What's included
- Top and bottom chords
- Web members and bridging
- Bearing ends and connections
Not included
- Painting, rust treatment or structural work
- Spray-on fireproofing
Why it matters
The lattice design of bar joists creates many small ledges that hold dust.
Settled joist dust falls on inventory and equipment when the building vibrates.
How AELC providers clean joists and trusses
Every AELC Network Provider follows the AELC Source-Control Method: do not move the contamination; capture it or contain it. For joists and trusses, that means:
- Identify. Note joist spacing, height and any fireproofing, and plan access.
- Capture. Vacuum chords and webs from the top down.
- Verify. Inspect sections and photograph.
Typical reach class: Extended Reach or Elevated Access. About AELC reach classes.
How often should joists and trusses be cleaned?
| Setting | Recommended frequency |
|---|---|
| Warehouses and manufacturing | Every 12 months |
| Retail and gyms | Every 6 to 12 months |
Grease, lint, humidity and how visible the area is can shorten these intervals. See how often high dusting should be done.
How much does joist and truss cleaning cost?
Typical range: $0.08–$0.25 per square foot of floor (per floor sq ft). Priced by floor area because joist density is fairly uniform.
Prices are set by each independent provider. Ranges reflect published market data and AELC time standards. See the full above-eye-level cleaning cost guide.
DIY vs. hiring a pro
- Combine joist cleaning with high-bay lights and HVLS fans to share lift time.
Safety and when to stop
- Do not disturb spray-applied fireproofing.
- Stop for combustible or unknown process dust.
See the full list of red-light conditions and what AELC does not do.
Industries that need it
Joist and Truss Cleaning: frequently asked questions
Why is combustible dust a concern?
Some industrial dusts can ignite when suspended in air. AELC providers stop and escalate where combustible or unknown process dust may be present.
Last updated October 4, 2026. Reviewed by the AELC Method team. Above Eye Level Cleaning is a national network of independently owned cleaning companies; local providers set their own prices and perform the work.