. We noticed water leaking out of the bottom of one of the walls. Hope this helps get you closer to solving your problem. Thanks in advance. The first is because texturing is an easy way to hide a bad tape job and to add some dimension to the wall. The cause is alternating periods of high and low temperatures and humidity extremes due to the thermal and hygrometric expansion differences of the different building materials. Used huge dehumidifiers to remove so that work could continue with the drywalls. Just my 2 Cents How about some photo's Scott The CopperFields Cinema Current Photo's. What will happen to the joint compound? admin says: July 9, 2020 at 3:11 pm Get it as soon as Mon, Jan 18. What should we do? post #5 of 9 Old 11-19-2007, 11:32 AM. Eli | shpaintingpa.com, I am not exactly sure what you are asking. The tricky part is learning how to properly bed the tape and feather out the compound to an imperceptible edge. You can mud and tape. The cross lighting on cathedrals will show any defect. Not sure about the windows but you definitely had too much humidity. Ready-mixed joint compounds and textures You may have to apply several coats of drywall mud, depending on the condition of the wall. I would recommend considering a ventilation addition to the Sunroom. All I did was heat it. Corrugated Tin. Hi Michael, You can remove the casing and insulate the space around the jams. Fill gaps around electrical boxes. The inside was cooler than the warmer outside this condensation builds. mark obstructions on drywall with pencil. With any drywall project, you will need drywall supplies. Even a slightly raised area will be visible under certain lighting conditions. Took moisture meter up and the drywall on the finish painted rooms is spiking at 22 percent which is as high as my meter goes. Having same problem on level 5. 15% or lower should be fine. All is well for 2-1/2 months. It will most likely crack along the seam.. With the moisture meter, the drywall was showing dry. Drywall pro Myron Ferguson explains how to do it. (Note: Gas-fired heaters generate considerable quantities of water. Water vapor in air has a maximum storage capacity, depending on temperature. This is what is used with drywall tape and to fill in any holes or cracks. After telling the homeowner it was ready to paint I have to go back and sand the edges again making me look bad understandably. When the wall is ready for taping, their job is done. You may want to hire a professional building performance contractor to help evaluate the problem. I do know that because of the difference in textures and porosities of the taped areas and the paper face the edges can show after painting. Drywall joint compound is intended to penetrate the thin paper lining of drywall to aid in bonding. But because the storage capacity of the air has increased with temperature, the relative humidity drops. Some garages have exhaust fans with a humidistat connected with the switch. Read every comment and question and understand those situations. Make a paste on the very dry side to not cause damage and apply to the area affected, remove and wipe clean. I now notice some of the seams and am starting to see little air bubbles in a few spots. After the insulation was installed and inspected  the drywall then was delivered. The metal is attached directly to … I’m not going to lie. Do we even have to worry about getting it up or will the floor sander do the job for us?  -The proper thicknesses and types of gypsum board should be used to avoid sagging when ceilings are to be The concept of this step is simple: Every time you add drywall mud to one of the joints, you’re going to lightly sand the wall after it dries to get it as smooth as possible. Most people know that temperature and humidity have a large effect on paint, but it is not the only task to consider. Immediately, the mud is smoothed across the surface, then excess mud is scraped off. Are the walls insulated? I hired a contractor to put up an addition. - not less than 50oF (10oC) for adhesive application of gypsum board and for joint treatment, texturing and There is info on this topic on the drywall finishing councils website. http://dwfc.org/wp-content/files/2007_09_12_DWFC_Levels_of_paint_finish_-_FINAL.pdf I am having a house built and the drywall has been completed. Myron R. Ferguson is a fourth generation NYS Building Contractor, with 30 years’ experience as a drywall contractor. I didn’t get the home finished before the winter so it sat through the winter without heat. So constant fluctuations in temp and moisture are a given. Drywall should be 0 VOC (the best ones), and in theory, do not give off formaldehyde. Subsequent finishing and texturing But at 70 degrees and 25% humidity all you need is 11.5 hours. I just finished taping a house yesterday and the temp and humidity will be very high the next few days and I am not worried. This compression is caused by expansion of the drywall and the result is panel edges being forced together. Where materials are being mixed and used for joint treatment the interior temperature of the room should be maintained at not less than 50 degrees Fahrenheit (10 degrees C) for 48 hours before and continuously until applied materials are thoroughly dry, and after to insure quality results. The termites live in the mud tubes due to needing to return to the earth for moisture and warmth. The concern is how is the bacteria (source of smell) still alive without moisture. Hi Myron; I really enjoyed your article on humidity and drywall. There are no plumbing lines in the vicinity. drill starter … Sounds like the seams are not cracked so just feathering out the bump is all you can really do. Making me look bad understandably the width of the house for standing,... To figure out was how temperature, relative humidity drops homeowner it was ready to a. 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