Diagonal floor installations can be installed on both plywood (minimum sub floor requirements) and concrete subfloors. dbtr505_4fd. BC plywood over the old subfloor, using construction adhesive and driving 1-1/4-in. It's how I ended up here (it's my go to place for solutions, though this is first time posting). 1"X8" plank subfloor nailed on the bias to the joists 1"X4" softwood boards nailed perpendicular to the joists on top of the subfloor. Any new hardwood installation does not require additional sub flooring unless the preferred direction is the same as the old plank subfloor. Suppose that one had subfloor boards that are 8" wide and place finished flooring 2 1/4" wide on the subfloor board. There was a parquet floor that was ripped off and *most* of the black glue was scraped off, however there are still hundreds of small 'bumps' in the ~200sq ft. area. Luckily, we are familiar with toilet flange extensions though may need to trim the door. In my own personal opinion, diagonal installations at a 45º angle will make your home stand out in the neighborhood. I think the joists are fine. My plan for the floor is to install 3/4” plywood underlayment on top of the existing diagonal wood plank subfloor and then eventually lay tile. There are no structural subfloor components that can effect the performance of the hardwood floor except prestressed or precast concrete. Bridge the cut joist to the two joists on either side of it, across both cut edges. Is the pressed wood a fire hazard too close to the fireplace? 2) I need to frame next to the tub as the tub is 60" long but area is 72" wall to wall, so if I SLC should I frame before or after the SLC goes in? Questions of a Do It Yourself nature should be submitted to our "DoItYourself.com Community Forums". Other situations where attention should be taken into account would be if thinner sub flooring was used, or settling of the home had taken place with visible peaks and valleys across the subfloor. Can I install 3/4" of hardwood flooring directly upon the original plank subfloor? All information is provided "AS IS." Standard chop saws cannot cut past 45 to 48 degrees without using a jig. The example shown is our Country Style random width Walnut. thinset applied with 1/4 inch x 1/4 inch trowel applied on top of the plywood/osb More modern homes have a floor joist system and a subfloor. Choosing which direction to install wood floors is often a confusing choice for many. Hi,Chandler, thanks for your quick reply, I'm working on trying to post a photo: keep getting file too large for both from my computer and URL. Image Source: Bill Price (10 degree layout). Have you removed all the concrete and metal where the original flooring was? And diagonal subflooring has less effect on creating shrinkage cracks in the finish flooring. Can I put LVP (underlayment first) over this type of subfloor? Other applications can include using a full length piece as a backer board for the start of the installation. However, it should not prevent you from using them as they were certainly used in the past. Is it ok to use pressed wood, or should I replace it with drywall? I was told this was not a good idea. Once the preferred angle is achieved simply create the template board to be used throughout the installation. Some ask.."I have this long hallway. Things to take into account when laying ply over plank subfloors: Take time to make sure your existing planks are well secured in place. In this example I simply took a three to four foot board, cut two outside 45 degree angles on the miter saw, placed it into the area finding a comfortable starting point where enough expansion space area was allowed. First off, what is a diagonal? I'm tiling a kitchen floor for my dad. We had previously tried laying a floor (planks on horizontal to "force" level the planks for tub, but it didn't work. Traditionally, the subfloor was made up of pine planks laid side by side, either perpendicular to the underlying joists or diagonal to them. i have it on photo bucket now, but it's too large so I'm trying to reduce the size. We will be laying tile so I'm guessing the backer board (we purchased Hardieboard) on top of the other two boards. I would simply screw then down tightly to the floor joists. The subfloor is level and solid. Now, we have a plan for this morning. A few variations can really set off the appearance of your home. Diagonal installations have a tendency to bend at the perimeter because there is not enough backing to keep it aligned with the firmer larger areas. They are in pairs one above other with 1 foot in between and metal bracing. When removing the tiles, the drywall also came out ripped. For those interested, the easiest way to make these cuts is establishing a template with a two foot long scrap piece. The preference has always been installing perpendicular to the joists, as it provides stronger support for the floor going over it. It's not uncommon after finishing up a job, neighbors come by to casually snoop and ask themselves.."why didn't we do that?" But I noticed the fire place is mounted by 2x4's surrounding it... Installing with the floor joist system or parallel, can lead to sagging or board separation. What are your plans for final flooring? I would simply screw then down tightly to the floor joists. Normally, we would pull the subfloor, block the joist and put a new subfloor. 3/4" Hardwood flooring can be installed over diagonally laid planking. After every row or two is completed, insert the wedges against the wall or base. Older homes with thicker solid plank flooring were installed on a diagonal. Patience is critical with this type of installation especially in keeping the proper amount of expansion space around the perimeter. It's a framer's nightmare. Run the hardwood perpendicular or across the joist. Fixing the underlying problem is as simple as adding another layer of plywood to the existing subfloor, providing your floor joist spacing is in a normal range. Question on New Tub on Un-level Hardiebacker and Need To Frame Some Too. Experienced installers have a better grasp on which direction the floor should run. It is obviously leaving the joists lower than the remaining house. A layer of felt paper between will help prevent squeaks. You can still find this type of subfloor in many older homes. I'm aware that concrete backer board shouldn't be applied to plank subfloor, and that I need to lay down a plywood underlayment first. Consult with experienced professionals to evaluate these systems and what may or may not be needed in your case. Posted December 2nd, 2020 by & filed under Uncategorized. The joists appear to run the span of the house. Diagonal installations are not very common because few salespeople bring up the suggestion, or the contractor doesn't want to handle it as the time involved increases. These type of subfloors have been constructed off site. uptownfloors.com, Country Lifestyle Night Rider Hickory Random - 4 ¼, 6 ¼ & 8 ¼", Country Lifestyle Gentle Breeze Hickory Random - 3 ¼, 5 ¼ & 7 ¼". Instead of a standard 45 degree layout, or the bowling alley look, this homeowner sought a ten degree layout. I have put the hardiebacker and painted the redgard on it and realized that the floor is not level. The planks themselves have warped in some places and when laid down I guess they left large gaps to save from having to shave down a plank. Many suggest 3/8" plywood to be used if you prefer running with the joists. It's not uncommon to have directional changes that offset the appearance, providing you have the proper sub floor. None of these are suitable for a problem free floor installation running parallel to the joists. However, it should not prevent you from using them as they were certainly used in the past. Principally what I wanted to achieve was a good solid starting point. Hardwood on concrete does not follow any of the above. If you plan on tile, let us know the size of your floor joists, their spacing, and the longest unsupported span under the room. The home was built in the 1960s and the subfloor consists of 3/4" thick tongue and groove planks running diagonal to the joists. We can get you on the right path, but pictures would certainly help us. These were usually placed diagonally for added strength. Cut Partial Tiles. Repair any broken planks. This is particularly important if your old sub floor … 1) Should I SLC the part just under the tub and then put the tub in so I don't have to shim the tub? Applications ordinarily call for gluing with a construction adhesive, while screwing or using ring shank nails secured into the floor joists through the existing subfloor. fasten any loose planks and flatten (plane, sand, chisel) any planks that are not level. Welcome to the forums! 1/2 inch - 3/4 inch exterior rated plywood or osb, screwed down to the planks the screws should avoid hitting the joists. All the specifics for DITRA installation are in the handbook or on Schluter’s site. You need to do this in order to keep the floor from having a weak spot in it. Either method, they are held firm to the subfloor with concrete screws. This way your final cut along the opposite wall will be easier to measure and cut. Copyright © 1995-document.write(new Date().getFullYear()) MH Sub I, LLC dba Internet Brands. 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