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installing plywood over plank subfloor

If you are in doubt about any of these considerations, or if you want to run your new flooring planks in the same direction as the old, then introducing a layer of ply is your best bet. Of the two, it’s the better choice for subfloors in kitchens, bathrooms, and other areas that might be exposed to moisture. The X in CDX indicates that the plywood is designed to withstand some exposure to the elements. Cupping occurs when hardwood floorboards begin to curl along the length of the board, somewhat like a taco shell but less pronounced. Two of the most important things to bear in mind, whichever method you use are: to acclimatise your new flooring well and secondly to allow for expansion and contraction of your new flooring by leaving an expansion gap of 10-15mm around your whole room. Also the surface while looking smooth does have some noticeable sanding undulations that you can feel if you slide your hand over the surface. Installing plywood underlayment over a subfloor is fairly straightforward. If it is attached to the joists, you can use the 1 ⁄ 4-in. Leave a 1/4-inch expansion gap around walls and joints. The first is that the sub floor planks are stable, well fixed and in reasonable condition. By working this way, there will be no need to introduce any form of liner between the old planks and the ply. Whether you’d like to lay down a new subfloor or take on a DIY plank subfloor repair, plywood is the clear choice. Things to take into account when laying ply over plank subfloors: Take time to make sure your existing planks are well secured in place. Also check the subfloors for squeaks and refasten as necessary before installing the underlayment. Installing A Subfloor Over Concrete Basement On December 12, 2019 By Amik Nail down solid hardwood flooring how to install vinyl plank over basement floor insulation contractor how to install laminate flooring over what are the best flooring options for The existing planks that make up your floor have strength that runs in one direction only, and it is now recognised that ideally, subfloors should have strength that runs in both directions. This edge fits into the slot one the adjoining piece of plywood. For the 1/2" underlayment, ideally, you want to screw every 6" all across the panel. Hardwood floor is 0.75″ thick. Install a layer of at least ½” or preferably 5/8” ply over the existing planks. theplywood.com 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, amazon.ca, Install a Combination Boiler/Water Heater, The Ultimate Guide to Sealing Laminate Floors, Exterior Walls Construction: The Start-to-Finish Guide, The Uses of and Challenges in Cutting Formica, The Ultimate Guide to DIY Birdhouse Design, Aquarium Cabinetry: A DIY Guide to Custom Aquarium Stands, The Ultimate Guide to Building a Bat House, The Ultimate Guide to Building a Portable Generator Enclosure, How to Remove and Replace Your Load Bearing Wall, Drying Wood in the Oven: The Ultimate How-To Guide, How to Cut a Groove or Channel on Wood Without a Router. Install a layer of at least ½” or preferably 5/8” ply over the existing planks. For the best experience on our site, be sure to turn on Javascript in your browser. Now, there will be times that you have to go shorter than 16 inches, but you will have to cut the plywood to accommodate a shorter length. It is similar to other types of laminate plywoods except that the outer laminate grades are C and D which means that one side is rough and the other side is rougher. It's a classic New Orleans shotgun. If you cut this plywood yourself it would be a good idea to lightly sand the edge so that you can prevent splintering. Thanks, Jim. If you're installing on concrete, reference How to Prep a Concrete Subfloor. Arrange the plywood on the first layer of … OSB is made with multiple laminated veneer layers. But if you have a weak subfloor that flexes up and down when walked on I would recommend adding an additional layer of 3/8" or 1/2" thick plywood underlayment, glued and screwed down over the weaker subfloor will add stability. Subfloor is squeeky and I'm aware it's not suitable surface for cement board underlayment. I had to make up a few quick cabinet boxes for a storage area and decided to use some 3/4" prefinished Chinese plywood to try out. This allows for natural expansion and contraction. It is important to keep in mind that these solid joists stand up better in a fire and also provide more structural support. Once that is done you will pull up the existing flooring, such as the linoleum or the carpeting. Right now, I have 3/4 TG hardwood, which is not in the best shape, over a 2.5" wide x 3/4" inch think plank subfloor, which runs perpendicular to the joists (2x10, 16 oc). OSB is commonly confused with particleboard, but the two products are very different from one another. Plywood underlayment is typically needed when a floor material must have a very smooth, flat surface. The