Over boarding ceiling

[Nath89]

Hi i am in the middle of renovating my house that we boght two mounts ago. I have over boaded most of the ceilings and all have been lath and plaster. I am just in the process of finding the joists in the bedroom and found out it has been overloaded in the past, probly along time ago as it has a Gray thick type paper on the front of the plaster boads also fixed with nails. My question is can I over boad this once more as I already have the boards or would it be best to skrim the few cracks and then skim over?

 

[PrenticeBoyofDerry]

Depends on the joists, if they can take the additional weight of another layer of boards and plaster?
Go ahead!

 

[Nath89]

The two joists I have found are about 1 3/4 inch so could probly take it but after peeling all the wood chip off its seems pretty sturdy and only has two cracks. I'm thinking I can take the boards back, but am I cutting corners will it crack and need over boarding in the future.

Thanks for the reply nath

 

[PrenticeBoyofDerry]

Generally you have pre-existing boards, that are starting to sag and crack. It's a case of screwing back up tight and joint taping any cracked joints, then PVA (two coat) primer. Prior skimming.
Just be careful when screwing up, with regards to plumbing/electrical services.

 

[Nath89]

The thin crack runs paralle with a joist then off at a right angle, so probly at the edge of a board. How do you sugest I find the joists to screw with out putting holes all round the edges, would it be best to punch down from the attic? And how often would you screw?

 

[HERTS P&D]

What's wrong with making holes in the ceiling? you are going to overboard it anyway.

Andy

 

[Nath89]

That's what I am trying to figer out but think it isn't sagging much at all and feels sturdy so think the other way suggested is the way to go.

 

[PrenticeBoyofDerry]

If you have access from above, I generally drill down at edge of ever joist, both ends of span.
Then you can snap a chalk-line across them below, making adjustments for joist centres.
Then it is easier screwing up at centres.
Screw every 150mm to 200mm.

 

[Nath89]

Thanks a lot buddy I have found center on the other cielings by punching a thin screwdriver thought til I find both edges and chalk line. This one is more difficult as its alot more punch through think al do as you suggested, go in the loft. How often would you sugest screwing the same as if I was putting new plaster boards up?

 

[gregers]

iirc it used to be 72 nails to a board,and when i do it im around that figure for screws.

 

[PrenticeBoyofDerry]

and what size boards did you nail?

 

[Nath89]

I was thinking every 12" as its just making sure the original nails don't pull. That sound about right?

 

[PrenticeBoyofDerry]

between 150mm and 200mm, is best. 6" to 8" in old money!
And tap up any nails that pop out.

 

[Nath89]

Thanks for the sound advice bud don't think I would gane anything by overboarding and save me lifting them up

Thinks again nath