The first step to proper installation is to get the subfloor in order. Traditional latexmodified or gypsum based underlayments will crack along joints, break. Yeah, a demolition hammer works good with a chisel. I made that really clear in my wood floor on concrete article. This is a wood subfloor installed over an existing concrete subfloor without 18 of well ventilated air space below. I have seen amazingly effective and some extremely expensive tools for leveling and scarifying concrete that can be either purchased or rented. I used a scraper and lightly hammered any spots that sounded hollow underneath to loosen any weak pieces. This is the most popular way to install engineered hardwood flooring because its stronger and more aesthetically pleasing. How to remove and replace a rotten subfloor youtube. The concrete subfloor must be sufficiently strong to safely support the flooring, furniture, and people in the room.
This gives the concrete a lower weight and lower density than traditional concrete. Concrete resurfacing over plywood substrate duraamen. If there is a floor joist available, attach a 1x3 to the joist and flush with the top of the floor joist. My steps for successful prep over a wood subfloor wood. After inspecting your boards and removing any defective ones, plan on following a running bond pattern of the grain. A new layer of 58inch or 34inch tongueandgroove plywood subflooring is like adding a new subfloor over the old to create a stiffer, flatter surface for any type of finished flooring. Place a layer of felt or polyethylene sheeting over the residue before installing the underlayment boards. To update flooring, you may need to remove wood tiles from concrete floors. Repairing a damaged subfloor direct wood flooring blog. These solvents and removers can get trapped in the concrete and cause the new adhesive to break down just like it did to the old existing adhesive. Concrete floor video on how to install concrete over an existing wood subfloor. I have also seen it in many many ski country condos without radiant heat, it was either fireblock for code or noise suppression, i dont know which. Smooth your cement subfloor before laying tile to ensure that the tile has a flat, even bed on which to rest.
Repairing a damaged subfloor is serious business, but it doesnt. The wood subfloor must either be solid hardwood flooring, a minimum of. Remove all floor tiles, leaving only adhesive residue on the concrete floor. Floated subfloor, alternate subfloor, gluedown sub floor and the naildown subfloor system. How to install a polished concrete over wood floor. Remove existing carpeting, sheet vinyl, and tile as well as any adhesives or mastic used to glue down the flooring. If we remove the wood and then end up with this glue all over the subfloor, i dont think we can get the glue up to have a nice clean surface for the new wood. Its best to place the underlayment over 34inchthick plywood fastened with screws at 12 to 16inch intervals to help decrease deflection and add stability. Ask this old house general contractor tom silva patches a chipped wood floor using a dutchman and hand tools. Patch and level a concrete subfloor preparing the concrete floor. Use a pry bar to remove any protruding nails and vacuum up the demolition debris.
Drive a screw through the hole, securing the floorboard back to the floor. If over wood, a new wood underlayment may be installed over the vinyl floors and then the new vinyl. Remove all baseboards to create the appropriate gap at the floor edges for. At one time, a concrete floor was regarded as a very basic, utilitarian surface suited only for a basement slab, utility room or garage. I was thinking it might be easier to cut it out all together including the sub floor and start over. Particular care must be taken when cutting into moldy wood because the process sends mold spores flying into the air. Repairing minor holes in a cement floor before laying tile. May 05, 2015 if you have carpet, that can be patched so you could patch the subfloor without removing more carpet.
Use a circular saw set to 1 depth to cut the subflooring back beyond the damaged areas until you reach solid structural framing. Sleeperconstructed subfloor consists of wood subfloor installed over or on an existing concrete subfloor on. The floor patch and leveler will remain flexible allowing the plywood subfloor to flex without cracking the filledin areas. Concrete resurfacing over wood or plywood substrates duraamen. How to install a wood subfloor over concrete olde wood ltd. See more ideas about plywood subfloor, concrete and concrete floors. Jan 07, 20 patch and level a concrete subfloor preparing the concrete floor. Subfloor prep installation faqs armstrong flooring. Should i put an anti fracture peel and stick membrane down on the wood then pour cement.
Sleeperconstructed subfloor consists of wood subfloor installed over or on an existing concrete subfloor on or. The experts show how to repair a waterdamaged subfloor. Typically you can see where the nail line is on the subfloor, but obviously a stud finder can work too. Ar is right about the subfloor, replace it if there is any doubt, otherwise you might have to patch and overlay cement board to get it true again. The temperature of the existing concrete must remain above 50 degrees for the first 24 to 48 hours after the patch is. How to patch and level a concrete subfloor concrete. Product costs, availability and item numbers may vary online or by market. May 14, 2018 learn how to install beautiful hardwood floors over a concrete slab. With a hammer drill and a 1 chisel, its easier to scrape off the areas where the bottom of the porcelain tile broke away from. How to remove vinyl flooring removing old linoleum. Drill a hole through the chipped part of the floor using a countersink bit. I typically use 36grit on an edger to sand the seams and high spots. Plan the layout of the plywood sheets so the long dimension of the plywood runs perpendicular to the floor joists.