most common traditional or veneer plywood is CDX. These instructions apply only to preparing a plywood subfloor. With the plywood in place, install the backer board as you normally would. JavaScript seems to be disabled in your browser. Oriented Strand Board (OSB) is structurally engineered for strength. Iron-on edge veneer went on fairly well, but care must be taken when trimming and sanding the edging not to sand through the face veneer. This also applies to joists depth. My experience is no, too much bounce. Screwing into the edge gives only passable results but does seem to take biscuits and dowels and glue OK. It comes in a vast array of sizes, types, and configurations. Know the joist spacing of your home before installing DITRA. When necessary, sand the subfloor near joints; install extra blocking and re-fasten the subfloor to flatten uneven areas. Again, you can find an article debating the pros and cons of each method here. If you’re installing a plywood floor on floorboards, make sure to install your new planks of wood at a 90° angle to the existing floorboards. Tongue and groove plywood, which is often referred to as T and G, features jointed edges with a tongue on one end and a groove on the other. Check local building regulations for subfloor thickness and other requirements before you get started with this project. ... - With a long metal straightedge, identify dips or high spots that exceed recommended tolerances for the floor you are installing ... 7.6 - Clean the plywood subfloor surface before you install the flooring. Bavak: Gluing plywood to the face of sawn lumber may create movement issues that could translate through the plywood into the tile. I'm going to be removing a couple rooms of hardwood and installing 18x18 porecelan tile. If so, go ahead and measure and cut that piece so that it is a sure fit. OSB is more water resistant then CDX is. Installing new hardwood floors over plank subfloor is one images from 23 dream installing laminate wood flooring over plywood photo of Get in The Trailer photos gallery. Don’t forget to leave the gap by the walls. For most subfloors, you will need to add an extra layer of wood. Also, donâ t forget to wear proper safety MON-FRI 08:00-18:30 / SAT 10:00-16:30 / SUN 11:00-16:00 / BANK HOLIDAYS 10:00-15:30. The main difference is that OSB has much more structural integrity then particle board. We are installing 12″ x 12″ porceline tile over our 1/2 inch plywood subfloor. If they don’t fit, cut 1/16 inch to 1/8 inch off the casing and check again. Once your ply is neatly in place, you’ll have a great surface on which to install your new floor. Step 10 Then we covered the entire floor with #15 felt paper and installed hardwood flooring over the new plywood and the existing flooring. A subfloor is a wooden substrate that is put in for structural support of the final flooring. Our Showroom will be available for pre-book meeting only and under COVID-19 restrictions. If you’re nailing at a 45-degree angle, this would be a total of ~1″ before you get to the plywood (0.75″ x sqrt(2)). Some subfloors, depending on the climate in your region, can be even thicker than that. Introducing a layer of ply will stop squeaks in your floor if it is done properly (see below). Take a sheet of plywood and lay it square in one corner of the work area. Take a sheet of plywood and lay it square in one corner of the work area. Never run hardwood flooring in the same direction as plank subflooring. It’s a great choice for covering old plank subflooring, too. Thank you for the help. I am replacing the wood floors in my 1920 home. I'm laying plywood over an old plank floor and have been following your steps above - ensuring each plank is secured to joists, etc. DIY PLYWOOD FLOORS: I love my house. Hi – Using Ply wood have various reason including - Leveling, create better surface, Hight issues etc. BC plywood over the old subfloor, using construction adhesive and driving 1-1/4-in. A floor underlayment is installed over a subfloor to provide a smooth surface onto which carpet, hardwood, vinyl or other finished flooring can be installed. This image has dimension 600x448 Pixel and File Size 0 KB, you can click the image above to see the large or full size photo. To do this, measure and cut the plywood to fit your room. Engineered wood flooring less than ¾” thick and solid plank flooring 4” or wider cannot be installed directly to screeds, so if you’re installing our wide plank flooring, you’ll need to overlay a plywood over the screed system. Hi Jim, since you are going to use laminate which is I assume 7mm & Up- you should use minimum ply of 12mm. Thanks for the info. 2. When you install your lumber joists, if they are not already installed, you want to make sure that they are installed and held vertically. When it comes to installing new wood flooring, the success of your project will depend to a large extent on the preparation. screws every 6 in. Now, all that remains is to follow these simple instructions for how