Gap along precast concrete bison.

[tony7]

Hi,
There is a gap about 10ft long in my friends living room ceiling, its about 3-4mm wide in places and there is also a slight step in the middle of that 10ft run where the two slabs are meeting.

What's the best way to fill that gap?

Thanks in advance.

 

[tony7]

Anyone

 

[endecotp]

I've been trying to work out what you typed that got auto-corrected to "bison", but my imagination has failed me.

Photos might help. Obvious but unhelpful answer is "filler".

 

[tony7]

Hello, no, it is bison or what ever they call them now. Concrete slabs, instead of flooring joists they are concrete slabs butted together. The ceiling was skimed as normal but now there is a small gap of about 3 mm wide down along the joint. Thanks for looking.

 

[tony7]

Yes, filler of some sort is right but what kind? and would something need to be applied to the ceiling first like a sealer or something.
Thank you.