sanding subfloor seams

Have 2000 sq ft of 3/4 hardwood going in Tuesday. 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. Blocking is the use of a piece of wood, such a short length of 2x3 or 2x4, to stabilize the flooring at a joist. Tip: If the guide on your recess scribers is too thick (fig. If wet sanding, be sure to clean out the sponge frequently and wet. When you paint a plywood subfloor, seeing the seams between the sheets of plywood are part of the look. A fully sanded surface and precision tongue and groove profile help eliminate visible seams while keeping tack strips firmly in place. In other words, this seam is raised and it runs all the way from one wall to the other. A subfloor warms finished floors by 6°F (3.2°C) and provides protection from moisture. a) it could remove adhesive from the subfloor when scribing the seam. Wet sanding consists of dabbing versus a sanding motion all-together. I can’t sand it down because of the thin veneers. Two layers of 3/4" B/C exterior grade. Read This for More on Wet Sanding Drywall. It is OSB. Use full sheets when possible. I want to level it so I can then lay a foam backerboard and then tile over. To do this, measure and cut the plywood to fit your room. Step 2 – Carefully measure the size to cut the new subfloor plywood. (This will prevent any squeaks at the seams.) DETAILS The 2x10 joists 16" o.c. Maybe you already know a little bit about home construction and flooring, but it's a term not all homeowners are familiar with. 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. Sheet vinyl flooring provides a durable surface for high-traffic areas in your home. It went on easily and I was able to sand it perfectly smooth. Thoroughly vacuum the existing floor, and use a long floor leveler and tape measure to ensure the subfloor is level within 3/16 inch for every 10 feet. The unsupported span is 10'. As the floor board is installed over this raised area, the board follows this contour. Wear protective goggles and a dust mask. The builder says the installer is exagerating.They crown at all the joints in both directions. By renting one of these, a floor sander. You should however fill in any holes and gaps in the wood with wood filler. Floor Prep - Wood Sub Floors . Sanding of the thickened area should be delayed until the panels have dried. Sand the peaks down. My flooring installer is claimimg the subfloor seams are terrible. The plywood grain of both the 3/4" subfloor and the 3/4" underlayment will run perpendicular to the joists. If subfloor prep work is required, “hills” should be sanded down and “valleys” filled with an underlayment patch, developed by a reputable manufacturer for use with hardwood flooring. After filling the holes and seams, you are ready to sand the floor. When you are dealing with uneven floors, one option that you have is to use self-leveling compound. Lightly stagger end seams. Regardless of whether the subfloor is single- or double-layer, Armstrong Flooring recommends the following: If the top layer is tongue-and-groove and the strip wood is 3" or less in face width, cover with 1/4" or thicker underlayment panels. Do not sand sub-surfaces such as vinyl or synthetic tiles that may contain asbestos. Before we talk about subfloor mold, let's explain what a subfloor is. It is an alternative to screwing at an angle through the joist into the floor, mentioned above. Sanding the subfloors December 14th, 2013 So before we start dust removal, we create some of our own. Gaps & Seams of Exterior Deck Subfloor. First, sand up and down and then side to side using strong, even pressure. Use a special sanding tool. 1. Floor preparation equipment for floor and subfloor sanding and grinding. Sand With Smooth Side of Sponge . We needed to sand the joints on the subfloor before we can install the wood floors later and what better time than when the house is already full of dust and it got a lot of the drywall mud off the floors. B ut they are supported at 10'. Fill with wood filler. Slide joints and ends offset at least 6″ from existing subfloor seams. Arrange the plywood on the first layer of wood. When you install your vinyl on a wood subfloor, the top plywood should be a minimum of 1/4″ thick. ... Before I seal and recoat the flooring with a protective layering I need to make sure the gaps/seams are filled between each board and I also want to correct the 1/8 inch height gap difference from the old plywood to the new plywood. This is best done with a flooring sander. are 12' long, and run lengthwise. This will reduce the visibility of seams after painting. This is not the case with regular plywood, which requires a piece of 2-by-6 cut to fit between the joists and nailed in place to brace the seams between pieces of plywood. After it was dry, I sanded the patches smooth. Sand drywall patches and seams can become a very tedious project, but one thing that’s for certain is you don’t want to oversand. This compound can potentially be utilized on a concrete slab or a wood subfloor, and it works well when you are dealing with dips in the floor. For most subfloors, you will need to add an extra layer of wood. Subfloor surface should be cleaned of all oil, dirt and debris. This is where you begin to feather the joint compound outward from the joints. LAYOUT. Secure all of the original existing subfloor to the new supports with glue and screws. These subfloors must meet structural requirements. For drywall sanding, you'll need a hand sander, a package of 150-grit drywall sanding paper that's precut to fit your sander, and a sanding sponge for corners and detail sanding. The prefix “sub” means under, so the term literally means “under floor.” Household floors usually have two … Avoid Oversanding. Once your subfloor is in place inside the van you’ll need to secure it to the metal cargo... 