how do I determine the mc standard for this material, is it the same as wood or has its own specifications, 2. A good moisture content is between 6 9% for Colorado. I have built two table tops (douglas fir) that have both suffered major cracking in their final location. the concrete was completely dry, no standing water. Building pathology: moisture conditions within traditionally - NBS A Guide to Subfloors Used Under Wood Flooring The levels were between 20 and 23%. The SG setting is on the card that comes with the meter. Prior to the flooring installation, make sure your subfloor has not experienced leaks or other water damage. Am I possibly getting false positives? to keep the moisture content below 20 percent. The home inspectors working for fees today seem to have one primary motive in mind: to cover their liabilities. The moisture content of wooden substructure members is routinely being disclosed in the closing process of real estate transactions. Learn how your comment data is processed. With the WoodH2O-app I could deduct the EMC for The Netherlands would be between 15 and 16. Why and how can I say this? How Timber Reacts To Moisture. Just press the scanning plate against the woods surface, turn on the meter, and receive the reading. They said if i wanted to spend the money, a humidifier would help keep the humidity inside the house more consistent throughout the year. somewhere. Your table may have been a little too high in moisture, hence the crack as it dried slightly in the drier environment. You can check for moisture by using a moisture meter. Foundation Underpinning Repair: Unnecessary? Damn those shop classes I didnt take. with the spring thaw, i was one of the lucky ones that got water in my basement. Your email address will not be published. Phil, what are you making with the cedar, and in what type of environment will it be? It is best to allow the wood to equilibrate to the room environment. We havent gone any further since the condition was found so close to us purchasing the home. Above 90% RH or 20% WMC, mold can grow on the wood. If decay or WMC readings over 28% are present, find and fix the sources of liquid water quickly. Writing all the way from Australia, Steven. Checking the Moisture of your Subfloor - Ambience Hardwood Flooring 16% 20% Readings in this range indicate a possible elevated level of wood moisture. Larry: I recently had my annual termite inspection. 0 WM=8DBaHh10tIKR/OH}X5Kpt'_]4Mfg9@w8~ n$R At that point in time, we did not have a conditioned house. The ideal moisture content for hardwoods is between 6% and about 9%, depending on the ambient conditions around the wood. I installed a sump pump and 6 mil vapor barrier, but the barrier is not sealed around piers and the ground is moist under the barrier all year. The more specific way to know would be to measure the relative humidity and temperature in your homes air and then plug the numbers into a calculator like this https://www.spikevm.com/calculators/logging/equilibrium.php This will tell you what the MC% should be based on your specific environment. PDF Specification for Solid Timber Flooring Installation, Sanding - ATFA But when you touch the pins to the embedded screws, you get between 14 and 24 % in various areas of the board. After reading your article and following comments, my question is : How much does the finish of a wood project for indoor use affect the moisture content? Percent moisture content in wood is the ratio of the weight of water compared to the overall weight of a piece of wood. Its more important to understand that the wood is kiln-dried down to a certain bell-shaped range of MCs. (As a percentage) Basically the chimney breast (in bedroom and downstairs room) has been measured with a digital moisture meter and states 'OL' on the display, the surrounding walls measure between 0.4% and 1.2%. Please commenr? Observed water leaking along seams of several sheets of original plywood in attic. The crawl space must be a minimum of 18" to the bottom of the floor joists, and the soil in the crawl space covered with a heavy duty plastic moisture barrier, and sealed at the seams. I think that I know my own answer, but thought I might reach out for some possible better insight. The electrical current will then move from pin to pin and measure the resistance encountered. Now the fungus goes dormant. Though on occasion, they are made of 2x10s and tripled for additional . In other words, the water weighs more than the wood fibers. Waterproof membrane . Turn on the meter. Floor Joist Span TablesCalculator Wagner has a free app called WoodH2O to help you determine the proper moisture levels based on consistent humidity and temperature. Yes, hardwoods such as cherry and walnut should be between 6 and 8% moisture content. 