Downloadable Checklist: Summer Deep Cleaning & Mold Prevention for Chapter Houses

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Kitchen & Common Areas

Drains, Sewer & Plumbing Systems

Routine Drain & Plumbing Care

Flush floor drains (especially in basements, laundry rooms, and mechanical spaces) to prevent traps from drying out and sewer gas entry
Inspect floor drains for blockages, slow drainage, or odors that may indicate buildup or developing sewer issues
Ensure strainers or covers are in place on floor drains to reduce debris entry
Visually inspect under sinks, behind toilets, and around laundry connections specifically for slow leaks or corrosion, not just cleanliness
Run water in infrequently used sinks, showers, and tubs to maintain water in traps and reduce sewer gas exposure

Sewer Backup Prevention

Identify and document the location of all floor drains and lower‑level plumbing fixtures at the property
Confirm availability and condition of drain plugs or stoppers for use during heavy rain events (if appropriate for the property)
Review whether the property has a backwater prevention valve and schedule inspection/maintenance if one is installed
Review our Sewer & Drain Care article for further explanation

Bathrooms

Bedrooms & Storage

Basement & Utility Areas

Inspect for signs of standing water or leaks
Run dehumidifiers as needed
Clean AC drip pans and check filters
Ensure gutters, exterior drains, and downspouts direct water away from the foundation
Inspect and clean behind washers and dryers, checking hoses, drain pans, and floor drains for debris or moisture marks.
Confirm dryer vents are clear and properly vented outdoors

General Mold Prevention

Keep HVAC running (set to auto with temp ~78–80°F)
Place moisture absorbers in closets or bathrooms
Schedule at least one mid-summer walkthrough
Review maintenance logs and check for unresolved plumbing issues
Remove items stored directly on basement floors (store on shelving or pallets)
Avoid over‑sealing the house—confirm some airflow remains in low‑use areas when HVAC is running

Mechanical & Exterior

Confirm condensate lines are clear for AC units and dehumidifiers—slow clogs are a common source of hidden summer leaks
Check sump pumps (if present) by testing operation and confirming discharge lines are unobstructed—especially before peak summer storms
Walk the property after heavy rain to identify areas of pooling water near foundation walls or drain exits
Confirm exterior drain paths stay clear of mulch, leaves, and landscaping growth through the summer—not just once at the beginning of the season

Planning & Documentation
These are especially helpful for houses with summer residents or rotating volunteers:

Assign responsibility for summer walkthroughs (who checks the house and how often)
Document where water shut‑off locations are and confirm at least one on‑site or local contact knows how to access them
Confirm reporting expectations: Who to notify if a slow drain, odor, or moisture issue is noticed during summer occupancy