I know this has been asked before when using spray foam for bathtub support
but hear me out :)
initial problem with tub was that it bowed in the center when in use and wo
uld pop back to place minutes after its use. first plumber opened an access
hole and stuffed in shims and spray foam along sides fixing some how the i
ssue. of course they did not check around the drain area before closing up
the wall and taking off.
im assuming they did not fill the tub with water before applying shims and
spray foam as it might have lifted the tub slightly causing the right side
of the bath tub drain to sink making a bending noise each time some one ste
ps around it. ive uploaded some videos to youtube of the bathtub noise and
another video of the first fix.
first video; https://youtu.be/hFtYCOS_jpQ
second video; https://youtu.be/Fp91BO2O280
spraying additional spray foam around drain leading to tub drain, would tha
t cause any issues with the drain? stepping on the area inside the tub you
can notice the drain move slightly. need added support around that area.
On Wed, 20 May 2015 15:12:45 -0700 (PDT), Rafael Anaya
*snip due to poor word formatting*
Sounds to me you have a really cheap tub, or else someone using it is
way overweight. If the drain flexes, you will eventually develop a leak
in the pipes.
Solutions are to either get a better tub, or go on a diet.
Or just live with it until something breaks and causes a flood, which
could lead to more damages to the house. I worked as a did plumber for
years and I never saw a tub flex like you explain, nor did I ever see a
tub with shims or spray foam under it.
On Wed, 20 May 2015 20:48:02 -0400, email@example.com wrote:
They must be selling some real crap tubs.....
That was unheard of in the past.
There are so many building codes these days, and some of them are darn
near senseless. Yet they allow crappy tubs like that....
Dumb, dumber dumbest....
I'd hate to have to try to repair the drain pipes on one of them, and
even worse, try to replace one of them tubs.
This proves one of the things I always say. OLDER IS BETTER!
I don't personally know what type of filler is usually used to support
underneath a tub, but I guess that spray foam is one option that people use.
It also appears that your tub may be on a ground level or concrete floor so
you may not be able to access it from underneath.
But, given what you wrote and what the videos show, I think if it were me I
would open the wall up again and apply more of the same type of spray foam
under the drain area that was used around the sides. It seems like it just
needs a little more support in that area. I would try not to overdo it and
do it in stages so the foam doesn't lift the tub up or cause it to buckle up
in that area -- I would just do it in stages, a little at a time.
I also don't know whether it would be better to fill the tub with water
first or not. My inclination would be to fill the tub and then do the spray
foam with the tub full.
These are all guesses on my part but maybe others here will know better than
me what would work best.
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