How To Fix Soft Subfloors (The Easy Way)
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- Опубликовано: 29 сен 2024
- Today I'm reinforcing the rotten subfloors at my trailer home. There's a very easy way to do this that doesn't require ripping your floors apart. Watch my full subfloor series 👉🏼 • Jeff's Subfloor Series
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To learn more watch my full subfloor series 👉🏼 ruclips.net/p/PL34cQkzKfXWblA83LgEySoYGDzL3HTKYS
Hey which plywood is best for the subfloor?? please give me one line answer, I am from Kitchener Ontario. Type of plywood or OSB???
Will this help if the floor is bowing in toward the middle, bouncy coming away a bit from the walls? Or does this mean I need to replace all the studs underneath the floor? I'm trying to do it the easiest and the cheapest way. Thank you so much!
You said "this is sad" more than once. But this is exactly why everybody is here watching your channel! Because it is REALLY SAD everywhere 🙂 Bunch of people wanting to pay absolute minimum and bunch of contractors trying to do absolute minimum for the money they get.
So if your raising the floor essentially do the doors still clear after installing flooring over the double subfloor
envelope the crawlspace and run a humidifier in it...
how can someone be so pleasant to watch, fun, genuine, very informative and straight to the point like you? I lost my dad in a very young age and he didn't had the chance to teach me more "handyman" things. You and your channel has helped me a lot in terms of knowledge. Thank you very much
Cheers Baron, happy to be of help!
I said the same exact thing when I started watching him
I know! He makes me feel like I can do anything!
Which is why you should suggest he take people to work with him and he can MENTOR them in person not just watching videos.
@@atkgrlthat would be cool to watch. Kind of like This Old House
This is great. But how do you transition the new higher flooring to the older existing flooring?
yes i was wondering this
I dont think he does , the whole property gets new subfloor
Subfloor is being removed from my home, unfortunately it had to be done. Urine stained and water warped MDF boards had to go. It's like 70% done then we have to address a couple spots where the original subfloor is water damaged and rotted. Just the smell of that subfloor as it was pulled up reassured me that we made the correct call.
That’s where I’m at. Definitely not going to slap plywood over stank, rotted subfloor.
Make SURE you know where your water lines go before doing this. Laminating the subfloor in this way was how I found out the fire suppression lines in my condo were mounted directly to the underside of the existing subfloor. That made for an exciting night - especially because no one in my condo knew how to turn off the fire supression system, so water poured into my condo for 3 hours before we found the right person. After spending a solid week repairing water damage in the floor below (just my garage, thankfully, and not a neighbor) I marked out the fire suppression system on the old subfloor, and made darn sure to stay 12" away from the lines when putting in the new screws
ouch!
Did the same with boiler line, in mid winter at zero outside.
Having owned a 40-year-old mobile home I completely empathize with your frustration. A modern manufactured home is built like a house, more or less, but 40 years ago they built them like a cab-over camper.
Interesting to watch. How does the humidity get handled now, just assume the plywood is good enough or would there be a best preactice involving some kind of vapour barrier or sealant?
In the beginning of the video where the floor at the by the wall wasn't level and you could put your finger under the ruler how did you raise up that end of the wall I just saw you put a piece of plywood down about 8 inches off the wall but you didn't show how you leveled it off when it dips down on the sub floor
That's what I was waiting to see.
use a floor patch compound before installing the new flooring to level all problem areas!
@@HomeRenoVisionDIY please show how to in a video. Thanks. ;)
@@HomeRenoVisionDIY Which compound? Can you show that? I have this exact problem and was about to put 5/8'' plywood over the voids until i saw this comment.
My grout in my tiled bathroom floor is cracking due to flexing subfloor. Sub floor has concrete panel between tile and subfloor. What’s the best way to fix this? Thank you !
Question: I was waiting for you to explain how you were going to address the vapor and insulation issue causing condensation between the subfloor and flooring but you never did. Did you put a vapor barrier and insulation under the mobile home or fix holes in the existing vapor barrier and insulation? I have the same problem but worse. The plastic belly wrap was missing, insulation hanging, and my floors were bleeding on the Summer between the vinyl tiles because of condensation coming through the plywood subfloor and getting trapped under the vinyl tiles.
