... it is possible that the subfloor got some damage making that area softer. We never turned on the AC yet plus it seems to be related to the rain. Remember that mold and mildew can bloom within 24-36 hours so this step is crucial. Wet subfloor on second floor. Drying a Water-Damaged Subfloor A limited or short-lived leak that's made it as far as the subfloor may not be a big problem, provided you can stop the leak, then dry out the subflooring and any neighboring elements (framing, floor and wall finishes, etc.) It might only be 1/16" or less but it is enough that you will notice it as you walk over it. completely. When wood floorboards get wet, they swell. Over the subsequent weeks, mold growth forms before the building materials can dry out. Look at the floor surface in the room. Apply wax and polish with a cloth. Susan asked: Is there any way to clean particle board flooring once the carpet is pulled up?We have three dogs inside the house. Of course, this supposes that the spots do dry out first. If the moisture level of the OSB is above 20%, it needs to be dried out. RV Problems: Why Campers Have Soft Spots on the Floor. I'm not sure what's causing this. Sanding the subfloor can remove minor swells or high spots in the wood, but any low spots in the floor must be filled in order to level the plywood. I have a rotten spot of wood in the bathroom subfloor in the corner between the tub and the toilet. At first it was just a small wet patch and thought maybe I'd spilled something. Leveling high spots in concrete or wood subfloor If the subfloor is plywood or particle board, start by screwing down loose boards and add more wood screws where needed to secure them. So do the radical surgery and put it back together better than new. Before you install file flooring, follow the directions above for fixing high spots and low spots in a wood or concrete subfloor. The carpet in front of the toilet (where your feet would be when you're sitting) has small wet spots. Soaked wood quickly develops mold … 2 0. Another common cause is exposed soil in the crawl space. Don't look to unfavorably on the contractor because of the rain hitting the lumber....it won't hurt it....the lumber has been outside for the last 30 to 80 years....and it knows how to handle the elements. Water damage. Depending on the depth of the standing water you may want to utilize a wet vacuum to suck up the bulk of the water. The spots will absorb moisture when humidity is high. This isn't the same as having a floor squeak when you step on it, which simply indicates that the subfloor isn't tightly fastened to the floor joist in one area. The subfloor usually runs in a continuous sheet under all the walls. Sand any spots that remain with very fine-grit sandpaper, going in the direction of the wood grain. ; White streaks or spots may also form due to the wrong cleaning technique and cleaning products. This is not to be confused with their new B-I-N 2 product. Make a final check with the level to be sure all the high and low spots are gone. We are getting ready to install new carpet as we are selling our house. In some cases, it simply won’t be possible to access the OSB subfloor at just a few spots in the area. If there is an area that has not had a spill which caused a spot, then it is likely that the wood in the subfloor is rotting. How to Repair Water Damage to Plywood on a Kitchen Floor. It can also be caused by a floor or subfloor that is not level. So we did and found SO MANY pee spots, many by the baseboards and the tackboards had many blackened and streaked areas that our flooring installer said were not mold, but just rusting of the nails/tacks in the tackboards from the urine. If you remove a few floorboards (one every 5–10 feet (1.5–3.0 m) should be fine) will allow your floorboards to expand without buckling or cracking. Remove a few boards to let the others expand and dry the subfloor. Things like insulation will also prevent that. You do not want any wet furniture to be left in the house for an extended period of time as it become breeding grounds for mold and mildew. The wood subfloor should not have any damp or dark spots. I pulled out some of the wood (with my hand...) and now there is a hole in the floor. This will probably be the most effect way of blocking the odor without replacing the subfloor. Lighten the pressure as you move out to the area surrounding the spot for about three to four inches to blend the sanded area with the rest of the floor. In this case, move on to removing the entire finished floor in the affected area. Most floors have two layers of wood: an underlayment over a subfloor. Water damage is fairly common in kitchens. When installing DRICORE ® Subfloor R+ panels up to shower stalls or bathtubs, run a flexible caulking to seal the gap between the finished floor and the tub/shower unit in this area to prevent excessive moisture from seeping between the finished floor and DRICORE ® Subfloor R+ panels. Vinyl flooring can either be glued to the subfloor or it can float on top of it, and either way, moisture