False Spring: The Most Dangerous Week of Winter

A 55-degree day in February changes behavior.

Tenants open windows. Snow piles shrink. Vendors relax. Teams mentally move on to spring projects.

Operationally, this is one of the most dangerous periods of the year.

Across much of the U.S., some of the most expensive freeze events occur after warm stretches. Buildings become vulnerable during the transition - when winter risk still exists but winter discipline fades.

Warm weeks are not the end of winter. They're the last preparation window.

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Why Late-Winter Failures Happen

Complacency Drift

By mid-February, most teams are tired of winter operations.

Snow fatigue sets in.

The building hasn't changed, but the mindset around it has.

The Freeze Thaw Damage Cycle

This is the real technical risk.

Repeated thawing and refreezing causes:

• Expansion and contraction of materials

• Water infiltration into cracks and joints

• Pipe insulation degradation

• Increased likelihood of leaks and failures

When temperatures swing from 55°F during the day to 20°F at night, buildings experience maximum material stress.

A pipe doesn't fail because it froze once. It fails because it froze, thawed, froze again, and a inspection cycle missed the degradation.

Deferred Maintenance Exposure

Small winter issues surface when temperatures rise:

• Ice melts and reveals roof leaks

• Temporary repairs fail under thermal cycling

• Mechanical systems work harder as temperatures fluctuate

• Drainage systems activate for the first time in months and clog

Warm weather doesn't create these problems. It exposes them.

The Late-Winter Risk Window: System by System

Plumbing Systems

Late winter is prime time for leaks.

Common risks:

• Freeze/thaw pipe expansion damage

• Insulation gaps exposed after melting

• Heat trace failures going unnoticed during cold snaps

• Irrigation systems reactivated too early by well-meaning landscapers

What to do this week:

• Walk mechanical rooms and riser spaces - look for wet insulation, corrosion, or visible pipe movement

• Inspect pipe insulation and heat trace systems for gaps or failures

• Test sump pumps and floor drains

• Confirm irrigation systems remain winterized until consistent temps above 50°F

Reality check: Many "spring leaks" actually started in January. You're finding them now because the ice finally melted.

Roofing Systems

Warm spells reveal hidden winter roof damage.

Watch for:

• Ice dam aftermath - membrane separation, torn flashing

• Drain and scupper blockages from debris and ice buildup

• Membrane stress and separation at seams

• Ponding from snowmelt that wasn't visible under snow cover

What to do this week:

• Conduct a roof walk after the next major thaw

• Clear debris from drains and scuppers - standing water freezes overnight and damages membranes

• Inspect flashing and roof penetrations for new gaps or movement

• Document any new ponding areas - these become summer leaks

Cost avoidance: This single 60-minute inspection can prevent six-figure emergency repairs in March.

Building Envelope & Parking Structures

Freeze-thaw cycles are hardest on exterior materials.

Risk areas:

• Façade cracking from thermal expansion

• Sealant failures at expansion joints

• Window and door leaks from degraded weather seals

• Parking garage deterioration - spalling concrete, exposed rebar

What to do this week:

• Inspect expansion joints and sealants on façade and garage decks

• Walk garage decks, ramps, and stairwells - look for new cracks or salt damage

• Check door closures and weather seals (warm weather shows you where cold air has been leaking)

• Document new cracking or spalling with photos and locations

The pattern: Late winter is when small cracks become major water infiltration paths. Catching them now means controlled repair scheduling. Missing them means emergency waterproofing in April.

HVAC & Mechanical Systems

This is heavy cycling season.

Rapid temperature swings force systems to constantly adjust:

• Boilers run harder than expected as overnight temps drop

• Heat pumps switch modes repeatedly, increasing failure risk

• BAS setpoints conflict (heating schedule vs. actual outdoor temp)

• Comfort complaints spike as zones can't keep up with swings

What to do this week:

• Review BAS schedules and setpoints - does the sequence make sense for 30°F nights and 55°F days?

• Check heating complaint trends by zone

• Confirm preventive maintenance is current (filters, belts, controls)

The reality: Mechanical fatigue peaks right before spring. Equipment that survived January can fail in March because of cycling stress.

The Snow Return Reality

March snowstorms are common across much of the country.

The problem: Many buildings quietly stand down winter operations too early.

Typical gaps:

• Salt inventory drops below response threshold

• Communication templates disappear into email archives

Late-season storms often cause outsized disruption because readiness has slipped.

What to do this week:

• Reconfirm snow vendor readiness and guaranteed response times

• Verify salt inventory - restock now while pricing is still reasonable

• Test emergency contact lists (call them, don't just review the spreadsheet)

• Locate and update storm communication templates

The pattern: Winter rarely ends quietly. The buildings that get caught are the ones that assumed it was over.

The False Spring Checklist

This is your window to reset winter readiness before the final stretch.

Operations

• Reconfirm vendor readiness (snow, emergency HVAC, plumbing)

• Verify and test emergency contacts

• Check spare parts inventory (filters, belts, pipe insulation)

• Review incident response plans and update if needed

Building Systems

• Walk mechanical rooms - look for leaks, corrosion, insulation damage

• Inspect roof and drainage systems after next thaw

• Check garages and exterior surfaces for new damage

• Review BAS trends and alarms - are setpoints causing problems?

Risk Management

• Refresh freeze response plans

• Update tenant communication templates

• Confirm emergency staffing coverage (especially if temps drop drastically overnight)

• Document inspection findings with photos and notes

Treat this as a mini seasonal reset. You're not transitioning out of winter - you're preparing for winter's last move.

The Leadership Perspective

Reactive teams assume winter is over. Prepared teams assume winter has one more move.

Seasonal leadership means operating one season ahead.

Warm weeks are not permission to relax. They're the final opportunity to prepare before risk returns.

Winter rarely ends with a easy transition into spring.

The most expensive freeze events happen in March, not January - because teams let their guard down during false spring.

Use this warm stretch to walk your building, test your systems, and confirm your vendors are still ready.

Because when the next cold snap hits, you won't have time to prepare. You'll only have time to respond.

What's the late winter failure you've seen that no one talks about? Share it in the comments - other leaders need to know what to watch for.