2 inch concrete over wood subfloor patch

Plan the layout of the plywood sheets so the long dimension of. Jul 25, 2019 the subfloor is the foundation beneath finish flooring materials. If i change the subfloor i will have a height problem where new floor meets the old floor. Should i put a membrane between the concrete topping over. 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. I would really appreciate your advice on the mix ratio and application. The temperature of the existing concrete must remain above 50 degrees for the first 24 to 48 hours after the patch is applied. Water the old concrete to prevent it from absorbing moisture from the new concrete. Patching compound on plywood subfloor for laminate prep the. A wellprepared subfloor is key to lasting hardwoods and laminates. Subfloor must be free of all debris, oil, grease, paint or other foreign substances. How to install a polished concrete over wood floor. 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. They poured a self leveler over a wood subfloor and created the look of a.

For large or deep cracks, you can use quikrete sand mix or the companys concrete bonding adhesive. Overlay cements are sticky and require experience in terms of troweling a finish. All the joints in the plywood were seamed with a fiber glass tape which was then secured with a cementitious fast patch compound. Fill sink or basic with approximately 34 to 1 inch of warm water. How to install self leveling over a wood subfloor duration. Prepare a solid, squeakfree subfloor one of the keys to a longlasting tile installation is the underlying subfloor. Yes, its not great idea and it will likely crack because the wood is flexible and the concrete is rigid. Prepping a plywood subfloor for hardwood or laminate flooring. Various thickness overlay concrete construction magazine. To get your wood subfloor ready, the first thing to do is to make sure the wood sheathing that is on top of the joists is securely fastened.

Concrete resurfacing over plywood substrate duraamen. Over time, a sink or refrigerator water leak can damage and even destroy flooring materials and the subfloor below it. Lightweight concrete made with expanded shale, clay or slate aggregate produced by the rotary kiln method has also been used very successfully in an operation of this kind. The subfloor is the foundation beneath finish flooring materials. Naildown subfloor system get 34 inch minimum cd exposure 1 plywood subfloor panels, 4foot by 8foot sheets. When and how to use plywood underlayment the spruce. Most plywood underlayment is about 14 inch thick and has square edges and a smooth, knotfree top face. How to prepare a subfloor for tile installation the home. My steps for successful prep over a wood subfloor wood. Typically you can see where the nail line is on the subfloor, but obviously a stud finder can work too. Screwing the plywood down to the floor joists should.

So one corner may have about 1 1 2 inches of concrete and the other about 3 1 2 inches. How to patch wood subfloor surrounded by gypsumgypcrete. Nov 14, 2010 small cracks are easy to patch with quikrete gray selfleveling concrete crack seal. The first step to proper installation is to get the subfloor in order. How to install self leveling over a wood subfloor youtube. Frankly, stacey, the thought of a concreteoverwood floor frightens me badly. The goal is to make sure that the two pieces of subfloor dont move independently. Patch and level a concrete subfloor preparing the concrete floor.

Whatever your subfloor is made of, be sure its squeak free before you install the cement board. Overlap adjacent pieces of lath mesh approximately 2. Your 1 2 subfloor underneath is going to deflect and then crack your finish tiles. Concrete floor video on how to install concrete over an existing wood subfloor. Subfloor a subfloor is selected for structural purposes and is the substrate supporting layer for the underlayment. Patching and repairing subfloor at charlottes house.

Use galvanized 8d nails or deck screws to fasten the new plywood to the floor framing. Readytouse, latexbased product used to fill cracks, fastener or knot holes and level low areas in plywood subfloors or concrete surfaces. Its best to place the underlayment over 34inchthick plywood fastened with screws at 12 to 16inch intervals to help decrease deflection and add stability. We recommend applying param 5500 at a minimum thickness of 38 12 is preferred to. Self leveling compound or underlayment can be poured over a wood subfloor, but it is critical to choose the right product and to follow the correct methods when installing. Plan the layout of the plywood sheets so the long dimension of the plywood runs perpendicular to the floor joists. The overlay may be as thin as 38 of an inch, so the surface prep is keenly important. Wait at least 24 hours before walking on the patch and a week before driving on it.