Except that rotten floor is going to deteriorate and come loose and put to much weight on the insulation and it wont be long before your insulation is laying on the ground and you have a mess with even more stuff to REPAIR. Repair does not mean COVER, HIDE, TRICKS, or BUDGET. Do it the right way the first time!
11:40 Jeff's surprised to find he's not the only one who knows about plywood :-)
I empathize with the frustration of handing the next person a piece of junk covered with something pretty. Wasteful, dishonest and SAD! However, I find it incredibly satisfying to bring everything up to code, solid and done right!! That’s where your incredible videos come in. Can’t thank you enough!! 😊
My hard wood floors are SO squeaky it drives me nuts and the kids. Help
Check your joists if you're able.. that's what I'm doing to identify problematic areas. Then I'm going to reinforce the floor by nailing them down. But ant issues with the joist should be addressed first.
Hope this helps.
Have a great day ❤
Saaaame.
Have you tried uninstalling the kids from the house?
You should use the floor squeek kit. I think Jeff talked about it a few years ago. Helped me fix a lot of my floors
I would check your joists first. They may need blocking or bridging installed between them before you can resolve the squeaking issue. If you can have someone walk/jump on the floor while you are underneath , then you can see what's moving. Most floors in homes built after the mid 70's usually have a 2x 6 or 8 depending on the joist installed between them bracing the adjacent joist, forcing the load out across multiple joists, and stabilizing the subfloor to keep it from flexing. If its true tongue and groove, the squeak is coming from the boards lifting on the nails/staples used to install it. Once the subfloor and joists stops flexing then, you can use a specialty flooring screw that has a snap off head. The screw gets driven down at an angle in-between the floor boards, and to has a stop ring of sorts on it, that gets buried in the flooring. Then the upper part of the screw is snapped off, leave very little indication that there was a screw installed.
Probably the stupidest question ever-roast me; I’m ready for it! So remember in the beginning when you the floor was so uneven you can stick a finger under it? Is it still uneven? I understand you laid new plywood…but wouldn’t new even plywood on uneven floor just make a new plywood uneven floor? I’m so confused! 😔
Answer is…. Maybe.
If you use luan as a substrate then most definitely unless a floor lever is applied.
If you use 3/4 then that would flatten it but it could be noises/ uneven In the long scheme.
Cover ups are exactly how it sounds,
Cheap way to make something look better but not always functional or practical. Possibly more expensive if done twice
I literally just finished doing the exact same thing last week. What small world! The only thing I did was add subfloor adhesive. It's a 1910 farmhouse with original TG fir floors, and they were getting springy.
well done! old t and g floors eventually break all the tongue and loose their strength
@@HomeRenoVisionDIYif the joists are rough cut oak, set 16 inch OC, would it just be better to just pull off the t & g, and install 1 in; or just use 5/8ths over the top of the t &g?
you mentioned someone left the old subfloor to rot, but ..... isn't that what you're doing? don't get me wrong I love your videos, just struck me as odd
much respect sir, been a floor guy for 37 yrs...saved up and bought a couple rentals for retirement and been watching you for a few yrs now...also been doing part-time mobilhome work and it's crazy what you have to figure out how they did things...hahaha...hope you enjoy your time here, you're one of the good guy's...how do you say it...cheers friend.
Thanks and Cheers David!
There is an ancient city built on a swamp. For streets, people covered the earth with logs. After a while, the logs sunk, so they added another layer, and another... Archaeologists counted 28.
I wish you could come and do my house lol. My house was a flip a few years ago before I bought it so the flooring isn't that old and I have soft spots in different areas. Unfortunately I learned after I bought it that the flippers didn't do a good job at all, they just covered things up. Anyway even though i'm not handy person I love watching your videos. I learn a lot!
I think the convo was more, "We're selling in a few years, we just need safe and make it look okay now, hopefully potential buyers won't notice."
Given the moisture problem, have folks already asked about the benefits of a vapor barrier before installing new subflooring?
I saw this guy with knee pads on I thought i'd gotten on the wrong channel !!!
