Sometimes members of the starling family have historically been called grackles. Tristram's starling is sometimes known as Tristram's grackle, and the hill mynas in the genus Gracula have also been called grackles.ometimes members of the starling family have historically been called grackles. Tristram's starling is sometimes known as Tristram's grackle, and the hill mynas in the genus Gracula have also been called grackles.
Waterproofing an old limestone foundation from the exterior with âClosed Cellâ spray polyurethane foam provides a water tight seal from the outside.
1 The cost of spray foam insulation is usually expressed per board foot, which is a measure of volume (not linear feet). 2  1 board foot is equal to 144 cubic inches, or a board that measures 1 foot long and 1 foot wide and 1 inch thick.3  Open-cell spray foam costs $.40 to $.70 per board foot.pray Foam Insulation Prices. While the function of spray foam insulationâto keep buildings warm during cold weather and cool during warm weatherâis the same as traditional pink fiberglass insulation, thatâs where the similarities between the two materials end.