The cooler the weather, the longer the curing time. Its possible to expect a 20 30 year life expectancy from a properly executed repair. It is often applied using a dry pack method wherein only enough water is mixed to ensure proper set but wet enough to pack, shape, feather, and blend. The subfloor should be solid and fixed securely to provide a rigid base. It can also be used under hardwood, laminate, and carpet, but this is much less common these days because subflooring is typically smooth enough for these materials, many of which are installed with a different type. I typically use 36grit on an edger to sand the seams and high spots. I highly recommend installing coarsethreaded screws in addition to the nails that might already be in place. How to install polished concrete over plywood substrate. See more ideas about plywood subfloor, concrete and concrete floors. Diy experts show how to get rid of a squeaky floor with these steps. All about installing hardwood floors over different subfloors.

Next, attach galvanized metal lath to the plywood subfloor as a reinforcing material. If you are able to pinpoint the problem and determine that you must rip up the old subfloor and install a new one, or repair the joists that hold it up, let your customer know that the scope of the project includes more than just installing a new floor. 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. Sleeperconstructed subfloor consists of wood subfloor installed over or on an existing concrete subfloor on or.

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. Traditional latex modified or gypsum based underlayments will crack along joints. The original plan was to do a 2 concrete pour over our radiant heat system as recommended by our builder. In any case, the moisture content of the wood subfloor should be within 4 percentage points of properly acclimated solid strip flooring within 2 percentage points of solid plank flooring. Subflooring is a structural layer and should not be confused with. Will i be ok if i use 2 staples and hit all the floor joists.

Ideal for filling and leveling surfaces prior to installation of carpeting. If youre applying the concrete topping to a wood floor where you have moisture concerns, a flexible waterproofing membrane over the plywood is all that is needed to provide protection from moisture. Find out how concrete floors are installed over a wood subfloor. To help you start your installation project off right, here are a few tips for preparing your subfloor. We recommend 14 in hardiebacker ensure subfloor is not. On wood frame floors, the subflooring provides a continuous structural surface over the floor joists. Going over cracked, loose, crumbly gypcrete is not a good idea. If youre performing this service for a client, be sure to manage their expectations. It has been compromised and is flexing, thus the cracks. My recommendation is to staple down diamond mesh over the plywood before placing the overlay. Preparing a subfloor for wood flooring wood floor business. Prepping a plywood subfloor is crucial for hardwood or laminate floors that last. The floor patch and leveler will remain flexible allowing the plywood subfloor to flex without cracking the filledin areas.

If the gaps are this big, it seems that buying enough concrete selfleveler will be cost prohibitive. 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. Replacing with a new solid subfloor with the proper materials is key, you have many options. Go over the surface with a wire brush to rough it up to help the new concrete adhere to the old. This video demonstrates the installation of selfleveling concrete over plywood substrates. Concrete over a plywood subfloor with 16 on center floor joists. Naildown subfloor system get 34inch minimum cd exposure 1 plywood subfloor panels, 4foot by 8foot sheets. Its best to place the underlayment over 34 inch thick plywood fastened with screws at 12 to 16 inch intervals to help decrease deflection and add stability. How can i pour a concrete floor over a particle board subfloor. Make sure subfloor is dry, level and fastened correctly. Vinyl is one of the few types of floors that can be safely installed over concrete, wood, or other solid floors.

Forcing patch into the joints will cause telegraphing in resilients once the sheets expandcontract, breaking the patch at the joint. How to install a floor underlayment to wood subfloors home. All fasteners must be countersunk or flush with the subfloor. Concrete slabs should be flat, use a leveling compound to fill any depression or voids. I know that i am pushing the subfloor thickness but the rest of the house has 34 oak over the same subfloor. How to level a subfloor to prepare for new flooring. What is the 2inch layer of masonry under my bathroom tile. How to pour a leveling layer of concrete over the existing. I have seen amazingly effective and some extremely expensive tools for leveling and scarifying concrete that can be either purchased or rented. How to install a floor underlayment to wood subfloors. 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. Then he poured our paraam 5500 self leveling concrete about 14 inch thick with a smooth finish. Do i use the patch in the gaps between the plywood sheets.