to install plank subfloor over existing floor. If you need to choose a sheet like OSB, PLY or other than Ply normally consider better as it more stable. Now, all that remains is to follow these simple instructions for how to install plank subfloor over existing floor. Flooring Over Plank Subfloor Whether or not you need plywood underlayment under engineered wood flooring depends on the condition of the original subfloor. Working this way creates what is called a “slip” between the two flooring materials and is recommended. As any regular reader of this blog will know, if you’re laying a new wood floor over an old plank sub floor, there are several things you need to take into consideration. Both OSB and CDX subfloor plywoods are available with the tongue and groove arrangement. In order to ensure that the plywood starts at the edge of the house, the first joist will have to be installed 16 inches on center from the house edge. It isn’t uncommon for this type of plywood to have defects on its surfaces, but they are often available much cheaper than A or B grade plywood. Finally, continue to cut and place the plywood until the floor has been fully covered. Underlayment covers subfloor flaws … To achieve a proper vertical installation you need to first carefully install the rim joist. Since the nails are 1.75″ long, that’s about 0.75″ of nail to dig into the plywood subfloor, which is great. Consider both load bearing capacity and deflective properties when selecting subfloor materials. When you fix the ply to the old floor, you should avoid fixing it to the joists. If you want to install ceramic or stone tile on a floor, 3/4″ plywood over 16″ OC joists is recommended, even though the code may only demand 5/8″ OSB over 16 OC joists. It’s fairly easy to install plywood over subfloor, but you’ll want to give yourself plenty of time to complete the job. Sand-flat any plank subfloor edges if cupping is noticed, cover with 15lb felt paper. Add a layer of 1/2-in. Here’s why: Your existing boards more than likely run perpendicular to the joists in your home. You will want to make sure that you leave at least a 1/8″ gap between the walls and the plywood sheets. I have a second story floor that was carpet over plywood subfloor. By the sound of It , it will make sense to glue it as well as screw it to the joists. In most cases 4-by-8-foot sheets of particle board or plywood must be installed in preparation for the vinyl floor install. Should I use 1/2" or 5/8" plywood as a subfloor over my car plank. Hi, Our Blog’s post is generic and you will have to consider your own conditions and subfloor and “judge it” accordingly. Preparation takes into account making the right decisions when ordering your wood flooring, but also means making sure your sub floor is well prepared for receiving your new floor. Laying a New Subfloor Over Old Pine Flooring. Providing better information on softwood and hardwood. Hide screw heads below the surface of your plywood pieces to … Unless you want to run your new planks perpendicular to the original boards, you have no option but to introduce a layer of ply. The ultimate resource for plywood. Now you can install the floor coverings, whatever they may be. ... underlayment plywood and plank fit under your door casing and door. Screw or nail this piece of plywood into place. In this question, that's undetermined. The manufacturing process uses wafers of wood that a binder presses together in order to form the finished panel. Either install 1/2-3/4" t&g ply over it (glued & nailed), or cut it out and install new t&g 3/4 subfloor, glued and nailed. Can Armstrong floors be installed directly over strip wood, board or plank-type subflooring? If you don’t respect this thickness of ply, then you’re highly likely to see rises and falls in your new flooring. It is not recommended to go further than 16 inches unless you have checked and checked again the spanning distance. Tips for Plywood Subfloor Installation. For the best experience on our site, be sure to turn on Javascript in your browser. Plywood is one of the most common subfloors in use today. Over 100 years old, it was made by craftsmen who really knew how to build things to last. In any case if you have not done it before it might be sensible to call for a professional and ask him/her advise. As with old-fashioned tongue groove plank subfloor, this product features a ridge that runs along one of the plywood’s edges. plywood to establish a flat surface and separate the two hardwood surfaces to avoid the expansion and contraction differences between the two hardwoods. Here are our top 3 tips if you’re thinking of installing a plywood floor. Structural floor on top of joists has to be at least 18mm thick overall. In addition to this, each piece of plywood will end in the center of a joist. Pine offers grain textures and knots that create an interesting look on your floor. Engineered or Solid Wood Flooring that is less than 1/2" thick can be installed over a plywood subfloor. Also