Lets see what they say. He tiled over plywood floor in a small bathroom and within 2 weeks, the grout starting coming out and tiles were popping like crazy. Join Yahoo Answers and get 100 points today. If you have any access to the floor below, look for the APA stamp and tell us everything it says. Plywood allows for a much better build-up with lower undulations in the subfloor. you can do that however i would use 5/8s to make sure the the plywood does not sag under the voids. Thoroughly scrape, sweep, and vacuum the entire surface and strip any wax from the existing vinyl. One is the smoothness of the subfloor. We ripped everything out, had hardibacker put down and re-tiled with new tile too (what an expensive lesson that was!) It is fastened to the subfloor and sits below the finished floor, providing a suitable base that is as smooth and flat as possible. It's what makes a pile of boards and materials into a solid structure. The second problem is at the seams of the floor. However, in my opinion I don't think 1/4 plywood is going to give you much strength or support. I have bought another flip house. The bottom part would be kids game room and insulate the metal walls up to the 9 ft ceiling and insulate between the ceiling floor joist and the floor of the storage space and install can lights. ie. We used four sanded 5-ply 4'x8' 1/2" plywood sheets for our subfloor. The longest run between the pipes along the wall is 14 ft 9 inches (there is a roll up door between those 2 pieces of pipe). [ATTACH]63226[/ATTACH] It's very common to see 1/2 sub flooring in older homes, makes no since to do it that way, but it is what it is. The deflection in the truss joists is another matter, and adding weight will compound that problem. I would like to take half inch plywood and cover the whole floor in over to level them for carpet better and the old smell of the floor I cannot get up.I will tile the kitchen and bath. My understanding is that waferboard was the forerunner to OSB. View our Privacy Policy here. Deal with a Delaminated Subfloor. My Way Carpet - How to install 1/4 in plywood over subfloor? Any other suggestions on the build are appreciated. Having one side sanded makes for a nice flat surface for you to install your actual flooring. I wanted to know IF it was firmly screwed/nailed throughout. In most situations, the easiest way to firm up the floor is to install a layer of 1/4" plywood over the subfloor (nailed or screwed and glued) in such a way that the new plywood seams do not lay over the old seams. [ATTACH]63227[/ATTACH], http://tinytimbers.com/pdf/nwfa-install-guidelines.pdf, http://osbguide.tecotested.com/pdfs/en/tb103.pdf, PC5010 doesn't detect zone faults in expansion module PC5108, Question on switching 20/40 breaker for 60 breaker, GFI nuisance tripping with fluorescent lights. For vinyl sheeting or tiles, simply apply 1/4-in. Everybody has really good points, but I would definitely put hardibacker on the floors you will tile. Close. Also, how do I attach those 2x10's to the pipe. I have a metal barn with a room that has 4 1/2 inch vertical metal pipe along the walls (secured in the concrete slab and attach at the top to the roof I beams) spaced different lengths apart. This plywood underlayment provides the base platform for the flooring finish material. I currently have particle board over 1" -1 1/4" car plank--which will be removed. Walk the floor to look for squeaks, and run some deck screws anywhere you hear one. Daily rental. CDX plywood is created using C- and D-grade laminates on the outside of the plywood. Miss the joists. Flooring underlayment comes in a variety of different forms, ranging from 1/4-inch plywood to cement board to carpet padding or foam material. Hi, As was mentioned in this thread, I am planning to install 3/8" plywood over my 5/8" OSB subfloor prior to nailing 3/4" solid maple. 1/2" would probably have swollen up to be 5/8" thick by now. 1/4" plywood does not add structural integrity to a floor application and does not have the nail holding capacity. Plywood and the flooring to which it is attached must be at least 1 1/8 inch thick to support the weight of thinset and tiles. Adhesive will help you here, as the subfloor plywood will have voids in … Don't use wallboard patching materials because they may not be hard enough. Why the aren't uniformed I don't know. About the only time you add 1/4" is for the application of sheet vinyl, etc. Typically, you use 3/4-inch plywood, which has a tongue-and-groove, referred to … Add 1/2" plywood, then the flooring and deal with a 1/4" transition. plywood … I'm no expert in this type of thing. Underlayment for sheet vinyl: (1/4 inch Luan Plywood Installation) Luan Plywood : When you install luan as a subfloor for sheet vinyl, ensure that the luan has been secured so there is no movement. problems contact webmaster@doityourself.com. Do not use any adhesive beneath SurePly ® plywood … I have not seen a lot of 5/8" OSB or waferboard, and question why it was used rather than 3/4". Squeaky Subfloor. If you have a floor register remove it and see if you can measure it there. The drywall screws is what we were told to do back in the early 1980's. Also how far apart should my screws be when installing the plywood. The floor joist are good and strait looking under the house. Will get that as soon as I can. submitted to our "DoItYourself.com Community Forums". 