Identify the protected hazard and the type of foam system, then compare discharge devices, concentrate storage, proportioning equipment, water supply, drainage, and alarm connections with the current architectural, process, and civil drawings. AI can flag document conflicts; the system designer confirms coverage and compliance.
What does NFPA 11 cover?
NFPA 11 is the Standard for Low-, Medium-, and High-Expansion Foam. NFPA describes it as covering the design, installation, operation, testing, and maintenance of low-, medium-, and high-expansion foam systems, with criteria for fixed, semi-fixed, or portable systems for interior and exterior hazards.
NFPA’s official NFPA 11 page identifies the 2024 edition as current when checked on October 2, 2026. Confirm the edition, local amendments, and project scope that actually govern the work. The publisher’s newest edition does not establish local adoption.
Foam systems often sit inside another standard’s scope: an aircraft hangar under the NFPA 409 guide, a flammable liquid storage area under the NFPA 30 guide, or a foam-water sprinkler system alongside NFPA 13. Record which standard sets the protection requirement and which sets the foam system design.
Gather the hazard, the system, and the supply
Collect the foam system layout and riser, the process or equipment drawings for the protected hazard, architectural plans and sections, concentrate storage and proportioning room plans, the water supply and fire pump documents, drainage and containment drawings, detection and release locations, and the fire alarm interface.
Confirm which issue each package comes from. Tanks, dikes, and equipment are often moved after the foam design is drawn. Record any manufacturer data the design relies on but the package does not include.
Trace the foam system through every discipline
| Review question | Sources to compare | Decision to record |
|---|---|---|
| Protected hazard | Foam notes, process drawings, room names | Confirm the same hazard and boundaries are named throughout. |
| Discharge devices | Foam layout, equipment layout, sections | Identify equipment, tanks, or obstructions added since the layout was drawn. |
| Concentrate and proportioning | Foam room plan, specifications, product data | Match the named concentrate and equipment across drawings and specifications. |
| Water supply | Fire pump documents, fire service main, riser diagram | Reconcile the supply the foam system expects with the supply drawn. |
| Drainage and containment | Civil and plumbing drainage, dikes, trench drains | Ask how discharged foam solution is contained where drawings disagree. |
| Detection and alarm | Release devices, sequence, fire alarm drawings | Confirm actuation and alarm connections appear in both packages. |
Carry supply questions into the NFPA 20 fire pump guide and alarm questions into the NFPA 72 interface review.
Example: a new dike wall that the foam layout ignores
Hypothetical example. The current civil drawings add a dike wall around a group of storage tanks, while the foam layout still shows discharge devices positioned for the earlier open arrangement. The drainage plan routes the diked area to a different outlet than the foam narrative describes.
The current civil drawings add a dike around these tanks, while the foam system layout reflects the earlier arrangement and the drainage outlet differs from the foam narrative. Please confirm the protected area and coordinate the discharge and drainage design.
The foam system designer revises the layout for the current hazard, and the civil engineer confirms drainage. A drawing mismatch is a coordination question, not a finding that the system is inadequate.
Review foam system coordination with Groundbook
Upload the current project PDFs and relevant specifications to Groundbook. Identify the governing issues and add the applicable NFPA 11 reference from a copy you are licensed to use, where the license permits uploading it. State the edition, amendments, review area, and known exclusions in your instructions.
Compare the foam system layout, notes, and specifications with the current process, architectural, civil, fire pump, and fire alarm documents. Flag hazards that moved, inconsistent concentrate or equipment, and conflicting drainage. Use the supplied NFPA 11 reference where applicable and cite both sources.
Groundbook links each potential finding to the sheets and sections behind it. Confirm tank and equipment tags and revisions before sending a question.
Document review does not calculate application rates, discharge durations, or concentrate quantities, and does not approve the installation. Those remain with the qualified designer and the authority having jurisdiction.