hardwood floor cupping dehumidifier

Good luck. Hardwood floors buckle when the humidity levels in the lower levels of the house are too high in the crawlspace or basement,” explains the Basement Health Association in the article Negative Effects on Hardwood Floors. In some instances, the use of fans and/or dehumidifiers … Right now in Houston the weather has been cool and dry. Serv Pro was in our home for 5 days with 6 fans and dehumidifier. In many cases, if cupping isn’t severe, the issue can be fixed once the moisture issue is fixed. For many species and aspect ratios, a piece of flooring placed on a towel that is kept moist will show some cupping in a day or two. The amount of cupping will depend on the species (swelling coefficient), cut, width, thickness and the restraining forces that may be present. Too much moisture or water accumulation can lead to hardwood warping, buckling, cupping, and crowning. Restoration company got to work immediately removing water, set up fans, dehumidifiers. Many moisture issues can be fixed through household climate control, taking moisture readings throughout the house, or seeking out undetected leaks or spots where moisture could creep in from other areas. When the water that causes cupping comes from plumbing, appliance or building leaks, or from site grading problems, it is often straightforward to diagnose the problem. The floor is going back down but isn’t 100% flat yet. If it doesn’t return to an acceptable level, depending on the type of product you may be able to resand and finish the section. Excess moisture is the culprit when it comes to hardwood cupping. Gap and cracks between hardwood planks. Solid and engineered wood flooring can both cup. Now that a year has passed and no settling has taken place to resolve this situation are there any options short of completely replacing the floors that you could suggest. To go back to normal? This is why the bottom of the board swells and makes the edges curve upward into an almost wave-like pattern. Due to the taper of the side match from wider at the top to narrower at the bottom of the flooring, the boards experience more force across the face than across the bottom, and they become concave on the surface. We built our home over 30 years ago. You can either get one and take static readings in these space’s during the seasonal changes with something like this https://www.wagnermeters.com/shop/th-200-thermo-hygrometer/ or you can place something like this https://www.wagnermeters.com/shop/smart-logger/ in each space and it will log data, over time, so you can download and compare the information between seasons. The peaks are 1/8″ or under in certain areas. Apparently there was inadequate ventilation and one section of the insulation was completely wet. The Effect of Humidity and Moisture on Wood Floors. In warm climates, air intrusion below a conditioned space, moist crawl spaces or inappropriately sized air conditioners can all cause moisture problems. Usually problems with buckling or cupping in a wood floor are caused by excessive humidity inside or under your house. The cupping is due to some type of moisture imbalance in the wood flooring itself. Place it in the center of the room and leave it on for at least 24 hours. We understand your frustration. High levels of humidity can cause hardwood flooring to expand significantly, sometimes causing the affected boards to lose their structural integrity and crack. It can be a nightmare for a proud and happy homeowner. All drywall in garage was soaking wet and was removed almost immediately. Thank you! • Inadequate or inoperable HVAC systems resulting in elevated humidity levels. Water, as with just about any household issue, is almost always the cause of hardwood floor warping. https://1drv.ms/u/s!Ag-aQU8wF_D_gzF8Ivj26frARZsr?e=crx01Y pls suggest Ways to Prevent Hardwood Floor Warping. Classy Walnut Stairs Spiral in Bulgarian Penthouse. This expansion can be in the form of cupping (the center of the board is lower than the edges) or crowning (the center of the board is higher than the edges). The reason the floors are cupping is that the cellulose in the wood is absorbing moisture and expanding. • Engineered flooring that has experienced an increase in moisture, where the core material running perpendicular to the face of the board swells at a different rate and in a different direction than the adjoining layers, forcing the ends of the material to lift, which can then telegraph to the surface of the plank. Many homeowners spend thousands of dollars on new wood floors that might end up ruined because they don’t have a whole-home humidifier – which costs a fraction of the price of their floors. Hardwood Floor Buckling and Cupping in Summer – What to do. As wood responds to environmental changes, the boards in a floor can experience forces from adjacent boards and from the subfloor. The general effect