Use setting-type compounds to avoid many cold weather related problems. Drywall pro Myron Ferguson explains how to do it. Whenever I test moisture in drywall it is about 15% under good conditions. We checked under the house for standing water, it is dry. - When a polyethylene vapor retarder film is installed on ceilings behind the gypsum board, it is important to It must have been like this for 20 years. If that garage was taped in the summer when temp is 70 and humidity is low it should hold up fine when winter hits. (R702.3.5) Water-resistant Gypsum Backing Board Use of water-resistant gypsum backing board is permitted on ceilings. We have had a lot of rain and humidity for the last few weeks. The metal is attached directly to … There are many different techniques, but I chose to apply the mud with a drywall knife and to give the wall a troweled type finish. All you need is a pencil, paper, measuring tape and a couple simple equations. Rob, So i built a spec home in maryland and had it sheet rocked and finished. How Many Coats of Drywall Mud Do I Need? Provide sufficient ventilation to ensure normal drying conditions. Dripping in some areas. If the ceiling is larger, 20 ft or more then installing and expansion joint may help. 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. install the insulation IMMEDIATELY after the gypsum board. 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? 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. No mud and tape but looks like a light coat of teal paint was applied. Hi Mitchell, Our 20 year old house in MN has popcorn ceilings. TEMPERATURE & HUMIDITY WHILE HANGING AND FINISHING DRYWALL AND AFTER (Before, During, and After). Air is moving through the walls and ceilings because not enough attention was paid to creating an air barrier. The moisture content of the framing was tested and was at  8 percent, which is excellent. I think it will be hard to pinpoint the cause of your problem except to say it is moisture. If I tear out the tape and use self-adhesive mesh tape to re-finish, will this likely hold up? The drywall mud calculator does just that. 4.6 out of 5 stars 345. Wait a little bit for any fumes to dissipate and paint. There is info on this topic on the drywall finishing councils website. To better understand temperature and humidity I decided that I needed to study my building science . Our only other option is to put some type of wood board over the drywall or just boards trying to hide the ugly seams. This type of equipment can be rented at rental yards or even at some home improvement stores. Depending on the room temperature and humidity.. Even a slightly raised area will be visible under certain lighting conditions. Finish Sand. Was it new drywall painted for the first time? The reason I was surprised that the humidity was so high is because I had always heard that cold winter air is dry. I had a new build in Ontario. Somehow gas from the sewer is not venting out properly. 95. It actually feels like 10 degrees – Brrr.  -Where a vapor retarder is required, it is suggested that foil backed gypsum board or vapor retarder faced New drywall and mud installed in high heat, high humidity (summer was brutal this year). Possibly the finishing was done properly to a level 5 and the ridge you are seeing was caused by compression of the panel edges. I do this in rental houses with smokers. So what could be some causes or factors in the feathered edges “expanding” off of the walls and ceilings. The drywall mud calculator does just that. Drywall was completed in Dec and Jan. and primed and painted in Feb. Required fields are marked *. But because the storage capacity of the air has increased with temperature, the relative humidity drops. At this location, the poly vapor barrier did have an open seam in it. Article covers all. You can find the square footage of a space easily by using the square footage calculator. Excessive humidity this Spring as building was being enclosed. I will prime next week. 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 ?? swgiust. For drywall mud (spackle/joint compound), drywall tape, and mud for textured walls see my dedicated post on this topic. About 8 years ago we built on a non-temp controlled sunroom in which we installed drywall on the ceiling. I was surprised to find a worker applying joint compound when the temperature was 37 degrees outside, and no heat in the addition where he was mudding. Use a taping knife: A series of six or eight dabs of mud are applied, each about 3 to 4 inches in diameter. sheathing recommendations, see Recommended Specifications for the Application of Gypsum Sheathing (GA-253). If worried about compound and tape bonding then you can seal with a bonding agent first. We have tried everything and all we get is a white coating on the floor from the dust. Don’t think I have experienced this. Cold and damp weather conditions can contribute to joint compound bond failure, delayed shrinkage, beading, nail popping, joint shadowing and board sagging. Thanks for your advice! What did the insurance adjuster have to say? 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. The temperature should not be lower than 55F at any time during the day and should not fluctuate up to real high temperatures either. You may want to coat with a plaster bonding agent or Zinzer Gardz fits though. 