Can I use self leveling concrete to flatten subfloor? Has anyone here ever used (or heard of using) sand to level a floor to lay down hardwood? cimmaryn. It is composed of large wooden flakes or … If you vacuum, use only an industrial-type vacuum. 6.5mm. Pinpoint and notate the specifics of any gaps that exceed 1/8” over a six foot radius. Using shingles to flatten concrete subfloor. Each of these tools can be rented at most home improvement stores, and can help to make your wood subfloor level. The sub floor is kind of messed up. Use a long level and tape measure to check that the floor is level. For background informa-tion on buckling of panel sheathing, see APA Technical Note: Buckling of Wood Structural Panel Sheathing, Form D481. There is a slope towards the hallway and kind of a “bump” at the other end. Check your wood flooring manufacturer’s recommendations and sand any high spots with a concrete grinder. Also, the plywood subfloor is only 1/2", which is smaller than the minimum for Ditra, which I was planning to use … It's used to help insulate, absorb sound and reduce wear on your floor. I had heard years ago that it works well. My planet has a long period orbit. Fine sand mixed with Portland cement works well to help build up low spots on concrete floors that are 1/8-inch or deeper. Also, patch any deep holes with concrete patch and allow it to dry. We talked about trying to flatten out the area in the kitchen in relationship to itself and flattening the entrance area separately (so they’d each be flat but on entirely different planes). Typically, the floor must be level and uniform within 3/16 inch every 10 feet. If it has been drum-sanded eight times already, you’re probably walking on rice paper now. For that reason, any subfloor filler you use does not have to be particularly elastic. Framing, Flooring and Sub-Flooring - What to use to sand down subfloor - I am putting in laminate and need to flatten my subfloor. Shimming the subfloor is a common method to flatten to required tolerance. When furnace I’m not sure I can sand it down enough either, since the subfloor is only 3/4” OSB. Make sure the caulk is level with the wood. Has anyone used sand to flatten a subfloor. A: High areas, such as peaked joints in the subfloor or other ridges in the wood subfloor can be power-sanded or planed. Depending on the situation, you can either sand down areas of the subfloor that are too high, or install shims beneath the subfloor so that the entire floor is brought up to the same level. A subfloor is meant to be flat and level. Using a truly straight (This in itself could be a monumental problem. Solid Hardwood, Engineered and Laminate Flooring - How to flatten plywood subflooring for laminate? Pourable self-leveling products help to flatten and level a wood subfloor or a concrete slab before the tile is installed. When laying a paver patio, it’s important to start with a firm base composed of compactable material, such as crushed limestone, topped by sand. If you're gluing the flooring down, you can use a cementious patching compound. OSB, or oriented-strand board, is an engineered wood material sold in sheets like plywood. Use only medium to fine sandpaper grit so you don’t sand too much off your wood subfloor. Should I let it air dry out or (because it’s such a small section) use a skill-saw to cut out the exposed areas of plywood and replace with new pieces? Asphalt shingles work really well to fill low spots in wood floors when you're installing 3/4-inch traditional hardwood flooring that will be nailed to the wood subfloor. Check to see the maximum permitted thickness of your compound. How to Sand OSB. It will probably be cheaper to rent a sander than to buy one. Standard specifications for subfloor flatness range from 1/8” of an inch in a six foot radius up to 3/16” of an inch in a ten foot radius. Lay it on the floor and have a look at the edge of the subfloor. Anyways, what do you guys think my plan of action should be? A guy at HD mentioned this to me, and it seemed like a good solution. Yes, sand down those butts and joints and any high spots. Probably the most common method of shimming is using underlayment material to build slight elevation gains. Subfloor materials including plywood, oriented strand board and, to a lesser degree, particleboard, are fairly stable, and any gaps that might develop between sheets are unlikely to widen. If there is any grease, you’ll need to use a degreaser to remove it before leveling. These conditions will … When we’re done it’s almost like concrete. For this reason, when you are preparing your bed for pavers, it’s critical you compact the bottom layer of dirt or soil before you put down a layer of sand for your pavers. You may have to fill a hole with filler a second time after the initial sanding. Laying a paver patio makes a great DIY project that can improve the look of your yard and increase the value of your home. I’m installing Shaw Floorte Pro 7 Series resilient flooring. The quality product we use can be poured from any depth between 1.5″ to a smoothed-out