There's no universal answer. The right foam depends on where it's going, what you're trying to fix, and what the budget is. We'll give you a straight recommendation — not just the most expensive option.
| Feature | Open Cell | Closed Cell |
|---|---|---|
| R-Value per inch | ~R-3.7 | ~R-6.5 to R-7 |
| Acts as vapor barrier | ✗ No | ✓ Yes |
| Water resistance | ✗ Absorbs moisture | ✓ Waterproof |
| Structural rigidity | ✗ Soft / flexible | ✓ Rigid, adds strength |
| Expands on application | ✓ ~100x expansion | ~30–40x expansion |
| Cost per sq ft | ✓ Lower cost | Higher cost |
| Ideal for interior walls/attics | ✓ Yes | ✓ Yes |
| Ideal for crawlspaces | ✗ Not recommended | ✓ Strongly recommended |
| Ideal for coastal/flood areas | ✗ Not recommended | ✓ Required |
| Ideal for metal buildings | Acceptable | ✓ Preferred |
When It Makes Sense
Open cell does an excellent job of air sealing and insulating interior spaces. It expands aggressively to fill every gap and cavity.
When It's Worth the Investment
In Louisiana, closed cell is often the right call. Our climate, humidity, and flooding risk make moisture resistance critical in many applications.
Just call us. Tell us what you're working with and we'll tell you what makes sense — honestly, without just upselling you to the most expensive option.