Before the First Freeze: A Fall Checklist for Preventing Water Damage in Southeast Michigan

November 2, 2026

By Numark Services editorial team

Updated November 2, 2026

Before freeze-up, make three things clear: where water could escape, whether vulnerable plumbing will stay warm, and who can respond if nobody is at the property. Disconnect outdoor hoses, inspect accessible areas from a safe dry location, locate the domestic water shutoff, and arrange professional checks for unresolved heating, roof-drainage, and sump-system concerns. If you find an active leak, switch from prevention to safe source control and moisture assessment rather than finishing the checklist.

This fall guide is for Southeast Michigan homeowners, landlords, and property managers preparing occupied or vacant buildings. It focuses on preventing water damage before freezing weather, not setting a year-round maintenance schedule or specifying snow and ice removal. A completed checklist is a record of preparation, not a guarantee against a leak.

What owners can check today

Disconnect outdoor hoses and identify exposed plumbing

Remove, drain, and store hoses used outdoors. Identify the hose connections they served and any indoor isolation valves associated with those connections. The American Red Cross frozen-pipe guidance recommends draining outdoor hoses and protecting water lines in unheated areas before cold weather. It identifies exterior-wall plumbing, garages, crawl spaces, and other unheated locations as common freezing concerns.

Do not assume every outdoor faucet drains the same way. If you cannot identify the arrangement, ask a plumber to explain the winterizing procedure for that installation. Follow the manufacturer's or installer's directions for irrigation and other outdoor supply systems. Do not improvise by adding automotive antifreeze to water lines.

From accessible areas, note plumbing near exterior walls, garage walls, unheated storage spaces, and kitchen or bathroom cabinets. Look for missing or damaged pipe insulation without removing building materials. Photograph the location and record which room or fixture the pipe serves, if known. An uncertain pipe route belongs on the service list rather than being marked protected.

Check heat where plumbing is vulnerable

Confirm that the heating system responds to its normal controls and that expected supply outlets are not blocked by stored belongings. Check the conditions in rooms containing vulnerable plumbing, not just the temperature displayed on a thermostat elsewhere. A comfortable living room does not establish what is happening inside an exterior-wall cabinet or a remote utility space.

The Red Cross recommends keeping garage doors closed when the garage contains water supply lines, allowing warmer room air to circulate around cabinet plumbing, and moving harmful cleaners out of children's reach when cabinets are open. It also recommends leaving heat on at no lower than 55°F when going away during cold weather. That is general prevention guidance, not proof that every pipe in every assembly will remain warm enough. Ask a qualified heating or plumbing professional about cold spots and the needs of your building.

Do not rely on an unattended portable heater as the winter protection plan. If the system is unreliable, a vulnerable space is consistently cold, or the property will be vacant, arrange service before freeze-up and document the interim plan.

Locate and label the domestic water shutoff

Find the domestic water shutoff while the area is dry and accessible. Ask a plumber or the building's responsible maintenance person to identify it if you are unsure. A familiar-looking valve may serve only one fixture or another building system.

Label the confirmed domestic shutoff, keep its approach clear, and write down who is authorized to operate it. Do not interfere with fire-sprinkler, gas, or other unrelated controls. A corroded, leaking, or difficult valve needs professional assessment; do not force it to test your strength. For a shared building, confirm which units or common areas would lose domestic water and who must be notified.

Keep the location in a private property record available to the approved responder. A photo can help explain the location, but it is not a substitute for confirming the valve's function and safe access.

Inspect roof drainage from ground level

Walk accessible ground around the building and look for obvious gutter debris, disconnected downspout sections, staining beneath an overflowing gutter, or discharge directed toward the foundation. Note existing dampness in the basement or crawl space if it can be observed safely. Do not climb onto the roof or use a ladder to complete this owner check.

The CDC flooded-home safety guidance advises preventing outdoor water from reentering, including directing roof and gutter drainage away from the house. Use visible observations to request an inspection, not to diagnose concealed roof or drainage defects. A downspout that appears clear from the yard may still need professional cleaning or repair.

What to have serviced before freeze

Turn observations into assigned work

Make a short service list with the location, observation, requested assessment, responsible trade, and completion status. “Rear hose faucet: winterizing method unknown” is more useful than “plumbing checked.” Ask the plumber to assess exposed supply lines, outdoor faucet arrangements, insulation needs, and the domestic shutoff. Any heat cable or other protection must suit the installation and follow its product requirements; a shopping receipt alone does not confirm safe installation.

