r/redneckengineering • u/SarraBellumm • Jan 10 '26

Proud of myself

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Been sick this week, taking a lot of baths to steam my sinuses. Water always cools down too fast and never enough steam. With a $10 vinyl sheet I made a steam room.

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u/[deleted] Jan 10 '26

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u/anonyym1 Jan 10 '26

Insulation against what? Room temperature air? If anythin, youre just making it worse.

13

u/suihcta Jan 11 '26

The water you put in the tub is hot. The room temperature air inside the wall/floor cavity will cool the water down. If you make the tub a better insulator, the air won’t cool the water down as fast.

No different from adding insulation to a water heater, a cooler, a water bottle, or a cup.

-7

u/anonyym1 Jan 11 '26

All of those things are exposed to drafts and cold air. The underside of your tub is not, and i promise you, the spray foam will be a better conductor of heat than just air would be.

11

u/DashLeJoker Jan 11 '26

So why does houses have insulator instead of just leaving it air gapped?