Posted by. The direction of the floor joists determine the orientation of the subfloor. We have pine tongue and groove planks that sit directly on the joists. If you are worried about the floors being too thin to sand, or they're nice and flat … To avoid buckling, subfloor panels should be spaced with a 1/8-inch gap at all edges and ends to provide room for naturally occurring expansion. 10. Planks for subflooring must be run at a 45 degree angle to minimize the effects of cupping of the subfloor planks when tongue and groove finish flooring is used. Tongue-and-groove edges on many premium floor panels, such as Weyerhaeuser’s Edge Gold ® OSB panels, are designed to self-gap. Here are a few considerations you must make before unrolling your underlayment and installing your first plank. The rest of … Top chord" The upper or top member of a truss. At the angle, the finish flooring rests on the high spots of the subfloor. How to Safely Lift Tongue & Groove Flooring. I haven't measured, but it appears to be the standard 3/4" tongue and groove planks throughout the house. It gave me quite a laugh. the subfloor is 1x6 T&G. (See below for a shopping list and tools. Re: 5/8 Tongue And Groove Plywood Over Old Subfloor I think 5/8 or 3/4 is a good idea like everyone has recommended. OSB is similar to plywood but has a different construction. I'm also in the group of people here with no subfloor. A new layer of 5/8-inch or 3/4-inch tongue-and-groove plywood subflooring is like adding a new subfloor over the old to create a stiffer, flatter surface for any type of finished flooring. I bought a 50+ year old house and have decided to replace the hardwood floors. The standard subfloor for joists spaced up to 16 inches apart is 23/32-inch T & G sheets. You must position the screw so that it penetrates the joist, and goes into but not through the subfloor. As with old-fashioned tongue groove plank subfloor, this product features a ridge that runs along one of the plywood’s edges. :laughing: Anyway, under that is a tongue and groove wood floor. 2. Pine offers grain textures and knots that create an interesting look on your floor. Cutting in a perfect-fit patch with This Old House general contractor Tom Silva. Archived. The kitchen has height limitation for diswasher & fridge, hence the backboard onto subfloor; otherwise would install ext. The house had 3/4" hardwood originally installed over the 5/16" subfloor. I plan on tearing up the old floors and wonder what to do with the existing tongue-and-groove subfloors. For the last 40 years CDX tongue and grooved plywood has been the most commonly used exterior structural subfloor material used in homes. We are redoing an old house with diagonal plank subfloor. The floor joists run lengthwise to the room, and we want to install a floating laminate floor. So the total floor thickness was 1.06". Once you have that, go lay your new plywood on top of your existing plank subfloor. My house is about 20 yrs older, no subfloor in the whole house, the 2 1/2” pine T&G finish floor was nailed right to the joists. Lots of glue and definitely screw it down. Simply so, how do you remove tongue and groove subfloor? Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring. Any fluctuations in humidity, vibrations and traffic is dispersed across the entire floor reducing the possibility of a board edge popping up above the height of the adjacent board it is up against. We sanded and refinished with shellac without any issues. I forgot to mention. Using green joists. Typical fixing for each board was to be double-nailed to every joist with fixings approximately ½” (12 .7 mm) from the edge of the boards (Figure 7). schafudd. On the four foot edges, your seams will fall on joist tops, so no need for tongue and groove. There is no need to remove the groove. Close. The subfloors are really squeeky, the hardwoods are separating in places and there are large gouges in spots. Simply fit the replacement’s groove into the existing board’s tongue. Need Help Finding a Old Town Plank Wood Floors. Typically, the subfloor plywood is ~. I live in a tri level house and it is meant to look somewhat like a cabin. Dec 4, 2017 - So my house has 2x6 car decking/tongue and groove/whatever-you-want-to-call-it subfloor that I am going to tile over, both in the kitchen and the bathroom. View Full Version : Old 1X6 tongue and groove SubFloor. This new layer will act as the subfloor, not an underlayment. Answer: Dear Amy Suffice to say I cannot teach you how to sand a floor by email. The flooring throughout is tongue and groove pine. The bathrooms currently have linoleum and I want to put something better in there. Plan the layout of the plywood sheets so the long dimension of the plywood runs perpendicular to the floor joists. Advice: 1890 home with 1x4 tongue & groove subfloor. The original wood floor is still intact - pine we believe. Now look at the data spec sheet for Schluter on