Bulging Screwheads Not ScrewPops...4 Year Problem

georgiamudman

We have been having a problem with high-end drywall construction for 4 years. We are screwing and gluing and sanding the screw heads after 3 coats. The house is fine while it sets, but when the heat is turned on there is usually a paper thick film of compound bulging on the screw heads. We are properly setting the screw heads and not breaking the paper. We have tried many different types of compound, glue, and screws. We are leaning toward moisture in the lumber, but in some cases it happened in both existing framing and new framing. Anyone else having this problem or does anyone have any ideas for a remedy? Thanks

Tom R

You're probably using 1 5/8" screws, - - use 1 1/4" or even 1", - - you'll get less shrinkage along the screw length.

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TimNJ

Any of these jobs involve trusses or really long spans?

drywaller56

do you notice this before or after it's been painted?

georgiamudman

Usually large trusses in these houses. The problem is happening on almost every screwhead on the walls and ceiling. Usually in the middle floor of the house. We have seen it before the houses are painted and after. It just depends on when the heat is kicked on. They are so much easier to repair when nonpainted. Thanks

drywaller56

how are you finishing them without the heat being on? What are the conditions when you do the finishing?

georgiamudman

The temperature is moderate enough in Georgia to finish without the heat being on. The drywall is usually done without the heating and air being operational. Space heaters are used if needed. The conditions vary, but the problem usually happens after the homeowner has moved in and turns on the central heat and air.

S&P Builders

are you using a premix, or not? we always use easy sand 90, tow coats, and then a plus 3 third. have never had a prob, and dont sand them either

Peladu

Thats an extreemy long time to have the problem, but is a seasonal problem, or only happens with a certian builder?.

I (once again) would have to agree with Tom R. It sounds like you may be using too long of a screw.

Next time, use a moisture meter on the lumber and see what it says.

Afetr four years, you should at least have the conditions figured out.

A+Carpenter

It is the lumber pushing the screw out. The lumber yard is demanding lumber faster then the kiln can dry it. TRUST ME I AM PROFESSIONAL. I would back the screw size down as said above also.

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