NFPA 80 FIRE DOOR INSPECTION

DoorProof

Fire Door Inspection Log

Record the gap, and see where it falls against the limit you picked.

DoorProof draws the assembly, puts a badge on each applicable gap, and shows the limit that applies underneath while you set the reading. Work the checklist, photograph what failed, sign it on the phone, and the inspection report comes out before you leave the building. No account, no portal, no signal.

14-day full trial, no card.
$3.99/mo · $29.99/yr · $79.99 once.

Android
Works offline
Inches or millimetres
No account
10 languages

The DoorProof gap blueprint: a fire door drawn head on with tappable gap badges at the top jamb, hinge stile, latch stile and undercut, each showing its reading in inches and whether it sits inside the permitted band

Where a fire door gets measured, and the limit for each

The clearance that applies depends on where the reading is taken and how the assembly is built, and the meeting stile only exists on a pair. DoorProof puts the applicable limit on screen under the reading you are setting, so the figures are not being carried in your head or read off a card in the van. Below is the app's default configuration: NFPA 80, single leaf, wood core, inches, under the editions named at the foot of this section.

Top jamb

up to 1/8"

Rule shown in the app: NFPA 80 6.3.1.7, wood leaf

A maximum, with no minimum stated for a wood leaf. A hollow metal leaf is the one carrying a tolerance either side of nominal.

Hinge stile

up to 1/8"

Rule shown in the app: NFPA 80 6.3.1.7, wood leaf

The same limit down the hinge edge, taken where the gap looks worst rather than at a fixed height.

Latch stile

up to 1/8"

Rule shown in the app: NFPA 80 6.3.1.7, wood leaf

A reading close to the limit still sits inside it, and the app marks it so the next visit knows to look again.

Meeting stile

up to 1/8"

Rule shown in the app: NFPA 80 6.3.1.7, wood leaf

Only drawn on a pair. Set the door to double leaf and the badge appears down the centre of the schematic.

Undercut

up to 3/4"

Rule shown in the app: NFPA 80 6.3.1.8

Measured from the bottom of the door to the top of the finished floor or floor covering. Adding smoke gasketing does not by itself replace this limit.

A hollow metal leaf carries a tolerance either side of a nominal 1/8 in., which places a reading out to 3/16 in. at the upper end of that configured band. That tolerance is the hollow metal provision, so it is not applied to an ordinary wood leaf. Change the leaf material on the door record and the limits on the blueprint change with it. Confirm the assembly listing and the adopted edition before relying on either. Section references on this page are to NFPA 80 and NFPA 105; check the editions your jurisdiction has adopted.

The NFPA 80 fire door gap tolerances in full

The rule set is a choice, and it is recorded

Pick NFPA 80 and you get the US bands in inches. Pick the optional UK rule set and you get BS 8214:2016, where the perimeter gap is 3 mm nominal inside a 2 mm to 4 mm band, the threshold allows 10 mm, and fitting smoke seals tightens that threshold to 3 mm. Two different standards, two different sets of numbers, and the app does not blend them.

Whichever rule set an inspection was taken under is stamped on that inspection when it is saved. Switch a phone from one to the other next year and earlier results stay tied to the rule set that was selected when they were saved. What the app records is the rule you chose, which is not the same as establishing what your jurisdiction adopted.

Inches step in sixteenths and print as the fraction the standard is written in
Separate bands for wood and hollow metal leaves
A reading near the top of a band is marked to watch, and still sits inside it
A minimum is applied only where the selected rule supplies one
The on-screen comparison and the printed limit use the same stored value

A building produces two documents

Both are rendered on the phone from the inspections you logged, and shared straight from it. Neither is a template filled in afterwards at a desk.

PDF

Fire Door Inspection Report

One section per door, carrying the inspection you just completed.

Cover: Building, address, date, inspector, credentials, the standard applied, and the disclaimer
Per door: Reference, location, rating, leaf material, each gap reading with the limit it was compared against, and the result
Checklist: All eight sections with pass, fail or not applicable, and your notes
Evidence: The photos attached to each item, and your captured signature

Built page by page in a background isolate, so a building with a lot of photos does not freeze the phone.

What the eight checklist sections cover

PDF

Deficiency register

Everything that failed across the building, and what has been raised against it.

