How can i pour a concrete floor over a particle board subfloor. I was terrified to pour self levelling cement over my kitchen floor but after reading a ton about it online i did it. For more detailed instructions and for tips on how to repair. Meadows is a selfleveling floor topping and underlayment that may be pumped or poured. Floortop stg which has been colorenhanced should be sealed with a 100% all acrylic sealer designed for architectural concrete, such as decraseal wb from w.
What is the best subfloor to put over these old boards before using hardiboard, thinset, and tiling. How to install concrete floors over plywood subfloors. Im just focusing on patching the subfloor in this post to keep it simple. Surecretes micro topping is a single component thin concrete overlay that is a selfbonding cement based, for interior concrete surfaces.
The wood subfloor must either be solid hardwood flooring, a minimum of. Sealing floortop stg will increase trafficwearing service life. Pour out half a 5gallon plastic bucket of micro topping polymer base liquid. Making concrete subfloors suitable as a finished flooring surface. Sleeperconstructed subfloor consists of wood subfloor installed over or on an. Common gray concrete, chemically stained and sealed. Concrete resurfacing over wood or plywood substrates duraamen. Shop surface preparation in the flooring section of. Because microtoppings are so thin they are not selfleveling. Additional bracing or stabilization may be needed, especially on exterior raised decks.
Installing a subfloor is a diy job you can achieve with the right knowhow. Floortop stg is not suitable for wet, submerged, or similar environments. They are easier to work with, but still provide a solid foundation to support your hardwood floors for years to come. Please send us information regarding the proper chemical to use to achieve the proper mix for the lightweight concrete. To help you start your installation project off right, here are a few tips for preparing your subfloor. Spread the leveler over the floor with a trowel or a gauge rake so it covers each low area completely. For the ultimate strong, smooth finish over concrete, precast, steel deck, wood frame, and old cracked lightweight concrete, specify commercial topping. Get fair costs for your specific project requirements. If you have any questions or maybe some good tips, leave them in the. However, if the surface is colored using a dyes or stains or any other concrete micro topping or covered with. How to level a subfloor to prepare for new flooring. The experts show how to repair a waterdamaged subfloor. Nov 25, 2008 decorative concrete overlays over a wood substrate.
Use a framing square to mark lines to create a nice square or rectangular opening. Ardex liquid backerboard over wood subfloor to allow stained. Installing concrete overlays over a wood surface is tricky but it can be done. 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. Better to stop it before it gets there than trying to seal the wood.
Nailers put down in it, concrete between them and wood nailed down over it. Micro toppings can be used on top of selflevelers to enhance features and details of selflevelers. If additional force is needed, always use a block of wood against the groove edge to minimize damage to the panel, and always allow a 18inch gap between panels. Installations over gypcrete the purpose of the information is to outline ideal flooring options and applications over gypcrete. The process will depend on the type of subfloor and the nature of the problem. How a microtopping can smooth a job sherwinwilliams. This method of laying a sturdy subfloor on top of joists and then topping the subfloor with a cosmeticonly flooring top creates a tighter, stronger structure. Surecretes just add water overlay products include, broom finish, micro topping, spray texture overlays, and spray wall overlays and stamp overlays. Utilizing control joints along long seams or large areas is important.
With a tradition of uncompromising quality, ardex offers highperformance, innovative, fasttrack solutions designed with the installer in mind. Subfloors and underlayments subfloors and armstrong. Spread the mix evenly over the surface with a wide cement. The surface over which the microtopping will be applied must be dampened and then using a squeegee or steel pool trowel start applying the material. Fixall is the former brand name of one such product now known as fixitall. This product is simply mixed to a pourable consistency, poured over the floor surface and allowed to find its own level. Pour a generous amount of mixed leveler onto the subfloor, focusing on one or more wavy areas. Concrete over a plywood subfloor with 16 on center floor joists. Cementbased microtoppings and skim coats can be used both indoors and out to provide a clean canvas for decorative treatments, such as stains, dyes and stenciled patterns. Double layer wood construction over joists or trusses on up to 19. Let us help you stay at home, shop online and well deliver. While concrete is a strong construction material, it can still crack. Apply a second coat, if necessary, after the first coat sets. Installations over gypcrete lumber liquidators flooring co.
Concrete resurfacing over plywood substrate duraamen. How to install concrete floors over plywood subfloors seattle. The first step is to put some dead wood underneath the hole so you have a way to secure the patch. Patching compound on plywood subfloor for laminate prep the. Apr 28, 2016 going over cracked, loose, crumbly gypcrete is not a good idea. May 05, 2015 i wanted a vent in the pantry so i moved the hvac ductwork over about 18. My steps for successful prep over a wood subfloor wood. How to fix a spalling garage concrete floor home guides. Multicoat microtopping installed over indoor wood subfloor. Subfloor prep installation faqs armstrong flooring.
