why don't bathtubs have insulation inside the frames?

Question

the water would stay hot longer

Answer 1

My guess would be because if you get insulation wet it does two things, concentrates salts with soaking and wetting, which leads to corrosion, and tubs are made of metal (usually) that rusts. The use side is heavily coated, the underside not so much, but still is, but this would cause the tub to corrode faster, and also it would mold...and since it's on the underside of a fixture that you'd not have easy access to would be difficult to remove and could cause allergic reactions and/or spread of the mold.

Answer 2

The greatest heat loss isn't through the bathtub material, but through the open air. So insulating the bathtub will not have any impact outside of raising the price of the bathtub when it is brought.

Answer 3

Good idea. I guess the cost of insulating them is greater than the cost of running a little more hot water in the tub.

Answer 4

Its a cost factor, plus it adds more weight to the tubs, and may be harder to handle by the homeowner who is putting in his own bathtub.

If you can get to the tub, through the flooring, or if your just putting the tub in new, then you can shoot the foam around the edges and down the sides, to your hearts content.

Also, remember, the "foam" does degrade, (the one in a can after so many years). So, be aware of that.

I would get that "great stuff" in a can, as it expands at a pretty good pace and rate...

I wish you well..

Jesse

Answer 5

You know air also acts as an insulator for example double panes glass in the windows, the two panes of glass don't exactly have regular air but it is some sort of gas

Answer 6

I would be okay with a clear domed top with tiny breathing holes in the top to keep a good HOT bath!

Answer 7

its upto the home owner to decide, but now new homes are so air tight i wouldnt worry about it?