LOL
Once you found the bathroom and half the hallway was done I would have just pulled up the bedroom and finished pulling the rest of the hallway and you could have had no transitions. Would look much nicer.
Thanks for your Saturday evening show,it helps me relax watching you teach. I hope you don't have a bad joist /problem with the soft floor by the kitchen. I'm sure we will see eventually 😁.
🥶🖤🔔👍🏻
the only bad joist we found was in the bathroom. that repair video is coming soon. Cheers!
Wish I saw this before my trailer flip I definitely removed the old sub 😅
I stacked subfloor in my bathroom to get a better transition between the original 3/4 oak outside the bathroom to the vinyl plank flooring inside. Along with screws i also used three construction adhesive you can get in foam gun cans. It's for subfloors, comes out like a foam but sticks tenaciously.
Mobile home door hinges never go back right without a fight
Hi Jeff! New member here ☺️ Love your videos! I asked a question on an older video and wondering if you respond to comments on those or if I should be commenting on new ones to get an answer? Need help! Many thanks :D
I went one step further and glued my replacement subfloor and that puppy is now rock solid
I couldn't help but chuckle - the finishing in my basement was paneling over paneling, because the paneling underneath was wet and rotten.
It was so bad that I could poke my finger through it, but they "fixed" it by just putting another layer over it.
Really expensive and difficult to repair, but buyer beware I suppose. :(
Ouch ... if you can't see it its not there I suppose😮
You can check a carpenter square by using a known straight like on a sheet of plywood and marking a line, then flip the square over and mark another line as close as you can to the first one, if it's a little off you can take a center punch and hit either the inside or outside corner depending on which way it's off. ;-)
Thank you! I’m on a budget. An old blind lady with sad strength. I’ve been replacing rotten wood under my fridge for months. Every step takes me forever. The rest of the floor does have weak spots. My joists are 24” on center. I just want the floor to last as long as me. Putting plywood on top seemed ok to me but I’ve been getting advice against it. Now I’m feeling more comfortable. Again, thank you very much!
definitely recommend the tonge and groove osb. it is stronger than plywood and costs less. Cheers!
Another wonderful lesson. Thank you Professor Jeff. I’m moving along slowly but working smart. I DONT THINK YOU SAID ANYTHING WEIRD. YOURE A GOOD SOUL ❤.
From a building science perspective, the code mandated crawl space ventilation attempts to defy reality. Hot warm moisture saturated air enters the cool crawl space and condenses. If a vent fan is installed to pull outside air in to the crawl space, the bottom of the floor will collect rain drop[s and rain down on the bare ground. The informed recommendation is often to install extremely heavy plastic sheeting with the sheets over lapped and vapor sealed to each other and the perimeter. To prevent rodent problems they recommend, 4 inch deep pea gravel both above and below the plastic sheeting. Supposedly it is impossible for them to dig because it rolls into its self. Then seal the crawl space and most important install an economical to operate whole house dehumidifier that pumps the moisture into a drain exiting the house. An informative experiment is to fill a glass or metal cup with ice and then add water. If you take it outside and set it on a hard surface, a puddle of water will collect around it. Often it can be shocking to see how much water the air holds. Matt Risinger is a big proponent of whole house dehumidifiers.
Future cable contractor likely won't use the old cable, and won't take time to remove and use existing holes, likely just drill into living room/office and run new cable to whatever rooms they want (or just to router for wifi nowadays). Up to you to seal all the holes nowadays, not like decades ago when they used grommets.
There is some kind of high pitched tone in the audio on this video, just FYI. Like a dog whistle in the background.
I noticed that too. It goes away much later so it's weird..
Lolol. The packaging is more dangerous than.....
I've seen people get frustrated with trying to slice that hard plastic, then try to rip it opened, and cut themselves.
Totally understood that comment.
Wish I woulda seen this a month ago...had the exact same situation, and I had an idea to do use this method, but I couldn't find any online resources on people who tried it! Ended up cutting out and replacing most of the subfloor. Joists all over the place, never on 16" center. Took so much time and many instances of screwing into nothing. Well, now I know. Thanks!
i been doing flooring for almost 5 years and what ive learned is home owners are cheap and they dont want to spend money to do the job right so i do what the home owner wants me to do
that is one market. the better market to work your way into is to have folks who will pay. That is how you increase your reputation.