feather edge, making it a suitable choice for preparing just about any subfloor for its new flooring. I am installing (floating) 3/8" engineered hardwood over a concrete subfloor with 1/8" underlayment. I have a few concerns 1) Will the subfloor dry out adequately under the bottom plate (since they are sandwiched together)? How to compact sand for paving. Can some of you guys tell me how to go about leveling a 3/4" osb subfloor? Shimming may consist of many variations in technique and a multitude of products to achieve the same goal. Use an underlayment, floor leveler or floor patch product to fix low spots in a wood or concrete subfloor.. An underlayment is a thin layer of material sandwiched between two other materials. Work slowly, and check the floor with a level as you work. If I lay roofing felt to that thickness I have found that it makes noise underfoot when compressed. When the laser screed or ready-mix trucks drive across it they won’t even leave tracks. Using a pen or a marker to write directly upon the existing subfloor or upon masking tape if preferred. the floor, and fasten the subfloor to them with screws or nails as necessary to flatten panels. Fixing grade on concrete garage floor? I was never able to find a self-leveling compound that was approved for use on plywood or OSB. Sanding the subfloor can remove minor swells or high spots in the wood, but any low spots in the floor must be filled in order to level the plywood. Vacuum the subfloor and make sure that all debris, no matter how small has been removed from the surface of the subfloor. The easiest way to check the flatness of your subfloor is by using a straight 2x4, about 10 feet long. You said you have a basement so I assume it is a plywood or OSB subfloor. Sand away high spots using a belt sander or flooring edger. Hot Network Questions Can flint be obtained from gravel that a player placed when it is mined? - Hello, I have installed laminate flooring in 2 … Low areas that are less than 1/4-inch deep can often be filled with building paper. Self-leveling cement is a great asset when creating a truly flat subfloor and is … Is there any way I can flatten it? If stapling/nailing, you can layer up asphalt felt in 15 or 30 lb. Yes, but you need to look at your floor’s history a bit. Cupped planks will flatten as they dry unless they have splits, so wait for them to stabilize.The time to refinish your wood flooring is after it’s flattened as much as it will.If you sand off the cupped edges before it flattens, you could end up with a scalloped floor in winter after it dries. Wall grout that has no sand works fine for shallower depressions. Tip: lightly spray with water using a plant spray bottle to reduce flying dust. Active 1 year, 4 months ago. 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.This problem can be fixed, but it all depends on exactly what kind of uneven subfloor you have. From what I understand, it can only be used on a completely solid surface like concrete, because the flexing of a plywood subfloor would cause it to crack and/or lift. Ask Question Asked 1 year, 4 months ago. Q: I have a plywood subfloor with a few high/low spots. How To Prep a Wood Sub Floor. Using shingles to flatten concrete subfloor. 1. Viewed 194 times 1. Sand to level subfloor? Using metal pipe and a screed board to even the sand base for a paver patio. Gravel and sand compacts best with a drum roller or a vibrating plate compactor. I’ve read that laminate flooring can only be installed over flat subfloors. Can You Use a Coarser Grit for Problem Floors? 11 years ago. Also check the subfloor for squeaks and refasten as necessary before installing the Underlayment. Carefully vacuum all sanding … In order to properly install hardwood floors, the plywood subflooring must be even, or level. It's not a big bathroom by any means, but there is a large high spot in the middle of the bathroom over one of the joists, too high to just plane or belt sand down I would say. please list all available material you know of for doing something like this, so far I have heard of 15lb builders felt. Not only would I advise against sanding, I would advise you to lay down all-new floors! Using caulk, fill the seams present in the mosaic layout of your subfloor. So, I would like to shore up the two areas (about 12-15 inches by six feet each. The sand would go down under the underlayment (15# felt). “We use an 8-ton rubber-wheeled drum roller,” says Lloyd, “and compact to 98%--both the subgrade and the subbase. I am cosidering istalling a kahrs linnea engineered wood floor and the tech support said I can use anything non conpressible to flatten the osb with. Hardwood floors add style and a distinct look to a room. I have raised the low spots, now I … Prepping Subfloor for Luxury Vinyl Flooring, Vinyl Planks, Sheet Vinyl, Peel & Stick Vinyl. It’s LVT. Specifically compacting sand is tricky due to its granular composition. This long stretch of wood should uncover any uneven spots, including dips, hills, and gullies. 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