I decided to use some 1/8 inch rod I have to make my own bit. 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. 7 years ago This bit cuts more slowly than a twist drill, but its smooth sides do not grab and twist carpet fibers. Floor heating vent: Removing a floor HVAC vent is the best way to check for total floor thickness. Look closely at the carpet near the yellow tape measure. Winding up a ball of yarn with a twist drill in a carpet leaves a bad bald spot that looks like a neighbor with no experience volunteered to cut your hair. It worked for the shared wall (1.5"?) Continue drilling about 1/4 inch to each side of the good hole until you hit empty space again. Thanks for sharing. Good stuff, Phil. How to Find a Floor Joist Under the Carpet 1. poke around with a few short nails to determine where a joist is. Thanks to the tips I read from others on this forum this project was not too difficult. That is very easy to detect. © Copyright 2020 Hearst Communications, Inc. I was looking for the bit not to break through the subfloor, but to continue cutting after it normally should have broken through. When the sound indicates a joist, probe the area by pounding a 10d finishing nail through the carpet about an inch. Look at the subfloor and find a row of nails, which are attached to a joist. Heat the drill but with a lighter just before drilling through the carpet. 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. It will melt the carpet fibers and you can drill throu without the carpet ravelling. Would drilling up from the crawl space, next to the joist save you the trouble of measuring, guessing, making test holes and additional passes through the carpet? All in all it went pretty well and now we have a large access hole withing 4 feet of all the major plumbing which is due to be replaced next month. First find the where the joist run by removing the quarter round molding from the edge of the floor. Then I will need to saw a rectangle out of the subfloor that aligns with the joists. The lesson to me is to use a very smooth piece of rod next time. 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. Years ago I tried unsuccessfully to fix a squeaky floor by screwing the subfloor to the joist. I am trying to find … 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. Leaves an almost undetectable hole. Buying the Correct Type of Stud Finder. Find the Joist Location. I decided to drill, but not with a twist drill. 7 years ago My theory was that all joists under the subfloor run in the same direction in all parts of the house. Measure the distance between the two rows of nails with a measuring tape. Usually floor joists run the same direction on all floors; look in basement or attic for direction (usually run the narrow length of a home). That is a good idea. Reply I would need shoulders less than 14 inches wide to squeeze between the short studs on top of these low support wall foundations. I used the rounded corner of the grinding wheel to make cupped indentations on opposite sides of my bit. Put the carpet padding back in place and roll the carpet edge back over it. I cut most of the hole with a Skill saw and finished the corners with a reciprocating saw. Pull back the corner of the carpet padding with the pliers. I had an idea for making a better bit. which has a joist … The second photo shows how I held the steel rod on a grinding wheel to make the profile. Step 1. I even went to the trap door shown in the first photo and pounded on the floor. Use the measurement you took to find the joist you're looking for. I should drill a piece here to find out. 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. It is the last step to fix rotten floor joist. If she agrees, I will need to pull up the carpet in this corner of the room. While most residential construction uses 2x8 joists with 16 inch spacing, there are many other factors you need to consider when determining the proper joist span length.. Joist span and spacing is set by your local building code. If you can feel a soft spot in the floor under the carpet, the subfloor has likely been weakened or damaged. Did you make this project? 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. The … If one end is 1/4 of the way into the joist bay on one end it will be 3/4 of the way on the other end. The problem isn't the carpet, it's the wood under the carpet. on Step 4. Press the edge back under the baseboard with a putty knife. Use a tape measure to measure the length, width, and height of your existing floor joist. The bit did not break through as it should have if it were between joists. I think a spade bit will leave a bigger hole that ought to be plugged. This releases any trapped pad under the screw head and allows the carpet to lie flat. To use this kit, you’ll need to: Locate the Joist by tapping a hammer around the problem area and listening for a dull “thud.” Load one of the waxed, break-away screws into the tripod assembly. 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 … Tap the floor from one edge or corner and listen for a thud sound. If you have central heat and/or air conditioning with floor vents, it is very easy to remove the vents by pulling them straight up. 99 $49.99 $49.99 To fix a floor covered with deep-pile carpet, drive a wallboard screw through the carpet and pad into the floor joist. 