I consulted with our contractor and then watched the heck out of youtube both of which confirmed that patching a subfloor is totally doable. Oct 14, 2019 if you have a subfloor that consists of wood on top of concrete, youll need to test both floors. Vinyl concrete patcher is made of a special blend of vinyl resin, fine sand and portland cement. Do i worry about the compound leaking down under the subfloor at the seams. Patching compound on plywood subfloor for laminate prep.
The subfloor should be solid and fixed securely to provide a rigid base. Removing paint from concrete is a timeconsuming endeavor, but a determined diyer is certainly up to the task. The first step is to put some dead wood underneath the hole so you have a way to secure the patch. Floated subfloor, alternate subfloor, gluedown sub. Ive only ever seen gypcrete over some sort of wood subfloor. I am just not a fan of osb in general for a few reasons that is why i would use a sympathetic material like 18 plywood door skin, then fasten through it into the subfloor. How to quickly remove tile, mortar, and lathewire mesh over a plywood subfloor. One reason the linoleum glue must be removed from the wood, or any subfloor, is because some older adhesives had oils in them that chemically react with new vinyl to cause a yellow discoloration. Moldy wood removed from the subfloor should be enclosed in double plastic bags before it is carried through the house.
Also, trying to remove the existing subfloor proved a challenge as it appears that there are several layers of subfloor that were added over the years so removing all of those layers is quite a bit of work as well. Readytouse, latexbased product used to fill cracks, fastener or knot holes and level low areas in plywood subfloors or concrete surfaces. Otherwise, lay a very straight metal bar or wood board on the floor and place a level on top. How to repair or replace a damaged section of subfloor. Removing porcelain tile on stapled and glued subfloor. Dec 19, 2018 before you install any flooring material over a concrete slab, it is important to inspect the slab for defects. A wellprepared subfloor is key to lasting hardwoods and laminates. Use a circular saw set to 1 depth to cut the subflooring back beyond the damaged areas until you reach solid.
Its important to know where the joist is because youre going to remove the damaged plywood right up until the floor joist without cutting over the floor joist. Patching compound on plywood subfloor for laminate prep the. Check your flooring manufacturers recommendations to ensure youre using a proper subfloor. How to remove vinyl flooring removing old linoleum floors, glue. How to install polished concrete over plywood substrate. How to remove tile, mortar and lathe from a subfloor youtube. A relatively rigid product like patch leveler tends to not get along with all that movement in your subfloor.
Its only for plywood and concrete, but i tested some on my exposure 1 rated osb subfloor and it seems to work. How to put down flooring on a cracked concrete slab home. The goal is to make sure that the two pieces of subfloor dont move independently. After the filler hardens, sand it smooth with the surface. Patch tackstrip holes and cracks in the existing floor. Before the radiant heating industry figured out how to put the tubes under the floor well it was used to encapsulate the radiator. If the wood patch is about an 18 smaller than the opening, that is okay. The surface of the wood must be clean and free of oil, grease, wax, dirt, varnish. Ideal for filling and leveling surfaces prior to installation of carpeting, vinyl floor tile or sheeting, as well as ceramic or mosaic floor tile. How to level an uneven osb subfloor before laminate. Find out how concrete floors are installed over a wood subfloor. Before pouring the self leveler there is some prep work required. Each tile is a sandwich consisting of a moisture barrier at the bottom, an elevating surface in the middle usually no more than an inch high, and a composite wood top, usually osb board.
Drop a little bit of water in the hole, then add some polyurethane glue. Lightweight concrete weighs between 65 and 100 pounds per cubic foot. First of all, solvents and adhesive removers are not recommended for removing existing adhesive and then having flooring installed back over top by all flooring, patch, and adhesive manufacturers. Heres what youll need to do before you can apply stain to a concrete subfloor.
If you appreciate the functionality but want to add style to an existing concrete slab, you can stamp new concrete overlay over the surface. Homes with slabongrade 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. Fill any low spots with a cementitious leveling compound following the. Im just focusing on patching the subfloor in this post to keep it simple. How to install engineered hardwood floor over concrete.
You could certainly try a heavy crowbarripping bar on it, and see which is more effective. Wait at least 24 hours before walking on the patch and a week before driving on it. In the photos above, tom zilian of madstone floors from boston, ma created an polished concrete floor over a plywood substrate. Subfloor systems are often composed of individual tiles, each approximately 24 inches by 24 inches. How to remove wood tiles from concrete floors home guides. Dips, bulges and cracks occur frequently as concrete cures and ages.
