Ceilings -how are they fixed ??

[jack_s]

How is a room ceiling fixed ??

The ceiling plasterboard in part of a room has dropped about 2 inches.

Looking in the gap (between ceiling & board above it) it seems the fixings have pushed through the ceiling in that part of the room.

The ceiling plasterboard seems fixed to board above and this board I assume is fixed to the joists (I cannot see joists).

1) Are they just long screws with washer type things to hold plasterboard or special ceiling fixings ??

2) What is the board above the ceiling plasterboard, is it chipboard ??

Thanks
Jack S.

 

[jbonding]

normal drywall screws are used depending on the thickness use longer screws, it sounds as though its got a double skin of plasterboard.

 

[jack_s]

normal drywall screws are used depending on the thickness use longer screws, it sounds as though its got a double skin of plasterboard.

I've used some No10 4" chipboard screws with washers to pull up the hanging plasterboard in a few places.

They screwed in ok & I didn't know where joists were.
I picked random places to screw in.

I don't think chipboard screws would hold in plasterboard, so that makes me think the board above ceiling plasterboard is more solid chipboard or similiar.

Jack S.

 

[jbonding]

normal drywall screws are used depending on the thickness use longer screws, it sounds as though its got a double skin of plasterboard.

I've used some No10 4" chipboard screws with washers to pull up the hanging plasterboard in a few places.

They screwed in ok & I didn't know where joists were.
I picked random places to screw in.

I don't think chipboard screws would hold in plasterboard, so that makes me think the board above ceiling plasterboard is more solid chipboard or similiar.

Jack S.

stainless steel?

 

[jack_s]

stainless steel?

Doubt if they're stainless steel, think they're Zinc.

Why do you ask ??

Jack S.

 

[jbonding]

they may rust in time

 

[jack_s]

I've used some No10 x 4" chipboard screws with washers to pull up the hanging plasterboard in a few places.

They screwed in ok & I didn't know where joists were.
I picked random places to screw in.

I don't think chipboard screws would hold in plasterboard, so that makes me think the board above ceiling plasterboard is more solid chipboard or similiar.

What do people think ??

Jack S.

 

[martybli]

The screws would not hold if the above board was plasterboard. Why don't you use a screw driver and make a little hole in the above board to see what it is made of? If your house is old it may be an old lath ceiling which is made up from thin timber laths which are plastered over. You may get screw to bite in this but finding the joists would be better.

 

[jack_s]

The screws would not hold if the above board was plasterboard. Why don't you use a screw driver and make a little hole in the above board to see what it is made of? If your house is old it may be an old lath ceiling which is made up from thin timber laths which are plastered over. You may get screw to bite in this but finding the joists would be better.

I've just realised what I think it is/looks like, 3-5mm Hardboard.
(doesn't look like the thicker/heavier chipboard).
-I couldn't think of the right word.

I have restuck ceiling paper back.
I should have thought of pushing screw driver up to test beforehand.
(I started wondering about this board afterwards).

The board above the ceiling plasterboard did not look old.
When pushing up screws to screw in, it felt like this board was flexing, before screw went in
(as thinner Hardboard sheet would).

Won't lathe & plaster have a rough type finish ??

Thanks
Jack S.