I'm planning to put a jetted tub in a bathroom, but I'm concerned that
the floor may not support it adequately. I understand I need 15lbs per
square foot?? How far apart should the joists be, and if they are not
close enough, how can I improve support?
what's there now ? how long are the floor joists, what dimension
(2x10 ?), and how far apart (16" ?). where the tub would be is there
a wall underneath to carry the load down, or do you need to depend on
the joists ?
Don't count on that. Find out for sure what the spacing is. There are
a few products out there now that only require floor joist to be 24"
in your basement/crawlspace if you have one.
This house of mine was designed and custom built by us in 1994. None of
such thing as OSB panels, laminated beams, engineered floor like craps.
Joists are 16" OC of course. Two person Jaccuzi in our bathroom never
even caused floor squeak.
I know every thing about this house of mine built in '94. Wife designed
it with a help from an architect, hired a contractor with excellent
reputation(he built our last house). I still have a set of blue prints.
Framing, wiring, plumbing, hvac duct runs all can be checked and traced.
No wall under the proposed space. The joists are 2x9, and where the
bath will go they are (oddly) 4", 12", 13", and 4" apart! Also the
floorboards above them are set diagonally across them--don't know if
that spreads the load any differently.
if your wooden framed house sways just a bit in the winter windstorm
or shakes just a bit when the washing machine runs on the second
floor, the water capacity of the tub at about one pint equals a pound
will be enhanced by the weight of how many people weighing up to how
many pounds at what floor level, may actually be be of no concern if
you are replacing an existing tub that came with the house with one of
if the second story of the my old 1910 size 1500 sq ft footprint
building is loaded with a king size waterbed and 1 super single
waterbeds, 1 clawfoot bathtub, 1 modern bathtub, washing machine,
foundation a half basement, other half on zero crawlspace, walls 16"
on center [O.C.] actual 2 x 4" frame, 2" x 10" first floor ceiling
joists spanning a former first floor high ceiling general store, this
works here but your results may vary. and for us i would have skipped
it since our family of four preferred to get a hot shower, get clean,
and get out. the electric circulating pump still works, one
directional adjuster is wobbly, no water leaks. sanitizing the
recirculating piping may be even a greater concern as we know more
about more health risks now than 20 years ago.
see your search for spa or hot tub at:
There's a simple test. Rent a cow for the weekend. Walk the cow into
your bathroom. If the floor holds the cow, you are fine. If not you
need to replace the floor and the cow, but you'll have lots of
hamburgers to complete the job.
Your house sounds like it was well-built. The diagonal laydown is more
to reduce stress and buckling along the two orthogonal horizontal axes
of the house. I had an old house with this type of construction.
Tongue and groove base floor (diagonal laydown) with solid oak
flooring above. The oak boards ran parallel to one of the walls,
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