permanently flooring over indoor swimming pool advice please?

[calvert]

I have a 4.5m x 9m indoor swimming pool that I want to cover over so I can make the building into a granny annex for us to live in (the kids are having the house).
I'm after advice for the best way to do this please. Thanks

 

[Tigercubrider]

I'd be tempted to floor over rather than fill in, as when you're...er...no longer there, it could be reused?
Also might be useful as a storage facility. I'd guess filling in is more expensive than covering. Assuming that the structure is ok with no water long term?

Either joist hangers fitted to the edge or joists right across?
Is the building ok for insulation?

nor not a Cummings are you?

 

[RandomGrinch]

Reminds me of this episode!:
https://www.channel4.com/programmes/kirstie-and-phils-love-it-or-list-it/on-demand/68198-006
There are some images of the construction techniques used.
(Series 4, Episode 7)

 

[Bodgedbuild]

I'd at least fill it with ballast of some sort, a friend of mine built an outdoor pool but left it empty until he got the cash together for tiles and a tiler. In the winter the centre started to dome upwards and the entire thing started lifting by a few mm a day. He believed it was effectively a boat because the water table had risen. He had to fill it with water again until he got it repaired. It dropped back down once water was in it.

 

[calvert]

Many thanks for the replies. Its on a slope at the top of a 5metre hill so I hope the water table wouldn't rise.
Random Grinch, thanks for posting the Chanel 4 programme. That looks like a good solution. Would the jabfloor need oversize on top or just screed? Thanks

 

[Bodgedbuild]

Many thanks for the replies. Its on a slope at the top of a 5metre hill so I hope the water table wouldn't rise.
Random Grinch, thanks for posting the Chanel 4 programme. That looks like a good solution. Would the jabfloor need oversize on top or just screed? Thanks

I'd check on the water table, my mates house is on a hill and still gets a high water table a few times a year. The water table often stays roughly the same distance from the surface even on a hill.

 

[JP_]

Is it deep enough to be a little basement of sorts. Wine cellar?

 

[freddiemercurystwin]

Obviously ignore the waterproofing layer, this was not a conventional building. You might need a dpm under the slab though.

 

[Scarlet Pimpernel]

Municipal swimming pools used to floor over the pools during the winters, for other activities.
If you could find any of the old boys that used to work in such areas, I would think their advice would be invaluable.

 

[calvert]

Much appreciate the replies. Thanks Freddie, you have basically answered my question in one. Unfortunately, it isn't deep enough to use as a basement so that's out. Thanks again for all the advice