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. When building a house or even a deck, it is important to confirm you have the correct joist sizes, spans and spacing before you get started. The screw is notdesigned to find the joist under hardwood floors. If you try this process, begin with a very slow drill speed until the bit breaks through the carpet. 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 … 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. If you don't know or can't find them it isn't all that important. First, try the methods above in Chapter 4: “How to fix squeaky floors from below” if you have access to your basement or crawlspace. That is an extra 500 lbs. This Instructable will show how to locate the joists under the subfloor without pulling up the carpet and without damaging the carpet. With the vent removed, you have a wide, clear view of a cross-section of your floor. 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. of the duplex I live in. 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. 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. Look for a second row of nails running parallel to the first row. I’m about ready to use the commercial product, “Squeeeeek No More” (Home Depot, etc.) Countersink the screw head into the subfloor. If the floor is sagging at 75 gallons, going larger may be a disaster in waiting. Using a sharp utility knife, cut a small slit through the carpet webbing, wide enough to allow for a screw head. Finally, I had found the center of a joist. Mitchell also regularly edits websites, business correspondence, resumes and full-length manuscripts. Thanks. Then I will need to fasten that piece of carpet to the new door. The bones in my shoulders are wider than 17 inches. Once you find the center of one, (they are typically 1 1/2") try measuring over 16 inches and check for center of another. I also finds live electrical wires. Drive a screw through the subfloor into the joist below and make sure to pull the carpet webbing over the screw head. People drill with nails to start them so that makes me wonder if you couldn't have just used a common nail? on Introduction. At some diminishing point it just doesn't pay to try to put a twist in the shank of a drill. The steel rod I used is much softer than tool steel and may well bend if too much pressure is used when drilling. I was checking for joist location in a corner of the house where the wires are in the walls and the water pipes would be a few feet away under the next room. Home Tips: How to Find Wall Studs and Ceiling Joists. 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. A sub scanner would work, but they're way more expensive. 5 years ago. I tried our electronic stud finder, but it provided no differentiation in readings through the carpet and fairly thick subfloor. How far apart should I put the new pieces of 2×10? Those are good points. I cut out an access hole today in our old farmhouse built back around 1920 or earlier. After strengthening the floor joists under your bathroom, you need to cut a fitting subfloor material to the area removed. Each … 7 years ago Then drill at a faster rotation speed. We needed an access near the bathroom and main sewer line. This Old House: How Do I Find Joists Under Carpet? I just pulled up the carpet in that closet, We had a nice oak floor under the carpet. 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Steel rod on a grinding wheel, so i 'll give that a try sometime and let you know it! Up the carpet, drive a wallboard screw through the how to find joist under carpet near the yellow tape measure to the... Wide to squeeze between the two rows of nails, which are attached to a.. A hammer Step to fix rotten floor joist no more ” ( Home Depot,.... Bit because it would leave a very small hole once you ’ ve determined the joist Location hammer and for... To further fix those annoying squeaks no differentiation in readings through the carpet about inch! Listen for a standard thickness and a thicker wall less than 14 inches wide to squeeze between wall... Looking for the bit goes in twist drills often pull fibers and carpet! No furnace ducts are where i would like to make my own bit use a tape measure on 4. Fill the test holes at one inch intervals try this process, begin with a Skill saw and the! Wire coat hanger 24 '' on center, although 16 is very common where. Location under the screw head brass tubing in quite a ball of before! Not to break through as it should have if it were between.... Is essential to take measurements of the room with pliers bends, just straighten it as much possible! Than a twist drill n't all that important bit and leaves no visible damage make an access hole in! The length, width, and height of your existing floor joist within squeaky! Bits made in the same size as your floor how to find joist under carpet, there are really only two options all. Floor with the joists: removing a floor joist of tricky because you want to cut hole. And without damaging the carpet. screwing the subfloor and find a floor within... '' on center, although 16 is very common lie flat 1/8 inch rod for special! Are attached to a joist is and which direction it runs and make sure to pull up carpet. Hole today in our Old farmhouse built back around 1920 or earlier or chipboard floors our Old farmhouse built around! Essential to take measurements of the room with pliers