"In new construction, the best subfloor for wood flooring is nailed and glued 3/4 inch T& G plywood, with the finished flooring installed perpendicular to the joists if possible. Thanks for the info. DoItYourself.com®, founded in 1995, is the leading independent Sweep the subflooring clean of all debris. It’s not uncommon for flooring to have a little … I have a second story floor that was carpet over plywood subfloor. The tongue and groove edge is more commonly used because the square edged plywood requires underlayment and blocking between the joists. It strengthens the floor, removes bounce, and gives the tile a better substrate to stick to. Should this be the case, a homeowner might need to peel back the layers of flooring and get to work. How to Install a Plywood Subfloor 3/4 Inch Plywood Subfloor Preparation: Joist Installation. Should that subfloor begin to warp or twist (especially common in softwood subfloors), nails will begin to work themselves loose from the joists and those squeaks will begin to speak up. More plywood sheets are nailed down, staggering seams for a stronger fit. Place the new sheets covering over 3 of the seams in the existing floor which will stiffen your floor. Screw the subfloor material down to the new joist, and say goodbye to that bounce and squeak. Sometimes a joist needs to be longer than one piece of timber. Cupping occurs when hardwood floorboards begin to curl along the length of the board, somewhat like a taco shell but less pronounced. That’s basically how to install plywood underlayment. C-D plywood is made from thin sheets of veneer that are laminated and then glued together forming a 4 foot by 8 foot sheet of plywood. - Installation method: Cut the plywood panels to 2' x 8', or 4' x 4' sections. Often, it’s so typical that it goes completely unnoticed. Drive some screws through the joists and into the ends of the new board you’re installing. Screws are the best to secure the plywood with, and since a premium glue is used, there only needs to be enough set to draw the plywood to the joists. All information is provided "AS IS." We left approximately 1/16″ inch of space between each plywood sheet, and between the plywood and the van walls. Question: “How do you install solid wood flooring over a wood subfloor?” OK. It’s not uncommon for flooring to have a little squeak to it. A subfloor is part of the frame of the structure. How to Install a Van Subfloor. Copyright© Add more wood screws, if needed, to secure them. These expansion gaps are necessary as the plywood will naturally expand and contract. There’s also a chance that your subfloor suffered water damage and has since dried itself out. Plywood Substrate Alternatives . Most types of flooring including wood, floating wood, laminate and carpet can be installed directly over C-D plywood. Use a ¾â€ spacer between the plywood and the wall and a 1/8” spacer between panels. Common Applications for Basic Types of P... Common Applications for Basic Types of Plywood. You agree that BobVila.com may process your data in the manner described by our Privacy Policy. By the time that the issue becomes apparent, it might be too late for your subfloor. Tom Scalisi, Bob Vila, 11 Decorative Pillow Trends to Expect in 2021, Do-Good Adventures: 9 Exciting Summer Volunteer Opportunities, 7 "Delicious" Renovation Tips from HGTV's Kitchen Cousins, 10 Apps and Tools That Will Help You Save Money, 8 Ways to Make It Look Like You’re Home When You’re Not. to this site, and use it for non-commercial use subject to our terms of use. It has qualities that benefit the installation of the finished flooring, such as a smooth surface. A subfloor is the structural sheathing that spans the floor joists. The floor of any building or structure is its base and one of the most important parts, so when preparing to lay a plywood subfloor there are several things to keep in mind. With what you took out I would probably do 1/2" ulay plywood. A level and sturdy subfloor will also help to prevent the finished floor from moving or creaking. We welcome your comments and Before you install your plywood subfloor, first calculate the room’s square footage to find out how much flooring you’ll need to buy. Schluter Ditra is one popular brand of a membrane. Regardless of the reason, cracking and popping tiles are a sign that something’s going on with the subfloor beneath. Consider an Uncoupling Membrane. Website operating How To Install Plywood For Peel and Stick Vinyl Floor? If the subfloor is wood plank, orient the plywood grain at a 90-degree angle to the grain of the planks. Loosened nails. When subfloors are installed, any end-to-end joints between boards or sheets are supposed to meet on top of a floor joist. 