Keeps the Heat In My Hot Tub
Great project insulation. I used it to make a roll-up swim-spa cover. Poly tarp upper, this foam roll layer 19-ft long 8-ft wide, poly tarp bottom, painted wooden rods 8-ft long across… 58 of them for the 19-ft length. Holds the spa heat in nicely. Energy bill has stayed low. One roll got me the 8-ft by 19-ft coverage with some foam roll material left over.