For more information, read tips for removing existing flooring from concrete. To help you start your installation project off right, here are a few tips for preparing your subfloor. Prepping a plywood subfloor for hardwood or laminate flooring. If you have a subfloor that consists of wood on top of concrete, youll need to test both floors. For locations where carpet is going to be installed, lightweight concrete is an acceptable material for building a subfloor. Dips and cracks in the subfloor can cause tile to tilt, settle or crack. Aug 25, 2016 first of all, solvents and adhesive removers are not recommended for removing existing adhesive and then having flooring installed back over top by all flooring, patch, and adhesive manufacturers. I did find one interesting and extremely expensive product called dap flexible floor patch. Aug 26, 2019 removing old linoleum or vinyl is generally quite difficult because wood, a common subfloor, is porous, thus absorbing the adhesives. How to install a plywood subfloor on a concrete slab hunker. Cut a piece of plywood slightly larger than the opening youre trying to fill and screw it to the underside of the subfloor so it covers the hole. Some people refer to this as subfloor, when technically it is n. There are two vinyl floors already down, is there any option other than removal. Vinyl is one of the few types of floors that can be safely installed over concrete, wood, or other solid floors.
Prepping a plywood subfloor is crucial for hardwood or laminate floors that last. Vinyl concrete patcher is ideal for making smooth repairs to crack or chipped concrete floors, sidewalks or steps. When is lightweight concrete the best subfloor solution. As the filler starts to cure, shape it to conform to the molding. Over time, a sink or refrigerator water leak can damage and even destroy flooring materials and the subfloor below it.
I have took up my carpet and foam, cleaned my subfloor and i would like to pour cement. It has strong adhesive properties allowing it to be applied down to a featheredge. After the repair mortar cures if using, install the underlayment to provide a smooth. Subfloor systems replace building subfloor from scratch. If you have solid wood strips glued directly to the concrete slab, this sadly, is the type of installation that will give continuous problems over the years. Over a large area, it will fill in cracks and holes, but if you pour more material in a corner area. If its a gluedown project over a wooden subfloor, i have scarified the substrate with 16grit paper on a buffer. Subfloor a subfloor is selected for structural purposes and is the substrate supporting layer for the underlayment.
If you use a hand grinder, just protect yourself from the dust. Be sure the patch material is the same thickness as the subfloor. You can get concrete grinding blades that work good too. Now, from the top, cut another piece of plywood to. If the gaps are this big, it seems that buying enough concrete selfleveler will be cost prohibitive. How to patch and level a concrete subfloor pretty handy girl.
Brent kelosky, a wood flooring specialist, describes two ways to replace a damaged section of hardwood floor. How to choose the right subfloor leveling techniques. The moldy subfloor must also be removed and replaced. May, 2020 prepping a plywood subfloor is crucial for hardwood or laminate floors that last. Removing porcelain tile on stapled and glued subfloor you never need primer or wire for levelee over plywoodits a double layer at that just use dash patch if you dont want to add an additonal layer. How to replace repair rotted sub floor, rotten floor. To replace the subfloor you removed for a heat register, start in the basement. Im hoping that i can patch up the subfloor and not have to lay a new subfloor. Learn how to install beautiful hardwood floors over a concrete slab.
Concrete staining after removing existing floor covering. Learn how to prepare a concrete subfloor for installing hardwood or laminate flooring. Get a comprehensive breakdown on which materials to use, what to take into consideration and what steps to take for four subfloor systems. Removing both of these things left behind obvious water damage and rot next to the bathtub and a hole in the floor where the plumber had capped off the bidet line. Successful flooring project depend on correct surface preparation. Flattening osb subfloor for lvp the floor pro community. Start by completely removing the damaged materials.
How to level a subfloor to prepare for new flooring. Concrete underlayments, installing underlayments, and info on. Dealing with old adhesive residue the flooring professionals. Pouring concrete over wood floor everything about concrete. If you have carpet, that can be patched so you could patch the subfloor without removing more carpet. Concrete on or below grade will have some moisture in it due to its proximity to the ground. How to patch damaged or rotten wood todays homeowner. Its what you dont see that is the most important part of a beautiful, longlasting hardwood or laminate floor. Before you install any flooring material over a concrete slab, it is important to inspect the slab for defects. If the damage is through the entire board, the fix requires removing the damaged piece down to the subfloor with a router. Prepping a concrete subfloor for hardwood or laminate flooring. Do i use the patch in the gaps between the plywood sheets.
Remember to leave expansion gaps between the flooring and wall. If the remaining solid wood is wet, ventilate the area and allow it time to. Use a 6 staple pattern at the perimeter of the subfloor. Is patching compound the appropriate product to use to flatten a plywood subfloor. Removing your old flooring to reveal a damaged subfloor is. Removing old linoleum or vinyl is generally quite difficult because wood, a common subfloor, is porous, thus absorbing the adhesives. Concrete resurfacing over wood or plywood substrates. With wood floor, you generally have to remove more than what you need to patch before you start laying new pieces. For a texture, pull a damp push broom over the concrete.
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