Quote:
Originally Posted by Gerry
If you can get access to under the tub, you can firm it up with a can or 2 of the expanding spray foam you can buy from any hardware store. You may need to find hose to extend the reach of that plastic straw that comes with the can (same hardware store). Find something heavy to put in the tub to weigh it down (I like sand bags). shoot the foam in underneath it, and leave it alone for the full cure time it says on the cans directions. It will feel rock solid next time you go in it.
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Works great, but DON'T OVERFILL WITH SPRAY FOAM !!!! If you do, you may find the sidewall of the tub or even the sidewall of the trailer "slightly bulging beyond its limits".... BTDT... There is a "non-expanding foam" and a "limited expansion foam" available in cans. The "grows to fill every space" type of foam can be dangerous in the hands of someone who thinks "a little bit more is better"...