Spray Foam Insulation Needed

 I'm looking for a source for polyurethane type spray foam insulation. I have
a 12 year old hot tub that is still very nice and in very good condition,
especially the fiberglass shell and solid mahogany frame. However,
underneath, the shell only has a few inches of spray foam insulation. I'd
like to fill the remaining space with foam insulation to save energy.

Are there any sources that sell a single application spray foam kit that
might be able to cover the rest of the hot tub cavity (I'm guessing about
100 cubic feet)? Are there any other types of insulation that would work?
Fiberglass insulation won't work and the small aerosol cans of foam aren't
practical.

Thanks for any suggestions.

-Rob

 

insulation. I have

condition,

However,

insulation. I'd

energy.

kit that

guessing about

would work?

foam aren't

Why won't fiberglass insulation work? It works fine on my tub.

Bob

 Good question.  First, I'd be concerned about mold and rot with fiberglass
insulation. Also, my hot tub has a heat blower that blows hot bubbles
through dozens of little jets. The intake is from inside the cavity;
therefore, I don't want to be blowing fiberglass particles into the tub.
Polyurethane foam seems better suited to hot tubs, and in general, I'm just
a little uneasy having fiberglass insulation around bathers. Therefore,
unless I can be convinced otherwise, I'd prefer to avoid it.

 Just be sure that filling up the cavity of the tub won't ruining it. If
you have a mold problem the foam will not be the cure for it.

FC

butlercellars wrote:

 

Grainger's has it.
http://www.grainger.com/Grainger/productdetail.jsp?xi=xi&ItemId 11574493&ccitem=