small swimming tub for two people

[tim armstrong]

The hot weather has finally taken it s toll. My wife has given up on the idea of a pool in the garden, thankfully. But she now has the clever idea that we could have a small rectangular plastic/ rubber or fibre glass structure on our upstairs balcony. Longer and wider than a bath, but about as deep. Any sensible ideas about suppliers and materials would be much appreciated. The floor is very solid, but concrete is probably not a good idea. Thanks.