Laboratory Lease Floor Inspection: What to Check Before You Sign

By Pablo Figueroa · November 10, 2026 · 4 min read

A lab lease usually gets an engineer's eye on the air handling, the power and the vibration. The floor, which has to take wheels, spills and a cleaning program for years, often gets a walk across it. This guide covers what is worth checking first, and what to ask the landlord.

Why look at the floor before the lease?

Because the floor transfers with the space. Whatever condition it is in on signing day becomes your condition, and a floor is slow and disruptive to fix once equipment and people are in the room.

Facilities Dive, in an October 2026 article by Mark DiNapoli, makes a related point about life science space: don't assume a ground floor will meet your vibration criteria, have the space tested if vibration is a concern, and confirm floor loading capacity against your equipment weights. Those are structural questions for an engineer. The surface question is separate, and it is the one a flooring provider can answer.

What should the inspection cover?

Start with four things, in this order:

The surface. What is it: bare concrete, a coating, tile, sheet goods? Is it worn through, lifting, stained or soft anywhere?

  • Joints and cracks. Where do they run, and are they filled or open?
  • The edges. How does the floor meet the wall, the door thresholds and any drains?
  • The record. Dated photographs of every defect, with a floor plan marked up beside them.
  • What do the rules say about a cleanable floor?

Be careful here, because the rules most often quoted are written for drug manufacturing, not for every lab. Your quality or regulatory lead decides which, if any, apply to your work. For reference:

  • FDA's 2004 guidance on sterile drug products made by aseptic processing says floors, walls and ceilings should be smooth, hard surfaces that can be easily cleaned, and lists seamless and rounded floor-to-wall junctions as an example of adequate design.
  • EU GMP Chapter 3 says interior surfaces should be smooth, free from cracks and open joints, should not shed particulate matter, and should allow easy cleaning and, if necessary, disinfection.
  • A 2016 technical bulletin hosted by the NIH Office of Research Facilities, on cGMP and pharmacy compounding spaces, calls for monolithic seamless floors with integral coved bases and sealed joints.

None of those documents certifies a floor. They describe what to aim for, and an inspection tells you how far the space you are touring sits from it.

What about drains?

Ask where they are before you assume you can add one. The Bozenhardts, writing in Outsourced Pharma on leasing a biotech manufacturing facility, note that installing a drain means cutting the concrete floor, running the drain line and re-concreting the area. EU GMP Chapter 3 asks for drains of adequate size with trapped gullies, and says open channels should be avoided where possible.

What should you ask the landlord?

  • What is the floor today, and when was it last coated, repaired or replaced?
  • Is there a written record of past repairs, spills or moisture problems?
  • Who pays to repair or restore the floor, and what condition must it be in when you leave?
  • Can you take photographs and bring a flooring provider on your walk?

Take the answers to your broker or attorney. Who bears the cost depends on the lease, and we do not give legal advice.

How does DTI do it?

A DTI estimator walks the space with you and puts the findings in writing: what the floor is, what we see wrong with it, and what a fix would involve. It is free, and the list is yours whichever way the deal goes. If the lease is signed, the same list becomes your baseline.

Looking at a lab or pharma space right now? Request the free pre-lease floor survey or call (209) 879-9674 before the signature makes the floor yours.

Sources: Facilities Dive, "Avoiding infrastructure issues in life science spaces" (Mark DiNapoli, Oct 30, 2026); FDA, Guidance for Industry: Sterile Drug Products Produced by Aseptic Processing (2004, archived copy); EU GMP Chapter 3, Premises and Equipment; NIH Office of Research Facilities technical bulletin, "Construction Features and Interior Finishes in cGMP and Pharmacy Compounding Facilities" (Issue 50, March 2016); Bozenhardt and Bozenhardt, Outsourced Pharma, "A Due Diligence Checklist for Leasing a Biotech Manufacturing Facility".

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Featured image: AI-generated illustration of a pre-lease laboratory floor inspection, not a photograph of a completed DTI project.