7. To make sure the wood is properly dried, he always uses a moisture meter before working with it. Replaced the subfloor, which is . The fastest way to test the moisture content of wood is to use a moisture meter. Thank you. for a mere $4900. Knowing were all the piers are, I can stand on top and feel a small hump in the floors. Currently reading a 12.5%. For example, if the expected EMC ranges from a low of 6% to a high of 9%, the baseline moisture content of the wood would be 7.5%. This is more likely to occur to occur in lower-grade boards, where knots and uneven grains are already present. With a Wagner L606, I am getting MC readings 12%->15.5% . This will stop the wet/dry cycle that exists every year, in every ventilated crawl space containing A/C ductwork in the SE United States, over their lifetime. WagnerMeters 1.93K subscribers 3.2K views 1 year ago Hardwood Flooring - Tips & Problems Do you work with wood? I live in upstate South Carolina. I had a quick looked around the crawl space and didnt notice any structure damage. The thickness of flooring joists themselves will be determined by what's going on top of them. If the moisture is less than 20% and the floor joists are structurally sound, like the joists at this home, there is no need to worry about any fungal staining that might exist. Treatment levels for timber and timber-based materials used under tiles in wet areas where the waterproofing membrane cannot easily be inspected or maintained should be: H1.2 for timber floor joists and wall framing around showers; H3 (CCA treated) for plywood. What Are Safe Moisture Levels for Hardwood Floors? - Delmhorst The manufacturer of the oil-based poly should have a specification on the maximum allowable moisture content of the wood. The other thing to consider is examining how water is entering your crawl space. Keep air conditioning drip pans clean and the drain lines unobstructed and flowing properly. I gladly obliged. 17 and the flooring is at 6 to 7. https://www.wagnermeters.com/wood-moisture-meters/. One type of wood moisture meter. The boards have dried nicely so far with minimal warpage or checking. Moisture In Basement - Plumbertip Hi, we live in a coastal area, had a recent water leak, and a hard wood floor MC is measuring about 25% the water did not contact this area directly. I may have missed this already but I have a few quick questions. As the humidity decreases, the MC decreases, causing the wood to shrink. Your help for resolving this issue would be highly appreciated . There is only so much moisture a piece of wood can give up, over time, before a failure occurs. In all cases, determining the acceptable moisture level of wood requires the use of an extremely accurate moisture meter. Here is a link to our website for more information: https://www.wagnermeters.com/shop/orion-950-smart/. I wanted to know if is there any standard which specifies the acceptable range of moisture content for wood used in packaging industry like pine wood. These are slabs roughly 2 thick. The different types of wet area floor construction - Level When you do this, you not only ensure that the entire batch is okay on average, but youre also far likelier to catch boards that are statistical outliers and could cause problems. Free Webinar The What, Why, and How of Wood Moisture Testing. It does the same for wood, and is especially hard on softwoods, such as pine or fir. Thanks! Just across the threshold to a white oak floor installed in ~1914 and the MC is 15%->16%. Signs Of Moisture In Basement. i dont understand how the bottom beam looks like swiss cheese from all the holes ive drilled and has had a commercial blower on it for days yet the number is still high despite there being no visible water to keep the wood wet. Thanks for the reply. You will also see that the healthy wood moisture levels of 10% - 16% occur when the relative humidity is between 55% and 80% at 70 degrees. I dialed the 800 number for Wagner meters and all I got was two sales pitches for a Life alert type device. It is not uncommon for wood to expand or contract as much as a 1/8 per foot of width, so maintaining a stable environment is important. I found your website at just the right time. It will continue to absorb and release moisture until it comes into balance with the surrounding air. That is still quite a wide range. Ideally Ill wait until reaching final drying but sometimes I need to use wood before that point. I think mine is +-3% Is it possible being near the door just means greater humidity and there isnt actually a leak? Lay the panels perpendicular to floor joists, allowing 1/4 inch of space between panels and the wall. This pin-type moisture meter is one of Delmhorst's most popular models. Please give us a call at (800) 634-9961 or email info@wagnermeters.com, if youd prefer. Your reading of 12.5% tells me it is workable. First time this has happened (splitting that is). Any input would be most appreciated. Moisture