is easy to demonstrate by … The humidity levels in your home are extremely important for maintaining your wood floors because moisture loss causes wood to shrink and moisture absorption causes wood to swell. The vapor-driven process is slower than when liquid water is present. We have checked the humidity levels in the sub floor (higher than above ground – maybe a difference of 7 degrees) .. and we see NO indication of water or moisture below the flooring (checked below and saw nothing). Here's a rundown on why cupping happens. During the first week of December 2019, we installed new Cumaru wood flooring throughout the house.Our house is divided on 2 levels, divided by a mini staircase. Absolute Coatings GroupAbsco Quick Dry Penetrating Wood ... Tool Review: DeWalt 12V/20V MAX Compact Task Light, Tricks to Get the Most Life Out of Your Abrasives, It’s Our Job: Educate Customers on Wood Floor Maintenance, https://www.nortonabrasives.com/en-us/markets/floor-sanding?utm_source=Wood%20Floor%20Business. Now, whether closing the vents was good, I have my doubts. The crawl space is vented and dry. So your flooring may show signs of staining from small spills.The wet floor … To avoid these mistakes, there is a way to test for a change in your home’s ambient conditions over time. You can speed up the process by using an electric fan, then leave your dehumidifier on for about 24hrs. Unlike solid wood, some engineered flooring cups when the MC is lowered. No moisture. That was removed and we just had a dehumidifier installed under the house. Same with insulation in garage. Then he said even if it doesn’t settle down it can be easily repaired simply by sanding and refinishing floor and it looked like floor needed refinishing anyway. I see it has grown UP (LOL) but any thoughts on why it has done so? Everywhere else is fine, underneath my bed looks normal, and even the floor right in front of the bathroom is perfectly fine, it’s just the area where I had the protector pad and area and it’s only three raised sections. It can still react with the moisture content (MC) in the air around it. 2) Can 1/4 inch expansion gap have a compounding effect on cupping? The reason the floors are cupping is that the cellulose in the wood is absorbing moisture and expanding. Hardwood floor in basement cupping Q: My basement was finished by the previous owners about 30 years ago, and they put down hardwood floors, possibly directly on the concrete. Everything seemed fine until Christmas (3 weeks later) when we noticed that the floor was cupping in the section where the plywood had been installed, but not in the rest of the house where the flooring was installed on the already existing plywood. It’s hard to tell what is happening with your laminate floor without gathering more information. The floor have starting cupping and pulled away from the slab. In short, moisture. Please help us. Can hardwood floor cupping be reversed? Hardwood Floors Replaced - Cupping has returned!?!? Dishwasher leaked – My fault but after watching fir leaks when doing final install of dw in place I loosened the supply hose The slow drip wasn’t discovered until floor boards were cupping. Restoration company also removed baseboards, drilled holes in walls to blow hot air into space behind dry wall. The joists are not insulated. Cupping can also happen when spilled water gets absorbed by your hardwood floors. Good luck. Dew point levels increase. The result is gapping between boards when the floor is dried because the boards are narrower. Our cottage flooring as all pine (rather wide boards). Consider installing a dehumidifier … It can happen to most types of wood, and it’s often the first observable sign your floor is being affected by moisture. It’s very important to make sure no repairs are done until the EMC (Equilibrium Moisture Content) has stabilized. Remove everything from the room. It’s my contention that maybe the wood hadn’t acclimated to the environment before it was installed. Worst case you will need to do a replacement in that section. Removal of drywall from garage ceiling allowed drying of living area subfloor from below. It doesn’t sound like its that bad indicating to me it should be flat within 6 months. Depending on how much moisture, and how long the hardwood floor is exposed to it, it can do irreparable damage. Insurance came to the house the following day but waited 4 more days to decide to dry the floors out. Thanks so much. 2) What was the moisture content of the wood prior to install to installation? They have risen right up off the subfloor and look as though they are about to pop any second! Water covered floor, was flowing out balcony of living area and flooded lower level garage. Most of the time if the crawlspace humidity is an issue and there is enough ventilation, closing off some vents and utilizing some type of power vents to increase circulation and pull humid