A Quick Check of Higher-Risk Areas

A simple, non-invasive walkthrough may help you identify visible water damage, suspected mold growth, musty odors, or other signs of a possible moisture problem.

Focus on areas where water is used, where leaks commonly occur, and where moisture may remain hidden. Look, document, and stop. Don’t disturb materials or place yourself at risk.

Before You Begin

If possible, have someone who is less sensitive perform the walkthrough.

Use only simple items:

• A flashlight
• A phone or camera
• A notepad or checklist

You don’t need to move heavy appliances, remove materials, open equipment, or enter difficult spaces.

Stop the walkthrough if you encounter:

• Standing water near electrical equipment
• Sewage or contaminated water
• Unsafe flooring or structural damage
• Heavy visible suspected mold growth
• An area that causes strong or sudden symptoms
• Any space that you cannot enter safely

If an area appears unsafe, avoid it and seek qualified professional help.

What Are You Looking For?

You are looking for obvious warning signs—not trying to confirm whether something is mold.

Pay attention to:

• Active leaks or standing water
• Water stains or discoloration
• Damp or damaged materials
• Swollen cabinets, trim, or flooring
• Peeling or bubbling paint
• Soft or crumbling drywall
• Rust or corrosion around plumbing or HVAC equipment
• Visible suspected mold growth
• Persistent musty or earthy odors
• Evidence of repeated repairs

Not everything that looks dark, dirty, or stained is mold. Document what you observe without touching, wiping, scraping, or smelling it closely.

Under Sinks and Inside Cabinets

Begin with cabinets containing plumbing.

Look under:

• Kitchen sinks
• Bathroom sinks
• Wet bars
• Utility sinks

Check for visible leaks, staining, swelling, damaged cabinet materials, or musty odors.

Pay attention to the bottom of the cabinet, the plumbing connections, and the area where pipes enter the wall. If accessible, look at the cabinet toe kick near the floor without removing it.

A slow plumbing leak may cause damage before water becomes visible outside the cabinet.

Bathrooms, Tubs, and Showers

Bathrooms regularly contain moisture, but that doesn’t mean recurring water damage should be considered normal.

Look around:

• Toilets
• Bathtubs
• Showers
• Sinks and vanities
• Bathroom ceilings
• Walls and flooring next to plumbing fixtures
• Exhaust fans and nearby vents

Watch for loose or damaged caulk, recurring stains, soft materials, peeling paint, swollen trim, or damage around the base of a toilet. For this quick check, simply document what you observe.

Appliances and Other Plumbing Areas

Several appliances and household systems use or drain water.

Check the accessible areas around:

• Washing machines
• Dishwashers
• Refrigerators with water lines
• Water heaters
• Water softeners
• Ice makers
• Utility rooms

Look for moisture, staining, corrosion, warped flooring, damaged baseboards, or signs that a leak has happened before.

Don’t pull out heavy appliances or disconnect water lines. If you cannot see behind or beneath something safely, leave it for a qualified professional.

HVAC Equipment and Airflow Pathways

HVAC systems can collect moisture and move air throughout the home. This can make an HVAC-related problem more important to the Leave-or-Stay decision.

Without opening or taking apart equipment, look at accessible:

• HVAC closets
• Air handlers
• Condensate drain lines
• Drain pans
• Supply registers
• Return-air grilles
• Areas around HVAC equipment

Notice any standing water, staining, corrosion, damaged insulation, visible suspected growth, or persistent musty odors.

Also consider whether an odor becomes stronger when the HVAC system begins operating.

Don’t open sealed equipment, remove internal components, or attempt to clean suspected contamination. An HVAC system should be evaluated by someone qualified to inspect it safely.

Crawlspaces, Basements, and Attics

Crawlspaces, basements, and attics may contain plumbing, HVAC equipment, roof leaks, condensation, ground moisture, or drainage problems.

From a safe and accessible location, look for:

• Standing water
• Wet soil
• Damp or damaged insulation
• Water stains
• Condensation
• Suspected growth
• Musty odors
• Evidence of roof or plumbing leaks

Don’t enter a crawlspace, attic, or basement that appears unsafe. These areas may contain electrical hazards, unstable surfaces, pests, contaminated materials, or limited space.

If you cannot inspect the area safely, note that it still needs to be evaluated.

Windows, Doors, Ceilings, and Exterior Walls

Moisture can also enter through the exterior of the home.

Look around:

• Windows
• Exterior doors
• Skylights
• Ceilings below the roof
• Exterior-facing walls
• Areas near chimneys or roof penetrations
• Rooms below bathrooms or other plumbing

Watch for staining, bubbling paint, swollen materials, damaged trim, recurring condensation, or signs of previous repair.

Notice whether a stain or odor becomes worse after rain. This may suggest an active or recurring moisture problem.

Document—Don’t Disturb

Take photographs and brief notes about anything unusual.

Record:

• What you observed
• Where you observed it
• Whether the area was wet or dry
• Whether an odor was present
• Whether the problem appears isolated or affects multiple areas
• Whether the area can be avoided
• Whether the condition appears active, recurring, or previously repaired

Avoid:

• Cutting or opening walls
• Pulling up flooring
• Removing cabinets or trim
• Scraping or wiping suspected growth
• Opening HVAC equipment
• Moving heavy appliances
• Collecting samples from disturbed materials

The purpose of this walkthrough is to identify warning signs and decide what should happen next—not to perform a complete assessment.

What Does This Mean for the Leave-or-Stay Decision?

Finding one small stain doesn’t automatically mean you need to leave the home.

Greater caution may be appropriate when you find:

• Active water or wet materials
• Strong or persistent musty odors
• Visible suspected growth
• Warning signs in multiple areas
• Possible HVAC involvement
• A problem in a bedroom or frequently occupied space
• Damage that cannot be avoided or isolated
• Conditions that appear unsafe
• Signs that repairs or remediation may disturb damaged materials

The more significant, widespread, active, or difficult to avoid the conditions appear, the more reasonable it may be to temporarily leave while the home is professionally evaluated or repaired.

Your personal risk also matters. A condition that may be manageable for one household could deserve greater caution when someone is medically vulnerable or experiencing increased sensitivity.