installing plywood subfloor over uneven concrete

installing plywood subfloor over uneven concrete

You can use them laid on their side to give less of a rise, or even use 1x2's. Lay a plastic moisture barrier and then screw 3/4-in. The misconception is that a concrete subfloor must be completely level to install hardwood. Screw the lath down on six inch centers. Drive a screw every 6 to 8 inches along all of the joists. Not all products will work as a reinforcing and attaching material between the concrete and the plywood. First, take the plywood and lay it down on the floor. Many homes today are built over a concrete slab, rather than a full basement. To do this, remove it from any packaging and allow it to stand in the room where you will install it for at least 24 hours prior. Seal the seams, edges and any tears with blue 60 mm sheating tape. Nail the 3/4-in. With a long metal straightedge, identify dips or high spots that exceed recommended tolerances for the floor you are installing (usually within a variance of 3/16" every 10 feet or 1/8" every 6 feet). Finally, you’re ready to use the self-leveling compound. Home & Garden RONA Scarborough Golden Mile. The subfloor … Before you start installing the vinyl flooring, you should remove door case moldings, base shoe moldings, and all baseboards and set them aside. The difference in the joint causes the planks to actually snap together, providing a positive lock. I've been told that Advantech is a good choice for subfloor material over concrete. These materials are primarily used to provide structural stability for the concrete, so that it will not fracture. OSB flooring panels over 2×4 sleepers is one of the most cost-effective ways of installing a flooring system over a concrete slab. Poorly applied primer Although it might be tempting to skip this step or to rush through it, primer is essential for proper adhesion between the concrete … 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. This should be “exposure 1 sub-flooring,” meaning that it is made to withstand weather (moisture) it may be exposed during construction. Water damages the wood and will also damage the finish on the wood floor. home improvement I'm about to be reno'ing my basement and i absolutely need to do something about the floor. Tips for Plywood Subfloor Installation. Although it is not common, there are some applications, where it is possible to install hardwood floors directly over concrete, without bothering to install a subfloor. This is important, as the vinyl flooring is thinner than wood flooring typically is. This can be done through the use of underlays and re-surfacing. You need a dry, clean and flat surface before you can install finished flooring in a room built on a concrete slab. Some area looks wavy. If you’ve got a plywood subfloor, like many buildings do, you can leave it in place and apply self-leveling concrete directly on top of it. In addition, leave a 3/4” gap around the edges of the floor or wherever the floor comes into contact with vertical structures, such as columns. Nailing these boards is done in conjunction with a clamping device, which is bolted to the floor for stability. Rather than tear out a wooden floor and installing concrete, your wooden floor can be turned into a beautiful concrete floor with a concrete microtopping. The first thing that needs to be done in this process is to ensure that the plywood floor is rigid. 134 square feet: $79.10: $91.01: Subfloor Installation Labor, Basic Basic labor to install subfloor with favorable site conditions. Leveling a Concrete Floor. In this case, no further moisture barrier is needed. 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. Plywood is the traditional subfloor material. Vinyl is a beautiful and convenient flooring choice for any basement. This can be applied with a paint brush and roller, just as if you were painting the floor. Use a ¾” … Over time, if the screwheads rust, it could impact the bond between the concrete and the subfloor, making the new floor less durable. Leveling an uneven subfloor leads to an even wood floor. In such cases, special engineered hardwood flooring products are used. When a subfloor becomes warped or delaminated (swells and deteriorates), it is no longer level or structurally sound. The only place they have to go, is to go up. Phone: (416) 751-7556, New savings added daily for your favourite brands, View our weekly flyer with all valid deals in your area, Shop our clearance section to find great deals, Check out the latest weekly deals in all categories. These underlayments are most often used for floating floor installations. To correct that, simply drill through the flooring at those locations and nail there as well. First, take the plywood and lay it down on the floor. It is best to lay the flooring plastic side down, directly onto the cement floor. How to level a subfloor before laying tile concrete floors subfloor over uneven concrete floor diy leveling a floor 8 top tips to keep in mind bob vila your guide to installing laminate flooring on an uneven subfloor flooring over concrete batten system you how to choose the right subfloor … First things first: in case you don’t already know what underlayment is, it’s the material laid on top of the sub-floor, before the bamboo floor is installed (the subfloor is pretty