To fix a floor covered with deep-pile carpet, drive a wallboard screw through the carpet and pad into the floor joist. Look for a second row of nails running parallel to the first row. I am trying to find … This isn't the same as having a floor squeak when you step on it, which simply indicates that the subfloor isn't tightly fastened to the floor joist in one area. When I was drilling one hole the bit stopped cutting and I heard the sound of my bit rotating against the head of a nail. Any stud finder will read a sheet of plywood as a whole gang of joist. Tap the floor from one edge or corner and listen for a thud sound. After strengthening the floor joists under your bathroom, you need to cut a fitting subfloor material to the area removed. How to Find Joists Below a Hardwood Floor. I should drill a piece here to find out. I also finds live electrical wires. First, try the methods above in Chapter 4: “How to fix squeaky floors from below” if you have access to your basement or crawlspace. If I do make a second trap door access to our crawl space, I could always fill the test holes with putty. There are electronic stud finders the have settings for a standard thickness and a thicker wall. 7 years ago I was trying to keep the hole very small and the wood under the floor is about 35mm thick, so it would be difficult to get enough of an "L" shape to feel the joist. Look at the subfloor and find a row of nails, which are attached to a joist. If the floor is sagging at 75 gallons, going larger may be a disaster in waiting. I am trying to gather information before I make a decision on whether to add an access door to this part of the crawl space.. Pictured is the trap door in another closet at the other end of the house. Grip the edge of the carpet in a corner of the room with pliers. on Step 4. Use a stud finder Tap the carpet with a hammer to find the difference in sound over the joist and adjacent empty bay; Utilize the special joist finding tool in … on Introduction. Thanks for sharing. of the duplex I live in. The tape measure presses against the baseboard trim on the inside closet wall and provides a reference point for future work. I did learn from the contractor that my one door at the other side of the house is supposed to serve as my access to the whole house, but I would need to crawl through an opening under the floor that is 11 x 17 inches. My tool did tug a piece of yarn loose, but that was because the rod I used for my bit had a clump of rough, hard paint on it; and the paint clump caught the yarn. We needed an access near the bathroom and main sewer line. If the bit bends, just straighten it as much as possible by hand. I tried our electronic stud finder, but it provided no differentiation in readings through the carpet and fairly thick subfloor. I saw this trick on an episode of This Old House. That is very easy to detect. Measure the distance between the two rows of nails with a measuring tape. I wanted to drive some long finish nails to locate the joists, but my longest finish nails are too short to pull out of the carpet again. It will melt the carpet fibers and you can drill throu without the carpet ravelling. If the floor is squeaking under a carpet, we recommend trying a The Squeeeeek-No-More Kit which can be purchased at Amazon. I drilled test holes through the carpet and subfloor. We have had a frozen waterpipe there and I want to check for damage to the pipe, as well as do what is necessary to keep it from freezing again. 7 years ago The nails tell you where the first joist is and which direction it runs. Pull back the corner of the carpet padding with the pliers. Not a piece in my floor mind you, I have some scraps of carpeting lying around. Find a replacement joist that is the same size as your floor joist. Otherwise you now have an area where you can drill till your hearts content looking for the joist. Generally, the most area will have a hollow sound, a thud sound signify the presence of joist. That is kind of tricky because you want to cut through the wood flooring and subfloor without cutting into the floor joist. The joists in this part of the house run at a right angle to the yellow measure tape, which is consistent with the direction they run in the closet on the other side of the house. Continue drilling about 1/4 inch to each side of the good hole until you hit empty space again. 3 Chuck the joist-finding screw into the drill/driver. Heat the drill but with a lighter just before drilling through the carpet. 2 Tap the carpeted floor with the hammer and listen for dull thud, indicating a joist below. Then I will need to saw a rectangle out of the subfloor that aligns with the joists. I was looking for the bit not to break through the subfloor, but to continue cutting after it normally should have broken through. How to Prepare a Subfloor for Ceramic Tile. AND, if possible, how to further fix those annoying squeaks. Step 1. For all practical purposes, the carpet fibers close over them. Carpeting makes it slightly harder to find floor studs than it might otherwise be, but don't be put off -- the job still doesn't require special tools or too much time. Good stuff, Phil. How to fix a squeaky floor under carpet. I had an idea for making a better bit. Share it with us! Using a sharp utility knife, cut a small slit through the carpet webbing, wide enough to allow for a screw head. I cannot get to the kitchen from the door in the photo because there are two low supporting foundations for load bearing walls located between this door and the kitchen. Those are good points. Years ago I tried unsuccessfully to fix a squeaky floor by screwing the subfloor to the joist. Did you make this project? Floor heating vent: Removing a floor HVAC vent is the best way to check for total floor thickness. For example, if the distance between the first two joists is 16 inches, measure across the room in 16-inch increments until you reach the area where you need to locate a joist. It is essential to take measurements of the area removed to get the exact subfloor material size ideal for replacement. Put a small nail in the hole at the center of the joist. But, such assumptions can be dangerous and false. 7 years ago I'm imagining a soft drink type straw from McDonalds, trimmed to length and then crushed as the bit goes in. In either direction you will feel the hanger bump up against the joist. If the floorboards under the carpet squeak, drive a wallboard screw all the way through the carpet and pad into the floor joist, countersinking the screw head into the subfloor. The lesson to me is to use a very smooth piece of rod next time. It worked for the shared wall (1.5"?) When a floor dips under weight, usually that means that the joists are undersized (or compromised), or that there is no support like a load bearing wall under where you want to place the tank. Thanks to the tips I read from others on this forum this project was not too difficult. Make sure you also buy the same type of joist. Not that important. I just pulled up the carpet in that closet, We had a nice oak floor under the carpet. When I tried it, I had wound up quite a ball of yarn before I knew what was happening. on Step 4, Reply Wrap a clean cloth around the head of a hammer and secure it to the neck, using a rubber band twisted around it two or … The wooden beams that support a subfloor are called joists. I am thinking and hoping no furnace ducts are where I would like to make an access opening to the crawl space. Joists are spaced evenly across the room, so the distance between the two rows of nails is the distance from the center of each joist to the center of its neighbor. This bit cuts more slowly than a twist drill, but its smooth sides do not grab and twist carpet fibers. Before I drywall the basement ceiling, I would like to stiffen the floor joists to eliminate bounce, by installing new pieces of 2×10 perpendicular to the existing joists. I was careful not to cut too deep where I suspected the floor joists were and came back and finished cutting over the top of them with the reciprocating saw laid down as much as possible. The only problem was the subfloor was nailed to the floor joist with some very large nails and they did not come out very easily. Put the carpet padding back in place and roll the carpet edge back over it. Note the spot where you got the solid sound and drill straight down with a … My problem is that I cannot yet get into the crawl space, unless I find the location of the floor joists and make an additional door through the floor. Joists are normally spaced 16 inches apart, but the distance can vary, especially in very old homes, from 12 inches to nearly 20 inches. Lets say you are going to 125 gals. I know where the joists are there, but I still could discern no difference in the sound when pounding near a joist or between joists. The screw is notdesigned to find the joist under hardwood floors. Great Idea, this method seems very easy, although I would advise caution if you are uncertain how your wiring and plumbing are run under the home. This Old House: How Do I Find Joists Under Carpet? on Introduction. This all seems like a lot of work, but home repair sites frequently recommend making a new door in the floor to access parts of the crawl space that are otherwise inaccessible. 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