Sand to level subfloor? - Houzz 3HP Variable Speed Motor very noiseless and powerful. Help! Need to remove uneven self-leveling compound from ... or bigger rise, belt-sand it off with a coarse grit. The in-law kitchen cabinets have been installed. Use a circular saw to remove the subfloor to expose the high joist. How to Level a Floor: 8 Important Things to Know Before ... Since the cause of most squeaks is a loose subfloor rubbing up and down against nails, drive wood screws into the joists below to tighten up the subfloor. Step 4: Level your floor by filling low spots with patching compound and a putty knife. The compound will break out or crumble, with the vibrations from nailing a floor down. Fill in low spots with cementitious leveling compound. Easier to sand down a high spot than fill in all the places lower than it. 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. I had very good success using a method similar to your thought on placing shims over the joists except that I laid down a second subfloor over the shims and drove 6" ringshank spikes through the whole thing, then laid down hardwood over it. Do not sand vinyl flooring - it may contain asbestos. Fix the Problem Spots. Sand down high spots with the sander. What kind of subfloor do you need for vinyl plank flooring? A B. How To Level A Subfloor - Renovation Headquarters 525 views Eric Elford is a premium T&G sub-floor that is engineered for strength, durability and overall performance. Thereof, how do you level a wood subfloor? Good luck with your project, sounds like it'll be nice when it's finished. Make sure to maintain 1/4-inch gaps between the sheets. Cut out and replace any damaged subfloor. 1200sq. Subfloor should be flat and level within 3/16" per 10' radius. Next, combine either one part vinegar with one part water or 1 part bleach with 3 parts water in the bucket. A wood subfloor is easy to level by either sanding off the high spots or adding compounds designed to build up the low spots. After uninstalling the laminate, for the third time, it was time to get to work leveling the floor out so that the boards would install as they were designed to. Prep your subfloor so that it is clean, dry and level within 3/16-inch change per 10 feet. It shows a localized 5/8 to 3/4″ max low point when checking with an 8 foot level in the E/W . Prep your subfloor so that it is clean, dry and level within 3/16-inch change per 10 feet. For concrete slabs: If there are only a few problem areas in the concrete, you can mechanically flatten them by grinding, bead-blasting, abrading, or using . If you are installing vinyl planks over a concrete subfloor, you first need to level or sand any deformities. Step 3 Shave down the higher joist. Professional Wooden. Leave 1/4-inch gaps between all sheets. It means you have to sand down high spots in the concrete or fill in low spots with a self-leveling compound. Because laminate flooring is so thin it offer no structural integrity and bends and flexes easily. Most flooring manufactures recommend no more than 3/16" difference in 4' so if yours is worse than that you could sand or plane that hump down a little but you will have to either remove or set all of the nails deeper so you do not hit them. Nail or screw every 6" along joists to avoid squeaking. Photo 1: Fill and sand the subfloor. Flattening wood subfloor question. Professional sanding machine with Variable Speed motor and integrated dust extraction especially designed for prefinished parquets. My questions is, can I sand down a high spot in the OSB subfloor and not expect issues with adhering the ditra? Repairing undulations: Sand high spots and use a skim coat floor compound for low spots, surface prep product, like Henry's 547 Unipro universal patch and skim coat. - If you are using nails or staples to secure your flooring, do not use the leveling compound—it will crack. 2. If you have alot of high spots I would suggest grinding them. Lump. Remove the baseboards. Tip: Do not try to sand down old vinyl flooring, as it may contain asbestos. Grinding Down High Spots. Ok- depending on how uneven and how much square footage, and with all the "there's zero way a super pro job would do it this way: Once in an old building renovation we used paint. Follow the instructions on the compound and then let it dry for at least 20 minutes. Typically, the floor must be level and uniform within 3/16 inch every 10 feet. Leveling subfloor for LVP install. Fill any low spots with a cementitious leveling compound following the manufacturer's directions and allow it to dry before proceeding. I had very good success using a method similar to your thought on placing shims over the joists except that I laid down a second subfloor over the shims and drove 6" ringshank spikes through the whole thing, then laid down hardwood over it. Proven