Count on our patches to eliminate flooring installation problems associated with disbonding, crumbling, mold, mildew and staining. How to install a subfloor video bunnings warehouse. Commercial topping poured from a featheredge to 3, in new construction or renovation projects. Sep 07, 2011 multicoat microtopping installed over indoor wood subfloor. This video demonstrates the installation of selfleveling concrete over plywood substrates. Microtopping was designed to yield an exceptionally smooth tighttroweled finish that can provide a new blank canvas for decorative concrete floors. Vinyl is one of the few types of floors that can be safely installed over concrete, wood, or other solid floors. You can achieve a more random look with a slop trowel application method. For the second story a foamed type of lightweight concrete is being used over plywood for sound absorption between floors. Micro topping treatments are made with very thin layers, no thicker than 18 inch, of polymermodified concrete containing sand and are applied with trowels or brushes, depending on the final look desired. How to replace repair rotted sub floor, rotten floor. Do you have a damaged concrete slab in desperate need of repair and resurfacing. Installing overlays over wood surfaces the concrete network. Some systems come pretinted in a wide range of colors, while others can be custom tinted by mixing in the desired amount of liquid coloring agent.
Readytouse, latexbased product used to fill cracks, fastener or knot holes and level low areas in plywood subfloors or concrete surfaces. Flexible properties one of the advantages of micro toppings over selflevelers has to do with water. Next, cut a piece of flooring to match the opening. Thin concrete overlay micro topping mix tight troweled by. The best material for filling gaps and depressions is patching compound.
Commercial topping gypsum floor underlayment maxxon. We are building a 2story condominium complex with concrete slabongrade. Replacing with a new solid subfloor with the proper materials is key, you have many options. Difference between subfloor, underlayment, and joists. Patching and repairing subfloor at charlottes house. Lets go over some of the key aspects of complete wood subfloor prep. Achieves compressive strengths of 4000 to 4500 psi and pours over vat, vct, terrazzo or ceramic, with no shotblasting required.
It has been compromised and is flexing, thus the cracks. Decorative concrete overlays over a wood substrate. The first step to proper installation is to get the subfloor in order. Commercial topping, an ecofriendly building product, is an ideal solution for sustainable building projects. Over time, a sink or refrigerator water leak can damage and even destroy flooring materials and the subfloor below it. Jan 21, 2019 because micro toppings are so thin they are not selfleveling. Should i put a membrane between the concrete topping over. After this sets up, we apply the microtopping or stamp mix to the required depth. Tile and grout are not waterproof and if exposed to water regularly the water will work its way into the subflooring. When dry, the micro topping will be smooth and white. Directly below your feet is an ingenious method of flooring that has been used for centuriesand is still employed today. The continuous space of microtopping ideal work microtopping is perfect for those who want a continuous, innovative and tactile surface that can make any space unique, whether it is a minimal modern environment where ideal work microtopping stands out as the main feature, or a classic, rustic or vintage environment, where it completes the style with refined discretion.
Patching compound on plywood subfloor for laminate prep. How to choose the right subfloor leveling techniques. These subfloors consist of lightweight concrete or gypsum based topping over plywood on wood joists or trusses. You only need screws long enough to go through the sub floor and the 112 2x4, any longer will be okay, but not necessary as it will not grab wood. Find quality surface preparation online or in store. Tips on installing ceramic iile over concrete, wood, and existing tile. Consists of wood subfloor installed over or on an existing concrete subfloor on or. Concrete underlayments, installing underlayments, and info on. 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. Dec 26, 2016 i made this video to show the process i use to cut out and repair and broken, damaged or weak section of plywood subfloor. See typical tasks and time to repair a subfloor, along with per unit costs and material requirements. If the wood patch is about an 18 smaller than the opening, that is okay.
Micro topping was designed to yield an exceptionally smooth tighttroweled finish that can provide a new blank canvas for decorative concrete floors. Learn how to install a subfloor in this step by step guide from bunnings. Concrete on or below grade will have some moisture in it due to its proximity to the ground. Subfloor surface when installed over underflor when directly adhered to subfloor suspended wood subfloor over joist single layer sturdifloor rated panel 2332 double layer construction, minimum 1 thick. Microtopping can be used to repair old concrete surfaces. I have found that subfloor prep is time well spent.
Find out how concrete floors are installed over a wood subfloor. Its best to place the underlayment over 34inchthick plywood fastened with screws at 12 to 16inch intervals to help decrease deflection and add stability. Commercial topping is an ecofriendly building product, and is greenguard gold certified. Surface repair options for concrete floors and subfloors. Damaged concrete floors and subfloors can be repaired using a few different options, including. Micro tek micro toppings are commonly used on countertops or floors where an acid stain is desired, when the concrete itself is too abused to allow for a pristine surface. Pavimenti in microcemento e rivestimenti microtopping. The first coat ensures uniform hydration of the second coat. Microtopping is a cementbased resurfacing coating that can be applied quickly and easily to indoor and outdoor concrete tiles and flooring, as well as walls.
Its not as simple as just ripping it up and starting again. Rough grade is available in natural, while smooth grade is available in white and gray. Concrete floor video on how to install concrete over an existing wood subfloor. The wood flooring system must conform to the requirements. Gypsum concrete is a building material used as a floor underlayment applied over wood subflooring and concrete. Typically you can see where the nail line is on the subfloor, but obviously a stud finder can work too. I prefer solar panel colored roofs, orange and blue. Their main purpose is as a thin topping to level, smooth, or fix imperfections in concrete. Overlap adjacent pieces of lath mesh approximately 2.