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. Observing the following precautions during periods of cold and damp weather will reduce job problems. According to the chart 32degrees at 90% humidity would take 13 days for compound under tape to dry. Sounds like the seams are not cracked so just feathering out the bump is all you can really do.  -Interior temperatures should be maintained at not less than 50oF (10oC) for a minimum of 48 hours and the 7 days to let everything dry. They used hot mud to pre-fill and then taped the seams and finished with pre-mixed mud. There are corner drywall knives, but I’ve never found them to be useful. How do you finish unfinished drywall? install the batt or blanket ceiling insulation BEFORE the gypsum board; when loose fill insulation is used, But I would say that a good rule is to try and have ideal conditions whenever working at a construction job. I was wondering if our choice of primer should depend on the temperature and the humidity situation as well. The builders removed the deadbolt from the door due a problem with it over a week ago. Thanks in advance. It is condensation caused by air movement through the wall assembly. Covering the screw heads took fewer coats of drywall mud than the seams, about 2-3 coats. And all millwork joints have cracked. Ceiling well insulated. It has been a damn cool spring so we have had days where it is below 50 degrees with dew points at 46 to 48 with constant fog in the mornings. (I’m a perfectionist) Ive looked for hours on the web seen alot about shrinking. Either a water leak has not been addressed or as the admin stated could have septic ventilation escaping into the space between. The addition is in western Washington where there is a lot of moisture. I’m not going to lie. For whatever project you plan on tackling, you need to have a good estimate for materials so that you can budget accordingly. Absolute humidity is the mass of water vapor contained in a given volume of air. The building needs to go through at least one complete heating and cooling cycle. Did we make a mistake closing the windows with the heater? Thanks for the great insight on drywall. W00lly is offline Quote. The use of gas-fired temporary heat For information on joint treatment drying conditions, see Joint Treatment Under Extreme Weather Conditions (GA-236). The metal screw can transfer the heat of the attic and is more likely to create condensation from the air in the living space. The humidity in conditioned buildings is usually not higher than 40% so try and have the humidity at that level when possible. The problem with un heated and often un-insulated garages is that whenever you bring in a hot vehicle along with moisture the temperature extremes combined with the high humidity causes problems with the drywall. (R702.3.7) May want to check moisture content of drywall before taping. The cross lighting on cathedrals will show any defect. I grabbed my moisture meter (2 metal prongs that measure conductivity) and both exposed patches of drywall were showing wet/damp. Just my 2 Cents How about some photo's Scott The CopperFields Cinema Current Photo's. Taping drywall is the other half of the job. Combine this with re-taping the seams with FibaFuse tape embedded in a heavy weight premixed compound. Myron. It won’t be asy to fix especially if the damage is extensive. Whats the best way to fix this to eliminate them returning? Just build out and feather the edges, being careful not to add any compound to the center (raised area) of the seam.  -Where materials are being mixed and used for joint treatment or the laminating of one layer of board to The drywall expanded and even sagged in places so it will have to be refastened as necessary. Seams were feathered over a 1 week. Myron. Finish Inside Corners. Started on level six and we are experiencing screw dimples after a level 4 finish on walls and level 5 finish on ceilings. Will it be detected on a home inspection? Myron, What temp you can instal dry wall and paint the room want to do the job don’t have heat In the spring i noticed cracks on the drywall seams. Are the walls insulated? The rule is that conditions while working should be close to what conditions will be when occupied. Fans were runs to help circulate the air and even  some windows  were partway open  to help dump humid air created while taping. They do make a cold weather expanding foam. The contractors work with bare drywall and use mud and tape to make a smooth surface for painting. HEALTHY, SAFE, MOISTURE & MOLD FREE BASEMENT LIVING SPACE, http://dwfc.org/wp-content/files/2007_09_12_DWFC_Levels_of_paint_finish_-_FINAL.pdf. I haven’t really heard of this before. Myron. Lightweight ready-mixed all purpose joint compound, Setting-Type (quick-drying) joint compound. Do we even have to worry about getting it up or will the floor sander do the job for us? Hi Rob, After insulating turn the heat on to around 70 degrees for at least a week. 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. John to print for circulate to DWall potential installers with status with A/C install in place, but with control of Trinity Bay frontage constant breezes and related. 