Foam we spray
Profoam ProFill Open-Cell Spray Foam
ProFill is an open-cell spray foam from PROFOAM Corporation, our supplier. We use it where open-cell belongs: attic rooflines and interior walls. Every number here comes from the manufacturer's data sheet.
In short
Open-cell, water blown
The data sheet says water is the blowing agent.
R-13 at 3.5 inches
R-3.8 at 1 inch and R-13 at 3.5 inches, per the data sheet.
24 hours for homeowners
Re-occupancy for homeowners is listed as 24 hours with 10 air changes per hour.
PROFOAM Corporation of Rutledge, Georgia, makes ProFill. The data sheet describes it as a two-part open-cell spray polyurethane foam insulation system.
Open-cell foam is what we use on attic rooflines and interior walls. Read more about open-cell spray foam, or see our main open-cell foam, Accufoam AF1.
From the data sheet
| Property | Value on the data sheet | Test method |
|---|---|---|
| R-value at 1 inch | 3.8 | ASTM C518 |
| R-value at 3.5 / 6 inches | 13 / 22 | Data sheet R-value table |
| Density (nominal) | 0.5 lb/ft³ | ASTM D1622 |
| Water vapor transmission | 21 perm at 1 inch | ASTM E96 |
| Air permeance at 3.5 inches | less than 0.02 L/s·m² | ASTM E283 |
| Surface burning | Flame spread under 20, smoke developed under 400 (Class 1) | ASTM E84 |
| Re-entry, trades | 1 hour at 10 air changes per hour | ASTM D8445 |
| Re-occupancy, homeowners | 24 hours at 10 air changes per hour | ASTM D8445 |
Source: PROFOAM ProFill Technical Data Sheet, read Sep 28, 2026. The data sheet lists an IAPMO Uniform Evaluation Service report and GREENGUARD Gold certification; the report number on the data sheet and on the supplier's product page differ, so we link to the documents rather than quote a number.
Fire safety
The data sheet notes that spray foam is combustible and must be covered with an approved thermal barrier, such as gypsum wallboard, where the code requires it, and that it meets AC377 Appendix X for attics and crawl spaces only when covered with an approved intumescent coating. Ask us which applies to your space.
Documents
Questions
Common questions
The data sheet lists R-3.8 at 1 inch, R-13 at 3.5 inches and R-22 at 6 inches.
The data sheet lists re-occupancy for homeowners at 24 hours with 10 air changes per hour of ventilation (ASTM D8445). We confirm the time for your job before the day.
Next step
Ask which foam we would use in your building
The product, the applied depth and the price, in writing, before anything is ordered. Free to book.