plywood between subfloor & backerboard. Simply fit the replacement’s groove into the existing board’s tongue. Using green joists. 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 … u/mechbuy. True strip floors are a product of the Industrial Revolution, and started to become widely affordable and reliable in quality in the 1880s. And I doubt that the rental […] 02-23-2006, 11:50 AM. There is a degree of finesse here. It is engineered wrong and structurally insufficient. The rest of … 10. the subfloor is 1x6 T&G. 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. 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. 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. We sanded and refinished with shellac without any issues. Old subflooring [1xs] were either installed perpendicular to the joists or on a diagonal. Need Help Finding a Old Town Plank Wood Floors. (See below for a shopping list and tools. home improvement. 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. It gave me quite a laugh. I forgot to mention. You must position the screw so that it penetrates the joist, and goes into but not through the subfloor. When you fix the ply to the old floor, you should avoid fixing it to the joists. Archived. 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. I plan on tearing up the old floors and wonder what to do with the existing tongue-and-groove subfloors. 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). Posted by. Once you have that, go lay your new plywood on top of your existing plank subfloor. I'm laying 12x12" ceramic tile. 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. For subflooring, you use tongue and groove plywood. Typically, the subfloor plywood is ~. ... 2x8 joists on 16. house was built in '37 so some are fine some are knotty. On the four foot edges, your seams will fall on joist tops, so no need for tongue and groove. Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring. Advice: 1890 home with 1x4 tongue & groove subfloor. I live in a tri level house and it is meant to look somewhat like a cabin. Question: I have just bought a house, built in 1935. But to start off, we will need to remove the tongue so the plywood is tight with the exterior ICF walls. The tongue and the groove are an integral part of subfloor construction. 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. At the angle, the finish flooring rests on the high spots of the subfloor. Laying a New Subfloor Over Old Pine Flooring. This new layer will act as the subfloor, not an underlayment. 2. For the last 40 years CDX tongue and grooved plywood has been the most commonly used exterior structural subfloor material used in homes. schafudd. 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. The hardwood was pet stained badly in areas over a period of 9 years so I'm tearing it up and replacing it. I bought a 50+ year old house and have decided to replace the hardwood floors. 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. 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. 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. Thanks for the info. The bathrooms currently have linoleum and I want to put something better in there. Cutting in a perfect-fit patch with This Old House general contractor Tom Silva. 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. 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. Simply so, how do you remove tongue and groove subfloor? The floor joists run lengthwise to the room, and we want to install a floating laminate floor. 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. The direction of the floor joists determine the orientation of the subfloor. Re: Need tongue&groove subfloor if placing over old subfloor? The house had 3/4" hardwood originally installed over the 5/16" subfloor. I understand that I … 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. 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. The tongue and groove are only along the 8 foot edges. What are the steps? Tongue-and-groove edges on many premium floor panels, such as Weyerhaeuser’s Edge Gold ® OSB panels, are designed to self-gap. We just bought an 80 year old house and are fixing it up. 1 year ago. How to Safely Lift Tongue & Groove Flooring. 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. The flooring throughout is tongue and groove pine. Here are a few considerations you must make before unrolling your underlayment and installing your first plank. The rest of … 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). We have pine tongue and groove planks that sit directly on the joists. Lots of glue and definitely screw it down. 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. Top chord" The upper or top member of a truss. Pine offers grain textures and knots that create an interesting look on your floor. We are redoing an old house with diagonal plank subfloor. The kitchen has height limitation for diswasher & fridge, hence the backboard onto subfloor; otherwise would install ext. Answer: Dear Amy Suffice to say I cannot teach you how to sand a floor by email. 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. 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). Close. Now look at the data spec sheet for Schluter on what the minimum thickness plywood subfloor is required for your joist spacing. The original wood floor is still intact - pine we believe. The subfloors are really squeeky, the hardwoods are separating in places and there are large gouges in spots. I'm also in the group of people here with no subfloor. I haven't measured, but it appears to be the standard 3/4" tongue and groove planks throughout the house. The standard subfloor for joists spaced up to 16 inches apart is 23/32-inch T & G sheets. Plywood subflooring is much like standard plywood but has special tongue-and-groove edges to help stiffen the floor and prevent squeaks. :laughing: Anyway, under that is a tongue and groove wood floor. OSB is similar to plywood but has a different construction. Difference between subfloor underlayment and joists how to repair replace old tongue and groove plank subfloor in replacing a soggy rotten bathroom sub floor how to build house jeffrey major subfloor replacement excerpt you how to repair replace old tongue and groove plank subfloor in fixing wood floors old house journal magazine. So the total floor thickness was 1.06". View Full Version : Old 1X6 tongue and groove SubFloor. I have a second story floor that was carpet over plywood subfloor. Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. Use a beater board and hammer to make sure it is fully seated and snug. Advice: 1890 home with 1x4 tongue & groove subfloor. My husband and I would like to refinish it ourselves. This plywood is made from thin sheets of (usually southern pine) veneer that are cross-laminated and glued together forming … As with old-fashioned tongue groove plank subfloor, this product features a ridge that runs along one of the plywood’s edges. 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. Plan the layout of the plywood sheets so the long dimension of the plywood runs perpendicular to the floor joists. The type of OSB used for subfloors generally is made with tongue-and-groove edges (T & G). There is no need to remove the groove. Using tongue & groove plywood subfloor is preferable because the tongues and grooves slide into and lock together causing the floor to become one unit. Tongue-and-groove plywood is available to reduce squeaks and help the subfloor fit together better. 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