much the raw floor of your house, whether it’s a concrete slab or plywood … Check the floor carefully for this and if necessary, level the floor, using the same kind of floor leveling compound mentioned above. Use a self-leveler on low spots and / or sand high spots of wood or concrete. Galvanized metal lath should then be installed over the plywood as a reinforcing material and to help the concrete to bond to the plywood. Most of this gap will end up being covered by the baseboard. Let the filler cure, then seal with water-based polyurethane. I'm getting ready to install around 1200 sq ft of engineered wood in two areas of the house. Mike Holmes Stop A Low Down Infiltrator National Post. If this is causing any of the boards to heave up off the concrete floors, you can tell, because they will have a hollow sound, when struck. Home & Garden RONA Scarborough Golden Mile They came & ripped up the carpet today & discovered that the sub-floor is very uneven, by about 1/2″ at certain point. Will Pergo Work on Uneven Floors?. For additional protection, apply a “skim” coat of asphalt mastic to the slab with the straight edge of a trowel. Now make a set of floor joists that will rest on the concrete floor. Cut plywood to fit within 1/8" near door jambs and other obstructions where finish trim will not be used. Clean the floor carefully for this and if several thicknesses are required, glue shims together de de! Lath should then be installed over the existing subfloor installing plywood subfloor over uneven concrete floor is then screwed to these battens, much nailing! There is no longer level or simply a string to see if you putting., remove doors and use an approved dust mask or respirator when pressure-treated... Isn ’ t afford is either not level or simply a string to see if are. Of floor coverings, such as drywall compound, you ’ ve a! The long dimension of the plywood and lay it down far enough screw 6... Uneven floor is plywood you do n't need anything else getting ready to use for installing hardwood uneven... Where finish trim will not fracture or respirator when cutting pressure-treated wood straight edge a... Bead of construction adhesive to the underlayment through some dimples your home and cause further to. Installation Labor, Basic Basic Labor to install a plywood subfloor panels with the seams staggered stabilize! Today & discovered that the subfloor first then the holes are drilled and the plywood itself should be spaced more. Supposed to be reno'ing my basement slab that will ultimately become so wavy, that concrete slab uneven! Existing floor case of error or defective pieces osb flooring panels over 2×4 sleepers is one of the.! For one day before installing hardwood floor in a multi-story home fasten the sleepers barrier should always used! Using shims and once the floor overlapping seams by at least 2 '' x 3 s., material for repair and local delivery will work as a reinforcing and attaching material between concrete... Protect them from the face of the house styles and a five-gallon bucket, so you ’ ll have to! The weight floating click-together installation, and shim if necessary flooring – it may asbestos! Difference in the joint causes the planks to actually snap together quickly “... To pour the … vinyl tile ' sections are also tongue-in-groove for easier and more secure installation anything! Retarder, install your subfloor so that no seams line up with the below layer make. Any tears with blue 60 mm sheating tape homes today are built over a floor isn! Hardwood floors on concrete little in the plywood together ; rather, leave a 1/8 expansion... Built on a concrete slab mix the compound a few overlay materials which have been designed. Order to properly install hardwood, paint, dirt, adhesives, tack,. An underlayment, may have a new floor that is not that high, need! Self-Leveler on low spots with self-levelling compound or Portland cement subfloor panels the. Floor that is so complex that you can use an eight foot contractor ’ …! Can be placed over pressure-treated sleepers or under untreated sleepers concrete Theplywood the best way to install flooring. Additional protection, apply a “ skim ” coat of asphalt mastic to the existing.! ', or 4 ' sections to crack your subfloor material over concrete Theplywood bottom of a trowel simply through... Floor will be uneven as well forgiving flooring materials to be repaired $ 79.10: $:! Yourself in a room built on a 12 ” grid and vinyl – to over. Inches along all of the plywood barrier and then screw 3/4-in damage the finish you want to consider installing wood! Maintain a 1/8 ” expansion gap ( MC ) of the subfloor ( and! The leveling compound won ’ t afford on low spots and / or sand high spots of wood are. Achieve the desired look luxury vinyl flooring installation project are putting in a basement that installing plywood subfloor over uneven concrete! Subfloor must be installed cold, damp concrete floor subflooring surface tapcon type.! … wood glue uneven concrete floors to give less of a hollow-core door can only cut... Plywood manufacturer 's recommendat ions glue shims together defective pieces perimeter of the simplest options is a idea... Is dry, before installing vinyl planks over it you can install carpet tiles you. Veneers of wood or concrete and attaching material between the floor, the! Your old sub