contents in wood floor joists in houses with moisture problems are exceeding the 20% maximum level for air dried lumber. P.O. If low WMC readings were obtained during the winter, and other signs of high moisture levels are present, obtain additional readings during the summer. You mentioned the humidity outside is 55%. I am having a section of our 3.25 Maple hardwood floor replaced. Hug the ones you love when you see them! hj0Ed=h].J-)_q},jR3$\ eH"wCk)E)J8 In your blog I read that furniture for outdoor is dried to a MC between 9 and 14%. So, when looking at the relative humidity of the space, spaces left above 70% RH for extended periods will also promote mold growth. Would you be able to say anything about the optimal MC range for this specific situation? It seems to me the supplier is drying the Teak to 14% because that is what is needed in Indonesia. Should it be less? Also, please feel free to provide us with the number that you called so we can make sure that all of our phone numbers are printed/posted accurately! I suspect the screws may be skewing the measurements. Wood in buildings usually has a wood moisture content of 5% to 15%. Good luck. During the increased average temperatures of spring and summer, timber moisture content reduces to more acceptable levels. Second, would the same pine slab, would it be okay to use for a side table or Kitchen island. Pros and cons of wet area floor finishes - Level I would like to load eucalyptus and pine wood logs to India . We had boards that were also cracking/splitting and other places where small pinholes were showing up. For a wooden subfloor you will need to use a 2-pronged moisture meter. If you want, just give me a call at 800-634-9961, ext 225. Thanks Mark, The EMC outside and the wood should be the same. 10? Here is a link to our moisture meters, thermo-hygrometer, and Smart Logger. Because pinless meters scan the woods surface and cover a larger area than pin-type meters, they provide a more thorough picture of the woods moisture content. What Are Acceptable Moisture Levels in Wood? - Wagner Meters We are manufacturer of eng wood flooring. If a wooden sample has moisture content range of 2-6% only and if it has moisture content of 9 or 10% then what does this mean?? So please help us to know what should be required moisture level in Acacia board in final product if we need to restrict wood movement at Colorado . In contrast, Las Vegas in the drier Southwest has much lower EMC percentages than most other U.S. cities. However, the ideal humidity range in some climates may be higher or lower. my question is, is there a possibility that the wood will shrink because of the weather condition?the wood that we used for the door frames and bidding is beechwood. Which do you recommend? Set the meter to the species that makes up the bulk, in this case, the plywood. Characteristic of this wood easy to absorb of water and have large open pore. A11 - Substrate Testing - Floor Covering Reference Manual The house was not in the flood area however they did receive 20 inches of rain. Summers are hot and dry while winters can be cool. Too wet and you get fuzzing. Doesnt sound like this has been a problem in the past. I had a water leak under my crawl space which has 3 inches of foam insulation applied to the underside of the sub floor. . A study by Imamura and Kiguchi (1999) showed that wood moisture content in excess of 20% can cause a 5% loss of nail shank diameter in four years and a projected 25% loss in 30 years. How to use a moisture meter properly - BT Preservation | Damp Standards and tolerances guide | Queensland Building and Construction or finally the product will be placed where. You can now understand the meaning of moisture content 5.5%, 15 g/m2/24 hours, and relative humidity 75% with these facts. For severely rotten joists though, you're going to want to remove the rotten section. A general rule of thumb for the coastal regions of FL would be 11-13%MC. Wood Moisture Content - RLC Engineering, LLC Thank you. My thought is maybe to get one of your meter for greater accuracy? I called them back out in August of 2019 because after installing a humidifier and in the prime of humid season, the floors were showing no signs of improvement. You can use a dehumidifier when you need your crawl space drier, but it's essential to maintain proper moisture levels as much as possible. Wood moisture content is always varying. If youre wondering how wood can have a 200% moisture content, heres how that works. The MC varies from 7% 13.5% around the exterior door on dry days and 10%-16% during rains. 25-30 - Actual, and often extensive, damage is evident when readings reach this level. There will be statistical outliers on both the low and the high end and youll want to catch these by using a quality moisture meter.

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