trimco

I am a trim carpentar and need some help with a drywall question. I am putting up crown and decorative wood beams in a first floor room, above which is a bedroom. The house is two years old. Ceilings are drywalled and flat. Floor joists in the bedroom are "TJI" type. They span about 14 feet. The homeowner says that everytime her son walks around in the bedroom above the room I am trimming, she hears creaks and "pops" with every step he takes. She thought maybe the builder did not nail down the floor in the bedroom. I checked and the plywood (3/4' tongue and groove") looks glued and nailed pretty good to me. There are no visble sags in the drywall. The builder insulated the floor of the bedroom with blown insulation after the drywall was installed.
I cannot figure out what is making the ceiling "pop". Someone told me maybe the drywall is not screwed tight to the TJIs. If that is the case, can I just rescrew the drywall and pull it tight to the TJIs. I would rather try to give this lady some type of fix before I crown and trim her first floor room.

Any advice is appreciated.

Trimco

RowdyRed94

It's remarkable how noisy some floor systems are, but I seriously doubt it's the drywall. The natural sound deadening characteristics of gypsum sort of rule that out. I'd guess it's either poor quality joists that are creaking, poorly fastened ductwork that moves with the joists, or poorly glued/nailed subfloor. Most of our callbacks for floor squeaks are due to expandable steel braces installed by mechanical or electrical contractors that are just "stuck" to the joists with the sharp points and not nailed in.

You might try running some 2-1/2 inch deck screws through the carpet in a few of the worst areas to rule out subfloor issues (be sure to watch carefully for pulled threads in the carpet - spread the fibers and place the screw carefully!).

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trimco

Thank you for your reply. I start the job next week. I think I will pull back the carpet and try screwwing down the deck material. I can't believe it could be the drywall but the noise is not the typical squeeking. It's more of a "popping sound".

Trimco

DoubleM

Was there ever any resolution to this? I'm having the same problem ... 13.5 foot span TJIs every 16 inches. The subfloor is glued and shank nailed everywhere and screwed in some places. The noises started primarily after drywall installation. It cracks with every step. I can recreate the noise by lightly pressing on the ceiling below.

AtlanticWBConst

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Celtic

The house was demoed and rebuilt using all poured cement walls and floors ~ no more squeaks

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Tim0282

I bet the top piece or the bottom piece isn't glued very good to the OSB in between, on the floor joist. That seems like it could be the case, but sure is easier to blame the drywaller. Wonder why we are such an easy target.

DoubleM

The noise did not start until after the drywall was installed. Beyond that, the floor was glued, shank nailed, and screwed.

Frankawitz

Drywallers more then likely didn't press the board into the glue that's if they glued and screwed it at all. But you did say if there was any nails or screwheads poping out. I would say it's the glue or a gap. what size board was used on the ceiling 1/2" or 5/8" maybe board flex and the gypsum might be cracking but not ripping the paper, I would look for fine lines in the ceiling.


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DoubleM

Only screws were used ... no glue. 1/2 inch drywall. The board flex and gypsum cracking makes sense given the TJI's are designed to flex (length inches/480 inches ... 1/3"). If it is the gypsum, will the noise go away eventually after all the gypsum has cracked? Thanks so much.

Frankawitz

I got a feeling the 1/2" board is the problem, if they would have used 5/8" I don't think the ceiling would be flexing like it is. with those type joists in place you would think they would have installed 5/8" board. I also wonder if they put in enough bridging between the joists to give them more stability, boy this one is hard to pin down what is going on, not knowing how the laid the flooring system. I have seen crews cut corners to save time and money. then being your past the 18 month warranty the builder is free and clear at this point. the only thing that might work is screw it down every 8" oc. up and down every joist. then your looking at floating the whole ceiling. or you could double up the ceiling with another layer of 1/2", then you have the dead weigh issue. or demo the ceiling and start over using 5/8" tuff call either way. Good luck


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Aaron111

as a pro drywaller I would suggest you use all 5/8 thick drywall - and stopp all the problems tell your client to yank out the 1/2 inch problem solved

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