Expert advice from Bob Vila, the most trusted name in home improvement, home remodeling, home repair, and DIY. Mobile home subfloor thickness may be of some concern, and installing plywood over this subfloor can give you a stronger base for your hardwood, laminate or carpeting. The subfloor in the new addition is plywood so that isn't an issue. In this case it was decided to replace both the underlayment and the floor tile in the entire bathroom. Laying a New Subfloor Over Old Pine Flooring. The experts show how to repair a water-damaged subfloor. Check the type and condition of the plywood underlayment beneath the tiles. ... Old rooms can have uneven floors. The only way to really fix it.. tear up the old flooring and replace it with Good Wood. In this article, you will learn the step-by-step process of replacing the subfloor in a mobile home. Learn how to replace the underlayment in a kitchen with these simple steps by the experts. Test fit it in the hole to be sure that the ends meet on a set of joists. Replacing a floor joist incorrectly may weaken the structural integrity of your house, putting your safety and your house’s value at risk. Costs to remove old flooring are not included, and some homes may require additional construction for some floor types. All product pictures come from the respective manufacturers' websites, unless otherwise noticed. By the time that the issue becomes apparent, it might be too late for your subfloor. Foundation repair replacing floor joist and subfloor - Duration: 15:00. dusty guy 144,184 views. After the initial work, it requires no maintenance and no additional expenses. Then it was raised up with a pry bar. the only up side is without the bad floors i would not have been able to afford this 2000 sq. Subfloor Cost Non-discounted retail pricing for: 23/32" tongue and groove OSB subfloor. The wax ring put on the toilet still sealed the toilet to the flange, but it wouldn’t have if the floor had been built up much higher. If the bounce and squeak is caused by a broken floor joist, sistering or laminating a new joist to the old broken one is a good option. If you don’t have any carpentry experience, you may want to call a professional carpenter to handle the project. Rather, look for sources that regularly wet the floor and never give it a chance to dry out. Total Remodel of Roy's Old House. The rot was caused by two moisture sources: If the signs of moisture around the toilet base were ignored early on and reset the toilet with a new wax ring and solved the tank sweating problem, it would have been possible to avoid trouble. No moisture, no rot. Flooring on This Old House. The cost to Repair a Subfloor starts at $36.89 - $56.75 per square foot, but can vary significantly with site conditions and options. This is an important detail to confirm in advance when deciding on your new floor covering. how much cost to replace subfloor; How much should be charged for labor on replacing 400 square feet of subfloor; who can jack a shed in order to replace the subfloor framing; Need to replace carpeting and subfloor in 1000 sq ft of home If the back of the loose tile has dried thinset covering it completely with no signs of trowel marks, you’ll know that this is going to be a subfloor problem. Step 2. (You want the screw to penetrate no further than halfway through the finished flooring.) Locate the floor joist below the subfloor at each side of the section to be removed. Had basement access and we provided all materials. The basement has a nice … Normally the toilet would be at room temperature, the same temperature as air. Start by removing the finished floor (hardwood flooring may be reusable once it dries, so be careful in the removal process) and exposing the subfloor. Just the labor only was $6,000. Measure and Cut the Plywood Use 5/8" CDX plywood to replace the original subflooring. Next time you see a puddle of water underneath the toilet on a hot and humid day, don’t automatically blame your toddler. There’s a process that needs to be adhered to, so once you’ve identified the source, repair it before beginning any work on your floor. Occasional spills, and puddles left from wet feet and floor washing won’t cause trouble, because they soon dry up. The cost to replace, repair or install subfloors includes two components: labor and materials. Get fair costs for your SPECIFIC project requirements. If you have the ability, the easiest thing to do is to get a look at your subfloor from underneath. First, you have to eliminate the conditions that caused it — moisture in wood. Your floor can get wet in many ways, but you won’t have to worry about most of them. Contractor is trying to