The floors sat in the house for over a week before being installed. The engineered wood floors are installed on a raised pier and beam foundation. It depends how noticeable the cupping is as to whether it is worth removing the floor and redoing it. And, below, here's a cupped engineered board. Thanks for the question and sorry for the issue. Any air that has a relative humidity (RH) above zero has water vapor mixed into it. To avoid these mistakes, there is a way to test for a change in your home’s ambient conditions over time. 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. I hope this information is helpful, best of luck! The cupped board area is maybe 4 x 4 foot area. We noticed cupping over the whole house last summer. It can still react with the moisture content (MC) in the air around it. Wood Floor Cupping: Why Does it Happen & What Can You Do? When they left today…. Utilize provisions such as vapor retarders to control moisture intrusion into the flooring. Remove everything from the room. Cupped wood flooring should not be sanded down flat until it is completely dry, Reichel said. Serv Pro was in our home for 5 days with 6 fans and dehumidifier. Ways to Prevent Hardwood Floor Warping. Like cupping and buckling, crowning is a defect a wood floor can develop when exposed to moisture. This moisture imbalance could be from the bottom or it can be drying out from the top. My floors are stained with Jacobean stain. In June, I began to notice cupping throughout. Pry off shoe molding carefully with a pry bar so you can reinstall … In this case, the moisture reached a level in the flooring that was sufficient to generate areas of buckling and splits in some boards. D. Follow the flooring manufacturer’s moisture testing, acclimation, installation, and maintenance instructions to retain all warranty coverage. Our orginal home is on a crawl space but the extension was done on a concrete slab. First, I have no idea what 99% represents, so its hard to evaluate that piece of information. The result is gapping between boards when the floor is dried because the boards are narrower. No moisture. Shouldn’t the installer have told us about moisture issues, and used a moisture barrier prior to installing our floors. Crowning. Restoration company got to work immediately removing water, set up fans, dehumidifiers. In addition, there are small cracks between planks indicating water seeped into planks and was not simply sitting on surface of hardwood floor. You can see small shadows where the edges of each floorboard are slightly higher than the middle. The one underneath my bed which was furthest from the entry of the water and got pretty wet doesn’t have a protective pad underneath it but the area rug that got hit by most of the water and because the pad underneath (which ironically enough I bought in order to protect the floors) was made of felt it absorbed a lot fo the water and cause some cupping in three areas. Remember we sprayed the entire floor with the foam. With a new addition and concrete, I would imagine the concrete was not sufficiently dry prior to the floor installation. Look on http://www.nwfa.org for a certified inspector. Industry Leader in the Professional Floor Sanding Market, Manufacturing the Finest Hardwood Products Since 1947. However, if your flooring was not properly installed or has not been appropriately maintained, permanent and preventable damage may occur. The mechanism that causes swelling can be understood by looking at the cellular structure and organization in wood. Please see below the information from NWFA. Water, as with just about any household issue, is almost always the cause of hardwood floor warping. A floor that has water introduced to it from the top may cup as the water goes between the boards and enters the wood from the bottom. Since wood reacts to moisture so easily, floorboards can warp as they react to the change in their internal moisture content (MC) after the floor’s installation. I would recommend that you seek out a National Wood Flooring Association certified flooring inspector at https://www.woodfloors.org/find-a-professional.aspx to evaluate and give you specific recommendations. My apartment has sealed wood floors but it’s those that snap in. The alternative way: Another option is to tear-out the wood that is wet and replace it. 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. I’ve also been running a dehumidifier in the house and the relative humidity has been around 50 or 55. Confused as to why the flooring would expand so much during winter ????!!!! 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. Good luck. The temperature and humidity must be within the manufacturer’s requirements. • Inadequate or inoperable HVAC systems resulting in elevated humidity levels. appreciate your response. But there is a serious flaw in that thinking. The floors were refinished last year (could that have affected just one spot? 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. 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Would have caused the cupping is a cure-all that will perform well in all environmental.!
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