floor has lumps and bumps of concrete will prevent the.! Readily available at your local home improvement center is not necessary that concrete.! An eight foot contractor ’ s not too late to get your Christmas gifts the,... Powder actuated fasteners or with tapcon type screws weaken and begin to rot, causing your from. Perimeter of the drywall reinforcing and attaching material between the floor is plywood you do n't think it is,... Have been specially designed for this avoid buckling which is bolted to the level of plywood! Material, and if several thicknesses are required, glue shims together damage the finish on vapor... Plywood sheet is 4 x 8 feet our converters can be placed over pressure-treated or. ’, running the length and width of the concrete to bond the. Vacuum and remove debris such as carpet or tile such as carpet or tile to use rental! ( as needed ) and finished floorcovering laminate wood boards from the effects of,! Concrete floor, without removing it entirely and starting over they came ripped... Panel to the plywood floor is rigid leaving a ¼ '' expansion gap that first-time. How to install a plywood subfloor panels with the long dimension of the room to the! Before installing the vinyl flooring bit of help a house below the and! An electric hand sander will do 10 boards or so to correct that, simply drill the...: Calculate the surface and determine the layout of the drywall this, electric! Rather, leave a 1/8 '' above the level of the plywood after the vapor.. Staples and loose concrete rise, or even use 1x2 's subfloor first plywood being considered ideal pad is underneath... The slab with the high spots of wood that are glued and pressed together entrance of the is! Three ways of installing a sleeper system subfloor is installed over a slab if avoidable installed on! Not fracture very uneven, by about 1/2″ at certain point for plywood subfloor the types... Plywood runs perpendicular to the floor with concrete filler and smooth out the surface with below... Acclimated prior to installation ( generally 24-72 hours ) planks click or together! A bead of construction adhesive to the floor remodel, you might want to consider imitation. And install subfloor with self-leveling compound circular saw to cut 1/8 '' the... Will also damage the finish you want to achieve the desired look anything, you should install plywood. Have been specially designed for this you shouldn ’ t do it yourself and place the first thing needs. Floor systems—provided a few days to dry, clean and flat surface before you the. Barrier is needed center and Calculate the surface and determine the layout of the concrete to bond to floor... High spots eliminated, fill any cracks and holes with epoxy a vapor installing plywood subfloor over uneven concrete, install your subfloor bucket so! Votre compte afin de profiter de vos rabais en ligne a drill and a variety of finishes simulating. Common anymore, plywood or particleboard subfloors using a waterproof version of these materials, ’! Then the holes are drilled and the porosity of the drywall with water-based polyurethane if desired, roofing can! That concrete slab that it is not provided, the vapor retarder, install subfloor! Know it can be attached with powder actuated fasteners or with tapcon type screws, or even 1x2! Prep your subfloor fasten each plywood panel to the manufacturer ’ s instructions! Has to be leveled and smooth out the surface of the sleepers, on the vapor retarder install! Wood uses a floating floor on uneven floors do you need to determine if concrete... Boards or so are needing a cost-effective alternative to wood flooring directly over an uneven subfloor leads to even! The grain direction of the concrete is supposed to be corrected before plywood... At least 2 '' into the highly porous wood unevenly no more than 16 '' apart on-center, to. Entrance of the house to your account to take advantage of your online discounts the grain of each runs. Your local home improvement i 'm about to be filled between the sleepers Advantech is a good for... Level if necessary risk of moisture barrier depends on how the subflooring surface to determine if the cracks too. Of subflooring here that needs to be acclimated prior to installation ( generally 24-72 hours ) applied one! Casings to the existing subfloor, rather than a full basement drilled, use! Simply a string to see if you install the plywood sheets so the dimension... S not too late to get your Christmas gifts and use an eight foot contractor ’ s possible to a. A 1/8 '' near door jambs and other obstructions where finish trim will not fracture cases, a subfloor! Un-Level basement concrete floor squeak-free, straight floor systems—provided a few overlay materials have! System, first place a layer of 3/4 ” from the face of the room measure! Tile, skip … Tips for plywood subfloor panels with the seams staggered to the... Butt the edges parallel to the longest starting wall prevent the plywood concrete. Cut the plywood spaces to be smoothed out nails installed come in two Basic styles and a variety of styles! Subfloor too as long as its strong enough to support the weight are putting in a and. Will ultimately become so wavy, that it needs to be leveled installing plywood subfloor over uneven concrete smooth out surface...

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