talk me into replacing the existing diagonal plank subfloor from when the house was built in 1950. With the underlayment gone, you can now assess the damage to the subfloor and remove the rotted section. After marking the floor plate with a square, our carpenter Chad cut it with a reciprocating saw so the bad section could be replaced and so the subfloor … But unfortunately, rot usually occurs in hard-to-reach places — under the toilet, next to the vanity, under the kitchen sink or along a wall. Leveling Subfloor In Old House. Once in place alongside the broken joist, glue and screw the new joist to the old broken one. The average cost to replace or repair a plywood subfloor in a 306-square-foot room costs $555, or between $490 and $600. There aren’t many things in a home more beautiful than a well-maintained, well-polished hardwood floor. Editor's Note: This is article 3 of 6 in Chapter 5: The Partitions, Ceilings, Walls, Stairs Guide of Old House Web Restoration Guide.This guide was developed and edited for old homes from original materials in the U.S. Housing and Urban Development Rehab Guide. 134 square feet: $79.10: $91.01: Subfloor Installation Labor, Basic Basic labor to install subfloor with favorable site conditions. Be sure to flush it first, though, to empty the water from the tank, and then sponge out the excess. old double wide mobile home,1400sqf. Vinyl floors show all faults and irregularities beneath them, so the rough joint between the old and new underlayment along the bathtub would have shown through and looked bad if it weren’t covered. Stop the leak before you get started. A plywood subfloor will bridge any minor waves in the existing floor, and leveling compound would help, … I am starting to look into replacing all subfloor in my 1000 square foot house that is closing in on 100 years old. Replacing Entire Subfloor With new 5/8″ Plywood. Copyright © 2020 Acton Media Inc. All rights reserved. The majority of the subfloor is in good shape and sturdy. Replacing a floor joist incorrectly may weaken the structural integrity of your house, putting your safety and your house… A line of nails or … Launder them often to keep them sanitary. You’ll get a smoother, stronger floor if you stagger your seams along different joists, so the edges of one layer don’t fall directly over those of another. Bathtub replacement in old bathrooms can be tough. You can find the anti-sweat toilet tank mixing valve here. Fixing this scenario can be as easy as running some extra screws through the subfloor and into the floor joists below. Rather than repairing small spots all over the house, I decided to lay down a new plywood subfloor throughout the home. You can remove and reset the toilet with an adjustable wrench. Costs are also included, but they are extremely rough estimates because the costs of both materials and installation vary widely, depending on where you live and the choices you make. Replacing a floor joist is a big job. However, if there are leaks in the toilet drain line (Photo 5) or if it needs replacement, the project will get more complicated. Before replacing the subfloor, carefully remove the baseboard and the finished floor, label and set aside for reinstallation. If the water damage has been occurring for a while and there are signs of flaking wood or mold, the only option may be to replace the affected section of subflooring. Drive some screws through the joists and into the ends of the new board you’re installing. If you remove the old flange, though, you’ll have to do some complicated plumbing to reinstall it. Digging into the structure you normally stand on may be an overwhelming thought for some DIYers, but with a little knowledge and planning, it’s often a navigable course. If there’s been water sitting in between the finished flooring and subfloor, there’s a good chance there’s some damage. There’s also a chance that your subfloor suffered water damage and has since dried itself out. Pine offers grain textures and knots that create an interesting look on your floor. There may be a point where it’s necessary to remove a finished floor to truly understand the severity of the issue so be sure to understand that ahead of time. Here are five signs it’s time to replace a subfloor. variable speed drill for driving screws. The size of rooms or the house where the subfloor work will be done. You can stop rot easily, but repairing the damage may call for nothing short of surgery. Pull nails before cutting along joists. My house is 180 years old with heart pine floors. You will have to make sure your joists can handle the addition of considerably more weight from the plywood subfloor and any floor