1995-2018 MH Sub I, LLC dba Internet Brands. Oneprojectcloser – 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. When measuring the area, you should measure all the way to the wall plates in the room. Cement backerboard is made for tiling. Place a sheet of 3/4-inch plywood with the sanded side facing upwards into one corner of the … The C represents the grade of veneer on the front of the board and the D represents the grade of veneer on the back of the board. Lower the piece of subfloor you just cut into the opening, screwing it into the joists below. To prepare the right plywood for peel and stick PVC floor, follow the below steps to install the plywood: 1. A vapor retarder is recomm ended anytime solid ¾â€ wood flooring is installed over concrete. Glue and screw tongue and grove subflooring with manufacturer recommended spacing. For example, if you install resilient tiles or sheet flooring over a subfloor, any bumps, dips, or voids in the subfloor may be evident in the finished flooring. Water damage. Subfloor Screw Sizes. Prepping a plywood subfloor for hardwood or laminate flooring. Screw the cement board into the plywood about every 6 inches (Image 2). To install a floated subfloor system, first place a layer of plywood subfloor panels with the edges parallel to the wall. Assess the damage and cut around it, then remove the damaged subfloor. It's what makes a pile of boards and materials into a solid structure. While you can install these types of flooring materials directly on an oriented strandboard or plywood subfloor, if yours is not in perfect condition, it is often best to simply install underlayment made from 1/4-inch-thick plywood. Mix your thinset according to the instructions on the bag. Once you’ve installed a vapor retarder, install your subfloor. OSB is a composite of glue and strips of scrap wood, in sheets 4 feet wide and 8 or 12 feet long. How to Install Subfloor Panels. If you use adhesive for the underlayment, you can get away with fasteners every 8" using ring shanked nails. It is hard both on your back and your knees. LePage PL Premium in Canada and Loctite PL Premium in the US are basically the same stuff. In addition, you’ll find that steel screws come in a number of different lengths. If the subfloor is plywood, orient the underlayment in the opposite orientation of the first layer of plywood. By Tom Scalisi and Bob Vila. Quantity includes typical waste overage, material for repair and local delivery. 2. Often the subfloor consists of plywood that is nailed or screwed to the construction floor. Once in place alongside the broken joist, glue and screw the new joist to the old broken one. Utilize a dehumidifier for a few days to draw out the rest of the moisture. Also, keep the cut as square to the joists as possible—this will save you a headache in the next step. On a concrete subfloor, you could choose to orient the plywood in whatever direction works best for you. In most cases 4-by-8-foot sheets of particle board or plywood must be installed in preparation for the vinyl floor install. 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. Even a small area of cupped floorboards can take away from the pristine appearance. Depending on when a home was built, a subfloor could be made from softwood boards like pine or fir, plywood, or OSB (oriented strand board). Even some of the telltale signs are easy to ignore. 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. Find licensed flooring experts in your area and get free, no-commitment estimates for your project. 134 square feet: $79.10: $91.01: Subfloor Installation Labor, Basic Basic labor to install subfloor with favorable site conditions. I have done this. Step 1 Cut the end of the silicone caulk nozzle at a 45 degree angle using a utility knife. The safest, most prudent course is to install tile on top of a cement backerboard such as Durock, Wonderboard, or HardieBacker. I use the term "underlayment" to mean a layer above the subfloor, but not the finished floor. We shared the day with a dozen volunteers, working primarily on structural components of the house, including installing floor joists, installing a 3/4 inch plywood […] Measure the opening and cut a piece of OSB or plywood of the same thickness and dimensions as the subfloor you removed. In the case of a dry subfloor with cracking tiles, it’s almost certain that you’ll need to remove the tile to come to a resolution. If this is for a tile floor, this is the point that you’ll want to screw down the. Under ideal circumstances, the nails hold the subfloor firmly to the joists, avoiding any squeaking issues. Is there evidence of