2x10 sawmill oak is the floor joists on 2ft center. For many years, the standard option was lauan plywood, also called Philippine mahogany or luan plywood, which is made with an inexpensive tropical hardwood, and therein lies its problem. There simply is too much movement on a wood floor. There are two potential problems in installing self-stick tiles over a subfloor. As mentioned by others, countersink screws and/or set nails below surface then fill with wood putty and sand smooth. Structural SubFloor Preparation. Can I do this or will it cause the under subfloor to rot or any other problem. By logging into your account, you agree to our. 2 months ago. This 4x8 sheet of Sumauma plywood is perfect for underlayment, paneling, millwork, furniture, shelving and cabinetry. • Glue-down subfloor: 5/8 -inch plywood panels are glued in a staggered joint pattern directly to the slab. Even the pattern of a textured sheet vinyl or linoleum floor will appear through the self-stick tile! Hope this helps. It is very versatile. Here are the National Wood Flooring Association guidelines. I would still add 1/2" to it. 134 square feet: $79.10: $91.01 : Unused Minimum Labor To be blunt, the floor should be absolutely smooth! You can sign in to vote the answer. We listened to the "experts" of the day, perhaps the wrong experts but we did listen!! This will bring my subfloor up past the recommended thickness since the OSB itself falls 1/8" short. The uncoupling membrane is adhered to the surface being tiled using a layer of thinset adhesive applied with a 1/4-inch V-notch trowel. Thanks for all the input guys. Adding an additional layer of plywood can create other problems with adjoining floor heights. Stagger stagger. I am in the process of replacing old, improperly installed 3/4" plywood subflooring (SF) with new 3/4" T&G Exposure 1. Two avenues: leave the underlayment off and deal with a 1/4" transition. ... A four-foot-by-eight-foot sheet of OSB subflooring costs $18 to $22 and the same size sheet of plywood subflooring costs $20 to $24. This type of plywood, therefore, should ideally be used as subfloor … Many wood floor manufacturers don't mention waferboard in their installation requirements and cite 3/4" OSB or plywood minimums. Now if you are only talking about a imperfections or nail-heads, these can be easily repaired by patching with a quality wood filler or floor leveling compound. Still have questions? Will adding a 1/4 inch layer of plywood resolve the issue ? Basement windows have condensation after insulating and drywalling basement. Once the AmDry insulated subfloor panels are installed, you can apply any type of flooring like carpet, hardwood, vinyl, laminate, tile or stone. These substances are rather rough and full of many imperfections. Basic instructions for installing tile over cement in garage. I believe you have 1/2", but stand corrected if not. More plywood sheets are nailed down, staggering seams for a stronger fit. A beautiful floor starts with a stable subfloor. A new layer of 5/8-inch or 3/4-inch tongue-and-groove plywood subflooring is like adding a new subfloor over the old to create a stiffer, flatter surface for any type of finished flooring. The nail or screw heads should be "set" below the surface of the floor and the holes filled. woodworking. Carpet and hardwood mount directly to the OSB with tack stripping or nails. Particle board would not be a viable subflooring due to its propensity for swelling when moisture is present. Why? [ATTACH]63228[/ATTACH] The five plys make it stronger than typical 3-ply sheets at this thickness. I have 3/4 plywood on the floor now, for my bamboo floor but I've read in some ... First thing let me apologize for the long post I'm not moving or adding a toilet, I am just redoing the floor around an existing one. The engineered flooring will be 1/4" shy of the height of the hardwood in the other rooms, so I'd like to make up that difference underneath. I agree with most but I recommend installing hardibacker in areas you are planning to tile instead of plywood or particle board. Plywood is available in many thicknesses (1/8”, 1/4”, 11/32”, 15/32”, 19/32”, 23/32” and 1 1/8”). This will allow for the laminate to expand and contract as normal. Your subflooring is firmly screwed/nailed to the joists at present. Build up from the lowest elevation, using the products that allow for enough incremental elevation gain to get to within flatness tolerance. Will 2x10's be adequate to run around the walls attached to the pipe ( longest run between pipe 14ft 9 inches) then attach 2x10's running across the room every 16 inches on center to those 2x10's attached to the