What is the acceptable moisture level for plywood? - Answers I would like to rip two slabs and glue them together to make a nice large dining room table. info@rlcengineering.com However, it We had boards that were also cracking/splitting and other places where small pinholes were showing up. Moisture Content of Wood | Everything You Need to Know - Reliance Timber 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. Many timber-framed floor problems can be traced to moisture levels, excessive loads or borer. I may have missed this already but I have a few quick questions. The difference between the wood subfloor and the hardwood flooring shouldn't exceed 4% for solid strip hardwood . Standard construction studs such as 24 and 26s are typically dried to 19% moisture content before they are installed. i also drilled into the wood every few inches, several inches deep with a typical drill bit. We dont know if we still should be having a commercial drying process? Let's repeat that again. Pinless meters also dont leave damaging pinholes on the woods surface. I would think it would vary depending on the contents. Such readings should alert the homeowner to look for a source of excess moisture. I live in Charlotte, NC. Floor Joist Sizes & Span in Residential Home Building (Complete Guide) After my inspection I wrote the following report: As per your request, I visited the subject residence today to evaluate mold or fungus growth on the floor joists. 11 0 obj << /Linearized 1 /O 15 /H [ 1017 209 ] /L 26721 /E 14333 /N 2 /T 26383 >> endobj xref 11 18 0000000016 00000 n 0000000724 00000 n 0000000820 00000 n 0000000963 00000 n 0000001226 00000 n 0000001393 00000 n 0000001566 00000 n 0000001771 00000 n 0000002827 00000 n 0000002934 00000 n 0000004271 00000 n 0000005322 00000 n 0000005517 00000 n 0000007871 00000 n 0000007949 00000 n 0000009756 00000 n 0000001017 00000 n 0000001206 00000 n trailer << /Size 29 /Info 10 0 R /Encrypt 13 0 R /Root 12 0 R /Prev 26373 /ID[<2277e06d91c56aa37caf41071ab29f47><2277e06d91c56aa37caf41071ab29f47>] >> startxref 0 %%EOF 12 0 obj << /Type /Catalog /Pages 9 0 R /PageMode /UseThumbs /OpenAction 14 0 R >> endobj 13 0 obj << /Filter /Standard /V 1 /R 2 /O (D+K\r,s\n?$+%{Nhjp-!) Its mc is 11- 12% . : Mold & Fungus In the Crawlspace. So we are seeking redress, but there are jacks present underneath the home which the home inspector didnt report either and didnt know if this was extra support for the water heater or what. During the increased average temperatures of spring and summer, timber moisture content reduces to more acceptable levels. These are typical readings for exterior wood. Colorado is cold and dry. Ideally, you want to check the EMC in the area you will be working on your slab, along with the area it will live in. Will the reading be accurate? Im down to ~13-19% MC near floor level, based on a cheapo moisture meters readings. As the humidity decreases, the MC decreases, causing the wood to shrink. Just press the scanning plate against the woods surface, turn on the meter, and receive the reading. I had several of the varnished decorative hardwood laminated ply panels replaced in the lounge on an air conditioned luxury yacht. Since your subfloor may be concrete or wood, you should make sure you choose a meter that is specially designed for the specific element you are testing. The inspector said his meter reading taken from my basement on subflooring/joists/framing was too high. I dont know what type of floor you have, but if it gets wet enough, about 25% moisture content or higher, mold can grow. It is not fair to ask the seller of this home to pay some pest control firm to spray Borate on the floor system. Hope this helps. This means that wood intended for interior use in this location should not only be dried to around 6% but should be kept at this moisture content both before and during the manufacturing process. A subfloor needs to be clean, dry, level and structurally sound. 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? The next sheet is 21.5% adjacent to 2X4. Please provide us with regular updates. The average annual relative humidity will play the biggest role in determining what the optimal MC should be. i want to make a headboard from it. Two questions I need a reliable, easy to use meter that can cover all species as I now have a portable mill and that can be used for treated. Call JADE today for a crawlspace inspection and we can give you definitive answers to your crawl space problems! The shipping time is approximately 45 day in a 40 container to the west coast . We will be building fir windows. To do so: Make two vertical cuts through the joist a safe distance away from each end of the rotten section. i used my dremel with a shaping bit about 1/8 in to cut vertical