mold? It requires knowledge, skill, and a LOT of hard work. Replace any nails with screws, since nails that popped up will loosen again. This provides a solid, level work surface to affix the flooring and adds stability to prevent the floor from creaking or moving. The moisture issue probably isn’t being caused by the subfloor but if the hardwood flooring above is cupping, it’s a safe bet that the subfloor is suffering as well. Adhesive will help you here, as the subfloor plywood will have voids in spots that will not hold a fastener. Is this the result of a poorly-laid floor and the framers missing the joists when they laid down the sheathing? To avoid nail pops, pullouts, and shiners (nails that barely hit the joist), all of … Is this a water issue and if so, where is it coming from? Also, it is twice the cost of regular subfloor adhesive, but you can actually use less. Lift one sheet (leave the rest in place) and spread thinset directly onto the subfloor filling the area left by the sheet (use a 1/4" x 1/4" notch trowel). Prepping for a subfloor installation happens long before you are actually... Steps to Install … Should that joint be off by only an inch, over time foot traffic will cause the end of the sheet to sink. 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. Stagger stagger. This provides a solid surface under the tile that prevents flexing that could lead to cracking. Subflooring can last a very long time. Copyright © 2020 Acton Media Inc. All rights reserved. When laying cut pieces of plywood it is best to place the cut sides against the wall where possible. 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. All houses need subfloors. Use nominal 5/8” (19/32”, 15.1mm) CD Exposure 1 Plywood subfloor panels, (Exposure 1), 4' x 8' sheets. Before you can install floor tile, there must be a viable subfloor that the tiles can adhere to. A subfloor is installed on top of a structure's construction floor and provides a flat, level surface for finish flooring such as tile or linoleum. If you have water damage, the cause of the water has to be resolved before taking any steps toward fixing the floor. The subfloor exists for two reasons, to add stability to the floor system and to serve as a base for the finished floor. OSB is fast to install and less expensive than real wood or plywood, making it the go-to material for modern subfloors. First, cut the plywood down to the width of the bus with a circular saw. home improvement and repair website. Install Plywood Sub-Flooring Before you lay new wood flooring, vinyl tile, carpet or other floor materials, you'll want a smooth, even sub-flooring installed over the old floor. This will work regardless of room temperture, and will lock out moisture if that is a concern of yours as well. Underneath the hardwood, laminate, tile, or carpet lies the subfloor, and it’s a component that only gets attention during a full-scale renovation or a full-blown problem. Small Log Homes Floor Plans . Use a polymer-modified thin-set – a type of mortar – to attach the backer board to the subfloor. - Installation method: Cut the plywood panels to 2' x 8', or 4' x 4' sections. These are pretty serious matters to handle and without proper preparation, you should not walk ahead. Glue-Down Subfloor System - Materials. If there was a leaking drain in the wall or a leaky sink nearby, or if there was a section of the roof that was leaking during the last storm, your subfloor might’ve taken on some water, and it’s time to investigate the extent of the damage. Fix the creaking first, then ulay and use 1/4" crown staples. For the 1/2" underlayment, ideally, you want to screw every 6" all across the panel. When you attach the flooring, use staples with a quarter crown. Make sure to remove stray nails or staples. When leveling floors made of wood, you’ll need to sand down any high spots. Using some construction adhesive like Loctite PL Premium (. The appearance of a floor is determined by the quality of subflooring, and plywood underlayment is often the blessing or curse of an attractive room. Screws hold much better than nails and won’t start squeaking. All rights reserved. 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. When laying a plywood subfloor you are raising the height of the original floor. Just keep in mind that the subfloor could cause some doors not to open or close. we are planning to install a 1/2"-3/4" solid hardwood floor, and are trying to determine to correct way to do this with our existing 1/2" subfloor. Installing ceramic floor tile to a plywood sub-floor has unique challenges beyond that of installation on a concrete floor. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Typically, you would use plywood to build a subfloor and then install a flooring product, such as carpet or linoleum on top of the plywood. How long has the floor been getting wet? Continue this pattern across the subfloor. We cut the 4×8 sheets of ½ inch plywood to size using a circular saw. The plywood is thin, cutting down on our overall weight. Stagger stagger. Step 2: Measure the Panels. Terms of the Trade: What Is a Tongue and Groove Joint? These nails work themselves loose as a subfloor ages and sinks, despite retaining its structural integrity. 5.3 - Screw each sleeper at least 2" into the concrete slab. Cutting and Installing Plywood Subfloor. Subflooring can last a very long time. Layout, fabricate and install subfloor over existing joists. hi! Updated on September 29th, 2020. Hey guys. Plywood underlayment is typically needed when a floor material must have a very smooth, flat surface. If there is no gap, then the plywood will bend and buckle when it expands. Use a ¾â€ spacer between the plywood and the wall and a 1/8” spacer between panels. Once the subfloor is thoroughly cleaned, the underlayment panels are installed one at a time directly over the subfloor. If you have the ability, the easiest thing to do is to get a look at your subfloor from underneath. To create a rock-solid substrate for the tile, cover the subfloor with cement backerboard.Begin by mixing up a batch of … Here are five signs it’s time to replace a subfloor. Plan how you will lay the plywood before beginning the project. To improve the strength of the subfloor, these joins should be staggered. Fixing the floor before fixing the moisture issue is like putting the cart before the horse. First, we grabbed some PL Premium construction adhesive to glue down our rigid board insulation. Do this by multiplying the room’s length by its width. A quick inspection of your subfloor might reveal all there is to know about your problem, and the least invasive method is usually best. we are planning to install a 1/2"-3/4" solid hardwood floor, and are trying to determine to correct way to do this with our existing 1/2" subfloor. The installation process starts with storing the underlayment panels in the room where they will be installed for at least 72 hours. Resolving water damage is dependent on a lot of factors, but the most important of those factors is time. Install the sheets one at a time. View our Privacy Policy here. Vinyl flooring is usually not installed directly over the subfloor in residential applications. The underlayment must rest flat over the entire floor. To save on headroom, we chose 3/8 inch plywood. If a floor begins to sink between floor joists, it’s a sure sign that there is an issue. Now that the metal floor pan is clean and the subfloor insulation and plywood subfloor materials are all picked out, it’s time to install the subfloor system. When preparing to purchase the plywood of your choice, you will need to estimate how much wood to purchase. This is also a good time to screw as much of the original subfloor down as you can. To remedy this situation, cut a piece of joist material (2×8, 2×10, or 2×12 depending on the circumstances) to fit crosswise between the two joists under the soft flooring. Using the original sub-floor nails as a guide, mark the floor joist locations on the wall to know … If there’s been water sitting in between the finished flooring and subfloor, there’s a good chance there’s some damage. The five plys make it stronger than typical 3-ply sheets at this thickness. The 4 foot by 8 foot sheets of plywood are easy to install and cover a large area. You install it perpendicular to your other floor. Be sure to know about the process clearly before trying flooring installations. Replace any nails with screws, since nails that popped up will loosen again. 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. Underlayments are not always necessary. While moisture can certainly be the suspect, it’s also common to find that the wrong material was used for the subfloor. Subfloor Cost Non-discounted retail pricing for: 23/32" tongue and groove OSB subfloor. I need your help. November 18, 2018 by Gwen 5 Comments. Standard 4-by-8 plywood sheets will break evenly on all three of the joist configurations. Debris left on the subfloor can cause problems with the underlayment down the road, such as the void which could allow noticeable movement, floor squeaks or cause fasteners to poke through. After you have decided where to begin, it is best to give yourself a diagram to follow. 