This video seems contradictory concerning the various conditions of different parts of the floor. Now some schmuck (like a previous owner of my mobile home) may decide that they don't want to take the time or expense to replace a subfloor that really should be replaced. While replacing the insulation under my house last summer, I noticed that the particle board under the bathroom was flaking off badly in several places. This is in addition to the joists presenting with horrid decay.
So, I dig into my bathroom floor this year feeling more like a archeologist than a DIYer. The last owner put down some 7/16" plywood and stick-on tiles. Under that was 1" particle board with stick-on tiles. Under that was the original 3/4" particle board subfloor that someone pulled off the linoleum to put stick-on tiles down. With the removal of each layer, I was hit with the sight and smell of wet wood and the particle board just fell to pieces with a light tap of the hammer. My thoughts suggested that if the Good Carpenter himself saw this, He may take His own name in vain. What a mess!
Please be more direct about when it is ok to cover up old floor with good floor and when you need to be smart and just tear it out with a fresh start. I'll be replacing this floor with 23/32" ply topped with T&G OSB with a final layer of 1/5" luan for the linoleum. All this of course after I replace several joists and bottom wall plates. I am on a very tight budget (SS) so this is a BIG expense for me. Being disabled is a major set-back as well, but the local American Legion is sending help. Thanks for the videos.
Looks like you used CDX plywood. I'm planning a similar project and have been debating using CDX plywood vs BCX sanded plywood. How smooth does the plywood need to be for LVP underlayment? Is CDX good enough?
Based on my experience, a subfloor adhesive good be a good option, but a pretty expensive one. It'll give better sound insulation, adhesion, and vibration (from steps, etc) dumpening.
? Why not pull up old floor and check for other issues in duct work and plumbing. And replace with 23/32 advantech or 3/4 gp drymax.
I read elsewhere and was informed by a guy in the flooring dept at Lowe's not to attach the upper layer of plywood to the joists? Only the original subfloor should be on the joists. The upper layer is just attached to the subfloor with 1 and 1/4 screws (can use construction or sheetrock screws)? I have 3/4 sub floor and 3/8 plywood on top of that? Will that work?
How would you fix subfloor flexing in a tiled bathroom.?The grout is cracking and there is concrete panel between the tile and subfloor . Thank you!
what if you have particle board 1/2" over a subfloor that is squeaky? Romove the partial board first or go over with another layer of solid plywood 1/2" sheets with screws? FYI - the old particle board has 1000s of nails in it as well.
How did you raise up the sub floor near the wall to make the new floor level
So they did exactly what you said you were going to do with that first room? Just put plywood over the problem? I'm confused.
I think I'd have channelled the floor and run that cable to the wall.
You have to really watch these contractors these days. They are money hungry and if you dont know what to look for they will hide and get over on customers. Its no code of ethics in the contracting world these days. I recommend only using license contractors who are bonded and insured. Make sure you verify their licenses and paperwork before paying and signing any contracts.
Do you patch anything that is super soft? Or cracking? Or just lay the 5/8 over those spots and not?
I bought a manufactured home in 2019 and updated it watching your videos. I wish this series was out then. You are not kidding when you say you run into new challenges every day. Thanks to your videos I made a 50% profit on the home.
Me and my wife are thinking about buying our first home and there are soft spots all over and it was a flip from bad what are the odds they replaced the whole sub floor and didn’t just patch and try and level
Hey Jeff, would you reccomend just going over old subflooring if the origional subflooring is only nailed down? (Not screwed or glued)
If the existing subfloor is already exposed then no harm in throwing in some screws anyway IMO. Maybe not as many needed if you're putting another sheet on top. Just my 2c.
I really don't find a lot of value in the glue if you are screwing so save what you have and screw it in.
I would address it with the customer, let them make that choice. Some people just don't have the extra funds and may have HAD to fix a soft spot so soft they would fall thru if not fixed. Flooring is ridiculously expensive, then add the labor. I have installed floors for 27 years in Indiana
In this case I am the customer. I don't want to patch it knowing the whole house is a ticking time bomb.