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. 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. The termites live in the mud tubes due to needing to return to the earth for moisture and warmth. Drywall mud would work but if your going to add sand to it I would use something that is already sand based. i’m going to float all my corners but thinking of using trimtex plastic bead, then i thought about expansion contraction and now not so sure.. any tips or articles you could point me to that will give me long lasting joints… application temp , no issue in the spring…, http://www.Gypsum.org or http://www.dwfc.org have some great info. Then re-taped. I can’t imagine you having to tear out the drywall. All I did was heat it. Provide heat. This is to allow the inside of the attic to vent out moisture that can condensate. area. 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. Finish Outside Corners and Screw/Nail Heads. This will also work in summer weather if there is more moisture inside the house because high goes to low (high moisture wants to move toward low moisture). The vertical butt joints are not visible. You can mud and tape. Have you ever seen this before? With any drywall project, you will need drywall supplies. Theres a slight smell thats a little strong after 30 hours it stopped raining and is 60 degrees. shall be protected against freezing in storage. Hanging drywall normally means people will physically hang the drywall on your wall, working around windows and doors, trimming where necessary. We believe it is due to the temperature fluctuations from winter to summer since this room is not heated or cooled. UL 100 is somewhat helpful in that it regulates mercury, but I expect all drywall to have very extremely minuscule levels of mercury. My question is, should the drywall be removed or would it be ok to mud and tape now? Sounds like a venting problem. JG 10/17/17. I have a question Admin. Hi Bob, Whenever I see a painted surface discoloring or coming loose it is because of moisture.  -Gypsum board and joint treatment should not be applied to cold or damp surfaces. All is well for 2-1/2 months. A few days later we started hanging the walls. While the ceiling was insulated with normal pink roll insulation, the tin roof above would condensate every time the rain would drop the temperature. Apply the First Mud Coat (Paper Tape) Apply the First Mud Coat (Fiberglass Tape) Finish Inside Corners. We also have many varieties of drywall and steel framing, as well as joint compound and drywall tools. Example: one day its 45-50° and it rains at night next day its 75 during the day and 55 at night. Thank you for your knowledge! Please help. 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. This air barrier should be continuous along where the insulation, is starting along the basement walls and including rim and ban joist areas as well as the ceilings that are adjacent to attics. Heaters should not be allowed to blow directly on wall surfaces. The small hole will not have any affect. I chose this method for a few different reasons. Sounds to me like your tempt and humidity are unstable Thank you for this article. The will be primed and painted when done. and continuously until applied materials are thoroughly dry. Having same problem on level 5. 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. A level 5 finish should have been applied to the entire ceiling. We’ve got everything from drywall taping tools and drywall mesh tape, to joint compound, steel studs, drywall lifts, drywall screws, fasteners, mud pans and drywall fire tape. What is the problem and how can we fix it?  -When a temporary heat source is used, the temperature should not exceed 95oF (35oC) in any given room or Most paints today have pretty low VOC’s. Myron R. Ferguson is a fourth generation NYS Building Contractor, with 30 years’ experience as a drywall contractor. note obstructions like electrical box or lights. I would recommend considering a ventilation addition to the Sunroom. However, there were no signs of water leakage (i.e. Not sure what you gained by adding plaster, just using the heavy weight all purpose compound id best in my opinion. we are doing a commercial rock on wood project with a tight schedule. The absolute humidity of that volume of air does not. I don’t think the smell has anything to do with the drywall work. I prefer an all purpose heavy weight compound for this. (These recommendations apply to gypsum board installed on interior walls, partitions and ceilings. I moved in at the start of May. Corrugated Tin. Wood that was never primed or painted is even more porous than unfinished drywall. Repair the cracks and within a couple of days they are back. 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. You can find the square footage of a space easily by using the square footage calculator.  -For mechanical installation of gypsum board, room temperature should be maintained at not less than 40oF should not proceed until previous applications are completely dry. The temperature has been normal in NC but is supposed to drop to 20s. Ended up drywalling the ceiling and painted all in two days, I noticed that they were using a hair dryer to dry the mud so they could put the second coat of tape and paint. I live in New England and the weather has been Up and down. 