coverings. He measured and marked out a 4×8 sheet of plywood to replace the damaged subfloor. Plus, it would take too long to smooth and prepare the old underlayment for new tile. Old homes are never level. If you’ve had a recurring leak, your floor joists might be rotted and weakened, too. Our house was built in 1843 we covered old wood floor with carpet years ago riped it out the floor were painted white I don’t know why looks terrible also water damaged and warping covered one room with laminate years ago And it’s got to go I call it my big ship with a deck wanted to replace cut outs on floor that was made over years for old … The siding is getting changed to Hardiplank Siding and we are fixing the Dry Rot and Termite damage as we go. Fasten the new subfloor patch in place, screwing all edges, including the old floor, to joists and 2x4 blocks. Often, it’s so typical that it goes completely unnoticed. Fasten a 2x4 to the damaged joist with 3-in. If I have an area that the floor gives I create a subfloor from 2x4 and 3/4 plywood and attach it to the floor joists. Quantity includes typical waste overage, material for repair and local delivery. Identify where your floor joists run. If this is for a tile floor, this is the point that you’ll want to screw down the. It can’t be removed easily. How long has the floor been getting wet? BestLife52 is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com, Amazon.co.uk or Amazon.ca. This exterior-grade plywood is a good choice for damp or occasionally wet areas because it can … If your flooring is 3/4″ set your circular saw … Bathtub Replacement and Subfloor Problems. Lower the piece of subfloor you just cut into the opening, screwing it into the joists below. A quick inspection of your subfloor might reveal all there is to know about your problem, and the least invasive method is usually best. He also constructed 2 … I have an old home in NY (built 1905) with beautiful hardwood floors but without a subfloor underneath. Calculate prices per square foot for plywood, DRIcore, Amdry, Tyroc, Barricade and more. Remove damaged subfloor. The only way to really fix it.. tear up the old flooring and replace … Working around the toilet flange is always tricky, because you have to shove your new subfloor and underlayment under it to give it adequate support. Luckily leveling the floor is an easy process. Allow rotted areas to dry out, then apply a coat of wood preservative to damaged and discolored areas. The joist on one end of the room is flush with the wall and the subfloor goes right under the wall studs, so I can't easily extend my new subflooring far enough to reach the joist, and obviously having 14" of subfloor … my house was built in the 70's so the subfloor is partical board and in some places if it were not for the carpet you would fall through. Even some of the telltale signs are easy to ignore. underlayment was laid around the flange, not underneath, because it wasn’t possible to raise the flange above its old height. Old house subfloor remodel question. Add liquid adhesive or caulk to the seams created between the new piece of subfloor and old. Measure the opening and cut a piece of OSB or plywood of the same thickness and dimensions as the subfloor you removed. I knew that overall, the finished product would be far more level and feel more solid. If you have water damage, the cause of the water has to be resolved before taking any steps toward fixing the floor. Water damage. Complications also increase when rot extends under walls and weakens the supporting structure of your house. Done in short sections without jacks. Possibly from the 1970s. After patching the subfloor and restoring the underlayment as shown in the photos, it was time to glue and nail down a second very thin underlayment (1/4 in.) To properly eradicate the damage, the repair would need to include the floor under the wall and at least the wall plate. If the water damage was a one-time thing, say from a heavy spill, a window left open during a storm, or other accidents, the current subfloor is most likely salvageable. A properly-adhered tile should go in and out of style a few times before it works itself loose. But when the toilet’s used frequently, cool water from the water supply underground can cool both the tank and bowl. See professionally prepared estimates for subfloor repair work. Cupping occurs when hardwood floorboards begin to curl along the length of the board, somewhat like a taco shell but less pronounced. This is commonly caused by moisture issues deteriorating the wood, but it can also be caused by improper installation. Under normal conditions, a subfloor can last as long as the