Hi

 

I have recently insulated and plasterboarded a ceiling . I put silver aluminium foil tape around the perimeter of the insulation. I now want to fill the gaps between the plasterboard ceiling and walls. There is aluminium foil within this gaps, both at the back and a little on the wall. Is it ok to use filler directly in here or will the aluminium foil need primer (or something) to help the filler adhere?

 

If it makes any difference I've got Toupret filler. After filling I was planning to finish with caulk before decorating.

 

Many thanks

Can you cut this back at an angle first, with a sharp blade, so there is a valley for the filler to go into?

Thank you for the reply.  

 

There is already a gap between the end of the plasterboard ceiling and the wall.  Does that not count as a valley?  

 

I'd be reluctant to cut the PB more as some of the screws were already quite close to the edge due to slim joists.  

 

Also, even if I did cut the PB that wouldn't change the ali foil situation...  

 

Ta

 

PS - also, will the exposed/non paper-lined plasterboard at the edges need sealing before filling?

Edited June 3, 20233 yr by Oxbow16

Are the walls plasterboard also as you could use gyproc paper joint tape.

Thank you.  No, all solid walls.   And just to be clear, I won't be skimming. I'm planning to paint the plasterboard as is, after going around the perimeter edges and filling screw heads. I'll prime/seal the plasterboard before applying the final paint.

 

Cheers

14 minutes ago, Oxbow16 said:

Thank you.  No, all solid walls.   And just to be clear, I won't be skimming. I'm planning to paint the plasterboard as is, after going around the perimeter edges and filling screw heads. I'll prime/seal the plasterboard before applying the final paint.

 

Cheers

What space / which room is this? 

It's a bathroom.  Ta

Ok, so you’ll be taping / filling aka dry lining? If so, just use the paper tape as said, filling the valley with filler first. Then sand it out. 
Me personally, I’d skim it. Much better job and by the time you’ve filled taped and sanded, the plaster would have been done, finished and in the pub. 

Thanks for the thoughts, but it is a really small room with only one join.  So we decided not to skim.  We'll just fill the join and will be putting a fake beam to cover (old house, so will suit).  

 

So really just need to know about the use of filler over the aluminium tape, and the PB edges - whether they need priming/sealing first and if so with what?  

 

Thanks again  

as has been said, dry lining paper tape will work. 

3 hours ago, Oxbow16 said:

Thanks for the thoughts, but it is a really small room with only one join.  So we decided not to skim.  We'll just fill the join and will be putting a fake beam to cover (old house, so will suit).  

 

So really just need to know about the use of filler over the aluminium tape, and the PB edges - whether they need priming/sealing first and if so with what?  

 

Thanks again  

There's nothing that will stick to the aluminium tape, hence me asking you to cut in at an angle and remove the aluminium tape / create a valley in one action.

Also, to answer your other question, yes you will need to prime the open surfaces of the plasterboard with 50/50 PVA/water and do that a few times until it doesn't soak in any more, then a neat coat of PVA immediately prior to fillering.