The drain pipe had been cut off and capped from below (via a nice new hole in our garage ceiling) and the old flooring and subfloor torn out, so there were no references to go by except for the toilet supply line. The flange rim will be fastened to the finished floor later. Be as precise as possible but remember that the circle you cut doesn't need to be perfect. DH pulled the toilet and we put little pieces of wood around the hole in the floor to kinda separate the linoleum from the subfloor, and we put a fan on for the good part of three days to dry things out. This is important. Here is one method to replace the sub-floor (plywood) under a toilet. It's the stainless steel 4" flange from depot. I found this hole a while back when removing my old carpet: It was filled with a bunch of nice razor blades and nails, you know, the kind of stuff you just want to roll around in. Cutting Subfloor hole for Toilet Flange. It's best to cut it out and replace with a solid piece of new subfloor. molo Member. Thank you for your thorough response! He crawled under the house to check the status of things from underneath, and no wetness, no damage, etc. What are my options. The toilet flange and waste line are all cast iron. When replacing the wood subfloor around the toilet, you may have access to the joists so you can nail the new subfloor patch to them. Hard for this untrained eye to tell just how it's attached. I need to find a way to close up this hole in such a way that the repair job can withstand the same amount of traffic as the undamaged subfloor in my room. Thank you for the reply. Sponsor Paid Advertisement . What complicates things is a pipe running parallel to the joists just an inch or so beneath the subfloor. Discussion in 'Toilet Forum discussions' started by molo, Oct 22, 2006 . Once the screw tips are cut off flush with the basement ceiling the area will be prepped for the larger plywood second layer of support. Repairing a damaged subfloor is serious business, but it doesn't have to be scary. I hope you are talking about underlayment, and you have a little more play front and back, but I cut them about 7 1/4" for a 7" flange. Hello everyone, A few months ago we had some water damage from a leaky toilet. I decided I would pull up the linoleum since it had water damage and put some new stuff down. The placement of the hole will determine where the toilet will sit, so be sure to consider this carefully before you get started. Big time important. Drill a 3/8-inch hole with a twist drill so its edge falls just on the inside edge of the circle, then insert a rough-cut jigsaw blade and carefully cut the circle out, turning the saw constantly to keep the blade on the line. Note the cut is perpendicular to the joist. The maximum would have a 5” diameter. In most homes, the back of the toilet tank is against the wall. Cut a hole in the subfloor just large enough for the bottom part of the toilet flange to sit. The center of the toilet flange should be 12″ from the finished wall (add a 1/2″ for drywall if measuring from the framing). The toilet gets attached to the flange after you've cut a hole for the flange pipe in the subfloor and screwed the flange ring to the floor. He said they just placed floor over it and that if it gave us any issues, they would have to cut out that part of the vinyl and put in a metal plate, similar to what is around the floor plugs, but this would just serve as something to plug the hole in the subfloor. Where to cut toilet pipe for new subfloor patch. I cut one piece of wood for the floor and cut a hole, smaller than my husband's but still too big at abt 8 inches. After three days, no more squishy! Joined: Sep 23, 2006 Location: Cold New York. My flange has two simple notches for the toilet bolts to hook onto, otherwise it's just a round disc. You don’t know what’s under the subfloor so for all you know, there are electric or water lines and you do NOT want to cut these. too involved being that I already have drywall below. Step 2. In this project we cut the waste pipe for the toilet because we wanted to have the toilet flange sit on top of the tile. In this case, once making the proper measurements, you can replace the plywood of the subfloor with the hole … Also, the hole diameter is about 7.5" and 1 and 3/4" deep. I looked under the toilet [made 1970] and found that the hole in the floor and the area formed in the porcelain for mounting the flange are nearly exactly the same size. Set flange, re-tile, re-seat toilet. As I pulled up I found there was mold and significant damage to the sub-floor. And finally I'm ready to install the toilet flange. If you’re simply replacing your toilet, and notice the center of your flange is only 10 inches from the wall, there’s no need to go through the hassle of moving the flange. Danpe New Member. How to Cut HardieBacker Cement Board. You may be able to use a different toilet rough-in to dodge the framing. See more ideas about repair, toilet repair, home repairs. The ID of the toilet flange will fit over the drain pipe nicely. Gary Swart, Dec 13, 2014 #2. We had a 2-week old baby at the time which caused us to panic a little about the mold. Or suppose you’re roughing in a toilet and there’s a floor joist in your way. Cut a straight line from each hole to the flange to separate the ring into two halves, then lift the halves off the floor. After doing the research, that I should have done first, I realized that the hole was too big. before to cut hole in subfloor and work from there. The set-up you have now (can't be 100% on your setup because the pics don't tell the whole story) looks to be a bit shoddy and the surrounding subfloor looks to be water damaged. Cutting joist not option. Actually that photo is the concrete subfloor, covered with Red Gard a waterproofing membrane. Dec 29, 2019 - Explore Bob McIntosh's board "Subfloor repair" on Pinterest. Just get a water closet with a 10″ rough-in. Test fitting plywood layer that is cut in half to get around pipe, that will fit subfloor hole. Typically, the hole for the drain pipes is located 12 inches from the wall. If this is an entirely new cut, a 14 x 14-inch opening may be needed; again, check with professionals or the plumbing code to see how large the hole will need to be. I don't know what I measured when I cut the hole in the subfloor for the toilet drain, but you can see in the picture that it is off center, resulting in a big gap on the right. 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