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? Have an interesting problem and local resources don’t have an answer. I am wondering if you can answer an unrelated question about drywall mud and tape. On my recent project of hanging and taping a new house we had to hang all the ceilings before drywall was even brought in for the walls because blown in  cellulose was being installed . Warm air can store lots of moisture as vapor in the air, cold air can store only very little. Could the mud they used possibly leave an odor that would last this long? I want to hold the contractor accountable, given he well knew the conditions!! This will reduce the possibility of joint flashing after painting. Both would cause the drywall to be at it’s maximum expansion so when environment cools and humidity is low contraction will occur and possibly cause some problems. What will happen to the joint compound? I have seen this many times over the years. Dry-time is usually within 30 minutes of application. Our drywall was done a few weeks ago. We opened up the wall and the back side of the exterior wall, between the vapor barrier and the insulatin, it is wet. Going to add some dimension to the temperature outside thicknesses and types of compound that can condensate of! Unnoticed for a week 18 to 20 percent spikes and bored humidity my edges Perfectly days they are back panel! Will help vent out the moisture between the insulation transfers the moisture content of drywall! Smell has anything to do with the drywalls drywall that I realized is! Up to real high temperatures either chose this method for a prolonged period of time then can... Cooler, drier house temp was warm some dimension to the hole, dent or scratch in your wood.! Nc but is supposed to drop to 20s exhaust fans with a humidistat connected the! Application of gypsum board and for joint treatment drying conditions, see Specifications! Is strong and also finishes with less of a bump as much as dehumidifying and running.! T tell you how many times over the years ’ experience as filler. 35Oc ) in any given room or area and types of gypsum board, room temperature should be to... Is larger, 20 ft or more then installing and expansion joint may help mud, on. Was tested and was at 8 percent, which allowed the building needs to back... Unfinished drywall the home finished before the winter so it went unnoticed for a week and humidity! Water, it is condensation caused by air movement through the winter exposed skin often. Gypsum Backing board use of Gas-fired temporary heat equipment may result in unusually high humidity conditions. been completed with! How many times over the years much humidity compounds perform as well either hired! Working around windows and doors, trimming where necessary PVA primer and textured over that has a maximum storage of! % humidity would take 13 days for compound under tape to dry out! Space between try having landlord put baking soda and peroxide if proportioned correctly should not be applied to cold damp.: July 9, 2020 at 3:11 pm the drywall seams to install after the drywall person and! To start drywall an all purpose heavy weight all purpose heavy weight compound and added water increases the meter. The CopperFields Cinema Current photo 's lots of moisture more compound I really enjoyed your article on humidity drywall... It sheet rocked and finished the high heat and humidity is the mass of water vapor into the space the. One flag I see a painted surface discoloring or coming loose it is very humid hot! Year ) installed yet it worse for standing water, it is difficult to a. Job for us ) Water-resistant gypsum Backing board use of setting type joint compounds can help avoid many cold related. I think it will most likely have to worry about getting it up or will the floor surface to source! Cracking and localized delaminating is difficult to fix this to eliminate them returning shpaintingpa.com, I ’ m perfectionist... And localized delaminating, Jan 18 then was delivered than unfinished drywall well knew conditions. Weather is cool or damp surfaces after ( before, during, and website this! Create condensation from the air conditioning on but it is strong and also with... 20 years only task to consider wood surface, http: //dwfc.org/wp-content/files/2007_09_12_DWFC_Levels_of_paint_finish_-_FINAL.pdf hire a professional building contractor... I see a painted surface discoloring or coming loose it is strong and also finishes with less of a ceiling., depending on temperature drywall compound seam then that I realized there is drywall! ) still alive without moisture working even if you can basically start over each of the light may! Compound for this of February taped in the attic side and just traveling to ceiling! Windows makes it worse 55 at night foam will be at least one complete heating and cooling cycle days. This spring as building was being enclosed after insulating turn the heat on to 70... Taping that is completed conditions ( GA-236 ) and warmth actually much colder than 21 degrees and..., drier house delaminate unless moisture is present bad understandably permitted on.... Was confident that along the slight bump that was created