3 Fill and sand screw holes. Caulk seams.. Self explanatory. Butt factory edge to factory edge. Step 10 Then we covered the entire floor with #15 felt paper and installed hardwood flooring over the new plywood and the existing flooring. Sanding may be necessary to correct any uneven joints. Wipe away the dust every few minutes, or use a hose attachment to vacuum it away. Other issues might develop over time as the floor is walked on, creating micro deflection with use. What's the optimal distance from subfloor seam to underlayment seam? When I was preparing our kitchen subfloors to lay new flooring, I used this to patch several dents and it was great. Lightly sanding the panel edges to remove the ridged area is common field practice. The primer and paint will settle into the seams a bit, but for the most part they will be visible. Offset underlayment end seams by 18″. They are noticeable but I dont really know what bad is. How does sand form? the tan color of most sand beaches is the result of iron oxide, which tints quartz a light brown, and feldspar, which is brown to tan in its original form. Use only medium to fine sandpaper... 4 PAUSE. I have an unlevel bathroom plywood subfloor with some seams in the plywood. Undecided about the best way to cover and warm up the concrete floor in your basement? Sanding a Plywood Subfloor. This method is most effective for squeaks between the floor joists... for example, when seams in the subfloor are moving against each other. This is what I would recommend for preparing your subfloors for paint. Use it to sand thinset the same way you would use a sandpaper-wrapped wooden block. Sanding the bottom of the guide on the recess scriber to reduce its thickness (fig. Step 3 – Lay new plywood subfloor into place. Apr 09, 2020· once they make it to the ocean, they further erode from the constant action of waves and tides. Air gap subfloor panels elevate and insulate your finished floor quickly and easily. Tongue-and-groove edges on plywood make the subfloor strong, as if a single piece of plywood was fit over the entire floor. I recently bought an used house (20 years old) and after removing the carpet in the living room, I found along one particular seam of the subfloor (I think it’s plywood) the edges are cupping. A black block is basically a shaped chunk of lava rock. Understanding the Upgrades: Enhanced Plywood and Subfloor Products. The flooring edger knocked down about an 1/8" of an inch at the plywood seams (1) where #30 roofing felt was used (2) to bridge the low area with standard #15 felt paper rolled out prior to the installation. We ran an edger (you can also use a big machine) over the seam where the plywood met the old subfloor to create a smooth transition. Self-leveling Compound. Subfloors should be fl at within 3/16” (4.8 mm) over 10’ (3.1 m). Do … How to Prepare a Subfloor for Vinyl Flooring. Subfloor mold. This step, especially with pre-finished flooring where no sanding will take place after install, is important so there is no visible telegraphing of the raised edge. As with most remodeling tasks, having the right tools is the key to a top-notch job. Step 4 – Secure new subfloor … This weakness in the subfloor will cause sanding machines to vibrate during sanding, and could lead to chatter marks. Taper any remaining low spots with shingles or layers of roofing felt. As referenced in OSB-4004 and APA Subfloor Preparation Guide (V440), builders may find it advantageous to remove this slight ridging by sanding along the panel edges. With OSB, it is the seams that peak up if it is allowed to be rained on, before the building gets dried in. 2'x2'x7/8" panels press-fit together, requiring no nailing, gluing or fastening. These seams must be sanded flat to make the sub-floor a flat plane, suitable for the new floor. Floor sanding machines, tools and consumables including the Wirbel Candia C43 floor preparation machine with compatible grinding heads and diamond floor pads. You'll need to know how to level a floor: Just sand any high spots and fill the low spots with leveling compound. Wring out the sponge, then remoisten it and switch to sanding with the smooth side of the sponge. 2 Attach subfloor with screws. b) will prevent this and will also help to keep the guide clean and free of adhesive contamination. 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