Plastic for vapor barrier between plywood and slab. Concrete resurfacing over wood or plywood substrates. How can i pour a concrete floor over a particle board subfloor. Readytouse, latexbased product used to fill cracks, fastener or knot holes and level low areas in plywood subfloors or concrete surfaces. What is the best way to install a plywood subfloor over concrete slab. You need to be aware of any concrete substrate that has known moisture problems, and remember that new slabs will be high in moisture. How to install polished concrete over plywood substrate. In the northern states, where concrete is used for flooring in. For that reason, the adhesive you choose depends on the environment and the conditions during installation. Before you install any flooring material over a concrete slab, it is important to inspect the slab for defects. We are building a 2story condominium complex with concrete slab ongrade.
This compound can potentially be utilized on a concrete slab or a wood subfloor, and it works well when you are dealing with dips in the floor. Wait at least 24 hours before walking on the patch and a week before driving on it. What do you tell your customers who have a concrete subfloor and want to install hardwood. Two, it can be installed at any grade level including below grade. How to install engineered wood flooring on concrete. Mannington lvf is recommended for use over properly prepared concrete, suspended wood, metal and other suitable substrates. Engineered wood flooring can be glued or floated over the top of a fullycured concrete slab. How to install self leveling over a wood subfloor youtube. Usg durock brand quikramp floor patch is a calcium aluminate cement based product for interior use over concrete and wood subfloors, as well as. Wire lathe was shot over the subfloor, and scratch coated then the leveler applied over top. Not doing the right prep on a slab can result in embarrassing. In our region of the country, installing over concrete slabs is something we do every day, no matter what kind of wood floor were putting down. The wood subfloor must either be solid hardwood flooring, a minimum of.
This can cause adhesives to loosen, flooring planks to warp, and mold and mildew to develop. We are building a 2story condominium complex with concrete slabongrade. A wellprepared subfloor is key to lasting hardwoods and laminates. Gluing down solid wood flooring to concretethis is a question that i have started to receive more and more. Pouring concrete over wood floor everything about concrete. Instead, you should install strips of wood on the slab as nailers, 2x4s.
You mix it with water in a bucket until it creates a thick paste. Concrete resurfacing over plywood substrate duraamen. So you might want to consider filling the crawl space. To protect against moisture rising through subfloors, the installer needs to make sure there is a proper moisturevapor retarder. Yes, its not great idea and it will likely crack because the wood is flexible and the concrete is rigid. I dont think having concrete over particle boards is an option. It spreads across uneven slabs, filling in low spots as it creates a new, level surface. How to prepare a subfloor for tile installation the home. Preparing a subfloor for wood flooring wood floor business. On woodframe floors, the subflooring provides a continuous structural surface over the floor joists. How to repair a hole in the floor of a slab foundation.
What is a sleeperconstructed subfloor and why cant i install flooring over this. During renovation and remodeling of existing buildings, more and more people are looking for ways to convert their existing wood or plywood. Engineered flooring installation on concrete hardwood. Overlays over wood surfaces by chris sullivan chemsystems, inc. Its not as simple as just ripping it up and starting again. Feb 25, 2015 last week i made a concrete subfloor leveling in the living room which connected with a long hallway. Most homes in the south are built on a concrete slab as basements are not an option in high watertable areas. In many situations, the installation method calls for an installation of a wood subfloor. Should i put an anti fracture peel and stick membrane down on the wood then pour cement. Oct 14, 2019 if you have a subfloor that consists of wood on top of concrete, youll need to test both floors. The first things to consider if you want a wood floor on the concrete are flatness, and moisture incursion. The concrete subfloor must be sufficiently strong to safely support the flooring, furniture, and people in the room. The temperature of the existing concrete must remain above 50 degrees for the first 24 to 48 hours after the patch is applied.
Dips, bulges and cracks occur frequently as concrete cures and ages. Should i put a membrane between the concrete topping over plywood subfloor im working in a condo right now that was built in 1989 with standard wood not pt with a 1. Get a comprehensive breakdown on which materials to use, what to take into consideration and what steps to take for four subfloor systems. Patch and level a concrete subfloor preparing the concrete floor. If a wood subfloor is laid over an existing slab, the membrane can be cemented to smooth, cleanswept concrete. Learn how to install beautiful hardwood floors over a concrete slab. Prepping a plywood subfloor for hardwood or laminate flooring. We have experience resurfacing concrete with microtoppings and polymer overlays, and we are now just starting to do this process over woodeither interior floors or upperlevel patios that do not have enough clearance for concrete. Installing a floating subfloor over your cement floor can add warmth, homeliness, and character to your room. Homes with slabongrade foundations often had solid concrete as the. Installing overlays over wood surfaces the concrete network. Installations over gypcrete the purpose of the information is to outline ideal flooring options and applications over gypcrete. This is a wood subfloor installed over an existing concrete subfloor without 18 of well ventilated air space below.