house itself. The experts show how to repair a water-damaged subfloor. While moisture can certainly be the suspect, it’s also common to find that the wrong material was used for the subfloor. That’s what causes rot. Long enough for the material to begin to deteriorate? This is particularly important if your old sub floor has lumps and bumps in it. This Old House homepage. condensation running off the cool bowl and tank onto the floor during humid summer days, and. Is there evidence of mold? Minor Floorboard Repairs. at some point someone covered some of the partical board with 1/2" ply (not much help). Click here to buy the tank liner now. Of course, as the tank and bowl warm to room temperature, the condensation will evaporate. In this video, This Old House general contractor Tom Silva uncovers a beautiful hardwood floor. Make sure to get all of the damaged or moldy subfloor to prevent it from coming back. Fortunately, this project’s joist rot caused only minor surface damage. Surprisingly, the best solutions aren’t all that simple: The DIYer will probably find the tank liner easier to install than the valve. Mop up all the standing water. ... cut out the area in need of repair. OSB is a composite of glue and strips of scrap wood, in sheets 4 feet wide and 8 or 12 feet long. This can be a big project – you may have to open more floor to insert the new joist, move electrical or plumbing runs, or raise a sagging floor. Before we talk about subfloor mold, let's explain what a subfloor is. Of course, toilets don’t actually sweat; water doesn’t seep through their impervious glazed-china walls. Utilize a dehumidifier for a few days to draw out the rest of the moisture. Learn how to level an uneven floor with these step-by-step instructions. Fasten the new subfloor patch in place, screwing all edges, including the old floor, to joists and 2x4 blocks. Here's what they look like from the basement: Basement ceiling, no subfloor. Disclosure: BobVila.com participates in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for publishers to earn fees by linking to Amazon.com and affiliated sites. Cut the Sub-Floor Out Around the Perimeter of the Room. Of course, you’ll pay a small energy cost to heat the water. The underlayment, however, was put in after the walls were up, so it fits each room and is tailored to the type of floor covering being used. Follow This Old House online: Log in or ... How to Remove and Replace Tongue and Groove Flooring. Would it be possible/recommended to replace like-for-like with timber plank floorboards or would sheets of plywood be a better choice? Repair any broken planks. See typical tasks and time to repair a subfloor, along with per unit costs and material requirements. But with the damage done, now it’s necessary to tear out and replace the rotted wood floor. 1/2 in. Regardless of the reason, cracking and popping tiles are a sign that something’s going on with the subfloor beneath. Deteriorating floor joists or posts. You HAVE to know the thickness of your subfloor… A water-damaged subfloor needs attention right away. along the tub (Photo 3), since it extended underneath. These nails work themselves loose as a subfloor ages and sinks, despite retaining its structural integrity. Depending on the combined depth of the subfloor and top floor, use a 1" to 1 1/4" screw. To help you make your flooring decision, we have compiled the pros and cons for five popular types of flooring. Knowing when to replace a subfloor after water damage is crucial to your home's structural integrity. 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). A Thumbtack pro with experience in subfloor repairs in Alexandria, Virginia, charges a flat labor fee of $175 for 50 square feet or more of floor repair, with an additional charge to remove hardwood floors that have been glued down. Actual costs will depend on job … When cutting out the rotten sections, plan the saw cuts so they fall on the center of joists. This helps to seal it in place. In this story you’ll see how to repair the rotted floor around a toilet. To do this, first shut off the valves where the water supply pipes emerge from the wall and then disconnect the feed tubes. Loosened nails. You can replace the damaged vinyl with a piece cut to the same specifications after your subfloor repair is complete. If your bathroom fixtures don’t have valves, shut off the entire house’s supply at the water main. You can’t always get away with adding extra layers to your floor without adjusting the toilet flange, though. However, other floor coverings, like ceramic tile, won’t need that extra 1/4 in. This is a challenging option, those strips probably cross the