slits or vents about an inch deep and a couple of inches tall into the bottom 24 and have kept a commercial floor blower on the wood several hours a day for more than a week yet, the number is not going down. What is an FHA Permanent Foundation for Manufactured Homes? Condensation on the inside of a windowpane. If this is confusing, dont worry. hellow! Substrates must be protected by: Am I possibly getting false positives? Thank you for your very informative knowledge about all of the items on this page. Water was coming out of this outlet and onto the floor? can be insulated and heated (insulation is mandatory if heated) require careful planning and . Drying equipment removed 3 days ago. Other signs of high moisture readings include surface mold, evidence of water flows in the crawl space, evidence of water stains or evaporation from foundation walls and columns, evidence of condensation on ducts and evidence of water drops impacting the soil under ducts. Because ventilated crawl spaces throughout the Southeast United States allow high humidity and fungus spores to enter the enclosed space beneath the home. Your contractor may use something called a moisture meter to see what the approach should be for joist damage, or it may be more obvious based on the appearance of the wood. A Brick Veneer Crack Tragedy: A True Story, Spraying for Mold on Floor Joists: Pest Control. Replaced the subfloor, which is . I have one question with regards to pinless moisture meters and wallboard/Sheetrock. Notice that the EMC of the in-use location is the same as the MC: So, using this chart, we know that in an area of the country where the RH inside a home or office is anywhere from 26-32%, both the EMC of the in-use location and the wood moisture content kept in that location will be 6%. I have a question, I have moisture in the crawl space, we insulated the crawl with closed cell, cannot get the osb subfloor below. Currently the RH is 76%, the residence RH will be set at around 35%. Moisture was around 25% when milled, and the ends were sealed. The containers that we have received so far have arrived wet and mouldy. I am presently drying it to around 8%-10% and then rotary polishing it, but I am facing the issue of burrs on the edges. We have started to import teak outdoor furniture from Indonesia into Europe. The thinner veneers wont have much bearing on the reading. 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 . If the MC of plywood is above 20%, can it be redried in a kiln or would that harm the glue? The substructure may show decayed areas, ranging from small to very large, of rotten floor joist, sills, and . Does that seem normal. Is it possible to get a 99.9% moisture reading (using a Cassain GM-200 hydrometer) on a particle board floor which looks and feels completely dry? PDF Residential Housing: Wood Moisture Content - Cisllc.org Live in Tn. A wood moisture content of 47% is too high. Question for the expert: i recently replaced a toilet that had a leaky wax ring. Thank you for the well described article. Thanks in advance for your input! The excess moisture source should be corrected immediately, and monitored until the WMC returns to the 12-16 range. Too wet and you get fuzzing. Its still there and causing stains and scaring inexperienced home inspectors who frighten buyers, but its dormant. The definitions section of the IICRC S500 current edition describes dry-standard: "a reasonable approximation of the moisture content or level of a material prior to a water intrusion," drying goal: the target moisture content or moisture level in a material to be achieved at the end of the drying process established by the restorer. You mentioned the humidity outside is 55%. The levels were between 20 and 23%. As with the hardwood flooring, it is essential to check the OSB's moisture content using a moisture meter. It will continue to absorb and release moisture until it comes into balance with the surrounding air. 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. 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. Lacquer will not make a reading difference as long as there are no metallic components in the lacquer itself. Moisture content of 11.5% for the oak is a little high for furniture grade hardwoods. If the leaks have damaged the sub floor or joists, call a licensed general contractor for repair. However, the wood species and the thickness or size of the wood may also factor in. I suspect the screws may be skewing the measurements. As the humidity increases, the MC increases, causing the wood to expand. This week, I notice the next pier on the same beam is starting to push up, warping the floor. In their warehouse, and perhaps partly also in the container.
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