Raised from: Each failed checklist item, automatically, when the inspection is saved
Each entry: The door, the item that failed, a priority and a target date
Ordered by: Priority, so a self-closer that will not latch is not sitting under signage
Closed out: Marked done against the door, and the history stays with it

A failed closing or latching item is given a higher default priority. You can change the priority and the target date on any action the app raises.

The app itself

Captures from the shipped build, filled with sample records.

Scroll sideways, or use the arrow keys

The DoorProof inspection checklist with numbered items for door leaf and frame integrity, gaps and tolerances, intumescent and cold smoke seals and hinges and hardware, each offering pass, fail or not applicable — The checklist. Nothing counts as a pass until you mark it.

A DoorProof fire door record showing its reference, location, fire rating, leaf material and configuration above a list of past inspections with their verdicts — One door: its specification, and every inspection it has had.

The DoorProof sign-off screen with the overall verdict, the inspector name and credentials, and a captured signature drawn on the phone — Sign-off, on the phone, at the door.

The DoorProof dashboard showing a building with its door count, how many inspections are due and a list of recent inspections with pass and fail verdicts — The dashboard: what is due, and what has just been done.

The DoorProof corrective actions list, each entry naming the door, the failed item, a priority and a target date — Corrective actions, raised from the items that failed.

Finding the same door again next year

The hard part of a re-inspection is not the measuring, it is working out which of many near-identical doors you are standing in front of. DoorProof prints tag sheets for a whole building at once. Scan the tag on the door and its specification opens along with the inspection history stored in DoorProof.

Due dates run off the same record. Set the annual interval, add any extra interval the owner or the contract asks for, and the phone tells you before each one falls due rather than after.

QR or asset tag scanned to open the door record
Printable tag sheets generated per building
Annual plus any additional interval the job requires
Reminders fire on the phone, with no server behind them

What it does not do

DoorProof is a record-keeping and audit-assistance tool. It does not inspect anything, it does not certify anything, and it cannot make a door assembly compliant. NFPA 80 is a consensus standard: its enforceability and the applicable edition depend on adoption, on incorporation into another code or requirement, and on the authority having jurisdiction. The requirements that apply on your job come from there, not merely from the rule set selected in the app.

The same wording sits on the cover of every report the app produces, in Settings, and during onboarding:

DoorProof is a professional record-keeping and audit-assistance tool. It reduces compliance overhead and organizes inspection data but does not substitute for certified structural fire engineering assessments or statutory fire authority sign-offs.

Nothing is recorded as a pass unless you mark it. There is no default state in which an inspection nobody carried out comes out compliant.

What it costs

STANDARD TIER

No charge

Install it and everything works for fourteen days with no card. After that the standard tier keeps going, with limits.

One building and up to five doors
The blueprint, the checklist, photos and the report
Reminders, backup and restore
Shows a banner ad

Records you have already made are never hidden, locked or deleted, and you can still export them. The cap only stops new ones.

FULL

$79.99once

or $3.99 a month, or $29.99 a year

Removes every limit. The one-off price does not renew, and updates are included.

Unlimited buildings and doors
Custom QR labels and batch tag sheets
Removes the ads

An inspector working a single building never has to pay. The price is aimed at someone carrying a portfolio.

Get DoorProof

Questions

Does DoorProof decide whether the door passes?

No. It compares each reading with the rule set you selected and shows where it falls. The judgement stays yours. The app records which standard and which rule every result was reached under.

Which standard does it work to?

NFPA 80, in inches, by default. An optional UK rule set covers BS 8214:2016 and applicable Regulation 10 checks. Whichever you pick is stamped on the inspection, so changing it later never re-judges a finished record.

Does it actually work in inches?

Yes, and that is the default. Readings step in sixteenths and print as the fraction the standard is written in, so a 1/8 in. gap reads as 1/8 in. rather than as a converted decimal. Millimetres are one setting away.

Do I need a signal on site?

No. There is no account, no portal and no upload. Records are stored on the phone and the PDF is built on the phone, so a plant room with no bars changes nothing about the job.

What happens to my records when I change phone?

Settings writes one backup file holding every building, door, inspection and photo, and your signature with them. Restore it on the new phone and the register comes back whole.

What does the standard tier leave out?

It caps you at one building and five doors, and shows a banner ad. Everything else works: the blueprint, the checklist, photos, the report, reminders and backup. Every install gets fourteen days of all of it first.

Start with the next building

Add the building, add the first door, and take the five readings the way you would write them on the sheet. The report is one tap from there.