Have a qualified heating contractor address unreliable operation and cold areas. Ask what was serviced, what remains unresolved, and what the approved vacancy settings should be. For roof drainage, request safe cleaning and evaluation of the specific locations you observed. Numark Services roofing can be a starting point for discussing roof-related concerns; do not treat ground-level photographs as a roof clearance.

Arrange a professional sump and backup check

If the building has a sump system, arrange a professional check of the pump, power supply, float operation, discharge arrangement, and any backup system. Ask the technician to use the equipment's instructions and explain which parts were actually tested. Do not enter a wet pit area, reach into equipment, or disconnect power as a casual checklist task.

For a battery or other backup, request a recorded check of its condition and operating readiness. Clarify what the backup is intended to support and how alarms reach the responsible person. Ask whether the discharge path needs winter preparation and who will address any issue. A light on a charger or a previous service date is not, by itself, a demonstrated backup test.

Keep the diagnosis, equipment details, unresolved items, and next service recommendation together. This prevention step is distinct from a drying assessment after water has already entered the building.

Establish a vacancy contact plan

Name a primary responder and a backup. Give authorized people the key or entry procedure, domestic shutoff location, heating contractor details, and instructions for reporting a leak or loss of heat. Keep access codes and resident information private rather than posting them publicly.

Agree on check-in frequency based on the property, weather, and responsible professional's advice. Decide who receives temperature or water alarms, who acknowledges them, and what happens when the primary contact cannot be reached. If no monitoring equipment exists, do not describe the building as monitored.

Before an absence, verify that the approved heating plan is in place and that somebody can act on an alert. In a rental or shared building, use established resident-notification and access procedures. Numark Services property maintenance can help you discuss the preparation list and outstanding property concerns.

What to do if you discover an active leak

Stop the prevention walkthrough. Keep people away from standing water, affected electrical equipment, and uncertain areas. If the confirmed domestic shutoff is safely reachable from a dry location and you are authorized to use it, use the established procedure to stop the domestic supply. If the source or valve is uncertain, call the appropriate professional rather than experimenting with controls. A roof leak, drain backup, or groundwater entry may not stop when domestic water is shut off.

The CDC says never operate electrical tools or switch power on or off while standing in water. If reaching the main power switch requires entering standing water, call an electrician. A qualified electrician should check affected electrical systems before power is restored. Treat floodwater or an unknown source as a potential contamination concern; do not assume it is safe because it looks clear.

From a safe dry position, record when the leak was discovered, the affected rooms, and any source-control work already completed. Take original photos only when safe. Tell the response team about electrical concerns, access limits, and whether the water source is known. Avoid promising that a room is dry because visible water is gone.

Request Numark Services water mitigation to discuss affected materials and the drying scope, separately from the plumbing or roof repair that addresses the source. If rebuilding is needed afterward, ask about the restoration service and the findings that support that handoff. For an immediate threat to life or safety, contact emergency services rather than waiting for a website reply.

A short closeout checklist

• Outdoor hoses removed; unfamiliar winterizing arrangements assigned to a plumber.
• Vulnerable plumbing locations recorded; cold spaces and unreliable heat assigned for service.
• Domestic shutoff confirmed, labeled, accessible, and known to authorized responders.
• Roof drainage observed from ground level; suspected problems assigned for professional inspection.
• Sump and backup checks documented, with unresolved items and alarm contacts identified.
• Vacancy primary and backup contacts agreed; access and notification procedures confirmed.

Is a 55°F thermostat setting enough for every building?

No setting confirms the condition of every concealed pipe. The Red Cross gives 55°F as a minimum when away during cold weather, but cold areas, system reliability, and the building's plumbing arrangement still need assessment.

Should I shut off water for every vacancy?

Ask the responsible plumber or property professional for a building-specific plan. Shared domestic service, equipment requirements, and other systems make a universal instruction inappropriate. Confirm what each valve controls before any change.

Can I wait until spring if a small leak stops?

A stopped drip does not establish that the source is repaired or concealed materials are dry. Record what happened and request assessment of the source and affected assemblies rather than treating the absence of visible water as closure.

For fall preparation or an existing water-damage concern, contact Numark Services or call [1-844-4-NUMARK, (844) 468-6275](tel:+18444686275). The phone line is available 24/7; meetings are by appointment only. Describe whether you need preventive property maintenance, active-leak mitigation, or restoration planning so the next conversation starts with the right scope.