pipe. Is it 16" on center, 19.2 or 24"? "waferboard" is a viable predecessor to OSB. 2. But to reiterate the other comments, 1/4" gives no structural strength especially to particleboard. Should I use 1/2" or 5/8" plywood as a subfloor over my car plank. I think the pro was wise to suggest the additional plywood, since he is well aware of the problems associated with poor subfloor preparation. The tongue and groove floor is 1 inch oak with no sags or humps.A little wave in some areas and settlement over the years. If there is any "flexing" or movement at the seams, the tiles will eventually crack across these seams. Hi, I'm in the middle of finishing a basement and my wife asked if I could open up the stairwell to the basement to match the floor above it. This past Saturday the crew here at One Project Closer spent the day with Habitat for Humanity Baltimore, rebuilding a house in the Sandtown area of Baltimore City, Maryland. The plywood is thin, cutting down on our overall weight. Plywood is not enough. • If the subfloor is not acceptable, it can often be overlaid with 1/2 -inch plywood •3/4" thick Solid wood flooring must be installed across the subfloor … Minimum 3/4" OSB or 5/8" plywood for nail down applications. In construction, builders apply plywood underlayment to the floor framing of a house as the surface for the subfloor. Difference between oriented strand board and water board in a nut shell. When you build, you always stagger. IMO it's more likely to be 5/8 than 1/2. This one was built in 1950s. An organic, non-toxic alternative to Sterilite storage totes? Subfloor Installation Equipment Allowance Job related costs of specialty equipment used for job quality and efficiency, including: Pneumatic framing nailer, 12" miter saw and 3 1/4" electric planer. My house was built in 1985 and they used 5/8" "waferboard" as the subfloor. The reason is because any irregularities.. lumps, bumps, seams, nail holes, etc... in the subfloor surface will be transferred through to the tiles over time. Where's Joel when you need him?? DoItYourself.com®, founded in 1995, is the leading independent Resultant finished height (5/8" + 1/4") does not equate the same strength as a solid piece of material at the stated thickness. How to know if there are studs in 2" thick walls or what kind of wall it is for mount a TV on it? The second layer will need to be independent from the bottom layer. As with plywood subfloors, if there is movement or squeaks, refasten the subfloor to the joists and set protruding fasteners into the subfloor. I agree with everyone else, but would add as a suggestion that you use exterior grade particle board instead of plywood, since it has an extremely smooth surface. XSleeper, the joists are 16" oc. What size and how many. Hi, Since the old floor was terribly squeaky & had mucho "soft spots" (there was no underlayment), I will also be adding a 3/4" plywood underlayment (UL) prior to carpet. This may not be true in the case of a do-it-yourselfer such as yourself, since you are looking to save money, not time! I'm not wanting to remove the whole wall, just the 3 middle studs, and adding back one closer to the foundation so the wall will be flush. All information is provided "AS IS." What's the problem you're trying to remedy? home improvement and repair website. 1 Place a sheet of 3/4-inch plywood on a set of sawhorses. It typically comes in 4 x 8-foot sheets. Doing a complete kitchen remodel that includes a new linoleum floor. We welcome your comments and Screws not working! I attached an image of what is directly above the basement stairs (which is what I would be attempting to match in some form). The system is designed for use on all of the most commonly used subfloor materials—plywood, OSB, concrete and gypsum-based screed. Let me answer the questions that came up: Have you measured this OSB? What people seemed to be describing in this thread is the subfloor requirements for tiling a floor. Questions of a Do It Yourself nature should be 2x10 sawmill oak is the floor joists on 2ft center. The second method is to loose-lay one layer of 3/4 -inch plywood cut into 16-inch planks perpendicularly or diagonally to the direction of the flooring. This one was built in 1950s. Wafer board is randomly aligned wood flakes - Oriented Strand Board are the same flakes "Oriented" for stregth or specifically aligned so as to make a stronger product. my old sub-floor in the second floor bedroom consists of 5 planks. suggestions. These panels have 1995-2018 MH Sub I, LLC dba Internet Brands. How do you think about the answers? The flange sits an inch or two above the subfloor, and it sat a little bit above the old finished floor. Additionally as mentioned, drywall screws are not rated for flooring application. All rights reserved. The other pipes are spaced 11ft or less. Thanks MIke mek@duo-county.com. OSB is the most common type of plywood subfloor. Once this step has been completed, you'll need a foam underlayment. Plan the layout of the plywood sheets so the long dimension of the plywood runs perpendicular to the floor joists. I will be demo-ing a tiled bathroom floor. The floor joist are good and strait looking under the house. I didn't think it would be a problem till I looked at the wall and I'm now unsure. another layer of plywood, glued and screwed on a six inch grid. to this site, and use it for non-commercial use subject to our terms of use. Lastly, are dichromate (yellow zinc-ish) screws … I know this from experience, and I had a so-called professional tiler do the job. 