When installing over a concrete subfloor, the main concern is moisture. If not, your floor covering, which is the solid hardwood, laminate, tile, or other exposed flooring that goes on top of the subfloor, will never be flat and level. The safest way to approach questionable concrete is not to cover it over with cbus but to fix the concrete. Materials include a minimum of 34inch cd exposure 1 plywood subfloor panels, 4foot by 8foot sheets. Other products are bettersuited for a naildown installation where they are secured to a wood subfloor with nails or staples. Should i put a membrane between the concrete topping over. Follow the steps below to begin preparations for this process.
To prevent that movement from creating cracks in your grout and tile, once your concrete subfloor is clean, flat, and free of cracks larger than 18 inch, you will need to install a crack prevention. Diy painted particle board floor mmmm teal diy painted particle board floor mmmm. Mar 27, 2018 when direct gluing a wood subfloor over concrete, follow the adhesive manufacturers recommendation for moisture requirements and limitations, type of adhesive, application method, trowel notch type, and spread rates. After the repair mortar cures if using, install the underlayment to provide a smooth, level. In the photos above, tom zilian of madstone floors from boston, ma created an polished concrete floor over a plywood substrate. This makes engineered wood flooring a better choice for installing over a dry concrete slab. Laying laminate flooring over concrete can look great and last for many years when installation factors involving the characteristics of concrete are addressed. For abovegrade applications, your flooring manufacturer should provide recommendations for installing a floated subfloor. Floated subfloor, alternate subfloor, gluedown sub. For ongrade and belowgrade installations, however, nwfa guidelines recommend a vapor retarder anytime.
Subflooring is a structural layer and should not be confused with. How to choose the right subfloor leveling techniques. The first step to proper installation is to get the subfloor in order. Self leveling compound or underlayment can be poured over a.
Use over concrete, wood, vct, existing patching and leveling materials and nonwatersoluble adhesive residue on concrete. The installation of calcium aluminate cement based selfleveling concrete, param 5500 along with expanded metal lath for reinforcement is a successful fasttrack method to convert a plywood subfloor into a beautiful concrete floor. At one time, a concrete floor was regarded as a very basic, utilitarian surface suited only for a basement slab, utility room or garage. Score the back of the panels half of the thickness on a 12inch by 12inch grid. Product costs, availability and item numbers may vary online or by market. Installing hardwood flooring over concrete howtos diy. The subfloor is the foundation beneath finish flooring materials. A concrete dye was also sprayed on to create mottling and natural curing splotching in the floor. How to install engineered hardwood floor over concrete. For a texture, pull a damp push broom over the concrete. Concrete is a porous material that can allow water to seep up into it and through to your flooring. Cut plywood panels by 2foot by 8foot or 4foot by 4foot sections. Heres a little self leveled floor action they poured a self leveler over a wood subfloor and created the look of a monolithic concrete slab.
Several materials are available when choosing flooring that can be applied directly over the concrete. On wood frame floors, the subflooring provides a continuous structural surface over the floor joists. Installing wood subfloors over concrete hardwood floors. Before pouring the self leveler there is some prep work required. How to lay a floating subfloor over concrete part one. Follow these installation guidelines when installing a wood subfloor. It is ideal for leveling larger areas, and can be used over precast floor slabs, new concrete, weather damaged concrete or finished concrete with rough or otherwise unacceptable surfaces. Cracks and gaps can be filled with portland cementbased fillers. The cooler the weather, the longer the curing time. There are several subfloor installation methods, each with its. Nov 18, 2018 helpful tips on how to pour self leveling concrete over a wood subfloor. For the second story a foamed type of lightweight concrete is being used over plywood for sound absorption between floors. Concrete floor video on how to install concrete over an existing wood subfloor. But its considerably more difficult to install a 34in.
Adding an underlayment to the existing subfloor, by installing plywood over a slab. Like any wood product, engineered hardwood expands and contracts because of changes in moisture. Nail down installations in crawl spaces under the subfloor, 6 mil poly sheeting plastic should be placed over the dirt. Installing an engineered hardwood floor over a concrete slab. How to install a plywood subfloor on a concrete slab hunker. Find out how concrete floors are installed over a wood subfloor. A floating subfloor is flooring that actually never touches. In basements and in homes with slab ongrade foundations, the subfloor may simply be a concrete slab. Its best to place the underlayment over 34inchthick plywood fastened with screws at 12 to 16inch intervals to help decrease deflection and add stability. Ardex liquid backerboard over wood subfloor to allow stained. Smooth your cement subfloor before laying tile to ensure that the tile has a flat, even bed on which to rest. Please send us information regarding the proper chemical to use to achieve the proper mix for the lightweight concrete.
Ardex liquid backerboard over wood subfloor to allow stained concrete flooring in a home with a. If you love solid wood floors and your home rests on a concrete slab, youre not out of. I used a scraper and lightly hammered any spots that sounded hollow underneath to loosen any weak pieces. Concrete over a plywood subfloor with 16 on center floor joists. Usg durock brand floor patch quikramp submittal sheet. Concrete on or below grade will have some moisture in it due to its proximity to the ground. Sep 10, 2018 we are going to take up the carpet in our living and installingl laminate flooring. I dont think it is a good idea to install raw plywood directly over a slab if avoidable. You can create a floor that is appealing and that will act a barrier between the cold cement and your interior. It will eliminate the risk of your floor collapsing under its own weight. Its what you dont see that is the most important part of a beautiful, longlasting hardwood or laminate floor. For the second story a foamed type of lightweight concrete is being used over plywood for sound absorption between.