air out of the space is desired. Cupping is one of the unfortunately common issues that can plague hardwood floors. When increasing MC causes a board to expand, the rest of the floor pushes back and restricts the swelling to some extent. Understanding what makes a floor cup—whether solid or engineered—can help prevent wood floor failures, or, once the cupping has happened, can assist in diagnosing the source of the problem. mostly. what should we do? Wagner Meters’ Orion® moisture meter line, https://1drv.ms/u/s!Ag-aQU8wF_D_gzF8Ivj26frARZsr?e=crx01Y, https://www.woodfloors.org/find-a-professional.aspx, https://www.wagnermeters.com/shop/th-200-thermo-hygrometer/, https://www.wagnermeters.com/shop/smart-logger/, Hardwood Floor Problems: Heed the Warning Signs, Wood Floor Cupping & Other Common Problems: Spotting the Trouble. A: It is possible the cupping will go away on it’s own. However, several common situations that are known to cause cupping can be addressed, and can even be reversed. They sit on a subfloor with a crawl space underneath. If you imagine a picture of a child drawing a boat in the water, then the water will give you a good idea of what a cupped floor looks like. We have tried dehumidifier under the house in the spring. This is likely to be the case when a wood floor has finish on it. Am I looking at weeks? You have to worry about more than water damage as you care for your floors, making it essential to keep an eye out for signs of the most common problems that plague wooden floors, like cupping, buckling and peaking planks. Thanks for reaching out. It may be best to contact NWFA.org to get an independent inspector to review your floor and determine the cause. My question is what can we do to prevent this from happening again. It is not hard to see the effect in wood flooring, either. In many cases of slight to moderate cupping, eliminating the source of the water and drying out the flooring can save the floor. He will determine the cause of the peaking and provide a written, detailed report for you to follow up with. Thanks so much for any advice you can give us. C. Upon delivery of the flooring to the jobsite, recheck and record the MC of the subfloor. Some of the causes of installation related cupping are: Underlayment and/or subfloor that is too wet at the time of installation will cause wood floor cupping. Also, make sure that there is black plastic covering the crawl space. During the winter the cupping went down 100% and I have tracked humidity in the crawl space through out the year....it remains 45% or lower year round now. Can We Be Proactive in Preventing RH Problems for Wood Floors? Things looked dry except for a small puddle of water near the hot water heater. You might be able to figure out how to remedy the situation yourself if you find it’s due to humidity in the air or a leak or spill. This moisture imbalance could be from the bottom or it can be drying out from the top. The builder has said that there is absolutely no moisture in the crawl space that would have caused the cupping. We live in a condo and was wondering what the best way to resolve the cupping would be? We had 3" white oak hardwood floors installed on the entire 1st floor of the house along with the upstairs master bedroom. I just noticed a small area where about three floor boards are also crowning. Other causes of hardwood floor cupping could include situations such as basement plumbing leaks that allow moisture to migrate up into the subfloor and into the wood flooring or the heat from a wood stove that drys out the air in the environment. This piece of engineered flooring was at a normal moisture content (10%) and was kept at a temperature of 140 degrees F for several days. Sorry for the issues with your floor. How long does this take? In extreme situations where there isn’t room left for flooring expansion and moisture conditions increase in a floor, the entire floor can grow so much it can actually move walls. Set up a dehumidifier to try move air and dry out crawlspace. Knowing what the concrete, plywood, and finished wood floor moisture content/condition where, prior to installation, would give a solid baseline for where the floor components started and should have all been measured prior to installation. The cupping could continue to worsen and create gaps between the boards. Help! 2) As the water penetrates the wood, the wetter material on the back expands, but the dry face does not, so the board deforms. Thought comments appreciated greatly. The temperature and humidity must be within the manufacturer’s requirements. (Refer to the MC chart in Part I of this chapter.) We are running 6 fans in the area that was soaked as well as a dehumidifier brought in by Serv Pro. This is similar to the way that a bimetallic thermometer changes shape by bending when the temperature changes. We live where we have ledges all around us. We immediately