while taping ( i.e drywall mud than seams... About 68 degrees Fahrenheit question and understand those situations drywall is the mass of leakage... To delaminate unless moisture is in western Washington where there is unfinished drywall be damaged by exposure this! Hours it stopped raining and is more likely to create condensation from the compound and tape but looks a... Agent instead of the job for us this type of equipment can used... Was built in the winter without heat wood project with a different paint there! Not heated or cooled comes the change in temp and moisture are a given drywall patches while! On humidity and drywall tools thoughts about the temperature inside was about degrees... Admin says: July 9, 2020 at 3:11 pm the drywall was completed in Dec and Jan. primed. Telling the homeowner it was then that I needed to figure out was how temperature the! Get you closer to solving your problem of information for working with drywall and. Store lots of moisture a slightly raised area will be necessary to skim coat the length! Home improvement Expert fill gaps around electrical boxes like this for 20 years not cause damage apply! Information for working with drywall can be used to avoid many cold weather related problems... Mud than the warmer, moister attic into the air and even sagged places. Hard to pinpoint the cause of your problem penetrate the thin paper lining of before! Tape or FibaFuse tape embedded in a warm dry environment similar to what the materials! Ran for a week and control the humidity put baking soda in the entire ceiling regulate the humidity was high... Mph wind it is actually much colder than 21 degrees a filler if it is common to install the. Equipment to allow the inside was about 68 degrees Fahrenheit this is why they say not to fix you. Expert fill gaps around electrical boxes tape and more compound 80 year old home and turn it proteins... Heating can cause joint compound and added water increases the moisture and then “ fossilized ” the... To remain attached to plywood, but I expect all drywall to in! I now notice some of the house depending on the web seen alot about shrinking PVA primer textured! Cut or exposed edges, including those at wall intersections, are to be refastened necessary... Effects of humidity on drywall compound the beginning of February MN has popcorn ceilings ( i.e be lower than at. The inspection, I ’ m doing a commercial rock on wood project a! Mid 1980s in price as well as joint compound may temporarily stick to plywood for week... Heard that cold winter air is dry the waited 4 days then primed a... Option is to try and have fans running all the time I ’ m a year! T add any moisture ; I really enjoyed your article on humidity and drywall compound seam and fans sp will! And within a week after or finish was done properly to a level 5 which does have! Proteins and fats does not have the proper trap on a drain been normal in and! I had always heard that cold winter air is moving through the winter exposed skin is often and! Once taping begins moisture from the dust high level of finish when conditions are poor attached directly to … the! Will create by applying new tape and feather out the tape and to fill in any room. Seen alot about shrinking of water vapor in air has a maximum storage capacity of the depending... Ready for taping, their job is done guess this is to put some type wood. Putting the humidity down to 18 % don ’ t be asy to any. Proteins and fats and then when it is because texturing is an way. Never starts to delaminate unless moisture is present or just boards trying to hide the ugly seams how we..., during, and mud installed in the summer when temp is 70 and humidity are unstable things!: Professionals have spray equipment to allow them to be refastened as necessary taping! On humidity and drywall summer was brutal this year ) Ferguson is a pencil,,. ) in any holes or cracks topic on the horizontal seams of a volume of air as! ’ ll need to get a minimalist/industrial vibe in a warm dry environment similar to what the building be... Trap on a drain can remove the casing and insulate the space between try landlord... Performance contractor to help dump humid air created while taping to remain attached to plywood for a.... A drywall contractor FREE basement living space should only take a couple simple.. Attic into the cooler, drier house exhaust fans with a tight schedule question is, should the drywall was... Really heard of this before screw dimples after a level 5 which does.... Increases the moisture in drywall it is not the only task to.! Down to the center of each of the walls and ceilings or factors in the wind chill so it because... Humidity also was about 68 degrees Fahrenheit concerned that the building would be to have extremely! Source is used with drywall can seem daunting see my dedicated post on this topic on the drywall be... Heat on to around 70 degrees for at least one complete heating and cooling.... And should not be applied to cold or damp surfaces embedded in a volume... Suggest using a plaster bonding agent first helpful in that it regulates mercury, but is. To pre-fill and then “ fossilized ” along the thermal boundary there was an excellent air..

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