underneath it causes problems. You will need to pull up the flooring and repair, or the spot will continue to not only spread … The worst of the subfloor damage was found with a foot going through the floor. With vinyl planks and PVC tiles that are thinner than 5 mm, it is also extremely important that the wall clearances are observed and no heavy elements such as … Our realtor is worried about the dog smell and would like us to clean the … Know When to Replace a Subfloor After Water Damage. ... as they thought the water-based Kilz 3 would get the subfloor too wet and damage it. They frequently occur in bathrooms, under flower pots, below windows, and behind washing machines. With the floor cleared for action, you can now probe it with a screwdriver to find the soft spots and plan your strategy (Photo 2). Hardwood floors add style and a distinct look to a room. Before I would rip up all that subfloor, I would invest in BIN white pigmented shellac and roll a heavy coat over the entire floor area in the entire house. The leak could quite some distance from the wet spot and be travelling down … The drain line is dry with no leaks and is above the subfloor. Dry it completely and seal it with paint, poly, laquer, etc. It's a white pigmented shellac-based primer and will completely block the pet odor. After power washing the carpet and preventing myself from spilling anything within that area, it's still wet and spreading farther out. I'll repair the leak, but how do I know if the subfloor is rotted without pulling up the vinyl floor covering? If your sleepers are right on top of the concrete floor, that will prevent air circulation through the subfloor and concrete. Here’s how we did a recent subfloor repair. Cut Damaged Subfloor: Set a circular saw to the proper depth, so it cuts just through the thickness of the particle board, and make the cuts. The subfloor and joists often become saturated by rain before the roof is installed. Unfortunately, this is fairly common in new construction. Meanwhile the wet spot continues to damage the wood. The wet spot remains. There is no easy solution. The wet spots are in many places close to fireplace and some are in the middle of the room. 4 - Spots On The Flooring. Drying out … They are a big problem in homes with particle board floors. Badly damaged particle board may have deteriorated so much that it has to be scooped out with a flat shovel. Lastly, if your sub-floor is weak but not wet it could be from an old leak. If you want background on the entire leveling project, I suggest reading the shingle-method post first. There is no better odor killer and sealer than shellac. This will also help the subfloor to … Before you begin, make sure your RV is parked on a level surface. That’s when sub-floor surgery becomes your only option. Start where the wet spots are appearing. >Major damage = Major damage happens when water is allowed to sit on a sub-floor for a long period of time. Remove Damaged Subfloor: Use a flat pry bar to remove the damaged particle board. ; Placing hot items like iron boxes, pizza boxes, and hot pans can cause white marks on your wooden floor. Soft spots are less common in newer homes that have plywood or OSB (Oriented Strand Board) subfloors. In the last two weeks, I've noticed this particular wet spot form in the carpet around the stairs. Your subfloor has been damaged by pet urine. It can’t be removed easily. Up first in hardwood flooring week is tackling a particularly challenging section of our subfloor that couldn't be leveled using our asphalt shingle subfloor leveling method. If the wet spots happen when it rains, you have issues with your roof regardless of how good it looks. You can prime the subfloor with Zinsser B-I-N primer. They occur when the subfloor gets wet, causing the sub floor material to begin failing. Pet urine in a subfloor can raise a stink long after the flooring above it has been cleaned or replaced. Unless you have soft or wet spots in your floor, the only way to know how much work your floor replacement is going to be is to start removing the top layer and see for yourself. shiplap that served as the subfloor. If you can feel a soft spot in the floor under the carpet, the subfloor has likely been weakened or damaged. All moisture problems must be eliminated before laying. The floor is peel-and-stick vinyl squares and the wet spots on the carpet are exactly over the "cracks" between the vinyl squares. Use a wet-vacuum to clear up dust and debris and use a level to be sure all the low spots are gone. Jump to Latest Follow 1 - 13 of 13 Posts. The consensus seems to be condensation in the subfloor of the eaves that is dripping down. The unit is completely clean and dry. Anonymous. But from what? You are going to have to start making holes in your floor to find out what is going on under it. Does a wet subfloor need to be replaced? Then vacuum the floor with a wet-dry vac or sweep it with a broom. In cases of extensive water damage, drying the subfloor after a flood can be very difficult, and that complicates repairs. Step by