We are planning to build an Indoor Pool, free-form (or, if feasible, an Indoor/Outdoor pool). Does anyone have any experience with an Indoor Pool in LOS?

This is a question not so much on the build (already covered here well), as on the issues related specifically to indoor or indoor/outdoor pools.

In particular, we are trying to get a handle on the following (and other issues we have not thought of):

1. Managing the "environmental" issues of an Indoor Pool in LOS climate and what we should expect - ie, issues of molding, chemical build up when away for weeks at a time, anticipating and managing ceiling/structural dangers of corrosion from pool chemicals, etc
2. Feasibility of building a below-ground indoor pool in an existing home - ie, foundation issues, etc
3. Zoning issues typical of Developments in LOS (Mu Bans) that might restrict an indoor pool
4. Flood-protection measures we can take

For background, we are planning a concrete free-form, with steel reinforced gunite shell, capped horizontally with coping, and marbelite plaster surface. We are hoping to do a natural/stone/garden river shape, which would form a tropical-garden effect inside the home on the ground floor with waterfall and jacuzzi, and connect to outside patios/trees. Total length would be about 30m, with narrow (2.5m) and wide points (10m). We are actually hoping to do it as low-chemical as possible or salt, but are evaluating the high-chlorine approach/equipment first.

We are hoping to do this on an existing home, bought second hand, in Bangkok. Dimensions approximately 373sqm house in wall, 2 stories.

Thanks for your help!

Did build an indoor pool for a customer few years ago and didn't have special issues (except undergound water during construction that was solved by pressure evacuation points)

You need good aeration and salt chlorinator is the best possible choice.

House foundations can go between 60 cms to 1 meter from the post, check original drawings if you have them, if you can you have to stay 20 to 30 cms to these limits.