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In most situations, the easiest way to firm up the floor is to install a layer of 1/4" plywood over the subfloor (nailed or screwed and glued) in such a way that the new plywood seams do not lay over the old seams. Improper spacing. It was never fastened to the mudbed, it has always been fastened to the subfloor. I really meant that as a question, but it didn't turn out that way. and we haven't had any problems at all. You may freely link u/TheFakeSteveWilson. You want to choose fasteners that will not penetrate the bottom of the subfloor. I suspect the experts here will tell you either remove existing floor and use 3/4 ply or add 1/2 to 3/4 to existing floor. Only exterior-approved plywood will support the weight; interior plywood and particleboard do not have the same strength and will buckle under the tiles. Install SurePly ® plywood underlayment over a clean, dry, level, original sound structural subfloor, or existing floor. I am trying to find a stamp I can read. The flange is already there, secured to the plywood subfloor. Re: attaching 1/2" plywood to existing subfloor Mike: A properly reiniforced mud bed, or light weight concrete, should bridge the 19" centers and take the deflection out of the plywood. Particle board is a failure for which the inventor should have been sent off to a remote island. It is for holding power of the stapes or cleats. You would have to be a real idiot to put 1/2" on a floor. If it is 5/8", so be it. We're installing an engineered wood flooring in a room that already has a plywood subfloor. The total room size is 33ft x 12 1/2ft with the ceiling 15ft in the center and gradually sloping downward in both directions. OSB provides a reliable, sturdy foundation for squeak-free, straight floor systems—provided a few simple installation best practices are followed. Bolt and nut? Particleboard is not stable enough as it will not have the holding power needed and any water event and it swells and turns to dust. I know it doesn't make sense, but they will move, ever so slightly and having them both fastened to the joists will keep that movement from happening. Posted by. I would install an additional 1/2" on top of what you have and not screw it to the joists, nor glue it down. I believe everything everyone has said czizzi and we don't shoot messengers or most people, for that matter, up here. Be sure to break the sheets over joists for the best results, and use Liquid Nails, PL400, or some other mastic adhesive to avoid new squeaks. It is important to note the height of the toilet flange after installing the plywood to maintain the proper height for the wax ring seal. We did this by simply starting with a 1/2 sheet of plywood on the first row, followed by a full sheet of plywood on the next row. The stapler saves a lot of time. IF you decide to do this, bear in mind that it is only for spacing and will not add any strength to the subflooring. edee_em, could you tell us your joist spacing? Sand surface smooth, vacuum and damp-clean to remove all dust before tile installation. Will adding a 1/4 inch layer of plywood resolve the issue ? This gives you a hard, smooth floor solving this and also solves the aforementioned "smoothness" problem. Consumables extra. My original thought was to use 1/4… But I want to know the correct answer to this also. When a person dies of kovid-19 at home does the virus stick to their furniture, bedding, etc or is it safe tp move their things? He also knows that, time wise (since his time is money), it could very well take longer to repair a bad floor than to just cover it with plywood. That's perfectly acceptable. Website operating What I'm wanting to do is build a ceiling 9ft tall across the whole room with a staircase and use the top part for storage. Shop undefined Underlayment 1/4-in Common Sumauma Plywood Underlayment, Application as 4 x 8 in the Plywood department at Lowe's.com. Here are nine common subfloor installation mistakes and how to prevent them: 1. Get your answers by asking now. The subfloor is the decking installed on top of flooring joists; the finished floor is then installed on top of the subfloor. Most plywood underlayment is about 1/4 inch thick and has square edges and a smooth, knot-free top face. I have bought another flip house. This is true of vinyl tile installation over any surface. The panels should be staggered every 2 feet and spaced 1/8 inch between ends.

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