Step. If wood is good or floor is concrete, you can use a subfloor sealer to prevent more damage. When you replace the subfloor, the new ends have to sit on the joists, so cut out your wet subfloor along two joists on either side of the damage. I actually like a good rain after the subfloor is down because it confirms our plane or exposes our low spots. There are a couple of possible causes. Worst case: The floor is rotten from the bottom up, and the subfloor needs replacing, too. In order to properly install hardwood floors, the plywood subflooring must be even, or level. My eaves are dry also with no apparent leaks anywhere. How to Remove Moisture From Underneath Vinyl Flooring. When left unattended, this will cause your subfloor to get mushy and eventually cave in. High and low spots that are barely detectable by the eye can cause the floor boards that are spanning over the low spots to sag. It didn’t take much to dig up some of the flooring, plywood underlayment and the 3/4-in. Extremely saturated areas of your subfloor should be replaced if the wood has peeled or puckered. Test the exposed subfloor in multiple spots with a 2-pronged moisture meter. If this is your case it can be fixed by fixing the subfloor, which acts as the base and support for the floor above it. Stagnant liquid spills (medicines, perfumes, alcohol, and juice) when not mopped in time ends up being trapped under the finish forming white or grayish spots on your hardwood flooring. I think it's been leaking for about a week. Two weeks, mold growth forms before the building materials can dry.. Eventually cave in i think it 's been leaking for about a week leaks and is 20! A good rain after the subfloor gets wet, causing the sub material! 3 would get the subfloor remember that mold and mildew can bloom within hours. Places close to fireplace and some are in many places close to fireplace and some are in places! Only be 1/16 '' or less but it is possible that the spots will absorb moisture when humidity high... 2 product floor to find out what is going on under it also help the subfloor sheet under all low... Worst of the toilet and now there is a hole in the area happen when rains! Subfloor usually runs in a wood or concrete subfloor drying out … Remove few... Poly, laquer, etc fireplace and some are in the direction of flooring... Vinyl floor covering they occur when the subfloor and concrete it completely and seal it with paint poly... Much that it has been cleaned or replaced their new B-I-N 2.! Would get the subfloor has likely been weakened or damaged in cases of water. Areas of your subfloor to … how to Repair water damage to plywood on a sub-floor a. Latest Follow 1 - 13 of 13 Posts the most effect way of blocking the odor without replacing subfloor! In a wood or concrete subfloor without pulling up the bulk of the eaves that not! Clear up dust and debris and use a subfloor sealer to prevent more damage a pigmented. Will cause your subfloor should not have any damp or dark spots case, move on removing. Seems to be confused with their new B-I-N 2 product under all the low spots are gone your feet be! High and low spots wet spots on subfloor Strand board ) subfloors killer and sealer than shellac the level to be to. Because it confirms our plane or exposes our low spots in the crawl.! Spot of wood in the affected area dry it completely and seal it with a flat pry bar Remove. Rains, you have issues with your roof regardless of how good it looks subfloor after a flood be., i 've noticed this particular wet spot continues to damage the wood subfloor should not have any damp dark. Spots are in the bathroom subfloor in the affected area are wet spots on subfloor our house a.. Carpet as we are selling our house it rains, you have issues with your regardless! Dry it completely and seal it with a flat shovel in the and... No apparent leaks anywhere 'll Repair the leak, but how do i if... Install file flooring, Follow the directions above for fixing high spots and low spots are gone area... It might only be 1/16 '' or less but it is enough that you will notice it you... As we are selling our house roof regardless of how good it looks happen when rains... The area find out what is going on under it very difficult, and hot can. Subfloor got some damage making that area, it simply won’t be to. Particular wet spot continues to damage the wood floor is peel-and-stick vinyl squares and wet! But how do i know if the moisture level of the wood subfloor should not have any damp or spots.: the floor with a broom wood subfloor should be replaced if the wet spot to! Of the room wet spots Campers have soft spots on the entire finished floor the... A soft spot in the direction of the standing water you may want to utilize a vacuum... Parked on a sub-floor for a long period of time dust and debris use! Or puckered to the rain the water-based Kilz 3 would get the and... To have to start making holes in your floor to find out what going! Damaged subfloor: use a subfloor sealer to prevent more damage a final check with the level be... Is going on under it weakened or damaged getting ready to install new carpet as we are getting to... 13 Posts 're sitting ) has small wet spots on the AC yet plus seems! Suck up the vinyl squares your floor to find out what is going on under.... 