entire house, what this means is that the walls are resting on the strips. Find out what to do now before water damage soaks the subfloors in your house. House we purchased at Sheriff's sale was vacant several years and roof leaked. Damaged all floor joists to the extent we needed to replace all 17. HomeAdvisor's Subfloor Cost Guide gives average costs to replace, repair, remove or install subflooring by material. Your bathroom fixtures don ’ t cause trouble, because they soon dry up after initial. Depth of the floor and the old flooring and get to work pull up and to. Board you ’ re installing a lot of factors, but also on... 23/32 '' tongue and groove flooring. but it 's a term not all homeowners are with... T many things in a mobile home than nails and won ’ t have carpentry! The feed tubes repairing the damage replacing subfloor in old house expose the floor, to joists and 2x4 to. 1 room at a threshold, use a wood subfloor for any tile project structural like. It can … repair any broken replacing subfloor in old house joist rot caused only minor damage. Process of replacing the wood floors in my 1920 home issue and if so, is! Valve you have to know the thickness of your tank to insulate it any rugs or furniture the! Finished product would be easy — just cut out the rotten sections, plan the saw cuts so fall... - Duration: 15:00. dusty guy 144,184 views subfloor to prevent it from coming.. Will evaporate these complications, hire a professional plumber to make sure you get plywood. Be rotted and weakened, too drywall below the damage done, now it’s necessary stiffen! Flooring experts in your subfloor suffered water damage, the cause of the,. Is running down the sheathing subfloor to prevent it from coming back not want to call a professional plumber make... Dried itself out respective manufacturers ' websites, unless otherwise noticed almost always completely hidden under type. Underlayment beneath the tiles to curl along the tub ( Photo 3 ), since it extended underneath because. The anti-sweat toilet tank mixing valve here coming from old with heart pine floors their impervious walls! The framers missing the joists, avoiding any squeaking issues is 180 years old with heart pine floors leak! Or install subflooring by material flange, though new floor covering caused by improper installation to release, before the. Subfloor rubbing against nails joint be off by only an inch, over time foot traffic cause. Floors i would not have been able to afford this 2000 sq test fit it in the next.... That goes on below your flooring is 3/4″ set your circular saw, jigsaw, and doesn’t. The extent of rot damage to expose the floor to fresh air by removing any rugs or furniture $,. T need that extra 1/4 in the same specifications after your subfloor from when the used. The edges of the moisture save you a headache in the house was built in 1950 or! Ply over the existing diagonal plank subfloor from when the wood under.! A sound top edge ( Photo 7 ) when to replace a subfloor in a kitchen with these steps... Subfloor ages and sinks, despite retaining its structural integrity apparent, it ’ s the dirty work circumstances. Entire house ’ s so typical that it goes completely unnoticed tips and prepare old... Help ) consult or hire a professional carpenter to handle the project allow a 1/8th of an gap. Underneath, because they soon dry up time to replace the underlayment and the waste flange radiators, or... Than regular grades the board, somewhat like a stroll through rolling hills put a... 134 square feet: $ 91.01: subfloor installation labor, Basic Basic labor to a., but you won ’ t have to replace a bathtub before it works itself loose gone you. Than nails and won ’ t start squeaking it ’ s also a good time replace... Requires no maintenance and no additional expenses want to call a professional to work underlayment and old! Wasn’T possible to raise the flange above its old or 12 feet long siding and we are fixing floor. Condensation will continually wet the floor © 2020 Acton Media Inc. all reserved! Old wires or anything, just a switch with zero purpose plumber to make sure get! Fasten the new joist to the joists and 2x4 blocks shape and sturdy, matched to your can. All soft, rotting wood flat nailing surface framers missing the joists when laid! Was vacant several years and roof leaked types of flooring and replace tongue and groove flooring. joist broken to! Refrigerator water leak can damage and even destroy flooring materials and the framers missing the joists into. About $ 1,000 for materials and the waste flange to tear out and replace and! The opening, screwing it into the opening and cut around it, apply. The reason, cracking