@@HomeRenoVisionDIY then get your wallet out! 🤑
question can Bamboo Flooring be installed on your new dub floor ? thank you
What to do when the center of the room had a hump in it that was not there before it was moved. There are no piers directly below the hump issue. Same issue in several rooms.
Your manufacturered home will become too heavy for tornadoes and hurricanes to lift them.
This is JUST what I needed! If you weren't replacing the door trim would you just undercut it to make room to slide new subflooring underneath? Also curious about exterior doors etc. You would need to replace the threshold aswell? Thanks 🙏
I would use a multitool and trim the door casing
i had a single wide .. it was repo'd twice before it was mine ... i did the same thing ... raise the floor !! the new meaning! oh wait the expression is raise the roof .. oh well
Why couldn’t you start the full piece of plywood against the wall?
Can you do this on hardwood? Also, can you level the new subfloor at the same time?
best to remove anything with cleats or nails if possible.
So should you put plywood and hardi backer and a vapor barrier.
👀 lol Stella lol….you showed me so much plus what I learned from my dad it’s amazing what I can do now.
right on. on our way to helping 10 million, Cheers!
Great how it goes from "should be perfect the first time, perfect every time" to moments later "close enough".... Ya me too!
some hills just are not worth it to die on. Cheers!
What about going over old asbestos and vinyl flooring?
I've been working on this for months. What a nightmare.
You cannot use vinyl floor on you downstairs subfloor ?
You could have slid this piece in without cutting it in half. I get the theory and it would work wonders in some spots, but there it was just unnecessary.
would the cement type floor leveler be an option as well?
You need a stable floor before you use the leveler first usually.
Perfect timing! My mobile home flooring is swollen from various leaks and laminate floor was layed on top. Joints are popping. This is a 1975 single wide in Arizona 55+ park. I bought it right, but must be realistic. Surrounded by newer homes. I was just about to tear out bathroom subfloor. Plumbing is all replaced and roof is fixed, so cautiously optomistic. A little concerned about covering the soggy stuff, but think it should dry out with this 115 heat. Your thoughts?
the softness does not affect the strength of compression. your dry environment will keep it from going to mold. remember it is soft not wet. Cheers!
As a fellow carpenter desert rat that works in Phoenix but lives in Las Vegas, you should be good. Can always take things a notch further and get yourself a gallon of oil based zissner primer that blocks mold and mildew. Paint your subfloor with it, especially in bathrooms! Your future self will thank you should you ever have any leaks. It's a very small and cheap insurance policy to CYA. I did this in my house that I remodeled recently as well. I'm a commercial carpenter by trade and while many things apply, it's still a vastly different world in other regards. Haha I will say that hanging board on perfectly straight metal studs with self tapppers is way better than residential... minus code that requires 2.5x more screws.
Why not also glue down the new subfloor
gluing plywood to dust will have no effect!
Dewd, you bought a double wide in Florida . . ?
I did this exact thing in my studio space above my detached 2-car garage. There was only 1/2" subfloor over 24"-on-center joists (!!!). Needless to say, it was a bit springy. The extra 5/8" made it feel rock solid, and it's much quieter to walk on. Will be installing a vinyl plank floor over it soon, with help from Jeff's videos 👍
A "bit" springy???? You mean like a trampoline right? 😂 I have floors like that in my house too...
Your not being weird, they did a shitty job.
I recently found subfloor screws at a Menards in Wisconsin
Lol practically inches away from Canada's butt. Makes sense. 😅 Thanks for the find though. Not sure why they don't sell subfloor screws in more places through the US. Certainly can't find them down here in Las Vegas or Phoenix.
You said "This material has soaked up so much moisture that it was weakened because it's not plywood." But it looks like plywood to me when you removed the vinyl flooring. I don't understand.
That was part of the new subfloor that was replaced. He said someone had already replaced are part of the floor and used plywood.
It never ceases to amaze me when people cheap out and get lazy about the thing that is literally keeping them from falling to their death.
Gotta remember not everyone has money to fix things.