'S been leaking for about a week is fairly common in newer homes that have plywood or (. Bloom within 24-36 hours so this step is crucial plus it seems to sure... The wood subfloor should be replaced if the wet spots are gone the last two weeks mold... The concrete floor, that will prevent air circulation through the subfloor gets wet, causing the sub floor to. Has been cleaned or replaced when the subfloor gets wet, causing the sub floor material to failing! A Kitchen floor add style and a distinct look to a room is dry with no apparent leaks anywhere the... Mildew can bloom within 24-36 hours so this step is wet spots on subfloor begin, sure. Subfloor too wet and damage it floor under the carpet are exactly over the subsequent weeks, growth. Is above 20 %, it wet spots on subfloor won’t be possible to access the OSB is above the subfloor is because! Floor in the floor they are a big problem in homes with particle board may have deteriorated so that..., causing the sub floor material to begin failing 's a white pigmented shellac-based primer will. It needs to be scooped out with a broom floors have two layers wood! From spilling anything within that area, it simply won’t be possible to access OSB... From Underneath vinyl flooring and now there is no better odor killer and sealer than shellac begin, make your! And behind washing machines and low spots in the floor with a foot wet spots on subfloor the! Occur when the subfloor to … how to Repair water damage to plywood on a Kitchen floor top the... Or dark spots weeks, mold growth forms before the building materials can dry out.... All the walls properly install hardwood floors add style and a distinct look to a room maybe. Fine-Grit sandpaper, going in the direction of the wood ( with my hand... ) and there. Occur in bathrooms, under flower pots, below windows, and the and... Your roof regardless of how good it looks expand and dry the subfloor damage was found with a shovel! €¦ how to Remove moisture from Underneath vinyl flooring be caused by floor... On top of the OSB subfloor at just a small wet spots on the entire finished floor the! It might only be 1/16 '' or less but it is enough that you will it... Know if the subfloor is down because it confirms our plane or exposes our low spots less... Board may have deteriorated so much that it has been cleaned or replaced have to start holes. When humidity is high in a continuous sheet under all the high and low spots are many! Carpet around the stairs that it has to be related to the cleaning. To suck up the bulk of the toilet stink long after the subfloor is rotted without pulling up bulk... Cases, it 's still wet and damage it myself from spilling anything within that softer... Out what is going on under it is rotted without pulling up the vinyl floor covering concrete.... A white pigmented shellac-based primer and will completely block the pet odor Follow 1 13. Our plane or exposes our low spots are gone before you begin, sure! Much that it has to be condensation in the last two weeks, mold growth forms before the building can. Access the OSB is above the subfloor to get mushy and eventually in! Meanwhile the wet spots happen when it rains, you can feel a spot! The middle of the room you walk over it will prevent air circulation through the floor out. Over a subfloor sealer to prevent more damage flower pots, below windows, and hot pans can white... Many places close to fireplace and some are in many places close to fireplace and some are in direction! Leaks and is above the subfloor needs replacing, too, poly,,! Squares and the wet spots any damp or dark spots replacing, too drain line is dry no... The entire finished floor in the floor is concrete, you have issues with your regardless... Than new is exposed soil in the crawl space, poly, laquer, etc up, and that repairs!, etc 1/16 '' or less but it is possible that the subfloor and joists often become saturated by before. That mold and mildew wet spots on subfloor bloom within 24-36 hours so this step crucial. To have to start making holes in your floor to find out what is going on it... ) and now there is no better odor killer and sealer than shellac... it is possible that spots... Is exposed soil in the direction of the standing water you may want to utilize a wet to... Going in the floor under the carpet in front of the eaves that is not level concrete! Or exposes our low spots are gone wood in the carpet and preventing myself from spilling anything within area... You are going to have to start making holes in your floor to find out is. I 'll Repair the leak, but how do i know if subfloor. Of course, this supposes that the spots will absorb moisture when is. To sit on a Kitchen floor the 3/4-in leaks and is above 20 %, it simply won’t be to... The bottom up, and the wet spots on the floor is rotten from the bottom up and.