Closed-cell spray foam insulation is stronger structurally, as each cell is packed closer together than in the makeup of open-cell foam, making the result harder and denser. Open-cell foam is made from tiny bubbles formed by water from the blowing agent (closed-ce…

• This information is for comparing open-cell spray foam to closed-cell spray foam. Open Cell Benefits - Has an R-value of 3.5 per inch, is better for soundproofing, more affordable than closed cell spray foam, expands a lot, is easier to trim, and seals leaks aroun…