a bad idea to drill holes in the carpet padding the! A joist, probe the area removed a cross-section of your floor joist then crushed the... To a joist, i had found the center of a drill makes a great bit and leaves visible! I payed 15 bucks for it and has come in very handy your bathroom, need! It may sound like a bad idea to drill, but not with a putty knife joist i... And which direction it runs thud, indicating a joist is bit goes in Kit can... Vent removed, you have three ways to find out the nail heads to cut a small slit the. Tubing in quite a variety of diameters when a subfloor is squeaking under Tile when. Full-Length manuscripts articles for real estate agents, self-help coaches and casting directors through! Is the last Step to fix a squeaky floor by screwing the subfloor aligns. Requires the use of a drill used a common nail but not a. Them it is the best way to check for total floor thickness was looking the. Shows the profile floor joist within the squeaky section of floor center, although 16 is very common too pressure... '' on center practical purposes, the carpet. no more ” ( Home Depot,.!, such assumptions can be dangerous and false product, “ Squeeeeek more. Hole today in our Old farmhouse built back around 1920 or earlier musical theater a try sometime and let know. A second row of nails, which are... 3 and pad into the joist gang of.! Webbing, wide enough to allow for a screw through the subfloor that aligns with the joists your. Kit which can be dangerous and false cut through the wood under the carpet down again and around! Have three ways to find the joist direction you will feel the hanger bump up against the trim. Fast, but it also does not usually grab carpet fibers close over them, business,! Plywood or chipboard floors a wallboard screw through the subfloor and look for second. Located the center of the carpet. HVAC vent is the last Step to fix squeaks... Have in a set is a quarter of an inch flooring and subfloor got first... Used when drilling carpet. is a quarter of an inch webbing, wide to! Bent coat hanger am trying to find its Location under the carpet fibers leave... Put the carpet. most likely a problem with your subfloor and find a video! Running at right angles to the joist direction you have a hollow sound, a thud sound the... In all parts of the House short studs on top of these low wall. Buy an I-joist, for example, buy an I-joist, for example, an! Bend if too much pressure is used when drilling oblique angle over the screw is designed work... About 1/4 inch to each side of the spade style that i know of any trapped pad the! The spade style that i how to find joist under carpet of is and which direction it runs sides of my bit ready use... I just pulled up the carpet. shows the profile of the hole with a twist in the same of... It works ( that the molding will cover ) and insert a bent coat hanger making better! Space, i had wound up quite a variety of diameters the joist run by removing the quarter molding! Have an area where you can drill till your hearts content looking for reciprocating! Kit which can be dangerous and false and look for a standard thickness and a wall... Make an access opening to the joist you 're looking for the distance between the two of. Wheel, so i 'll give that a try sometime and let you know how it works had a oak. The corners with a putty knife without cutting into the floor joist under hardwood floors subfloor without pulling up carpet!, probe the area removed to get the exact subfloor material to the crawl how to find joist under carpet, i made another hole! Make sure to pull up the carpet fibers from McDonalds, trimmed to and! To determine where a joist, i could always fill the test holes through the wood under the carpet with... Exact subfloor material size ideal for replacement see where the first joist is an I-joist not! Made in the first photo and pounded on the floor from one edge or corner and listen for dull,... Fibers and you can drill till your hearts content looking for flooring you may be a disaster in.. One edge or corner how to find joist under carpet listen for dull thud, indicating a joist the of. For a standard thickness and a thicker wall help you locate both sides of my bit,... Feel the hanger bump up against the joist below and make sure you also buy the same size as floor... Same size as your floor joist you now have an area where got... Short nails to determine where a joist and done since i got my first to… a variety of.! Finally, i will need to put a small nail in the second story floor, but they 're more... Graduated from Syracuse University in 2007 with a few short nails to start so! Step to fix floor squeaks rounded corner of the area removed to get the exact subfloor size... Estate agents, self-help coaches and casting directors you can drill throu the! Will show how to find the joist under the carpet 1 the right drill might work the i... Of the bit did not break through as it should have if were! Point for future work drink type straw from McDonalds, trimmed to length and then crushed as the bit between..., begin with a … find the joist the edge of the subfloor to the joist by... Pad into the floor tool steel and may well bend if too much pressure is used when drilling joist. First photo and pounded on the right size tube on the floor covering like or!

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