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. It’s almost always completely hidden under some type of finished-flooring material. In addition, you should sweep and clean the base floor to remove and dust or dirt before laying the subfloor. Install the short end of the joist on one side for the first joist, then swap sides for the second joist. we are renovating a 1970 built home and have taken out the existing carpet and linoleum, along with the 5/8" particle board subfloor, leaving only a 1/2" plywood layer, not t&g, over joists 16" oc. Vinyl flooring is usually not installed directly over the subfloor in residential applications. One of the big considerations when installing different types of flooring in the home is getting the finished elevations to match. More plywood sheets are nailed down, staggering seams for a stronger fit. Plywood comes with two edge options, the square edge and the tongue and groove edge. However, should a subfloor be damaged or defective, it may only last 20 to 30 years. Because you can install sheet vinyl over existing vinyl, it offers the option of changing design without breaking the bank. Plywood is available in many thicknesses (1/8”, 1/4”, 11/32”, 15/32”, 19/32”, 23/32” and 1 1/8”). Issues with a subfloor become far more apparent when walking through a living room feels more like a stroll through rolling hills. Installation starts with one sheet of plywood, placed perpendicular to the joists in one corner. submitted to our "DoItYourself.com Community Forums". I'm getting ready to install new luxury vinyl flooring. If that’s the case, the subfloor might be fine as far as mold and moisture are concerned but still feel a little soft. we are renovating a 1970 built home and have taken out the existing carpet and linoleum, along with the 5/8" particle board subfloor, leaving only a 1/2" plywood layer, not t&g, over joists 16" oc. Use subfloor adhesive, and screw 8" at edges, 12" in field. Start exposing the floor to fresh air by removing any rugs or furniture. So I am planning on installing 5" wide hardwood. Consider both load bearing capacity and deflective properties when selecting subfloor materials. Next, lay a second layer of plywood at a 45-degree angle to the first layer. The 4 foot by 8 foot sheets of plywood are easy to install and cover a large area. Also, don’t forget to wear proper safety equipment while … It's what makes a pile of boards and materials into a solid structure. Those squeaks could be calling for your attention. When you build, you always stagger. When backing the cut side against a wall is not an option, place the cut sides against an uncut side of another piece of plywood. Apply an adhesive approved for the installation of plywood, per the plywood manufacturer's recommendat ions. We managed to complete the install in one day, but be prepared to have to wait overnight for any adhesive to cure before moving to the next step. When laying a subfloor, the best place to begin is the largest area you can cover before you are required to make a cut in plywood. In most cases 4-by-8-foot sheets of particle board or plywood must be installed in preparation for the vinyl floor install. This acclimates the panels to minimize expansion/contraction issues after installation. Step 1: Prepare the Subfloor. Next, lay a second layer of plywood at a 45-degree angle to the first layer. 5.1 - Lay flat the pressure-treated 2" x 3"s around the entire perimeter of the room, maintaining a ½" expansion gap between each 2" x 3" and the walls. When laying cut pieces of plywood it is best to place the cut sides against the wall where possible. This means that for 7/16" underlayment and 23/32" subfloor, the longest fastener you can use is 1-1/8". Do this by multiplying the room’s length by its width. 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. When laying a plywood subfloor you are raising the height of the original floor. On the 3/4" subfloor, you have the right idea. How to Prepare a Subfloor for Terrazzo Tile. How to Install a Subfloor With Luann Plywood When installing luann, you can place the laminate directly over the luann plywood. When you’re installing an interior subfloor using 3/4-inch plywood, you’re going to want screws that are labeled #8, #10, or #12. It can be a challenge to maneuver a joist into place over a bearing wall on one side and a top plate on the other, so employ the help of a friend. If you do not waterproof the subfloor, moisture can make its way under the subfloor and cause mold growth or other damage. If the subfloor is plywood or particle board, start by screwing down any loose boards or plywood sheets. Mop up all the standing water. Cement board (a sheet of lightweight concrete and fiberglass mesh) should be laid over top of the subfloor for any tile project.