We recommend an engineered hardwood for several important reasons. Concrete underlayments, installing underlayments, and info on. Jul 17, 2017 hunker may earn compensation through affiliate links in this story. If you have a subfloor that consists of wood on top of concrete, youll. How to prepare a subfloor for tile installation the home depot. Site conditions must comply with the relevant building codes and local, state and national regulations. When the adhesive requires, add a moisture control system before applying the adhesive. Now dont confuse flatness with levelness, you cannot simply put a 2foot level on a small patch of. How to put down flooring on a cracked concrete slab home. A slab poured over an existing slab is more vulnerable to frost heave damage and cracks. And for doityourselfers, the preferred method is the floating floor installation which. Some engineered wood flooring products are designed for a gluedown application when installing flooring over a concrete slab.
How to install laminate flooring over concrete 2020 home. For super sound control even in open beam, concrete slab and exposed. The subfloor should be solid and fixed securely to provide a rigid base. Jul 25, 2019 the subfloor is the foundation beneath finish flooring materials. How to install a polished concrete over wood floor. Premixed patch and level can be used indoors or outside on underlayment. Jan 07, 20 patch and level a concrete subfloor preparing the concrete floor. My answer to that is yes and it is still warranted. Traditional latex modified or gypsum based underlayments will crack along joints, break. Not doing the right prep on a slab can result in embarrassing problems, such as floating floors with so much deflection that the lamp on the end table shakes back and forth when someone walks by.
Types of subfloor materials in construction projects. Gypsum concrete is a building material used as a floor underlayment. The ultimate guide to laminate flooring underlayment. Installations over gypcrete lumber liquidators flooring co. How to install vinyl plank flooring on concrete step by. One, its much less sensitive to changes in humidity compared to wood that can swell with moisture and temperature. Gluing down solid wood flooring to concrete stovers. Lay a plastic moisture barrier and then screw 34in. If you plan on leveling a concrete floor, you can do so with relative ease by using a leveling compound. Homes with slab ongrade foundations often had solid concrete as the subfloor, but it was always covered over with some type of finished flooring material, such as carpet, vinyl, hardwood or laminate. Repairing minor holes in a cement floor before laying tile. Dips and cracks in the subfloor can cause tile to tilt, settle or crack. If you have a subfloor that consists of wood on top of concrete, youll need to test both floors. To prevent that movement from creating cracks in your grout and tile, once your concrete subfloor is clean, flat, and free of cracks larger than 18 inch, you will need to install a crack prevention membrane.
How to install a wood subfloor over concrete olde wood ltd. Dec 19, 2018 before you install any flooring material over a concrete slab, it is important to inspect the slab for defects. This video demonstrates the installation of selfleveling concrete over plywood substrates. Subfloor prep installation faqs armstrong flooring. The floor patch and leveler will remain flexible allowing the. How to patch and level a concrete subfloor pretty handy girl. The floor patch and leveler will remain flexible allowing the plywood subfloor to flex without cracking the filledin areas.
In addition, a 15 lb felt paper should be placed between the sub floor. Trick for leveling a concrete floor mryoucandoityourself. I have took up my carpet and foam, cleaned my subfloor and i would like to pour cement. I typically tell people to prep a wood or nonconcrete surface as you would for tile.
The temperature of the existing concrete must remain. Other products are better suited for a naildown installation. Installing wood flooring over concrete family handyman. How to install a subfloor over concrete the national wood flooring association issues guidelines for installing wood subfloor over concrete. If you can determine that your existing framing can carry that much additional. Frankly, stacey, the thought of a concreteoverwood floor frightens me badly. Prepping a plywood subfloor is crucial for hardwood or laminate floors that last. Combines ardex technology with advanced lightweight bead technology. The process will depend on the type of subfloor and the nature of the problem. Self leveling compound or underlayment can be poured over a wood subfloor, but it is critical to choose the right. You can either roll on a liquid latex membrane, or put down a peelandstick crack prevention mat over the entire concrete subfloor. Selfleveling compound is similar to concrete, typically coming in large bags in powder form. We put laminate in our hallway an 2 bedrooms about 9 years ago and never used extra underpayment. Helpful tips on how to pour self leveling concrete over a wood subfloor.
Oct 14, 2019 prepping a plywood subfloor is crucial for hardwood or laminate floors that last. The original plan was to do a 2 concrete pour over our radiant heat system as recommended by our builder. Patch damages as soon as they develop to prevent them from spreading, and seal the new layer with a deep penetrating sealer to prevent water damage. It can be constructed from wood, plywood, plastic or concrete. Vinyl is one of the few types of floors that can be safely installed over concrete, wood, or other solid floors. Oct 07, 2017 laying laminate flooring over concrete can look great and last for many years when installation factors involving the characteristics of concrete are addressed. With a concrete subfloor, you will need an underlayment that. The challenges of laying laminate on concrete for longterm performance your laminate wood floor needs to be dry, level and clean.
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