It is flexible, it can be changed out, it is inexpensive. Easily patch, repair and skimcoat indoor surfaces with easily patch, repair and skimcoat indoor surfaces with the henry 547 unipro 25 lbs. Patching compound on plywood subfloor for laminate prep discussion in floor preparation started by bhigg01, sep 27, 2014. This can be a integrally colored microtopping or one you can stain or dye. Because micro toppings are so thin they are not selfleveling. Tizard recommends letting your patch and repair dry thoroughly dry before applying the micro topping. This will allow the two areas of the floor to meet up at the same height.
They also dry very quickly, so the final texture is limited to how the microtopping is applied over the concrete floor. Horizontal and vertical concrete overlay bag mixes. Jan 26, 2020 when installing a new subfloor, its easy to avoid gaps by simply butting the subfloor sheets as closely as possible before fastening them. Jul 15, 20 ardex liquid backerboard over wood subfloor to allow. Surecretes preblended overlay bag mixes provide the widest variety of design and application flexibility.
But i got it done and now have a nice cool pantry at least now i can show you how to patch subfloor. Ive seen guys take grayish stains to give it a blotchy, concrete or stone look and its quite nice. See concrete, floor fills, underlayments and toppings e. Renews your surface in only 3 millimeters in only three millimetres of thickness, with micro topping it is possible to renew existing surfaces on different substrates concrete, selfleveling, ceramics, wood, etc.
Should i put a membrane between the concrete topping over plywood subfloor. Use nongypsumbased repair materials whenever possible. See professionally prepared estimates for subfloor repair work. Subfloor preparation patching compounds with the launch of ardex feather finish nearly 30 years ago, ardex was established as the leading provider of highquality patching compounds. I would not be surprised to see that the crack had followed a seam in the plywood or decking in the sub floor.
The product will seek its own level much like water, but it must be spread initially to cover the affected area and not pool in the center. How to patch wood subfloor surrounded by gypsumgypcrete. To determine the gypsum underlayment depth, core the floor by drilling through the gypsum until the wood subfloor is detected. A microtopping is a cementitious product that is normally used as a solution to repair old cracked concrete. It fixes directly to the underlying concrete, giving you a highly durable result that enhances old and new surfaces. Its important to level a plywood or wood subfloor before you install any kind of floor covering over it, or bumps and unevenness can create problems. Your 12 subfloor underneath is going to deflect and then crack your finish tiles. The treated surface can cure in a day, and usually can be walked on within 36 to 42 hours of being applied. Concrete resurfacing over wood or plywood substrates. If the subfloor is 58 or 34 you can probably apply tile directly to it with no problem. What is a sleeperconstructed subfloor and why cant i install flooring over this.
If the floor is level along its perimeter but there are interior dips or waves that span about 4 inches or less, then putting down a thick plywood underlayment should span and effectively bridge the depressions. How to prepare a wood subfloor for a hardwood floor installation wood subfloors are the preferred type of subfloor for solid hardwood flooring installations. 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. If you really want to stop moisture from getting to the subfloor then a membrane under your tile would be better than sealing the osb. With wood floor, you generally have to remove more than what you need to patch before you start laying new pieces.
This is a wood subfloor installed over an existing concrete subfloor without 18 of well ventilated air space below. Sandblasting is often used to achieve the look of a stencil. Do i use the patch in the gaps between the plywood sheets. Learn how to apply it and what the advantages and benefits are. Find out how concrete floors are installed over a wood sub floor.
Use a trowel or squeegee to spread it over your floor. It works best on inside applications and horizontal surfaces generating a smooth neat surface that otherwise will be almost impossible. It is ideal for leveling larger areas, and can be used over. Should we add another layer of plywood with shims on top of the current subfloor to level it. If you have a hump in a wood subfloor, you can sand it down with a sander. Be sure the patch material is the same thickness as the subfloor. The floor patch and leveler will remain flexible allowing the plywood subfloor to flex without cracking the filledin areas. When i ventured out into business for myself in this trade, the first thing i purchased was a highquality moisture meter that can be adjusted for different species. You dont have any control over a subfloor that you just uncovered by removing carpeting or some other flooring, however, and its important to fill existing gaps to guarantee thermal and moisture insulation and protect your new flooring. Temperature changes, heavy weights, and dropped objects can all damage your concrete floor by causing cracks and holes. This underlayment sets in 2 hours and can be used on concrete, wood and metal flooring as a featheredge, deep fill or embossing leveler. Frankly, stacey, the thought of a concreteoverwood floor frightens me badly. Tizard recommends applying one coat of micro topping, letting it dry thoroughly, and then applying a second coat of micro topping.
It pours over vat, vct, terazzo or ceramic, with no shotblasting required. You can pour gs4 up to 2 inches to repair the gypsum, then look at getting a cementbased topping to trowel over top, or pour a leveler very thin across the top and stainseal it. Ardex underlayments and concrete patching dci flooring. Traditional latexmodified or gypsum based underlayments will crack along joints.
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