Is patching compound the appropriate product to use to flatten a plywood subfloor. Product costs, availability and item numbers may vary online or by market. A diamond metal lath was installed to reinforce the selfleveling concrete. Plywood underlayment is a thin plywood material that is most commonly used under resilient flooring materials, such as vinyl and linoleum sheets and tiles. In this project tom had to remove old tile and install another layer of 34 thick plywood. After the repair mortar cures if using, install the underlayment to provide a. In the photos above, tom zilian of madstone floors from boston, ma created an polished concrete floor over a plywood substrate. Then we are applying a 6 mil polyethylene vapor barrier over the entire area which will be covered by 34 inch plywood. A new layer of 58 inch or 34 inch tongueandgroove plywood subflooring is like adding a new subfloor over the old to create a stiffer, flatter surface for any type of finished flooring. The trick to a longlasting concrete repair lies in bonding the new material to the old material. If one uses a lightweight concrete weighing 90 pounds per cubic foot, a 1 1 2 inch thickness of this concrete weighs about 11 pounds. To float is to apply a cement and sand mix similar to concrete but without rocks, gravel or coarse sand.

If installed correctly seams should not be patched, but sanded smooth. Do i worry about the compound leaking down under the subfloor at the seams. Selfleveling underlayment products can be used on concrete floors, wood subfloors that are uneven but still in decent shape, and even over ceramic tile floorseliminating the task of tearing. Dont try to use a regular concrete mix for the 1 2 inchthick area or over the plywood, rather use a polymer overlay cement rated for that thickness. Start by completely removing the damaged materials. How to install a plywood subfloor on a concrete slab hunker.

Getting a new hardwood floor level do it right not over. Prepare enough concrete to pour a 1 to 2 inch layer over the old floor. Before pouring the self leveler there is some prep work required. Many people think that the new patching material will. I recommend screwing down the metal lath perpendicular to the direction of the plywood roughly on 6inch centers, overlapping the sheets approximately 2 inches. If there are cracks larger than 18 inch in your concrete subfloor, those should be patched and filled with a cement patching compound. When placing an underlayment over metal lath, be sure the thickness is at least of 12 inch to. For many years, the standard option was lauan plywood, also called philippine mahogany or luan plywood, which is made with an inexpensive tropical hardwood, and therein lies its problem. All seams or other areas that are not level must be sanded flat. Concrete subfloors move, shift and crack over time. Then we are laying 2 ft x 8 ft x 2 inch thick rigid insulation sheets between the 2x4s. In a concrete mixer, add cement, aggregate, sand and water as directed on the concrete. In any case, the moisture content of the wood subfloor should be within 4 percentage points of properly acclimated solid strip flooring within 2 percentage points of.

All about subfloors installing flooring over various subfloors. 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. If its a gluedown project over a wooden subfloor, i have scarified the substrate with 16grit paper on a buffer. Click to add item rapid patch concrete repair mortar 50 lb. Floortop stg is a standard trafficgrade, singlecomponent, shrinkagecompensated, selfleveling floor topping and underlayment that may be pumped or poured. Use a circular saw set to 1 depth to cut the subflooring back beyond the damaged areas until you reach solid. Floortop stg is specially designed to smooth out uneven, rough or minor deteriorated interior concrete floors. I need to add a thin layer of concrete over existing, old, weathered and bumpy concrete 1 to 0 on the patch 6. How to prepare a subfloor for tile installation the home depot. In basements and in homes with slabongrade foundations, the subfloor may simply be a concrete slab. Concrete underlayments, installing underlayments, and info on. Be sure to do this in high foottraffic areas of the room. Metal stud base plates should be anchored in concrete every 2 when installing over subfloor panels.

If necessary, add vapor retarder before applying underlayment, especially recommended if 34inch wood flooring is installed over concrete. How to install cement board on a floor the family handyman. If a wood subfloor is laid over an existing slab, the membrane can be cemented to smooth, cleanswept concrete. May 14, 2018 if necessary, add vapor retarder before applying underlayment, especially recommended if 34 inch wood flooring is installed over concrete. Oct 14, 2019 prepping a plywood subfloor is crucial for hardwood or laminate floors that last. I used a scraper and lightly hammered any spots that sounded hollow underneath to loosen any weak pieces. Concrete resurfacing over wood or plywood substrates. Patching compound on plywood subfloor for laminate prep. The experts show how to repair a waterdamaged subfloor. Its what you dont see that is the most important part of a beautiful, longlasting hardwood or laminate floor. The 7 best products to patch wood the craftsman blog. How to patch and level a concrete subfloor pretty handy girl. On woodframe floors, the subflooring provides a continuous structural surface over the floor joists. The product comes in a squeeze tube, and fills and seals cracks in concrete up to 1 2 inch wide.