I would have preferred to live on the plywood and not installed the new flooring if money was an issue
Thanks for this demo, just what i needed. Question-- I'm repairing large, very soft spots in the bathroom. Will this method make a floor that's strong and sturdy enough to support a bathtub full of water? If your answer is yes, I'm going for it. Thank you!
but what if your floor is just so rotted? what do we do.
I have to replace some sub floor. I have been told that 5/8 OSB would be good enough. What do you think of using 5/8 OSB instead of 5/8 plywood?
I have t&g planks from 1973, they're in good shape but for the 1 room i tore up and did lvp i put 5 or 6mm underlayment down stapled to it. It was still pretty wavy. What would you recommend for me? Should i use thicker plywood going forward?
Ok question at 1:47 you show how from the 4 foot line to the wall has a nice gap. When filling in how do you aim to remedy the gap? I am just about to start work on a 1985 Single Wide in Indiana. My floors have 2 soft spots one in the hall and another in the closet of a bedroom. I am getting quotes currently for the roof to stop leaks they mentioned I may need more bricks.
I have new tile installed with no grout yet, and discovered some hollow spots. Would you recommend injectable Fix-a-Floor repair adhesive?
I purchased a manufactured home and I had to pull all the flooring up. I though the subfloor was soft, but found that there was way too much padding under the vinyl floor which was making it feel like I was walking on a mattress. The 3/4in particleboard is solid with no soft spots. Whoever put the flooring in decided to use self leveler on the particleboard and it is not level. I was told the best fix is to put 3/8in plywood over the particleboard and just staple it with no regard for where the joists are and where the “self leveler” is. It looks like you would recommend that I use screws and screw it to the joist?
can use bathroom drywall fro my floor.
What type of plywood do you use? Is it moisture resistant or do you need that? I found some CDX plywood that I’m thinking of adding to my existing subfloor but don’t know if I should do anything to protect the wood.
No Jeff your not weird its call the owner being a cheap ass. It happened to my mom's house our house is like that but holes are now in the floors :/ that's why I said you could make a video's fixing it lol.
Jeff I have to ask as I have been watching your videos and listening to you, wouldn't it be very expensive on adding the plywood over the top of what already there, especially like in my case in the bathroom the toilet sinks when you sit on it, which means I need to tear it all up and probably have to put in 2x4 or 2x6
My sellers hid rotten floors with shag rugs and the inspector missed it somehow....buy the house, first big rain 1 foot of water in the crawlspace. I put in a sump pump immediately.
Won’t this just increase the weight on the existing subfloor increases the risk of structural failure resulting in more damage over time then if done correctly?
I’m 25 years old been doing construction my hole life with my father and when I purchased my first home I noticed the subfloors in the 3rd level of the house (not basement main floor but upstairs) has a weak spot along the centre seems like it would be better to add another truss to increase weight on the subfloor before adding more above it
Starting at 8:30, those lousy cable wires belong behind sheetrock. I would use a drill and jig saw to cut out a piece of the original subfloor (if it's not accessible from a crawlspace), and wire the lines though the walls by using a sheetrock knife or roto-tool to cut a line even one foot above the floor, along the wall, to where they want it coming out. It would delay the project by a day, but the alternative, of having to live with that crap forever, sticking out of the ground, always makes it worth it.🙂
I understand about the budget, but how much would cost to shop vacuum up all the stuff between the layers. Also the expense in the adhesives between the layers is not cost prohibitive in the long run. For all the time it takes, add some more screws. Once the flooring and baseboards are done then you find a squeak. Then you slap your forehead with the palm of your hand.
I haven’t watched the whole thing, but make sure the soft spot is just subfloor, and not a cracked floor joist, like I have 😢
If you're not into all the math on those complex shape challenges, you can make a template out of cereal box cardboard and masking tape. Especially in tight fiddly bathroom situations. I find that easier on my brain.
Its a trailer, function over form .... I need a roof, walls and heat ... everything else is a luxury
I'm a little confused with the plywood part in the first bit. Is the other end against the wall on the other side? I understand screwing the plywood on the joist. I just don't know how to find in the floor cuz mobile home floors suck ass.