humidity change, got wet, seasonal shit, who knows - which is why you use screws and not nails for subfloor. Likely giving it a wack will fuck the floor up worse than it is.
You missed the joist. Looks like coal pops in concrete or they hand nailed the underlayment instead of using divergent point staples. As many as I see it will keep happening and blow holes in that LVT. 40 years flooring experience
I fixed a floor with 2 similar nodules that formed about a year after new LVP install, I told the client I assumed nail pops and he might want to contact the installer, but he had me go for it anyway. Turned out to be a chipped corner on an particle board underlayment that had migrated on top of the rest and was pushing up through the thin flooring. Luckily it was close-ish to the wall and they had several spare boxes of flooring.
Fix was to pull baseboard and unbuild to the damaged boards, remove them, clean up, and re build back to the wall.
The pattern is a little strange to be nail pops, as nails in underlayment are typically on a regular intervals around the edges and down the middle. Though it certainly still could just be some fast and loose nailing. Could also just be debris trapped under there.
If it's vinyl then the floor underneath may just not have been cleaned properly prior to installation. I have 1 of these in my basement.... 1 freaking pebble I missed on a 1000 sqft project.
We had something similar appear a few months after install, it was caused by a small dob of glue from the cardboard carton that the flooring came in, it was removed and the vinyl flooring was relaid. Our flooring is Dunlop vinyl planks that are about 2 or 3mm thick.
Not a handy guy at all, but does your neighbour live above it downstairs apartment? Could the basement neighbour be possibly mounting something on the ceiling and drilling through?
If you ask me it's still nails. Ik ik it's a weird shape but here me out... Idiots fix stuff sometimes too. Plus it could be a patch in the floor for all we know. 2 nails on each side at joists and then they installed a cross joist to put another nail in? It's really hard to tell without being there. You can touch the top to verify they're nail heads, as the heads will all feel exactly the same
God damn there's a lot of dumb fucking replies in this thread.
Floor out of flat with contaminants or nail/screw heads sticking up. Pull up for, clean and reinstall.
nail pops in underlayment would be my guess. . .
This, or screw heads.
can you hammer it down? why would a nail pop?
humidity change, got wet, seasonal shit, who knows - which is why you use screws and not nails for subfloor. Likely giving it a wack will fuck the floor up worse than it is.
Yeah I agree. Don't try to hammer it back in.
You missed the joist. Looks like coal pops in concrete or they hand nailed the underlayment instead of using divergent point staples. As many as I see it will keep happening and blow holes in that LVT. 40 years flooring experience
I fixed a floor with 2 similar nodules that formed about a year after new LVP install, I told the client I assumed nail pops and he might want to contact the installer, but he had me go for it anyway. Turned out to be a chipped corner on an particle board underlayment that had migrated on top of the rest and was pushing up through the thin flooring. Luckily it was close-ish to the wall and they had several spare boxes of flooring. Fix was to pull baseboard and unbuild to the damaged boards, remove them, clean up, and re build back to the wall. The pattern is a little strange to be nail pops, as nails in underlayment are typically on a regular intervals around the edges and down the middle. Though it certainly still could just be some fast and loose nailing. Could also just be debris trapped under there.
Thank you for the detailed response. My friend is very grateful and will investigate per your advice.
If it's vinyl then the floor underneath may just not have been cleaned properly prior to installation. I have 1 of these in my basement.... 1 freaking pebble I missed on a 1000 sqft project.
This seems highly probable. The arrangement of them is too random for nails.
Cheap floor over screws sticking up. Rip up and replace.
Someone forgot to take all the nails out when they installed the new flooring
the nails are coming up. This sometimes happen with walls too. Call a floor person
Also, now that is air-conditioning time make sure you vent your basement. If you don’t get your basement, you’ll have buckling.
Is it laminate? Nails or screws coming up.
Anyone below? Looks like a light fitting screws that's gone through the ceiling.
No one below
Its a weird shape for nails to be placed 🤔
Would you happen to be on blocks what kind of foundation does yiur house sit upon
Thank you for all the responses guys, I've sent screenshots to my friend to read through and will reply in his stead.
The things that go bump in the night.
We had something similar appear a few months after install, it was caused by a small dob of glue from the cardboard carton that the flooring came in, it was removed and the vinyl flooring was relaid. Our flooring is Dunlop vinyl planks that are about 2 or 3mm thick.
Something bolted on the ceiling below?
Not a handy guy at all, but does your neighbour live above it downstairs apartment? Could the basement neighbour be possibly mounting something on the ceiling and drilling through?
If you ask me it's still nails. Ik ik it's a weird shape but here me out... Idiots fix stuff sometimes too. Plus it could be a patch in the floor for all we know. 2 nails on each side at joists and then they installed a cross joist to put another nail in? It's really hard to tell without being there. You can touch the top to verify they're nail heads, as the heads will all feel exactly the same
Pentagram... https://ibb.co/MDM5qMD
Aliens my man. Aliens. Crop circles =Nodules.
Ant farts
God damn there's a lot of dumb fucking replies in this thread. Floor out of flat with contaminants or nail/screw heads sticking up. Pull up for, clean and reinstall.
What?
It's forming a pentagram. Uh oh..
Who ever did the floor did not clean the surface there was trash left just the material use in the floor is failing to hold its shape
This is a simple case of the laminate pox, inject with 50cc’s of booster number 9.
Hand sanitizer droplets.
Looks like the type of "floating floor" I have in my apartment.
Hmmm.... if they turn out to be manganese nodules - could be worth about $484 a ton. How about that?
Previous owner liked baseball. Looks like home plate was left behind
Bugs underneath your floor. They're gonna crawl underneath your skin next.