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Fortuna_725 Dec 2015 10:31I hope it’s okay to post this here since people might be more knowledgeable about insulation and mold issues.
I am planning a large water tank (4.8m x 2.2m (15.7 ft x 7.2 ft)) in the basement for animal husbandry. The entire tank is made of fiberglass reinforced plastic (FRP) and rests against three concrete exterior walls. The tank is 1m (3.3 ft) high, and the room height is 2.5m (8.2 ft).
The water temperature will be around 25-27°C (77-81°F). The air temperature will be about 27-35°C (81-95°F). So the environment will be very tropical and humid, with relative humidity around 80-90%.
Now to my problem.
I want to protect the three concrete exterior walls that the tank touches from moisture and mold. Additionally, I want to add some thermal insulation so I don’t waste too much energy heating the tank.
I’m considering the following wall construction:
For the exterior wall up to 1m (3.3 ft) above the finished floor level at the height of the tank: exterior wall, Lastogum coating, 20cm (8 inches) expanded polystyrene insulation, FRP tank.
For the exterior wall above the tank, from 1m (3.3 ft) finished floor level upwards: exterior wall, Lastogum coating, foam board (Wegiplatte), Lastogum coating, tiles.
Now I’m wondering if this is sufficient or overkill. Key points: dew point shift, mold growth inside the wall? Vapor barrier?
I am planning a large water tank (4.8m x 2.2m (15.7 ft x 7.2 ft)) in the basement for animal husbandry. The entire tank is made of fiberglass reinforced plastic (FRP) and rests against three concrete exterior walls. The tank is 1m (3.3 ft) high, and the room height is 2.5m (8.2 ft).
The water temperature will be around 25-27°C (77-81°F). The air temperature will be about 27-35°C (81-95°F). So the environment will be very tropical and humid, with relative humidity around 80-90%.
Now to my problem.
I want to protect the three concrete exterior walls that the tank touches from moisture and mold. Additionally, I want to add some thermal insulation so I don’t waste too much energy heating the tank.
I’m considering the following wall construction:
For the exterior wall up to 1m (3.3 ft) above the finished floor level at the height of the tank: exterior wall, Lastogum coating, 20cm (8 inches) expanded polystyrene insulation, FRP tank.
For the exterior wall above the tank, from 1m (3.3 ft) finished floor level upwards: exterior wall, Lastogum coating, foam board (Wegiplatte), Lastogum coating, tiles.
Now I’m wondering if this is sufficient or overkill. Key points: dew point shift, mold growth inside the wall? Vapor barrier?
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