what the minimum thickness plywood subfloor is required for your joist spacing. For subflooring, you use tongue and groove plywood. Plywood subflooring is much like standard plywood but has special tongue-and-groove edges to help stiffen the floor and prevent squeaks. If you have a strip wood floor over a plywood subfloor, you can also do this repair, but the screws will have to penetrate completely through the subfloor and at least partially into the strip flooring. What I mean is I have wood paneling (that I have painted cream) and this "bottom" wood floor is the ceiling for the rooms down stairs. This plywood is made from thin sheets of (usually southern pine) veneer that are cross-laminated and glued together forming … 02-23-2006, 11:50 AM. I'm laying 12x12" ceramic tile. Tiling options for 48" floor joist spacing with 2" tongue and groove subfloor I have an old ranch house built in the 1950s in Northern California. Question: I have just bought a house, built in 1935. The rest of … The tongue of one piece of OSB slides into the groove as the material is installed so the long edges don't sag in between the floor joists. Re: Need tongue&groove subfloor if placing over old subfloor? When we first moved in 27 yrs ago I nailed down 1/8” luan and put a sheet vinyl floor in the kitchen and developed quite a few … Using tongue & groove plywood subfloor is preferable because the tongues and grooves slide into and lock together causing the floor to become one unit. home improvement. The hardwood was pet stained badly in areas over a period of 9 years so I'm tearing it up and replacing it. I suggested screwing this new layer of subfloor (notice I ain't calling it underlayment) to the joists only because your first layer is NOT a proper subfloor. u/mechbuy. The tongue and groove are only along the 8 foot edges. Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. Pulling up tongue-and-groove flooring can be tedious and time-consuming -- more so when the boards are glued -- but it's not a test of carpentry skills. Timber floorboards through this period were typically rimu or matai, tongue and groove (T&G) boards, 25/32” (19.8 mm) thick and could be in widths of 3½, 4½ and 5½” (90, 115 and 140 mm). We have 30-year old house with 2×6 T&G subfloor on 4′ OC joists and am installing 12×12 porcelain tile over backer board in kitchen, dining room, hall & baths (continuous run of tile). True strip floors are a product of the Industrial Revolution, and started to become widely affordable and reliable in quality in the 1880s. The type of OSB used for subfloors generally is made with tongue-and-groove edges (T & G). Blind Nail – With this technique you can now blind nail the board in place by nailing through the tongue into the subfloor or floor joist. Advice: 1890 home with 1x4 tongue & groove subfloor. plywood between subfloor & backerboard. Re: Tongue and Groove installation-- bowed floor Post by Shannon » Tue Apr 14, 2020 5:03 pm No one expects 100 yr old homes to be perfect, its part of the charm. The tongue and the groove are an integral part of subfloor construction. Old subflooring [1xs] were either installed perpendicular to the joists or on a diagonal. There is a degree of finesse here. I understand that I … 1 year ago. And I doubt that the rental […] Tongue-and-groove plywood is available to reduce squeaks and help the subfloor fit together better. Laying a New Subfloor Over Old Pine Flooring. But to start off, we will need to remove the tongue so the plywood is tight with the exterior ICF walls. Use a beater board and hammer to make sure it is fully seated and snug. I have a second story floor that was carpet over plywood subfloor. My husband and I would like to refinish it ourselves. Part 1: Installing the Tongue-and-Groove Plywood Subfloor System Bob talks with carpenter Bob Ryley and general contractor Kevin Kalman, as they lay down the subflooring at the Mt. It is engineered wrong and structurally insufficient. Plywood is also installed perpendicular [the 8' lenght] When a house is built, the foundation and floor framing comes first, then the subfloor followed by the wall framing. We just bought an 80 year old house and are fixing it up. When you fix the ply to the old floor, you should avoid fixing it to the joists. So my house has 2x6 car decking/tongue and groove/whatever-you-want-to-call-it subfloor that I am going to tile over, both in the kitchen and the bathroom. Thanks for the info. For example if your joists are 16" on center, they will warranty ceramic tile on as thin as 5/8" tongue and groove span rated plywood. Steam-powered machinery, which made the milling of dense hardwoods like oak and maple practical, also enabled edge-matching the sides of each board into a sophisticated system of tongue-and-groove joints. ... 2x8 joists on 16. house was built in '37 so some are fine some are knotty. What are the steps? 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