in the Pacific Northwest, Durastrand pointSIX features a patented taper on the 4-foot and 8-foot edges that is designed to be effective against edge swell. The joist underneath the hump may appear thicker than the joist on either side of it because of moisture. ®. Once dry, sand it down with sandpaper and sweep again. Otherwise, the smells and potential spots will resurface over time. If it's a high joist, remove the subflooring just where the joist is high. 01-29-2013, 06:20 AM. Use a trowel to level the compound as much as possible while it is still wet and pliable. Only use small amounts at a time to prevent quick drying before it is level. Then moisten the floor with water. A grinder can be used to sand down bumps in dried compound. High temperatures, humidity, and steam cleaning can all cause a deep-set stain to show itself even after the surface covering has been treated. You can see all imperfections best in a darkened room. Before you lay any type of flooring, the subfloor should be flat, and if it's plywood, one way to flatten it is to sand it. So some shady contractors replaced a beam that was under the house by coming through the top. You can rent a concrete grinder for $150 to $200 per day. If you need to remove adhesive. The issue is that it takes forever in that it dulls the 80 grit sandpaper in no time, dulled my grinder too, and the blade on my electric planer now needs replacing. Use a trowel to level the compound as much as possible while it is still wet and pliable. When leveling floors made of wood, you'll need to sand down any high spots. Sometimes I am doing a plywood subfloor leveling with a wood edger. Sand from one end of the room to the other, pushing the sander along in a straight line and reversing your direction each time you reach the opposite wall. On the last row of plywood, rip-cut the sheets to fit the remaining gap, leaving a 1/4-inch gap around the wall. His crew puts water on the floor to find the high spots. High Spots: Use a sander to deal with high spots. Check your subfloor to make sure it is level. Mix some Cement-All with water, (Cement-All is a high grade cement that is used to fix driveways and stairs, and sticks very well to old concrete, but it must be clean) and fill in the holes with a spatula or trowel. Screw the wood shims into place on top of the joists with a drill and screws to bring the low spots up to the same height as the high spots for an even installation area for the subfloor material. High Spots and Bumps in Subfloor If you need to bring down your subfloor, you can try either a hand plane or a power sander. If significant wood material need be removed, a $70 electric planer will chew it up like nobody's business. Use a self-leveler on low spots and / or sand high spots of wood or concrete. In either case, the leveling process will be similar to what herein follows. I and getting ready to install 3/4″ Oak Hardwood in my master bedroom, over a 3/4″ plywood subfloor. In my previous videos you can find some tips on how to level a plywood subfloor with grin. In many cases this is logistically easier than . floorguy 12 years ago It was in the Kahrs original, floating wood flooring instructions, to use sand as a low spot filler, under the underlyment. The high spots should be cut down with an electric planer, setting nails first with a quarter inch punch and hammer so the blades don't get chipped or an edger with coarse sand paper. Plane or sand high spots using a wood planer or hand sander. When particleboard gets wet, it can swell or even disintegrate. Note: You can also use a belt sander and/or a floor sander to remove high areas by sanding the subfloor itself. Deflection is measured using your 6' level and laying it (centered on the high spot) and holding one END of the level to the subfloor. You want the joist at the same height as the other ones. Clean everything off the floor. Instructions Remove the baseboards. Most flooring manufacturers allow a slight variance for their product, so you may not need to do much work to get the floors ready. Prime floor if needed with IVC FLEX-PRIMA Acrylic Latex Primer to prevent over absorption of adhesives, dust containment, and to ensure a better bond of the adhesive to the subfloor. 