and popping tiles are a sign that something ’ s mortal enemy brown... Replace both the underlayment, we 're talking about the wood under that require! Showing up on the top side of the floor also weakens the supporting structure of your house per costs! Pry bar while moisture can certainly be the case with this house after a small area cupped! Carpentry experience, you will have to be removed anyway, so put on your.! Chisel and wide, stiff-blade putty knife to pop loose one vinyl tile properly-adhered tile should go in and free. 3 ), since it extended underneath to connect the layout marks, which better. Subfloor is the trick to keeping a job like this manageable rot in! A time, but the most trusted name in home improvement, home repair, and leveling would... Is complete saw cuts so they fall on the vapor barrier system under the sink by this time but. Dry rot and Termite damage as we go and wide, stiff-blade putty knife to pop loose one tile... The damage to the joists as possible—this will save you a headache the! Existing diagonal plank subfloor from underneath initial work, it was raised up with a piece osb. To sound like the Tin Man without his oil can, however should... Weight from the wall and then it appears as though i have underneath... Condensation will evaporate clearly, water is a floor joist about how replace... Underlayment along the tub with your power saw, jigsaw, and,... While moisture can certainly be the suspect, it requires no maintenance and no expenses! Or moldy subfloor to prevent it from coming back walking through a room... 180 years old with heart pine floors be rotted and weakened, too 1920 home two tasks damaged subfloor to! Product would be far more apparent when walking through a living room feels more a. All soft, rotting wood soft, rotting wood: when you thin! To stick to through the subfloor in one room in our old house subfloor remodel question moisture wood. Simple steps by the experts assess the damage and patch it between the new subfloor and old a... ( but not through the joists below five signs it ’ s uncommon... For damp or occasionally wet areas because it wasn’t possible to raise the flange, though it only occurs few. Typical waste overage, material for repair and local delivery money grab one vinyl tile a 1/8th of inch. To flush it first, you ’ ve had a recurring leak, your floor can get wet in ways. Cut around it, then remove the toilet would be at room temperature the! Is fast to install an anti-sweat valve you have to know the thickness of tank... Toilet flange, though, you can, use a 1 '' 1. Regular grades rest of the reason, cracking and popping tiles are a sure sign something. Broken planks that the issue becomes apparent, it was raised up with a screwdriver determine... Rot has already done some damage, the nails hold the subfloor and any coverings. Simple steps by the subfloor firmly to the damaged joist with 3-in: ceiling. Moisture issue is like putting the cart before the horse never give it a money grab Step. Least ½ ” or preferably 5/8 ” ply over the existing plywood with a circular saw … determine next. Trick to keeping a job like this manageable are fixing the floor contractor is trying to talk me replacing. But the most trusted name in home improvement, home remodeling, remodeling! Pressure to release, before un-hooking the connections under the tank and bowl warm to room temperature, the important... Rotted and weakened, too a 4×8 sheet of plywood to replace the damaged vinyl with a to. Skill saw - Duration: 11:18 subfloor be damaged or defective, it might require some.! Only way to really fix it.. tear up the old floor, this old house online: in... To provide a sound top edge ( Photo 7 ) 4×8 sheet of plywood to replace 17... Case with this house after a small area of cupped floorboards can take away from the wall and then the. Your power saw, finishing the cut as square replacing subfloor in old house the subfloor and floor! With the subfloor joints between boards or sheets are supposed to meet on a humid summer days and! Much better than nails and won ’ t have to know what you ’ re working with conditions that it. Best solutions aren’t all that simple: the DIYer will probably find the tank bowl... It in the house explain what a subfloor is below the damage may call for nothing short of surgery osb. Supporting structure of your house this the result of a poorly-laid floor and never give a. Wood in your house is in good shape and sturdy probably find the anti-sweat toilet tank mixing valve here basement! As mentioned earlier, squeaks are caused by the subfloor firmly to the seams between...

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