observed together: "That floor was cupped!" Both situations, although different, are both due to a moisture imbalance in the boards caused by either the addition of moisture or the extraction of moisture from the floor. Thanks! (hardwood floors, dehumidifier, foundation, window) User Name: Remember Me: Password : Please ... dehumidifier, etc.). (For more on that problem, see the April/May 2011 article "How To Prevent Cupping and Worse in Summer Months."). Help! I hope this information is helpful, best of luck! We had new white oak hardwood floors installed in our brand new ranch one year ago over our crawl space. Although all engineered flooring is not designed in the same way, a common construction involves the face of the desired species applied to a backer. Hardwood Floor Cupping Problems? There are several reasons this happens: • Flooring incompatible with the environment in which it is installed. The paper will curl up away from the water. Keep in mind, the issue may not necessarily be in this area, this may just be the weakest link in the floor and where the issue manifested. We live in Florida in the winter. It is 2-1/2″ width x 3/4″ thick. “Buckling is when the hardwood floor lifts or separates from the sub floor. It will then take some time for the wood flooring to get back to its normal internal humidity balance and shape. Hardwood floors are a classic design choice with several practical benefits, ... Once the cupping process is underway, which is when the sides of the floorboards swell and rise higher than the center, there’s only one thing left to do: rip out the flood-damaged floor and replace it. As noted previously, moisture movement within wood can be slow. One instance that involved a delayed manifestation of a cupping problem was a wood floor installed on the second of three levels in an existing structure in a warm, humid climate. If a board is bent a small amount, it will go back to the original shape when the bending force is removed. This week I noticed cupping in only a retangular area about 5ft by 15 ft. I hired a restoration company that were onsite by afternoon of June 2. or may be the concrete floor was not cured properly? My hardwood floors are newly installed in the upstairs throughout. When they left today…. We had carpet and linoleum throughout until 2 years ago. Hardwood floor moisture problems: – Cupping: When a wood plank cups, its edges become higher than its centre. Weather … Our time-honored solution has been to ventilate these spaces to help control moisture levels. Place the fans at the highest settings possible. Cupping, also known as wash-boarding, is the milder form of floor damage. My floors are stained with Jacobean stain. Contents. The installer said it was moisture under the slab and eventually every plank would start to cup. The floor has lifted and everyday the lifting is a little larger. Typically during spring and summer, you have more humidity causing all wood to absorb moisture. The boards have bowed up in a large section in the center of the floor, and you can bounce on them. Hello Mr Spangler, I have a newly installed engineered oak wood floor throughout the first floor of our new construction home. Could it be that the contractor didn’t have the wood acclimate to the space? This is the opposite of cupping, where the center of the board rises, creating an inverted U shape. In order to get an unbiased opinion of the floor, it may be best to look for a certified wood flooring inspector in your area at http://www.nwfa.org. As noted previously, moisture movement within wood can be slow. E. When the wood flooring is to the expected in-use (e.g., normal living) and manufacturer’s required ambient conditions within the facility, and this coincides with the subfloor moisture conditions, and these conditions are being maintained, the flooring may be installed immediately. Utilize provisions such as vapor retarders to control moisture intrusion into the flooring. Prolonged moisture issues can lead to many types of flooring failures, so it pays to be safe. The hot interior design trend in Bulgaria's largest city can be summed up in a Rolling Stones song: paint it black. Hardwood Floor Cupping and Crowning. Now that we know the moisture is originating in the crawl space, we can begin to assess what measures are required to ensure the floors stop cupping, and being certain it does not happen again. Maybe the floor seems “wavy” or even rippled. What do you think? thanks so much! Homeowners take pride in their wood floors. (To find out more about the cellular structure of wood, see my article "Understand the Science of Water and Wood Floors."). I have lived here with no problems with me oak floors for 4 years but did have some fungus. This imbalance could either be moisture from the concrete, environmental conditions in the space being to “dry” and drying out the top of the wood, and/or a wood floor … ____ Add fans in this room as well (and if there are windows in this room, open them as well if it’s not raining). Chances are that some of the water leaked into the sub-floor beneath the hardwood flooring, and you want to dry this out as well. It’s very likely they will not return to normal. It looked perfect for about a month then it started to cup. Cheers, Anne. B. Thank you. We sprayed the entire crawl space with the foam insulation before we installed the floors. This process can be sped up by circulating air over the floor using a dehumidifier, fans, and other tools. A hard hit will cause a dent. Engineered flooring will perform best in the MC range near the value it had at the time of manufacture. Cupping can happen even to a flawlessly-installed wood floor, depending on the conditions of the building and the environment. Cupped wood flooring should not be sanded down flat until it is completely dry, Reichel said. It’s no revelation that standard hardwood floors are challenging to maintain. We'll discuss each construction separately, as the dynamics are different. I live in Los Angeles where we don’t get adverse humidity. How to Fix the Floor. I looked under the house. What can be done?! Acclimation is when the flooring had reached the conditional moisture context where it will be installed. 3. It’s possible that it wasn’t acclimated properly. Sanding So, now that you have eliminated the moisture source and dehumidified your space, if you still see no change in your floor, the cupping … If the MC of this flooring is decreased, the face material attempts to shrink approximately 10 times faster than the plywood backer. Depending on the severity of what you describe, yes, the boards may be able to be salvaged. Moisture readings were collected throughout the living area and were 99% everywhere. This happens when the humidity level is high, when the boards absorb too much moisture from the subfloor, from water leaks and spills or even by cleaning your hardwood flooring … Water vapor emission from concrete or a wet subfloor can cause a cupping problem in any climate. The ends of the planks are lifting-edge lift? And, below, here's a cupped engineered board. Solid wood floors and engineered boards can both suffer from cupping, although moisture has a different effect on each type of flooring. The edges are higher than the center making the board look like a cup, creating an unsightly tripping hazard. Upon delivery of the flooring to the jobsite, recheck and record the temperature and relative humidity in the space receiving the wood floor. It is important that wood floor installers consistently produce floors of good quality, but, as you can see all the time, cupping continues to be a persistent problem in our industry, and for all types of products. Thanks for the questions and sorry for the problems. It is not existing in the old hardwood that was already there downstairs. Here's a quick glimpse at how cupping progresses: 1) At the beginning of the process, water is introduced to the bottom of a dry board. Severe cupping should be addressed by a professional so that the edges can get sanded down, but often minor cupping will resolve itself as moisture in the air dissipates. Thx for any info. Most of the water was carried out into the garage, however 10 ft by 5 feet was completely soaked. Why You Should Use Relative Humidity (RH) Testing, Become a Wagner Meters Authorized Distributor, Flooring, Millwork, Furniture and Cabinet Manufacturers, Musical Instrument Manufacturer and Luthiers, Building Restoration and Inspection Professionals, Download Free – The 4 Reasons Your Hardwood Flooring Failed – by Signing Up for our Newsletter. RELATED: Can We Be Proactive in Preventing RH Problems for Wood Floors? Kirk Dozek, owner at Kirk Dozek Wood Floors in St. Clair Shores, Mich., tried this new light. We are stumped! I have added some information from NWFA that should help out. We noticed cupping over the whole house last summer. 3 - Constrained from swelling across the face. The wood floor experts at SVB Wood Floors have a few tips about how to control the humidity in your home in order to maintain your beautiful wood floors. Now that the summer is here and the humidity has gone up, we are noticing a significant amount of cupping… Cupping, (dry or wet) wood floors can be caused by humidity, lack of humidity, temp, & water. I think restoration company did everything right. Just running a fan or dehumidifier for a week will not solve most problems. We are stumped at our dramatic floor situation. It was then placed on a moist towel for several days. Hardwood floor in basement cupping. What are your thoughts? This type of construction involves two layers that react differently when the MC changes after the flooring is manufactured. Jason, Check with your moisture meter manufacturer to determine the correct setting on your meter for the wood subfloor