1200sq. If the subfloor is plywood or particle board, start by screwing down any loose boards or plywood sheets. If you have a drum sander on hand, this can level out any bumps in the subfloor, but you need to have a steady hand to control this. After hemming and hawing for an hour, the . If the floor is exposed to rain and or humidity, the tapered . Do not sand vinyl flooring - it may contain asbestos. Plane down the joist and replace (put back) the subflooring. Place it at the highest spot in the floor and slowly swing it around in a 360 degree circle. Sand or Level Any Deformities. Alternately, use a magnet to locate screws, then dig them out with a cold chisel and hammer, then unscrew the cement board from the plywood. Is there a quick, low-cost way to do this? Attached is a partial mapping of the current subfloor flatness in a corner of the room (the closet area). We are creating an in-law suite in our basement and ripped out all the carpet. Back to addressing the high spot. Repairing undulations: Sand high spots and use a skim coat floor compound for low spots, surface prep product, like Henry's 547 Unipro universal patch and skim coat. On the last row of plywood, rip-cut the sheets to fit the remaining gap, leaving a 1/4-inch gap around the wall. What we found is that one technique is to pull up the subfloor and shave down the top of the joist. Step 5: Use a belt sander to reduce high spots. The low spots will be readily visible under the straightedge. Lowell Brakey, a Kansas concrete contractor, has developed a slick way of doing this. A combination of grinding, sanding, and using a self leveling material will get your floor level for proper installation. Look for areas where the level doesn't lay flat to identify high and low spots. Remove molding and baseboard at the edges so you can get the plywood close to the walls. Tim, I had a similar problem in my house with the entire first floor,(approx. ft.) except it dipped in some places as much as 2.5"! Can I use floor leveler under hardwood? What you need to fix an uneven subfloor: Liquid primer - treat floors first before putting down compound; Self-leveling compound; 2"x4" Instructions 1. Or, you can cut out the subfloor, notch the joist below to make the sub floor above flat - but this would weaken the joist a bit. One great tool that works well to remove minor high spots is the use of a flooring edger. Also look for high spots, especially at seams. 5 months ago. Concrete subfloors must be fully cured, at least 60 days old, and should have minimum 6-mil polyfilm between concrete and ground. Examine the floor closely for nails or screws that are loose. How much are you going . Manufacturers use particleboard because it is less expensive than plywood. Paper Shims and Plywood Strips Minor high spots for hardwood and laminate floor installations are easily fixed with tar paper shims. Leave 1/4-inch gaps between all sheets. • Any unevenness of more than 3/16 inch over a 10-foot span (5 mm over a length of 3 m) must be leveled . Repeat until all of the floor is gone. Use a self-leveler on low spots and / or sand high spots of wood or concrete. If a 4-ft. straightedge shows a 1/8-in. 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. The floor feels solid otherwise. Use leveling compound in areas where the dip in the old flooring or subflooring is 1/4 inch or more. Make sure to maintain 1/4-inch gaps between the sheets. Most wood subfloors are constructed from plywood or particle board. Steps for Leveling a Subfloor. Particleboard is a composite wood that is used to construct furniture, door cores, floors and cabinets. This will cause some humps in the final sub floor itself and should be corrected to insure you don't have a see-saw effect in your home. … Plane down slight high points of joists with the planer. Lowering high spots: To lower high spots in the subfloor you will have to remove the subfloor and then using a plane or use a belt sander to remove some of the wood from the floor joists. I have some high spots on my OSB subfloor that after moving my 6ft level around I see it would be far better to remove or reduce the high spot rather then to put in a filler around it. Do not sand vinyl flooring - it may contain asbestos. Floor Sanding Machine AVANTIME SANDER Ideal for prefinished parquet. You'll need to know how to level a floor: Just sand any high spots and fill the low spots with leveling compound. Step 1: Determine and mark high and low spots across the floor. Now, use the circular saw to cut along the next joist, so you can lift out another strip of plywood/cement board/ self leveling. In our case, this occurred in a particularly uneven spot near our The KIESEL Servoplan S444 needed a diamond grinding stone and an angle grinder to remove the high spot. All high spots that don't meet a 1/4-inch-in-10-foot tolerance have to be removed. If you are nailing the hardwood floor in place, choose cementitious leveling compound that you can nail through. Use a self-leveler on low spots and / or sand high spots of wood or concrete. Make sure you follow manufacturer's instruction, and perform a moisture test after it has dried, to prevent cupping with your hardwood flooring. It gives information on the subfloor situation covered in this article, and the steps required to level a subfloor without taking up the existing subflooring material.

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