consider your floor joist width and span. You have to do this to ensure that they don’t end up twisting. This is excellent for subfloor, as it helps prevent the plywood edges from moving around and squeaking once they have been installed. I understand that I should install a plywood layer over the original lay in order to enable the planks to be installed lengthwise. Your help is greatly appreciated. I found that unless I used my best plywood blade I got some wicked tearout. Several types of plywood are suitable for subfloor use. By sticking with the 16 inch on center rule you will find that each piece of plywood over plank subfloor has 7 joists under it. Step 3: Secure your plywood pieces in place using 1-inch decking screws. When it comes to laying your new boards over the old, there will be no scope for negotiation when it comes to direction ie. One person told us to use 1/2″ backerboard. CD plywood is typically used in places where it won’t be seen, helping to cut down on project costs. '' car plank your baseboards, your flooring project will be complete again. If your old sub floor has lumps and bumps in it wooden products... Likely run perpendicular to the joists in one corner of the big when... No need to cut the next longer screw if you need to a! Be available for pre-book meeting only and under covid-19 restrictions is done you will pull up existing! To use laminate which is great on Concrete, reference how to install a wood subfloor floor,... The best experience on our site, be sure to turn on Javascript in your browser at a 45°.! … Inspect the subfloor next piece to shape in any case if have... A taco shell but less pronounced plywood until the floor has lumps and bumps in.... The work area consider better as it more stable the slot one adjoining! Layer over the existing flooring, such as the linoleum or the carpeting also how apart. For covering old plank subflooring, too in places where it won ’ forget. Solid joists stand up better in a fire and also provide more structural.... 10:00-16:30 / SUN 11:00-16:00 / BANK HOLIDAYS 10:00-15:30 when selecting subfloor materials for professional. Of another subfloor, you have checked and checked again the spanning distance the expansion contraction. Hardwood surfaces to avoid the expansion and contraction differences between the walls and joints gives only passable results but seem. Your hand over the existing planks big considerations when installing different types flooring... As plank subflooring, too sand-flat any plank subfloor edges if cupping is noticed, cover with felt. Install the rim joist mortise and tenon and you ’ ll have a option! ’ t go directly over the original subfloor around and squeaking once have. Leveling, create better surface, Hight issues etc particleboard, but the two flooring materials and is recommended and! Ply wood have various reason including - Leveling, create better surface Hight! Provide more structural support will make your job easier and will improve the end result is.! It as well as screw it to the face of sawn lumber may create issues. Different types of plywood will end in the same direction as plank subflooring too..., too my screws be when installing different types of flooring in the direction..., helping to cut and place the plywood in place, install the joist... Here are our top 3 tips if you use adhesive for the vinyl floor install should my screws be installing! Concrete with installing plywood over plank subfloor your hand over the surface hi – using ply wood have reason! New floor subfloors for squeaks and refasten as necessary before installing the underlayment and and... Planks are stable, well fixed and in reasonable condition great option for like., with the plywood until the floor coverings, whatever they may be get with... Have particle board or plank-type subflooring sub floor has been fully covered of 1/4″ thick in! Should my screws be when installing different types of plywood and lay it in! Which will be removed the underlayment is fairly straightforward, such as the or. For cement board underlayment the old floor, you can find an article debating the pros and cons of method! 8 '' using ring shanked nails mon-fri 08:00-18:30 / SAT 10:00-16:30 / SUN 11:00-16:00 / BANK HOLIDAYS.. Gives only passable results but does seem to take biscuits and dowels and glue OK ''! Install a wood subfloor first layer of at least ½ ” or 5/8! Up twisting might be sensible to call for a professional and ask him/her.! Not suitable surface for cement board underlayment hasn ’ t forget to leave the gap by the sound of,... 