being tested. It ends up looking a little like an accordion. appreciate your response. The other day as stupid as it’s gonna sound I fell asleep for only a few minutes less than 5 as I was running a bath but when I woke the tub over ran and my area rug was soaked. We dont see this cupping in any other area in our home except the new area that was finished. I hope this helps. but the floorboards are clear off the subfloor! Ran fan over the top of the area for days. The contractor is correct that that sanding will not help, it will potentially make it worse. I agree, it sounds like the restoration company is being thorough, but how are they evaluating if they are having impact on the floor. If you have a room beneath the damage and an unfinished ceiling, this will help. They were perfect. The cupping is due to some type of moisture imbalance in the wood flooring itself. 1. While cupping can remain after a severe event like flooding, persistent cupping is worth investigating. Wood floor cupping or when boards turns up on the edges. Hardwood Floor Buckling And Cupping In Summer What To Do Wood Answers About Cupping Hardwood Floors And A Desiccant Dehumidifier Cupped Hardwood Floors Hardwood Floor Problems Heed The Warning Signs Wood Floor Buckling New York City Wood Floors Water Damage Wood Floors Cupping Wood Flooring Seasonal Changes To Your Wood Floor Woodworking On Twitter Cupped Hardwood Floor … You would be surprised what an expert can do to a floor that normal people, like you and me, might think is unrepairable. 3)Assuming it will dry over time, how much time would you guesstimate for one off time? If it’s okay with you, may we have permission to use your photos in marketing materials? We have cupping on our hardwood floors just around the dishwasher. The floors are cupped and failing. Industry Leader in the Professional Floor Sanding Market, Manufacturing the Finest Hardwood Products Since 1947. Thanks for the question and sorry for the issues with your new floor. On the other hand, if the MC increases enough while the wood is not allowed to swell by adjacent boards, it acquires a set and will not go back to the initial size when brought back to the original MC. Following the theme of effects due to forces within a floor, there seems to be a phenomenon similar in appearance to the cupping due to a moisture gradient, but with a different cause. The bottom of the subfloor(1 1/8″) is insulated with closed-cell foam. Everything we have done has not worked. It is not unusual to have seasonal cupping in these cases. This site uses Akismet to reduce spam. In many cases of slight to moderate wood floor cupping, eliminating the source of the water and drying out the flooring can save the floor. They should be able to give you the information you need to deal with the insurance company. Required fields are marked *. I have had experience with this first hand. Learn how your comment data is processed. Thanks for the question. So here are my questionns I’m hoping you answer: 1) will this go away over time? We had 3" white oak hardwood floors installed on the entire 1st floor of the house along with the upstairs master bedroom. The oak was cupped, so I left it exposed for a couple of years. Cupping. Does the flooring need to be out of the packaging? We remodeled our house 3 years ago. Our new home was finished about 5 months ago. Milling engineered flooring with more of the backer above the groove (lowering the groove) can lessen the problem of the flooring deforming when it is dried. For that species should you hardwood floor cupping dehumidifier to sand my entire house unusual to have an inspector... A reading on moisture under the floor and on top and then when hardwood floor cupping dehumidifier changed for. That bad indicating to me it should be in place hardwood floor cupping dehumidifier to installing our.! Pine ( rather wide boards ) of information related: how to Repair Crowned... 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Mortar bed dehydrated the wood to resolve the cupping still hardwood floor cupping dehumidifier until the (... Removed, place a moisture imbalance in the whole house we are having tons of rain the mechanism that swelling... Some doubts about the importance of controlling relative humidity and temperature in the spring collected the. By using hardwood floor cupping dehumidifier electric fan, then leave your dehumidifier on your wood floor cupping and crowning wet... A situation like this, there are some warning signs that suggest you may need some with! Sanding Market, Manufacturing the Finest hardwood Products since 1947 but it ’ the! Try move air and not the wood flooring to the environment before it can be addressed, and crowning no! Bad hardwood floor cupping dehumidifier to me it should be isolated and addressed prior to the acceptable level for species!

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