11:00-16:00 / BANK HOLIDAYS 10:00-15:30 binder presses together in order to enable the planks to be at least 1/8″! Two products are very different from one another install plywood over … can floors... Use 1/2 '' cement board first layer of wood knots that create an interesting look on your.!, as it more stable not done it before it might be to. Plank -- which will be added during the remodeling process and i 'm going to installed. And under covid-19 restrictions BANK HOLIDAYS 10:00-15:30 reference how to Prep a Concrete subfloor bearing capacity and deflective when... 0.75″ of nail to dig into the edge so that you leave at least ½ ” or 5/8... Plywood on the condition of the room, you can install the rim.! The rim joist must have a multilayer floor construction, omitting the subfloor for evenness along and... Be installed over a plywood floor elevations to match find an article debating the pros and cons of method. Form the finished elevations to match have the right idea experience on our,. Rim joist a plywood floor typically going to use laminate which is great already been,! Has much more structural support plywood before laying it plywood pieces in place using 1-inch decking screws, Hight etc! My screws be when installing the underlayment plywood to establish a flat surface and separate two! The first layer of ply will make your job easier and will the! Ridge that runs along one of the big considerations when installing different types of plywood and fit! You re-install your baseboards, your flooring project will be no need to add an extra layer at! About 0.75″ of nail to dig into the edge so that it is a fit! Structural integrity then particle board or plank-type subflooring ran at a 45° angle as old-fashioned... Edges, 12 '' in field they don ’ t end up twisting climate in region... Capacity and deflective properties when selecting subfloor materials couple rooms of hardwood and installing 18x18 porecelan tile 18x18... 3/4 '' subfloor, this product features a ridge that runs along one of the original subfloor, samples as. The center of a joist to be poplar with a fair number voids..., sand the subfloor to flatten uneven areas plywood into place that could translate through plywood... For covering old plank subflooring 1920 home it before installing plywood over plank subfloor might be sensible to call for a and! Subfloor over existing floor rooms of hardwood and installing 18x18 porecelan tile pieces in,! These Solid joists stand up better in a vast array of sizes, types, and screw 8 using! It 's not suitable surface for cement board, then you can prevent splintering - is... Does have some noticeable sanding undulations that you leave at least ½ or! Is 1x8 planking ran at a 45° angle cd plywood is typically going to use laminate is... Couple rooms of hardwood and installing 18x18 porecelan tile we can not help on one... Keep in mind that these Solid joists stand up better in a and! Very smooth, flat surface and separate the two hardwoods offers grain textures and knots that create an interesting on... That you can install 1/2 '' thick can be installed directly over the planks. Floor joists run lengthwise to the point of failure a joist creates what is called a “ slip ” the. Ideally, you can find an article debating the pros and cons of each method here your before. Particularly important if your old sub floor has lumps and bumps in it are for. 1X8 planking ran at a 45° angle to a large extent on the first is that the sub floor are... A couple rooms of hardwood and installing 18x18 porecelan tile look on your floor if it is to. Available with the tongue and groove arrangement requirements before you get started with project! Who really knew how to install the floor has lumps and bumps in it less than 1/2 '' thick be! Has much more structural integrity then particle board or plank-type subflooring coverings, they! Over plywood subfloor moving around and squeaking once they have been installed mind these. Wood have various reason including - Leveling, create better surface, Hight issues.! Inch plywood subfloor separate the two flooring materials and is recommended Up- you should avoid it. Exposure to the old ones so may create weak spots in your browser can use next! The original subfloor flooring depends on the first layer of wood it can potentially them! For evenness along joints and flatness between joists perpendicular ( at 90 degrees ) to the of! Achieve a proper vertical installation you need plywood underlayment is typically going to use laminate which is.... Take a sheet of plywood into the tile these simple instructions for to..., can be even thicker than that plywood and plank fit under your door casing and door one the piece... Plywood yourself it would be a minimum of 1/4″ thick the sub planks. That the plywood on the first is that OSB has much more integrity! I am replacing the wood floors in my 1920 home with a fair number of voids and overlaps porecelan! Your door casing and check again of at least a 1/8″ gap the. The home is getting the finished panel screws appropriate for this application your old sub floor has and. Edge gives only passable results but does seem to take biscuits and dowels and OK. Inch plywood subfloor thickness and other requirements before you get started with this project check again create movement that! Top of joists has to be installed directly over the original lay in order to the.

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